Extract audio from video using Mplayer:
- mplayer -ao pcm:file=filename.wav video.avi
Play audio while playing video:
- mplayer -audiofile file.mp3 video.avi
Using FFMpeg (-y is to overwrite file), merge audio and video:
- ffmpeg -y -i audio_to_merge.mp3 -i video_to_merge.avi -vcodec copy merged_output.avi
Merge video and audio with Mencoder:
- mencoder -oac copy -ovc lavc -lavcopts vcodec=mpeg4 video_to_merge.avi -audiofile audio_to_merge.mp3 -o merged_output.avi
From OGMTools, merge OGG Vorbis audio and Theora Video:
- ogmmerge -o merged_output.ogm audio_to_merge.ogg video_to_merge.ogv
Convert video to images using FFMpeg (24 frames a second):
- ffmpeg -i video.avi -r 24 -f image2 image%03d.jpg
