ffmpeg -i '/адрес/видео.mpeg' -vcodec flv -f flv -r 29.97 -s 320x240 -aspect 4:3 -g 160 -cmp dct -subcmp dct -mbd 2 -flags +aic+cbp+mv0+mv4 -trellis 1 -ac 1 -ar 22050 '/адрес/видео.flv'

совсем маленький
ffmpeg -i '/адрес/видео.mpeg' -vcodec flv -f flv -r 29.97 -s 320x180 -aspect 16:9 -b 160 -cmp dct -subcmp dct -mbd 2 -flags +aic+cbp+mv0+mv4 -trellis 1 -ac 1 -ar 22050 '/адрес/видео.flv'

из wmv в flv
ffmpeg -i '/адрес/видео.wmv' -vcodec flv -f flv -r 29.97 -s 320x240 -aspect 4:3 -g 160 -cmp dct -subcmp dct -mbd 2 -flags +aic+cbp+mv0+mv4 -trellis 1 -ac 1 -ar 22050 '/адрес/видео.flv'


в wmv Web Use(Microcoft)
ffmpeg -i '/адрес/видео.mpeg' -vcodec wmv2 -acodec wmav2 -r 29.97 -s 320x240 '/адрес/видео.wmv'

в wmv Generic(wmv2)(Microcoft)
ffmpeg -i '/адрес/видео.mpeg' -vcodec wmv2 -acodec wmav2 -r 25 '/адрес/видео.wmv'

в wmv Zune (Microcoft)
ffmpeg -i '/адрес/видео.mpeg' -vcodec wmv2 -acodec wmav2 -r 23.97 -s 320x240 '/адрес/видео.wmv'

в wmv Xbox 360 (Microcoft)
ffmpeg -i '/адрес/видео.mpeg' -vcodec wmv2 -acodec wmav2 -r 25 -s 720x480 '/адрес/видео.wmv'

в wmv Power Point (Microcoft)
ffmpeg -i '/адрес/видео.mpeg' -vcodec wmv2 -acodec wmav2 -aspect 4:3 -ac 1 -ar 22050 -s 320x240 '/адрес/видео.wmv'

DV NTSC (Kino)
ffmpeg -i '/адрес/видео.mpeg' -target ntsc-dv -aspect 4:3 -f dv '/адрес/видео.dv'

DV PAL (Kino)
ffmpeg -i '/адрес/видео.mpeg' -target pal-dv -aspect 4:3 -f dv '/адрес/видео.dv'

VCD NTSC
ffmpeg -i '/адрес/видео.mpeg' -f vcd -target ntsc-vcd -mbd rd -trellis -mv0 -cmp 0 -subcmp 2 '/адрес/видео.mpg'

VCD PAL
ffmpeg -i '/адрес/видео.mpeg' -f vcd -target pal-vcd -mbd rd -trellis -mv0 -cmp 0 -subcmp 2 '/адрес/видео.mpg'

в Аудио

wma
ffmpeg -i '/адрес/видео.mpeg' -vn -acodec wmav2 -ab 160kb '/адрес/аудио.wma'

wav for CD
ffmpeg -i '/адрес/видео.mpeg' -vn -ar 44100 '/адрес/аудио.wav'

ogg
ffmpeg -i '/адрес/видео.mpeg' -acodec vorbis -aq 60 -vn -ac 2 '/адрес/аудио.ogg'

#################################################################################

https://linuxconfig.org/ffmpeg-audio-format-conversions

WAV - Waveform Audio File Format

wav to mp3

Convert wav to mp3 with ffmpeg:

ffmpeg -i audio.wav -acodec libmp3lame audio.mp3
wav to ogg

Convert wav to ogg with ffmpeg:

ffmpeg -i audio.wav -acodec libvorbis audio.ogg
wav to aac

Convert wav to acc with ffmpeg:

ffmpeg -i audio.wav -acodec libfaac audio.aac
wav to ac3

Convert wav to ac3 with ffmpeg:

ffmpeg -i audio.wav -acodec ac3 audio.mp3
OGG - Free, open standard container

ogg to mp3

Convert ogg to mp3 with ffmpeg:

ffmpeg -i audio.ogg -acodec libmp3lame audio.mp3
ogg to wav

Convert ogg to wav with ffmpeg:

ffmpeg -i audio.ogg audio.wav
ogg to aac

Convert ogg to aac with ffmpeg:

ffmpeg -i audio.ogg -acodec libfaac audio.aac
ogg to ac3

Convert ogg to ac3 with ffmpeg:

ffmpeg -i audio.ogg -acodec ac3 audio.ac3
AC3 - Acoustic Coder 3

ac3 to mp3

Convert ac3 to mp3 with ffmpeg:

ffmpeg -i audio.ac3 -acodec libmp3lame audio.mp3
ac3 to wav

Convert ac3 to wav with ffmpeg:

ffmpeg -i audio.ac3 audio.wav
ac3 to aac

Convert ac3 to aac with ffmpeg:

ffmpeg -i audio.ac3 -acodec libfaac audio.aac
ac3 to ogg

Convert ac3 to ogg with ffmpeg:

ffmpeg -i audio.ac3 -acodec libvorbis audio.ogg
AAC - Advanced Audio Coding

aac to mp3

Convert aac to mp3 with ffmpeg:

ffmpeg -i audio.aac -acodec libmp3lame audio.mp3
aac to wav

Convert aac to wav with ffmpeg:

ffmpeg -i audio.aac audio.wav
aac to ac3

Convert aac to ac3 with ffmpeg:

ffmpeg -i audio.aac -acodec ac3 audio.ac3
aac to ogg

Convert aac to ogg with ffmpeg:

ffmpeg -i audio.aac -libvorbis audio.ogg

Руководство по FFmpeg libav

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