How to spillt avi video to two equal parts using ffmpeg?

[spiderMan007]

Hi all . i got and avi video that is 1:27:58 in duration. I wonder how i can splitt this video to tow parts using ffmpeg without losing quality and without transcoding?

[poisondeathray]

equal in file size or time (duration) ?

[spiderMan007]

Thanks for reply. Equal in duration!

[poisondeathray]

use -ss for start time and -t for duration

Your cuts might not be accurate unless the time lies exactly on a keyframe (there might be overlap or missing frames depending on where the cut point lies in relation to the keyframe)


e.g. from start to 44 minutes
ffmpeg -i input.avi -vcodec copy -acodec copy -t 00:44:00 output1.avi

e.g. from 44 minutes to end
ffmpeg -i input.avi -vcodec copy -acodec copy -ss 00:44:00 output2.avi

[spiderMan007]

thanks posion for help. I tried your first command and the output has no voice, only noises(video is ok) ! why this happened and how to fix it ?

[poisondeathray]

not sure, what kind of "avi" ? use mediainfo

Another option you can use vdub to cut, in direct stream copy mode . This way you can navigate by keyframes and make the cut of part 1 & 2 perfectly match by cutting on keyframes

ffmpeg wouldn't be my 1st choice to do this type of task