Linux. Programs. ffmpeg
ffmpeg -r 60 -g 600 -s 1680x1050 -f x11grab -i :0.0 -s 800x600 -vcodec qtrle screencast.mov
- 1-f x11grab - брать поток с экрана
- 2-r 60 - 60 кадров
- 3-s 1680x1050 - моё разрешение экрана
- 4-i :0.0 - в качестве источника мой экран
- 5-vcodec qtrle - кодек,
- 6-s 800x500 - получаемое разрешение
- 7-screencast.mov - выходной файл
Режет, конвертирует, например mkv в avi.
Установка:
sudo apt-get install ffmpeg
Пример порезки видео:
ffmpeg -ss 00:01:30 -t 00:00:15 -i video_in.mov -vcodec copy video_out.mov
- -ss - откуда резать
- -t - сколько резать
- -vcodec copy - не перекодировать (должно стоять после исходного файла)
- -аcodec copy - пробовал, убрало звук
Без звука (-an):
ffmpeg -ss 00:00:00 -t 00:00:05 -i video.mp4 -vcodec copy -an video_out.mp4
Пример порезки mp3:
ffmpeg -acodec copy -ss 00:00:50 -t 00:00:30 -i /home/ans/music_in.mp3 /home/ans/music_out.mp3
Основные параметры
-f fmt – формат в который происходит конвертация
-i filename – имя входящего файла (который будет конвертироваться)
-y – перезаписать полученный после конвертации файл(ы). Глобальный параметр, должен быть определен в начале.
Видео параметры:
-b bitrate – битрейт видео
-r fps – установить частоту кадров (по умолчанию 25)
-s size – установить размер кадра
- ‘qvga’ 320×240
- ’sxga’ 1280×1024
-target type - specify target file type (“vcd”, “svcd”, “dvd”, “dv”, “dv50”, “pal-vcd”, “ntsc-svcd”, …)
Аудио параметры
-ar freq – установить частоту аудио
-ac channels – установить количество аудио каналов.
-acodec codec – установить аудио кодек (алиас для -codec:a)
Дополнительные
-vhook – плагин для создания вотермарки
пример использования:
-vhook ‘/usr/local/lib/vhook/imlib2.so -x W-w -y H-h -i /watermark.gif’
Пример:
ffmpeg -y -i /var/video/input_file.mp4 -acodec libfaac -ac 1 -b 225k -s 320x240 -r 25 -ar 22050 -vhook ‘/usr/local/lib/vhook/imlib2.so -x W-w -y H-h -i /watermark.gif’ -f flv /var/video/output_file.flv
Примеры использования
Показать информацию по файлу:
ffmpeg -i sample.avi
Кроме того, для получения информации следует использовать
ffprobe video.avi
Так же ffprobe поддерживает несколько форматов для вывода информации ini, json, xml
ffprobe -v 0 video.avi -print_format json -show_format ffprobe -v 0 video.avi -print_format xml -show_format ffprobe -v 0 video.avi -print_format ini -show_format
Превратить набор картинок в видео
ffmpeg -f image2 -i image%d.jpg video.mpg
Эта команда преобразует все картинки из текущей директории (названные image1.jpg, image2.jpg и т.д.) в видеофайл video.mpg
(примечание переводчика) мне больше нравится такой формат:
ffmpeg -r 12 -y -i “image_%010d.png” output.mpg
здесь задаётся frame rate (12) для видео, формат «image_%010d.png» означает, что картинки будут искаться в виде image_0000000001.png, image_0000000002.png и тд, то есть, в формате printf)
будет кадр в секунду. Параметр -r указывает нужный frame rate:
ffmpeg -r 1 -y -i “image_%010d.png” output.mpg
Можно ставить дробное: -r 0.1 даст кадр в 10 секунд.
Разложение видеоряда на кадры:
ffmpeg -i video.mpg image%d.jpg
Будут сгенерированы файлы image1.jpg, image2.jpg и т.д… Поддерживаемые графические форматы: PGM, PPM, PAM, PGMYUV, JPEG, GIF, PNG, TIFF, SGI.
