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I have movie split in many parts with duration 10-30 seconds. All movies are MPEG TS files. I want to merge them.

I try to make following:

 ffmpeg -f concat -i join.txt OUTPUT.TS

and

ffmpeg -i "concat:INPUT-1|INPUT-2" -c copy OUTPUT.TS

both methods do the job, but resulting movie has issue if click somewhere forward or backward. Movie freeze, audio goes well and then it starts video. I suppose I should restore or create some additional frames to make movie smooth.

What parameters should be passed to make result movie smooth with the same quality ?

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What parameters should be passed to make result movie smooth with the same quality ?

You probably need to regenerate the timestamps. Each clip has a separate timestamp stream, so when you concatenate them, the player perceives time as going backwards whenever it jumps from one part of the stream into a different one that was originally part of a different TS file.

Try adding -fflags +genpts in there, just before the output file name.

Incidentally, you want -c copy with the first command form as well. Otherwise, it may reencodes the files along the way.

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  • Now, vide do not hangs up and almost smoothly. <br>but if I do not add -c copy, then all fine except video quality. How to reencode with same quality?
    – Grous
    Commented Jan 12, 2017 at 9:10
  • @Grous: That's a separate question, and it's a duplicate besides. Use ffprobe to find out what your current video encoding parameters are, then use those same parameters or higher ones.
    – Warren Young
    Commented Jan 12, 2017 at 19:41

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