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I been trying to create a screencast over the past week, not having much luck. recordmydesktop laggs too much, istanbul drops too many frames, and the closest I have gotten is with xvidcap. But when I play the recorded clip, it's like its playing in ffw. Is there a program that will let me slow down the frame rate on the exported vid?
Have you tried ffmpeg to adjust the video (change framerate, etc)?
Nope, I guess Ima need to read into ffmpeg a bit more. As far as I always new it was just a plugin codec for multimedia players. I read a lil about patching ffmpeg, but Im not even sure how its used outside of what I know about it.
From ffmpeg man page:
From ffmpeg -h:Code:FFMPEG(1) FFMPEG(1)
NAME
ffmpeg - FFmpeg video converter
SYNOPSIS
ffmpeg [[infile options][-i infile]]... {[outfile options] outfile}...
DESCRIPTION
As a general rule, options are applied to the next specified file.
Therefore, order is important, and you can have the same option on the
command line multiple times. Each occurrence is then applied to the
next input or output file.
* To set the video bitrate of the output file to 64kbit/s:
ffmpeg -i input.avi -b 64k output.avi
* To force the frame rate of the output file to 24 fps:
ffmpeg -i input.avi -r 24 output.avi
* To force the frame rate of the input file (valid for raw formats
only) to 1 fps and the frame rate of the output file to 24 fps:
ffmpeg -r 1 -i input.m2v -r 24 output.avi
The format option may be needed for raw input files.
By default, FFmpeg tries to convert as losslessly as possible: It uses
the same audio and video parameters for the outputs as the one speci-
fied for the inputs.
OPTIONS
Main options
-L Show license.
-h Show help.
-version
Show version.
-formats
Show available formats, codecs, bitstream filters, protocols, and
frame size and frame rate abbreviations.
The fields preceding the format and codec names have the following
meanings:
D Decoding available
E Encoding available
V/A/S
Video/audio/subtitle codec
S Codec supports slices
D Codec supports direct rendering
T Codec can handle input truncated at random locations instead of
only at frame boundaries
-f fmt
Force format.
-i filename
input file name
-y Overwrite output files.
-t duration
Restrict the transcoded/captured video sequence to the duration
specified in seconds. "hh:mm:ss[.xxx]" syntax is also supported.
-fs limit_size
Set the file size limit.
-ss position
Seek to given time position in seconds. "hh:mm:ss[.xxx]" syntax is
also supported.
-itsoffset offset
Set the input time offset in seconds. "[-]hh:mm:ss[.xxx]" syntax
is also supported. This option affects all the input files that
follow it. The offset is added to the timestamps of the input
files. Specifying a positive offset means that the corresponding
streams are delayed by ’offset’ seconds.
-title string
Set the title.
-timestamp time
Set the timestamp.
-author string
Set the author.
-copyright string
Set the copyright.
-comment string
Set the comment.
-album string
Set the album.
-track number
Set the track.
-year number
Set the year.
-v number
Set the logging verbosity level.
-target type
Specify target file type ("vcd", "svcd", "dvd", "dv", "dv50",
"pal-vcd", "ntsc-svcd", ... ). All the format options (bitrate,
codecs, buffer sizes) are then set automatically. You can just
type:
ffmpeg -i myfile.avi -target vcd /tmp/vcd.mpg
Nevertheless you can specify additional options as long as you know
they do not conflict with the standard, as in:
ffmpeg -i myfile.avi -target vcd -bf 2 /tmp/vcd.mpg
-dframes number
Set the number of data frames to record.
-scodec codec
Force subtitle codec (’copy’ to copy stream).
-newsubtitle
Add a new subtitle stream to the current output stream.
-slang code
Set the ISO 639 language code (3 letters) of the current subtitle
stream.
Video Options
-b bitrate
Set the video bitrate in bit/s (default = 200 kb/s).
-vframes number
Set the number of video frames to record.
-r fps
Set frame rate (Hz value, fraction or abbreviation), (default =
25).
-s size
Set frame size. The format is wxh (ffserver default = 160x128, ffm-
peg default = same as source). The following abbreviations are
recognized:
sqcif
128x96
qcif
176x144
cif 352x288
4cif
704x576
qqvga
160x120
qvga
320x240
vga 640x480
svga
800x600
xga 1024x768
uxga
1600x1200
qxga
2048x1536
sxga
1280x1024
qsxga
2560x2048
hsxga
5120x4096
wvga
852x480
wxga
1366x768
wsxga
1600x1024
wuxga
1920x1200
woxga
2560x1600
wqsxga
3200x2048
wquxga
3840x2400
whsxga
6400x4096
whuxga
7680x4800
cga 320x200
ega 640x350
hd480
852x480
hd720
1280x720
hd1080
1920x1080
-aspect aspect
Set aspect ratio (4:3, 16:9 or 1.3333, 1.7777).
-croptop size
Set top crop band size (in pixels).
-cropbottom size
Set bottom crop band size (in pixels).
-cropleft size
Set left crop band size (in pixels).
-cropright size
Set right crop band size (in pixels).
-padtop size
Set top pad band size (in pixels).
-padbottom size
Set bottom pad band size (in pixels).
-padleft size
Set left pad band size (in pixels).
-padright size
Set right pad band size (in pixels).
-padcolor hex_color
Set color of padded bands. The value for padcolor is expressed as a
six digit hexadecimal number where the first two digits represent
red, the middle two digits green and last two digits blue (default
= 000000 (black)).
-vn Disable video recording.
-bt tolerance
Set video bitrate tolerance (in bits, default 4000k). Has a mini-
mum value of: (target_bitrate/target_framerate). In 1-pass mode,
bitrate tolerance specifies how far ratecontrol is willing to devi-
ate from the target average bitrate value. This is not related to
min/max bitrate. Lowering tolerance too much has an adverse effect
on quality.