Склейка 2х и более видео в один:
Если ролики в одинаковых форматах с одинаковыми параметрами:
| ffmpeg -i “concat:input1.mpg | input2.mpg | input3.mpg” -c copy output.mpg |
Если разные:
ffmpeg -i input1.mp4 -i input2.webm
-filter_complex ‘[0:0] [0:1] [1:0] [1:1] concat=n=2:v=1:a=1 [v] [a]’
-map ‘[v]’ -map ‘[a]’
Кодирование видеоряда для Apple iPod/iPhone:
ffmpeg -i source_video.avi input -acodec aac -ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320x180 -title X final_video.mp4
Извлечь звуковую дорожку из видео и сохранить в MP3:
ffmpeg -i source_video.avi -vn -ar 44100 -ac 2 -ab 192 -f mp3 sound.mp3
Пояснения:
- Источник: source_video.avi
- Битрейт аудио: 192kb/s
- Выходной формат: mp3
- Полученный аудиофайл: sound.mp3
Преобразование WAV в MP3:
ffmpeg -i son_original.wav -vn -ar 44100 -ac 2 -ab 192 -f mp3 son_final.mp3
Выдираем звук из видео в формате MP4 и сжимаем его в MP3:
$ cat mp4tomp3.sh
#!/bin/sh
for file in "$@" ; do
name=`echo "$file" | sed -e "s/.mp4$//g"`
ffmpeg -i "$file" -ac 2 -f wav - | lame --preset standard - "$name.mp3"
done
AVI в MPG:
ffmpeg -i video_source.avi video_final.mpg
MPG в AVI:
ffmpeg -i video_source.mpg video_final.avi
Кодирование видеоряда для Apple iPod/iPhone:
ffmpeg -i source_video.avi input -acodec aac -ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320x180 -title X final_video.mp4
Пояснения:
- Источник: source_video.avi
- Аудио кодек: aac
- Битрейт аудио: 128kb/s
- Видео кодек: mpeg4
- Битрейт видео: 1200kb/s
- Размер видео: 320 на 180 пикселей
- Полученное видео: final_video.mp4
Для Sony PSP:
ffmpeg -i source_video.avi -b 300 -s 320x240 -vcodec xvid -ab 32 -ar 24000 -acodec aac final_video.mp4
Пояснения:
- Источник: source_video.avi
- Аудио кодек: aac
- Битрейт аудио: 32kb/s
- Видео кодек: xvid
- Битрейт видео: 1200kb/s
- Размер видео: 320 на 180 пикселей
- Полученное видео: final_video.mp4
Конвертация AVI-файла в несжатый анимированный GIF:
ffmpeg -i video_source.avi gif_anime.gif
Смешение аудио- и видеопотока в один результирующий файл:
ffmpeg -i son.wav -i video_source.avi video_final.mpg
Преобразование AVI в FLV:
ffmpeg -i video_source.avi -ab 56 -ar 44100 -b 200 -r 15 -s 320x240 -f flv video_final.flv
FLV в AVI:
ffmpeg -i video_source.flv -ab 56 -ar 44100 -b 200 -s 320x240 video_final.avi
FLAC в MP3:
ffmpeg -i audio_original.flac -ab 320k -ac 2 -ar 48000 audio_final.mp3
Конвертировать .avi в mpeg для DVD-плееров
ffmpeg -i source_video.avi -target pal-dvd -ps 2000000000 -aspect 16:9 finale_video.mpeg
Пояснения:
Выходной формат: pal-dvd Максимальный размер для выходного файла: 2000000000 (2 Gb) Широкоэкранный формат: 16:9
Сжать .avi в DivX
ffmpeg -i video_origine.avi -s 320x240 -vcodec msmpeg4v2 video_finale.avi
Сжать OGG Theora в mpeg DVD
ffmpeg -i film_sortie_cinelerra.ogm -s 720x576 -vcodec mpeg2video -acodec mp3 film_termin.mpg
Сжать .avi в SVCD mpeg2
Формат NTSC:
ffmpeg -i video_origine.avi -target ntsc-svcd video_finale.mpg
Формат PAL:
ffmpeg -i video_origine.avi -target pal-svcd video_finale.mpg
Сжать .avi в VCD mpeg2
Формат NTSC:
ffmpeg -i video_origine.avi -target ntsc-vcd video_finale.mpg
Формат PAL:
ffmpeg -i video_origine.avi -target pal-vcd video_finale.mpg
Многопроходное кодирование с помощью ffmpeg
ffmpeg -i fichierentree -pass 2 -passlogfile ffmpeg2pass fichiersortie-2
Вырезать один кадр из видео для создания, например, превью на сайте или в админке
ffmpeg -i “file.flv” -f image2 -vframes 1 -ss 00:00:02 “file_out.jpg”
Вырезает первый кадр второй секунды из файла file.flv и сохраняет её в файле file_out.jpg.
