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• Is their any way to split video into multiple segment using ffmpeg in android ?

  22 janvier 2020, par Ayaz Qureshi

  I want to trim video into 30 seconds multiple segments in android studio.I have used the following command to trim video into 30 seconds but this is not the way i want,its just trimming video into 30 sec.Is there any FFmpeg command available to split video into multiple segments in android studio of specific duration like 30 secs ?

• split video (avi/h264) on keyframe

  30 novembre 2012, par m.sr

  Hallo.

  I have a big video file. ffmpeg, tcprobe and other tool say, it is an h264-stream in an AVI-container.

  Now i'd like to cut out small chunks form the video.

  1. Problem : The index of the video seam corrupted/destroyed. I kind of fixed this via mplayer -forceidx -saveidx <indexfile> <bigvideofile></bigvideofile></indexfile>. The Problem here is, that I'm now stuck with mplayer/mencoder which can use this index file via -loadidx <indexfile></indexfile>. I have tried correcting the index like described in man aviindex (mplayer -frames 0 -saveidx mpidx broken.avi ; aviindex -i mpidx -o tcindex ; avimerge -x tcindex -i broken.avi -o fixed.avi), but this didn't fix my video - meaning that most tools i've tested couldn't search in the video file.

  2. Problem : I cut out parts of the video via following command : mencoder -loadidx in.idx -ss 8578 -endpos 20 -oac faac -ovc x264 -sws 9 -lavfopts format=mp4 -x264encopts <lotsofopts> -of lavf -vf scale=800:-10,harddup in.avi -o out.mp4</lotsofopts>. Now here the problem is, that some videos are corrupted at the beginning. I think this is because the fact, that i do not necessarily cut at keyframe.

  Questions :

  1. What is the best way to fix the index of an avi "inline" so that every tool can again work as expected with it ?

  2. How can i split at the keyframes ? Is there an mencoder-option for this ?

  3. Are Keyframes coming in a frequency ? How to find out this frequency ? (So with a bit of math it should be possible to calculate the next keyframe and cut there)

  4. Is ther perhaps some completely other way to split this movie ? Doing it by hand is no option, i've to cut out 1000+ chunks ...

  Thanks a lot !

• Ffmpeg Windows split 1 video to chunks with random length (no re-encode)

  24 janvier 2021, par Anna Lone

  I have 1 big video file and I need to split it to random length chunks without re-encode.

  


  For example chunks from 130 to 240 seconds.

  


  For windows ffmpeg

  


  Tried this and. Nothing in output folder.

  


  $ times=$(ruby -e 's=[]; d=0; while d < 150 do t=rand(15..50); s << (d+t); d=d+t end; puts s.join(",")')
$ echo $times
15,53,96,124,168
$ ffmpeg -i lutherceleb.mp4 -f segment -segment_times $times -c copy -reset_timestamps 1 -map 0 OUTPUT%d.mp4