-maxrate bitrate
Set max video bitrate (in bit/s). Requires -bufsize to be set.
-minrate bitrate
Set min video bitrate (in bit/s). Most useful in setting up a CBR
encode:
ffmpeg -i myfile.avi -b 4000k -minrate 4000k -maxrate 4000k -bufsize 1835k out.m2v
It is of little use elsewise.
-bufsize size
Set video buffer verifier buffer size (in bits).
-vcodec codec
Force video codec to codec. Use the "copy" special value to tell
that the raw codec data must be copied as is.
-sameq
Use same video quality as source (implies VBR).
-pass n
Select the pass number (1 or 2). It is used to do two-pass video
encoding. The statistics of the video are recorded in the first
pass into a log file (see also the option -passlogfile), and in the
second pass that log file is used to generate the video at the
exact requested bitrate. On pass 1, you may just deactivate audio
and set output to null, examples for Windows and Unix:
ffmpeg -i foo.mov -vcodec libxvid -pass 1 -an -f rawvideo -y NUL
ffmpeg -i foo.mov -vcodec libxvid -pass 1 -an -f rawvideo -y /dev/null
-passlogfile prefix
Set two-pass log file name prefix to prefix, the default file name
prefix is ‘‘ffmpeg2pass’’. The complete file name will be PRE-
FIX-N.log, where N is a number specific to the output stream.
-newvideo
Add a new video stream to the current output stream.
Advanced Video Options
-pix_fmt format
Set pixel format. Use ’list’ as parameter to show all the supported
pixel formats.
-sws_flags flags
Set SwScaler flags (only available when compiled with swscale sup-
port).
-g gop_size
Set the group of pictures size.
-intra
Use only intra frames.
-vdt n
Discard threshold.
-qscale q
Use fixed video quantizer scale (VBR).
-qmin q
minimum video quantizer scale (VBR)
-qmax q
maximum video quantizer scale (VBR)
-qdiff q
maximum difference between the quantizer scales (VBR)
-qblur blur
video quantizer scale blur (VBR) (range 0.0 - 1.0)
-qcomp compression
video quantizer scale compression (VBR) (default 0.5). Constant of
ratecontrol equation. Recommended range for default rc_eq: 0.0-1.0
-lmin lambda
minimum video lagrange factor (VBR)
-lmax lambda
max video lagrange factor (VBR)
-mblmin lambda
minimum macroblock quantizer scale (VBR)
-mblmax lambda
maximum macroblock quantizer scale (VBR)
These four options (lmin, lmax, mblmin, mblmax) use ’lambda’ units,
but you may use the QP2LAMBDA constant to easily convert from ’q’
units:
ffmpeg -i src.ext -lmax 21*QP2LAMBDA dst.ext
-rc_init_cplx complexity
initial complexity for single pass encoding
-b_qfactor factor
qp factor between P- and B-frames
-i_qfactor factor
qp factor between P- and I-frames
-b_qoffset offset
qp offset between P- and B-frames
-i_qoffset offset
qp offset between P- and I-frames
-rc_eq equation
Set rate control equation (default = "tex^qComp").
-rc_override override
rate control override for specific intervals
-me_method method
Set motion estimation method to method. Available methods are
(from lowest to best quality):
zero
Try just the (0, 0) vector.
phods
log
x1
hex
umh
epzs
(default method)
full
exhaustive search (slow and marginally better than epzs)
-dct_algo algo
Set DCT algorithm to algo. Available values are:
0 FF_DCT_AUTO (default)
1 FF_DCT_FASTINT
2 FF_DCT_INT
3 FF_DCT_MMX
4 FF_DCT_MLIB
5 FF_DCT_ALTIVEC
-idct_algo algo
Set IDCT algorithm to algo. Available values are:
0 FF_IDCT_AUTO (default)
1 FF_IDCT_INT
2 FF_IDCT_SIMPLE
3 FF_IDCT_SIMPLEMMX
4 FF_IDCT_LIBMPEG2MMX
5 FF_IDCT_PS2
6 FF_IDCT_MLIB
7 FF_IDCT_ARM
8 FF_IDCT_ALTIVEC
9 FF_IDCT_SH4
10 FF_IDCT_SIMPLEARM
-er n
Set error resilience to n.
1 FF_ER_CAREFUL (default)
2 FF_ER_COMPLIANT
3 FF_ER_AGGRESSIVE
4 FF_ER_VERY_AGGRESSIVE
-ec bit_mask
Set error concealment to bit_mask. bit_mask is a bit mask of the
following values:
1 FF_EC_GUESS_MVS (default = enabled)
2 FF_EC_DEBLOCK (default = enabled)
-bf frames
Use ’frames’ B-frames (supported for MPEG-1, MPEG-2 and MPEG-4).
-mbd mode
macroblock decision
0 FF_MB_DECISION_SIMPLE: Use mb_cmp (cannot change it yet in FFm-
peg).
1 FF_MB_DECISION_BITS: Choose the one which needs the fewest
bits.
2 FF_MB_DECISION_RD: rate distortion
-4mv
Use four motion vector by macroblock (MPEG-4 only).
-part
Use data partitioning (MPEG-4 only).
-bug param
Work around encoder bugs that are not auto-detected.
-strict strictness
How strictly to follow the standards.
-aic
Enable Advanced intra coding (h263+).
-umv
Enable Unlimited Motion Vector (h263+)
-deinterlace
Deinterlace pictures.
-ilme
Force interlacing support in encoder (MPEG-2 and MPEG-4 only). Use
this option if your input file is interlaced and you want to keep
the interlaced format for minimum losses. The alternative is to
deinterlace the input stream with -deinterlace, but deinterlacing
introduces losses.