Повернуть видео на 90°
ffmpeg -vf transpose=1 -i file.avi file1.avi
Опции transpose:
0 — против часовой стрелки и зеркально; 1 — по часовой стрелке; 2 — против часовой стрелки; 3 — по часовой стрелке и зеркально
Захват видео с экрана:
ffmpeg -f x11grab -s cif -r 25 -i :0.0+10,20 /tmp/out.mpg
здесь -s cif — размер, 0.0 — экран, 10,20 — это смещение относительно верхнего левого угла экрана
при желании можно и звук, например, с alsa или jack присобачить
Ватермарк:
ffmpeg -i in.mp4 -vfilters “movie=0:gif:logo.gif [logo]; [in][logo] overlay=10:mainH-overlayH-10:1 [out]” out.mp4
Но тут все довольно сложно. Старые версии делали ватермарки через vhook, новые делают через libavfilter. Насколько помню за последний год его то включают то выключают из-за разных багов.
http://habr.com/post/171213/
Все параметры
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
Main options:
-L show license
-h show help
-? show help
-help show help
--help show help
-version show version
-formats show available formats
-codecs show available codecs
-bsfs show available bit stream filters
-protocols show available protocols
-filters show available filters
-pix_fmts show available pixel formats
-loglevel loglevel set libav* logging level
-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
-timelimit limit set max runtime in seconds
-v number set ffmpeg 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
-fpre filename set options from indicated preset file
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
-vlang code set the ISO 639 language code (3 letters) of the current video 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
-stag fourcc/tag force subtitle tag/fourcc
-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
-wpredp <int> E.V.. weighted prediction analysis method
-hurry_up <int> .DV..
-ps <int> E.V.. rtp payload size in bytes
-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
trunc .DV.. trancated frames
-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 unofficial 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
mbtree E.V.. use macroblock tree ratecontrol (x264 only)
psy E.V.. use psycho visual optimization
ssim E.V.. ssim will be calculated during encoding
-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 <int64> 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.
-color_primaries <int> EDV..
-color_trc <int> EDV..
-colorspace <int> EDV..
-color_range <int> EDV..
-chroma_sample_location <int> EDV..
-psy_rd <float> E.V.. specify psycho visual strength
-psy_trellis <float> E.V.. specify psycho visual trellis
-aq_mode <int> E.V.. specify aq method
-aq_strength <float> E.V.. specify aq strength
-rc_lookahead <int> E.V.. specify number of frames to look ahead for frametype
AVFormatContext AVOptions:
-probesize <int> .D... set probing size
-muxrate <int> E.... set mux rate
-packetsize <int> E.... set packet size
-fflags <flags> ED...
ignidx .D... ignore index
genpts .D... generate pts
nofillin .D... do not fill in missing values that can be exactly calculated
noparse .D... disable AVParsers, this needs nofillin too
igndts .D... ingore dts
rtphint E.... add rtp hinting
-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..