[FFmpeg-user] mp4 splitting and concatenating process

Mahesh Patade patademahesh at gmail.com
Mon Jul 6 08:35:10 CEST 2015


Please check this process

I have written this logic in my project. Check scripts.

On Mon, Jul 6, 2015 at 11:39 AM, Hans Emmanuel <hans at sparksupport.com> wrote:
> Hello all,
> I need to split mp4 files for distributed batch transcoding process. I was
> planning to split it with ffmpeg command
> *ffmpeg -i largefile.mp4 -ss 00:00:00 -t 00:05:00  -acodec copy -vcodec
> copy part1.mp4 -ss 00:05:00 -t 00:05:00  -acodec copy -vcodec copy
> part2.mp4 * etc..
> Then concatenating the part files with
> *ffmpeg -f concat -i mylist.txt -c copy final.mp4*    where mylist.txt
> contains the part files locations. But the final video seems hanging for a
> bit of second at the joining points. I  have tried the other method with
> mpegts.
> first I split converted to mpegts with
> *ffmpeg -i file.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts file_mpegts.ts*
> Then I split mpegts to part files with the first ffmpeg command and
> finally I concatenated part files with
> *ffmpeg -i "concat:part1.ts|part2.ts" -c copy -bsf:a aac_adtstoasc
> file_final.mp4*  . But in this method also, the above mentioned
>  problem is there. Am I using the correct commands/ method? Please
> share your thoughts for a smooth concatenation.
> --
>    Warm Regards,  Hans Emmanuel
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Best Regards,
Mahesh Patade
Mob. No. +91-97735-80660

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