-psnr
Calculate PSNR of compressed frames.
-vstats
Dump video coding statistics to vstats_HHMMSS.log.
-vstats_file file
Dump video coding statistics to file.
-top n
top=1/bottom=0/auto=-1 field first
-dc precision
Intra_dc_precision.
-vtag fourcc/tag
Force video tag/fourcc.
-qphist
Show QP histogram.
-vbsf bitstream_filter
Bitstream filters available are "dump_extra", "remove_extra",
"noise", "h264_mp4toannexb", "imxdump", "mjpegadump".
ffmpeg -i h264.mp4 -vcodec copy -vbsf h264_mp4toannexb -an out.h264
Audio Options
-aframes number
Set the number of audio frames to record.
-ar freq
Set the audio sampling frequency (default = 44100 Hz).
-ab bitrate
Set the audio bitrate in bit/s (default = 64k).
-ac channels
Set the number of audio channels (default = 1).
-an Disable audio recording.
-acodec codec
Force audio codec to codec. Use the "copy" special value to specify
that the raw codec data must be copied as is.
-newaudio
Add a new audio track to the output file. If you want to specify
parameters, do so before "-newaudio" ("-acodec", "-ab", etc..).
Mapping will be done automatically, if the number of output streams
is equal to the number of input streams, else it will pick the
first one that matches. You can override the mapping using "-map"
as usual.
Example:
ffmpeg -i file.mpg -vcodec copy -acodec ac3 -ab 384k test.mpg -acodec mp2 -ab 192k -newaudio
-alang code
Set the ISO 639 language code (3 letters) of the current audio
stream.
Advanced Audio options:
-atag fourcc/tag
Force audio tag/fourcc.
-absf bitstream_filter
Bitstream filters available are "dump_extra", "remove_extra",
"noise", "mp3comp", "mp3decomp".
Subtitle options:
-scodec codec
Force subtitle codec (’copy’ to copy stream).
-newsubtitle
Add a new subtitle stream to the current output stream.
-slang code
Set the ISO 639 language code (3 letters) of the current subtitle
stream.
-sbsf bitstream_filter
Bitstream filters available are "mov2textsub", "text2movsub".
ffmpeg -i file.mov -an -vn -sbsf mov2textsub -scodec copy -f rawvideo sub.txt
Audio/Video grab options
-vc channel
Set video grab channel (DV1394 only).
-tvstd standard
Set television standard (NTSC, PAL (SECAM)).
-isync
Synchronize read on input.
Advanced options
-map input_stream_id[:sync_stream_id]
Set stream mapping from input streams to output streams. Just enu-
merate the input streams in the order you want them in the output.
sync_stream_id if specified sets the input stream to sync against.
-map_meta_data outfile:infile
Set meta data information of outfile from infile.
-debug
Print specific debug info.
-benchmark
Add timings for benchmarking.
-dump
Dump each input packet.
-hex
When dumping packets, also dump the payload.
-bitexact
Only use bit exact algorithms (for codec testing).
-ps size
Set packet size in bits.
-re Read input at native frame rate. Mainly used to simulate a grab
device.
-loop_input
Loop over the input stream. Currently it works only for image
streams. This option is used for automatic FFserver testing.
-loop_output number_of_times
Repeatedly loop output for formats that support looping such as
animated GIF (0 will loop the output infinitely).
-threads count
Thread count.
-vsync parameter
Video sync method. Video will be stretched/squeezed to match the
timestamps, it is done by duplicating and dropping frames. With
-map you can select from which stream the timestamps should be
taken. You can leave either video or audio unchanged and sync the
remaining stream(s) to the unchanged one.
-async samples_per_second
Audio sync method. "Stretches/squeezes" the audio stream to match
the timestamps, the parameter is the maximum samples per second by
which the audio is changed. -async 1 is a special case where only
the start of the audio stream is corrected without any later cor-
rection.
-copyts
Copy timestamps from input to output.
-shortest
Finish encoding when the shortest input stream ends.
-dts_delta_threshold
Timestamp discontinuity delta threshold.
-muxdelay seconds
Set the maximum demux-decode delay.
-muxpreload seconds
Set the initial demux-decode delay.
Preset files
A preset file contains a sequence of option=value pairs, one for each
line, specifying a sequence of options which would be awkward to spec-
ify on the command line. Lines starting with the hash (’#’) character
are ignored and are used to provide comments. Check the ffpresets
directory in the FFmpeg source tree for examples.
Preset files are specified with the "vpre", "apre" and "spre" options.
The options specified in a preset file are applied to the currently
selected codec of the same type as the preset option.
The argument passed to the preset options identifies the preset file to
use according to the following rules.
First ffmpeg searches for a file named arg.ffpreset in the directories
$HOME/.ffmpeg, and in the datadir defined at configuration time (usu-
ally PREFIX/share/ffmpeg) in that order. For example, if the argument
is "libx264-max", it will search for the file libx264-max.ffpreset.
If no such file is found, then ffmpeg will search for a file named
codec_name-arg.ffpreset in the above-mentioned directories, where
codec_name is the name of the codec to which the preset file options
will be applied. For example, if you select the video codec with
"-vcodec libx264" and use "-vpre max", then it will search for the file
libx264-max.ffpreset.
Finally, if the above rules failed and the argument specifies an abso-
lute pathname, ffmpeg will search for that filename. This way you can
specify the absolute and complete filename of the preset file, for
example ./ffpresets/libx264-max.ffpreset.
FFmpeg formula evaluator
When evaluating a rate control string, FFmpeg uses an internal formula
evaluator.
The following binary operators are available: "+", "-", "*", "/", "^".
The following unary operators are available: "+", "-", "(...)".
The following statements are available: "ld", "st", "while".
