Difference between revisions of "Media Conversion"
From Vague Hope Wiki
| Line 71: | Line 71: | ||
| grep 'VIDEO_FPS' \ | | grep 'VIDEO_FPS' \ | ||
| cut -d '=' -f 2) | | cut -d '=' -f 2) | ||
| + | </pre> | ||
| + | |||
| + | === mplayer filters === | ||
| + | |||
| + | Detect black box border: | ||
| + | <pre> | ||
| + | mplayer [source] -chapter 3 -vf cropdetect | ||
| + | </pre> | ||
| + | |||
| + | Select audio and disable subs: | ||
| + | <pre> | ||
| + | mplayer [source] -alang ja -nosub -noautosub -forcedsubsonly -sid 1000 | ||
</pre> | </pre> | ||
| Line 87: | Line 99: | ||
* http://virishi.net/useful-video-transcoding-commands | * http://virishi.net/useful-video-transcoding-commands | ||
* https://sites.google.com/site/linuxencoding/x264-encoding-guide | * https://sites.google.com/site/linuxencoding/x264-encoding-guide | ||
| + | * http://www.mplayerhq.hu/DOCS/HTML/en/faq.html | ||
| + | * http://www.axllent.org/docs/video/mencoder_dvd_to_mpeg4 | ||
== ASCII == | == ASCII == | ||
Revision as of 14:58, 4 December 2012
Audio
aac to wav
$ mplayer -ao pcm a.aac -ao pcm:file="a.wav"
wav to mp3, mono, 192
lame -h a.wav a.mp3 lame -h -m m a.wav a.mp3 lame -h -b 192 a.wav a.mp3
fixing and info
mpg123 --rate 44100 --stereo --resync a.mp3 vbrfix a.mp3 exiftool a.mp3
extract audio from video
ffmpeg -i inputfile.flv -acodec copy output.mp3
GUI tool: soundconverter
flac to mp3
ffmpeg -i input.flac -ab 196k -ac 2 -ar 48000 output.mp3
split mp3
sudo aptitude install mp3splt-gtk mp3wrap mp3splt
Video
Tools
General guide: http://ubuntuforums.org/showthread.php?t=786095
mplayer
Transcode for Transformer. Burns in ass subs.
- mplayer from source.
- x264 from source.
- neroAacEnc binary (see 4th source),
- Ubuntu repo MP4Box.
- Need to manually supply $FRAME_RATE.
mplayer -benchmark -ass \ -vo yuv4mpeg:file=>(x264 --demuxer y4m --crf 22 \ --preset slow --profile main --level 3.1 \ --vbv-bufsize 14000 --vbv-maxrate 14000 \ --threads 2 --output video.264 - 2>x264.log) \ -ao pcm:fast:file=>(neroAacEnc \ -ignorelength -lc -q 0.6 -if - -of audio.mp4 2>nero.log) \ source.mkv MP4Box -fps $FRAME_RATE -add video.264 -add audio.mp4 final.mp4
Possible FPS detection:
FPS=$($MPLAYER -vo null -ao null -frames 0 \
-identify "$SOURCE" 2>/dev/null \
| sed -ne '/^ID_/ { s/[]()|&;<>`'"'"'\\!$" []/\\&/g;p }' \
| grep 'VIDEO_FPS' \
| cut -d '=' -f 2)
mplayer filters
Detect black box border:
mplayer [source] -chapter 3 -vf cropdetect
Select audio and disable subs:
mplayer [source] -alang ja -nosub -noautosub -forcedsubsonly -sid 1000
ffmpeg
Down-scale mp4:
ffmpeg -i source.mp4 -vcodec libx264 -vprofile main -preset slow -b:v 400k -maxrate 400k -bufsize 800k -vf scale=852:480 -threads 0 -acodec libfaac -ab 128k output.mp4
Note: can do 'scale=-1:480' to calculate width.
References
- http://www.virag.si/2012/01/web-video-encoding-tutorial-with-ffmpeg-0-9/
- http://www.catswhocode.com/blog/19-ffmpeg-commands-for-all-needs
- http://virishi.net/useful-video-transcoding-commands
- https://sites.google.com/site/linuxencoding/x264-encoding-guide
- http://www.mplayerhq.hu/DOCS/HTML/en/faq.html
- http://www.axllent.org/docs/video/mencoder_dvd_to_mpeg4
ASCII
xterm -fn 5x7 -geometry 250x80 -e "setterm -cursor off ; mplayer -quiet -vo aa:driver=curses -monitorpixelaspect 0.5 test.avi"
