[FFmpeg-user] mp4 splitting and concatenating process

[Hans Emmanuel]

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
*Project Manager (Linux Infrastructure Management)*
 *Email* :  hans at sparksupport.com   *|*   *Skype* :  sparkhans
<http://www.sparksupport.com/> <http://www.sparkmycloud.com/>
<https://www.facebook.com/sparksupport>
<http://www.linkedin.com/company/244846>  <https://twitter.com/sparksupport>
3rd Floor, Leela Infopark, Phase -2,Kakanad, Kochi-30, Kerala, India
*Phone*:+91 484 6561696 , *Mobile*:91-9744167260.   *Confidentiality
Notice:* Information in this e-mail is proprietary to SparkSupport. and is
intended for use only by the addressed, and may contain information that is
privileged, confidential or exempt from disclosure. If you are not the
intended recipient, you are notified that any use of this information in
any manner is strictly prohibited. Please delete this mail & notify us
immediately at info at sparksupport.com