The following functions are available:
sinh(x)
cosh(x)
tanh(x)
sin(x)
cos(x)
tan(x)
atan(x)
asin(x)
acos(x)
exp(x)
log(x)
abs(x)
squish(x)
gauss(x)
mod(x, y)
max(x, y)
min(x, y)
eq(x, y)
gte(x, y)
gt(x, y)
lte(x, y)
lt(x, y)
bits2qp(bits)
qp2bits(qp)
The following constants are available:
PI
E
iTex
pTex
tex
mv
fCode
iCount
mcVar
var
isI
isP
isB
avgQP
qComp
avgIITex
avgPITex
avgPPTex
avgBPTex
avgTex
EXAMPLES
Video and Audio grabbing
FFmpeg can grab video and audio from devices given that you specify the
input format and device.
ffmpeg -f oss -i /dev/dsp -f video4linux2 -i /dev/video0 /tmp/out.mpg
Note that you must activate the right video source and channel before
launching FFmpeg with any TV viewer such as xawtv (<http://linux.byte-
sex.org/xawtv/>) by Gerd Knorr. You also have to set the audio record-
ing levels correctly with a standard mixer.
X11 grabbing
FFmpeg can grab the X11 display.
ffmpeg -f x11grab -s cif -i :0.0 /tmp/out.mpg
0.0 is display.screen number of your X11 server, same as the DISPLAY
environment variable.
ffmpeg -f x11grab -s cif -i :0.0+10,20 /tmp/out.mpg
0.0 is display.screen number of your X11 server, same as the DISPLAY
environment variable. 10 is the x-offset and 20 the y-offset for the
grabbing.
Video and Audio file format conversion
* FFmpeg can use any supported file format and protocol as input:
Examples:
* You can use YUV files as input:
ffmpeg -i /tmp/test%d.Y /tmp/out.mpg
It will use the files:
/tmp/test0.Y, /tmp/test0.U, /tmp/test0.V,
/tmp/test1.Y, /tmp/test1.U, /tmp/test1.V, etc...
The Y files use twice the resolution of the U and V files. They are raw
files, without header. They can be generated by all decent video
decoders. You must specify the size of the image with the -s option if
FFmpeg cannot guess it.
* You can input from a raw YUV420P file:
ffmpeg -i /tmp/test.yuv /tmp/out.avi
test.yuv is a file containing raw YUV planar data. Each frame is com-
posed of the Y plane followed by the U and V planes at half vertical
and horizontal resolution.
* You can output to a raw YUV420P file:
ffmpeg -i mydivx.avi hugefile.yuv
* You can set several input files and output files:
ffmpeg -i /tmp/a.wav -s 640x480 -i /tmp/a.yuv /tmp/a.mpg
Converts the audio file a.wav and the raw YUV video file a.yuv to MPEG
file a.mpg.
* You can also do audio and video conversions at the same time:
ffmpeg -i /tmp/a.wav -ar 22050 /tmp/a.mp2
Converts a.wav to MPEG audio at 22050 Hz sample rate.
* You can encode to several formats at the same time and define a map-
ping from input stream to output streams:
ffmpeg -i /tmp/a.wav -ab 64k /tmp/a.mp2 -ab 128k /tmp/b.mp2 -map 0:0 -map 0:0
Converts a.wav to a.mp2 at 64 kbits and to b.mp2 at 128 kbits. ’-map
file:index’ specifies which input stream is used for each output
stream, in the order of the definition of output streams.
* You can transcode decrypted VOBs:
ffmpeg -i snatch_1.vob -f avi -vcodec mpeg4 -b 800k -g 300 -bf 2 -acodec libmp3lame -ab 128k snatch.avi
This is a typical DVD ripping example; the input is a VOB file, the
output an AVI file with MPEG-4 video and MP3 audio. Note that in this
command we use B-frames so the MPEG-4 stream is DivX5 compatible, and
GOP size is 300 which means one intra frame every 10 seconds for
29.97fps input video. Furthermore, the audio stream is MP3-encoded so
you need to enable LAME support by passing "--enable-libmp3lame" to
configure. The mapping is particularly useful for DVD transcoding to
get the desired audio language.
NOTE: To see the supported input formats, use "ffmpeg -formats".
* You can extract images from a video:
ffmpeg -i foo.avi -r 1 -s WxH -f image2 foo-%03d.jpeg
This will extract one video frame per second from the video and will
output them in files named foo-001.jpeg, foo-002.jpeg, etc. Images will
be rescaled to fit the new WxH values.
The syntax "foo-%03d.jpeg" specifies to use a decimal number composed
of three digits padded with zeroes to express the sequence number. It
is the same syntax supported by the C printf function, but only formats
accepting a normal integer are suitable.
If you want to extract just a limited number of frames, you can use the
above command in combination with the -vframes or -t option, or in com-
bination with -ss to start extracting from a certain point in time.
* You can put many streams of the same type in the output:
ffmpeg -i test1.avi -i test2.avi -vcodec copy -acodec copy -vcodec copy -acodec copy test12.avi -newvideo -newaudio
In addition to the first video and audio streams, the resulting output
file test12.avi will contain the second video and the second audio
stream found in the input streams list.
The "-newvideo", "-newaudio" and "-newsubtitle" options have to be
specified immediately after the name of the output file to which you
want to add them.
SEE ALSO
ffserver(1), ffplay(1) and the HTML documentation of ffmpeg.
AUTHOR
Fabrice Bellard
2009-03-10 FFMPEG(1)
Code:FFmpeg version SVN-r17925, Copyright (c) 2000-2009 Fabrice Bellard, et al.
configuration: --enable-shared --prefix=/usr
libavutil 50. 0. 0 / 50. 0. 0
libavcodec 52.21. 0 / 52.21. 0
libavformat 52.31. 1 / 52.31. 1
libavdevice 52. 1. 0 / 52. 1. 0
libswscale 0. 7. 1 / 0. 7. 1
built on Mar 10 2009 10:43:05, gcc: 4.1.2 20071124 (Red Hat 4.1.2-42)
usage: ffmpeg [[infile options] -i infile]... {[outfile options] outfile}...
Hyper fast Audio and Video encoder
Main options:
-L show license
-h show help
-version show version
-formats show available formats, codecs, protocols, ...
-f fmt force format
-i filename input file name
-y overwrite output files
-t duration record or transcode "duration" seconds of audio/video
-fs limit_size set the limit file size in bytes
-ss time_off set the start time offset
-itsoffset time_off set the input ts offset
-itsscale stream:scale set the input ts scale
-timestamp time set the timestamp ('now' to set the current time)
-metadata string=string add metadata
-dframes number set the number of data frames to record
-v number set the logging verbosity level
-target type specify target file type ("vcd", "svcd", "dvd", "dv", "dv50", "pal-vcd", "ntsc-svcd", ...)
-xerror exit on error
Advanced options:
-map file:stream[:syncfile:syncstream] set input stream mapping
-map_meta_data outfile:infile set meta data information of outfile from infile
-benchmark add timings for benchmarking
-dump dump each input packet
-hex when dumping packets, also dump the payload
-re read input at native frame rate
-loop_input loop (current only works with images)
-loop_output number of times to loop output in formats that support looping (0 loops forever)
-threads count thread count
-vsync video sync method
-async audio sync method
-adrift_threshold threshold audio drift threshold
-vglobal video global header storage type
-copyts copy timestamps
-shortest finish encoding within shortest input
-dts_delta_threshold threshold timestamp discontinuity delta threshold
-programid desired program number
-copyinkf copy initial non-keyframes
-muxdelay seconds set the maximum demux-decode delay
-muxpreload seconds set the initial demux-decode delay
Video options:
-b bitrate set bitrate (in bits/s)
-vb bitrate set bitrate (in bits/s)
-vframes number set the number of video frames to record
-r rate set frame rate (Hz value, fraction or abbreviation)
-s size set frame size (WxH or abbreviation)
-aspect aspect set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)
-croptop size set top crop band size (in pixels)
-cropbottom size set bottom crop band size (in pixels)
-cropleft size set left crop band size (in pixels)
-cropright size set right crop band size (in pixels)
-padtop size set top pad band size (in pixels)
-padbottom size set bottom pad band size (in pixels)
-padleft size set left pad band size (in pixels)
-padright size set right pad band size (in pixels)
-padcolor color set color of pad bands (Hex 000000 thru FFFFFF)
-vn disable video
-vcodec codec force video codec ('copy' to copy stream)
-sameq use same video quality as source (implies VBR)
-pass n select the pass number (1 or 2)
-passlogfile prefix select two pass log file name prefix
-newvideo add a new video stream to the current output stream
Advanced Video options:
-pix_fmt format set pixel format, 'list' as argument shows all the pixel formats supported
-intra use only intra frames
-vdt n discard threshold
-qscale q use fixed video quantizer scale (VBR)
-rc_override override rate control override for specific intervals
-me_threshold threshold motion estimaton threshold
-deinterlace deinterlace pictures
-psnr calculate PSNR of compressed frames
-vstats dump video coding statistics to file
-vstats_file file dump video coding statistics to file
-intra_matrix matrix specify intra matrix coeffs
-inter_matrix matrix specify inter matrix coeffs
-top top=1/bottom=0/auto=-1 field first
-dc precision intra_dc_precision
-vtag fourcc/tag force video tag/fourcc
-qphist show QP histogram
-force_fps force the selected framerate, disable the best supported framerate selection
-vbsf bitstream_filter
-vpre preset set the video options to the indicated preset
Audio options:
-ab bitrate set bitrate (in bits/s)
-aframes number set the number of audio frames to record
-aq quality set audio quality (codec-specific)
-ar rate set audio sampling rate (in Hz)
-ac channels set number of audio channels
-an disable audio
-acodec codec force audio codec ('copy' to copy stream)
-vol volume change audio volume (256=normal)
-newaudio add a new audio stream to the current output stream
-alang code set the ISO 639 language code (3 letters) of the current audio stream
Advanced Audio options:
-atag fourcc/tag force audio tag/fourcc
-sample_fmt format set sample format, 'list' as argument shows all the sample formats supported
-absf bitstream_filter
-apre preset set the audio options to the indicated preset
Subtitle options:
-sn disable subtitle
-scodec codec force subtitle codec ('copy' to copy stream)
-newsubtitle add a new subtitle stream to the current output stream
-slang code set the ISO 639 language code (3 letters) of the current subtitle stream
-sbsf bitstream_filter
-spre preset set the subtitle options to the indicated preset
Audio/Video grab options:
-vc channel set video grab channel (DV1394 only)
-tvstd standard set television standard (NTSC, PAL (SECAM))
-isync sync read on input
AVCodecContext AVOptions:
-b <int> E.V.. set bitrate (in bits/s)
-ab <int> E..A. set bitrate (in bits/s)
-bt <int> E.V.. set video bitrate tolerance (in bits/s)
-flags <flags> EDVA.
mv4 E.V.. use four motion vector by macroblock (mpeg4)
obmc E.V.. use overlapped block motion compensation (h263+)
qpel E.V.. use 1/4 pel motion compensation
loop E.V.. use loop filter
gmc E.V.. use gmc
mv0 E.V.. always try a mb with mv=<0,0>
part E.V.. use data partitioning
gray EDV.. only decode/encode grayscale
psnr E.V.. error[?] variables will be set during encoding
naq E.V.. normalize adaptive quantization
ildct E.V.. use interlaced dct
low_delay EDV.. force low delay
alt E.V.. enable alternate scantable (mpeg2/mpeg4)
global_header E.VA. place global headers in extradata instead of every keyframe
bitexact EDVAS use only bitexact stuff (except (i)dct)
aic E.V.. h263 advanced intra coding / mpeg4 ac prediction
umv E.V.. use unlimited motion vectors
cbp E.V.. use rate distortion optimization for cbp
qprd E.V.. use rate distortion optimization for qp selection
aiv E.V.. h263 alternative inter vlc
slice E.V..
ilme E.V.. interlaced motion estimation
scan_offset E.V.. will reserve space for svcd scan offset user data
cgop E.V.. closed gop
-me_method <int> E.V.. set motion estimation method
zero E.V.. zero motion estimation (fastest)
full E.V.. full motion estimation (slowest)
epzs E.V.. EPZS motion estimation (default)
esa E.V.. esa motion estimation (alias for full)
tesa E.V.. tesa motion estimation
dia E.V.. dia motion estimation (alias for epzs)
log E.V.. log motion estimation
phods E.V.. phods motion estimation
x1 E.V.. X1 motion estimation
hex E.V.. hex motion estimation
umh E.V.. umh motion estimation
iter E.V.. iter motion estimation
-g <int> E.V.. set the group of picture size
-cutoff <int> E..A. set cutoff bandwidth
-frame_size <int> E..A.
-qcomp <float> E.V.. video quantizer scale compression (VBR)
-qblur <float> E.V.. video quantizer scale blur (VBR)
-qmin <int> E.V.. min video quantizer scale (VBR)
-qmax <int> E.V.. max video quantizer scale (VBR)
-qdiff <int> E.V.. max difference between the quantizer scale (VBR)
-bf <int> E.V.. use 'frames' B frames
-b_qfactor <float> E.V.. qp factor between p and b frames
-rc_strategy <int> E.V.. ratecontrol method
-b_strategy <int> E.V.. strategy to choose between I/P/B-frames
-hurry_up <int> .DV..
-ps <int> E.V.. rtp payload size in bits
-bug <flags> .DV.. workaround not auto detected encoder bugs
autodetect .DV..
old_msmpeg4 .DV.. some old lavc generated msmpeg4v3 files (no autodetection)
xvid_ilace .DV.. Xvid interlacing bug (autodetected if fourcc==XVIX)
ump4 .DV.. (autodetected if fourcc==UMP4)
no_padding .DV.. padding bug (autodetected)
amv .DV..
ac_vlc .DV.. illegal vlc bug (autodetected per fourcc)
qpel_chroma .DV..
std_qpel .DV.. old standard qpel (autodetected per fourcc/version)
qpel_chroma2 .DV..
direct_blocksize .DV.. direct-qpel-blocksize bug (autodetected per fourcc/version)
edge .DV.. edge padding bug (autodetected per fourcc/version)
hpel_chroma .DV..
dc_clip .DV..
ms .DV.. workaround various bugs in microsofts broken decoders
-lelim <int> E.V.. single coefficient elimination threshold for luminance (negative values also consider dc coefficient)
-celim <int> E.V.. single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)
-strict <int> EDVA. how strictly to follow the standards
very EDV.. strictly conform to a older more strict version of the spec or reference software
strict EDV.. strictly conform to all the things in the spec no matter what consequences
normal EDV..
inofficial EDV.. allow inofficial extensions
experimental EDV.. allow non standardized experimental things
-b_qoffset <float> E.V.. qp offset between P and B frames
-er <int> .DVA. set error detection aggressivity
careful .DV..
compliant .DV..
aggressive .DV..
very_aggressive .DV..
-mpeg_quant <int> E.V.. use MPEG quantizers instead of H.263
-qsquish <float> E.V.. how to keep quantizer between qmin and qmax (0 = clip, 1 = use differentiable function)
-rc_qmod_amp <float> E.V.. experimental quantizer modulation
-rc_qmod_freq <int> E.V.. experimental quantizer modulation
-rc_eq <string> E.V.. set rate control equation
-maxrate <int> E.V.. set max video bitrate tolerance (in bits/s)
-minrate <int> E.V.. set min video bitrate tolerance (in bits/s)
-bufsize <int> E.VA. set ratecontrol buffer size (in bits)
-rc_buf_aggressivity <float> E.V.. currently useless
-i_qfactor <float> E.V.. qp factor between P and I frames
-i_qoffset <float> E.V.. qp offset between P and I frames
-rc_init_cplx <float> E.V.. initial complexity for 1-pass encoding
-dct <int> E.V.. DCT algorithm
auto E.V.. autoselect a good one (default)
fastint E.V.. fast integer
int E.V.. accurate integer
mmx E.V..
mlib E.V..
altivec E.V..
faan E.V.. floating point AAN DCT
-lumi_mask <float> E.V.. compresses bright areas stronger than medium ones
-tcplx_mask <float> E.V.. temporal complexity masking
-scplx_mask <float> E.V.. spatial complexity masking
-p_mask <float> E.V.. inter masking
-dark_mask <float> E.V.. compresses dark areas stronger than medium ones
-idct <int> EDV.. select IDCT implementation
auto EDV..
int EDV..
simple EDV..
simplemmx EDV..
libmpeg2mmx EDV..
ps2 EDV..
mlib EDV..
arm EDV..
altivec EDV..
sh4 EDV..
simplearm EDV..
simplearmv5te EDV..
simplearmv6 EDV..
simpleneon EDV..
simplealpha EDV..
h264 EDV..
vp3 EDV..
ipp EDV..
xvidmmx EDV..
faani EDV.. floating point AAN IDCT
-ec <flags> .DV.. set error concealment strategy
guess_mvs .DV.. iterative motion vector (MV) search (slow)
deblock .DV.. use strong deblock filter for damaged MBs
-pred <int> E.V.. prediction method
left E.V..
plane E.V..
median E.V..
-aspect <rational> E.V.. sample aspect ratio
-debug <flags> EDVAS print specific debug info
pict .DV.. picture info
rc E.V.. rate control
bitstream .DV..
mb_type .DV.. macroblock (MB) type
qp .DV.. per-block quantization parameter (QP)
mv .DV.. motion vector
dct_coeff .DV..
skip .DV..
startcode .DV..
pts .DV..
er .DV.. error recognition
mmco .DV.. memory management control operations (H.264)
bugs .DV..
vis_qp .DV.. visualize quantization parameter (QP), lower QP are tinted greener
vis_mb_type .DV.. visualize block types
buffers .DV.. picture buffer allocations
-vismv <int> .DV.. visualize motion vectors (MVs)
pf .DV.. forward predicted MVs of P-frames
bf .DV.. forward predicted MVs of B-frames
bb .DV.. backward predicted MVs of B-frames
-mb_qmin <int> E.V.. obsolete, use qmin
-mb_qmax <int> E.V.. obsolete, use qmax
-cmp <int> E.V.. full pel me compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5/3 wavelet, only used in snow
w97 E.V.. 9/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-subcmp <int> E.V.. sub pel me compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5/3 wavelet, only used in snow
w97 E.V.. 9/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-mbcmp <int> E.V.. macroblock compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5/3 wavelet, only used in snow
w97 E.V.. 9/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-ildctcmp <int> E.V.. interlaced dct compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5/3 wavelet, only used in snow
w97 E.V.. 9/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-dia_size <int> E.V.. diamond type & size for motion estimation
-last_pred <int> E.V.. amount of motion predictors from the previous frame
-preme <int> E.V.. pre motion estimation
-precmp <int> E.V.. pre motion estimation compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5/3 wavelet, only used in snow
w97 E.V.. 9/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-pre_dia_size <int> E.V.. diamond type & size for motion estimation pre-pass
-subq <int> E.V.. sub pel motion estimation quality
-me_range <int> E.V.. limit motion vectors range (1023 for DivX player)
-ibias <int> E.V.. intra quant bias
-pbias <int> E.V.. inter quant bias
-coder <int> E.V..
vlc E.V.. variable length coder / huffman coder
ac E.V.. arithmetic coder
raw E.V.. raw (no encoding)
rle E.V.. run-length coder
deflate E.V.. deflate-based coder
-context <int> E.V.. context model
-mbd <int> E.V.. macroblock decision algorithm (high quality mode)
simple E.V.. use mbcmp (default)
bits E.V.. use fewest bits
rd E.V.. use best rate distortion
-sc_threshold <int> E.V.. scene change threshold
-lmin <int> E.V.. min lagrange factor (VBR)
-lmax <int> E.V.. max lagrange factor (VBR)
-nr <int> E.V.. noise reduction
-rc_init_occupancy <int> E.V.. number of bits which should be loaded into the rc buffer before decoding starts
-inter_threshold <int> E.V..
-flags2 <flags> EDVA.
fast E.V.. allow non spec compliant speedup tricks
sgop E.V.. strictly enforce gop size
noout E.V.. skip bitstream encoding
local_header E.V.. place global headers at every keyframe instead of in extradata
bpyramid E.V.. allows B-frames to be used as references for predicting
wpred E.V.. weighted biprediction for b-frames (H.264)
mixed_refs E.V.. one reference per partition, as opposed to one reference per macroblock
dct8x8 E.V.. high profile 8x8 transform (H.264)
fastpskip E.V.. fast pskip (H.264)
aud E.V.. access unit delimiters (H.264)
skiprd E.V.. RD optimal MB level residual skipping
ivlc E.V.. intra vlc table
drop_frame_timecode E.V..
non_linear_q E.V.. use non linear quantizer
reservoir E..A. use bit reservoir
-error <int> E.V..
-antialias <int> .DV.. MP3 antialias algorithm
auto .DV..
fastint .DV..
int .DV..
float .DV..
-qns <int> E.V.. quantizer noise shaping
-threads <int> EDV..
-mb_threshold <int> E.V.. macroblock threshold
-dc <int> E.V.. intra_dc_precision
-nssew <int> E.V.. nsse weight
-skip_top <int> .DV.. number of macroblock rows at the top which are skipped
-skip_bottom <int> .DV.. number of macroblock rows at the bottom which are skipped
-profile <int> E.VA.
unknown E.VA.
aac_main E..A.
aac_low E..A.
aac_ssr E..A.
aac_ltp E..A.
-level <int> E.VA.
unknown E.VA.
-lowres <int> .DV.. decode at 1= 1/2, 2=1/4, 3=1/8 resolutions
-skip_threshold <int> E.V.. frame skip threshold
-skip_factor <int> E.V.. frame skip factor
-skip_exp <int> E.V.. frame skip exponent
-skipcmp <int> E.V.. frame skip compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5/3 wavelet, only used in snow
w97 E.V.. 9/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-border_mask <float> E.V.. increases the quantizer for macroblocks close to borders
-mblmin <int> E.V.. min macroblock lagrange factor (VBR)
-mblmax <int> E.V.. max macroblock lagrange factor (VBR)
-mepc <int> E.V.. motion estimation bitrate penalty compensation (1.0 = 256)
-skip_loop_filter <int> .DV..
none .DV..
default .DV..
noref .DV..
bidir .DV..
nokey .DV..
all .DV..
-skip_idct <int> .DV..
none .DV..
default .DV..
noref .DV..
bidir .DV..
nokey .DV..
all .DV..
-skip_frame <int> .DV..
none .DV..
default .DV..
noref .DV..
bidir .DV..
nokey .DV..
all .DV..
-bidir_refine <int> E.V.. refine the two motion vectors used in bidirectional macroblocks
-brd_scale <int> E.V.. downscales frames for dynamic B-frame decision
-crf <float> E.V.. enables constant quality mode, and selects the quality (x264)
-cqp <int> E.V.. constant quantization parameter rate control method
-keyint_min <int> E.V.. minimum interval between IDR-frames (x264)
-refs <int> E.V.. reference frames to consider for motion compensation (Snow)
-chromaoffset <int> E.V.. chroma qp offset from luma
-bframebias <int> E.V.. influences how often B-frames are used
-trellis <int> E.VA. rate-distortion optimal quantization
-directpred <int> E.V.. direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
-complexityblur <float> E.V.. reduce fluctuations in qp (before curve compression)
-deblockalpha <int> E.V.. in-loop deblocking filter alphac0 parameter
-deblockbeta <int> E.V.. in-loop deblocking filter beta parameter
-partitions <flags> E.V.. macroblock subpartition sizes to consider
parti4x4 E.V..
parti8x8 E.V..
partp4x4 E.V..
partp8x8 E.V..
partb8x8 E.V..
-sc_factor <int> E.V.. multiplied by qscale for each frame and added to scene_change_score
-mv0_threshold <int> E.V..
-b_sensitivity <int> E.V.. adjusts sensitivity of b_frame_strategy 1
-compression_level <int> E.VA.
-use_lpc <int> E..A. sets whether to use LPC mode (FLAC)
-lpc_coeff_precision <int> E..A. LPC coefficient precision (FLAC)
-min_prediction_order <int> E..A.
-max_prediction_order <int> E..A.
-prediction_order_method <int> E..A. search method for selecting prediction order
-min_partition_order <int> E..A.
-max_partition_order <int> E..A.
-timecode_frame_start <int> E.V.. GOP timecode frame start number, in non drop frame format
-request_channels <int> .D.A. set desired number of audio channels
-drc_scale <float> .D.A. percentage of dynamic range compression to apply
-channel_layout <int64> ED.A.
-request_channel_layout <int64> .D.A.
-rc_max_vbv_use <float> E.V..
-rc_min_vbv_use <float> E.V..
-ticks_per_frame <int> EDVA.
AVFormatContext AVOptions:
-probesize <int> .D...
-muxrate <int> E.... set mux rate
-packetsize <int> E.... set packet size
-fflags <flags> ED...
ignidx .D... ignore index
genpts .D... generate pts
-track <int> E.... set the track number
-year <int> E.... set the year
-analyzeduration <int> .D... how many microseconds are analyzed to estimate duration
-cryptokey <binary> .D... decryption key
-indexmem <int> .D... max memory used for timestamp index (per stream)
-rtbufsize <int> .D... max memory used for buffering real-time frames
-fdebug <flags> ED... print specific debug info
ts ED...
SWScaler AVOptions:
-sws_flags <flags> E.V.. scaler/cpu flags
fast_bilinear E.V.. fast bilinear
bilinear E.V.. bilinear
bicubic E.V.. bicubic
experimental E.V.. experimental
neighbor E.V.. nearest neighbor
area E.V.. averaging area
bicublin E.V.. luma bicubic, chroma bilinear
gauss E.V.. gaussian
sinc E.V.. sinc
lanczos E.V.. lanczos
spline E.V.. natural bicubic spline
print_info E.V.. print info
accurate_rnd E.V.. accurate rounding
mmx E.V.. MMX SIMD acceleration
mmx2 E.V.. MMX2 SIMD acceleration
3dnow E.V.. 3DNOW SIMD acceleration
altivec E.V.. AltiVec SIMD acceleration
bfin E.V.. Blackfin SIMD acceleration
full_chroma_int E.V.. full chroma interpolation
full_chroma_inp E.V.. full chroma input
bitexact E.V..
Well, I'll be. I like that. Much quicker than using kino or lives, etc. But no real luck on slowing it down to a smooth frame rate. photobucket.com/albums/l204/frog8877/ thats the vid. Its already playing at 8fps, and the bit rate is "n/a"
ffmpeg -i /media/storage/desktop\ vids/test-0000.mpeg -b 64k -r 4 /media/storage/desktop\ vids/test0001.flv
Is that right? I have 2 copies of this vid, One plays at 24fps and one at 8 fps, w/ no diff in the speed, both look like there playing in ffw. I am trying to modify the one at 24, but after its done, its not changing the fps and the bitrate is still n/a
I forgot...Can you dub a mp3 file into the vid with that?
Yes you can. I think there are options to do a bit of time-stretching as well, so what seems like ffw can be slowed down to more reasonable speeds. You can certainly adjust the frame rate.Quote:
Originally Posted by Frylock2009
I have used wink Wink - [Homepage]
In Fedora 7. It is quite easy to work.
But trying with latest linux distros,not working. You can giva a try.
Cool beans...I'll be playing around w/ this for a while, figuring my way around the command lines. And as far as wink goes, Tends to freez everything with cf running, but hav'nt tried w/out cf, so not really sure thats the problem. I can record about 10 sec's worth untill everything locks up. So fay my best results came from xvidcap. And I cant seem to figure out how to record in "normal" speed.
With the -newaudio option. Do I just add the path of the mp3 I want to add before the output file?
ffmpeg -i /media/storage/desktop\ vids/Compiz.avi -newaudio /media/storage/mysharedfolder/metallica-unknown-orion.mp3 /media/storage/desktop\ vids/Compiz3.mpeg
"At least one output file must be specified" ??? Converted just fine to the mpeg without the "-newaudio" switch.