Concatenate TS files with correct timestamps
I'm trying to merge multiple ts chunk files to one single file, without any loss of quality or reencoding. The files are taken from a live stream, however I'm trying to merge them in a diffrent order and not the order they were streamed.
Example of files:
0000000033.ts
0000000034.ts
0000000039.ts
0000000044.ts
I tried:
cat 0000000033.ts 0000000034.ts 0000000039.ts 0000000044.ts >combined.ts
and
ffmpeg -i "concat:0000000033.ts|concat:0000000034.ts|concat:0000000039.ts|concat:0000000044.ts" -c copy -bsf:a aac_adtstoasc output.mp4
This kinda works, however I instead of beeing 4 seconds long it's around 15. It plays this way:
[first 2 clips]
[5 secs pause]
[39.ts]
[5 secs pause]
[44.ts]
[done]
This happens to both the cat and ffmpeg combined version. So it seems the ts chunks contain timestamps from the stream that are beeing used.
How can I fix that to make it one continous clip?
The chunks here are more of an example, the chunks will be dynamically selected.
Answer
Haven't checked whether this works with the concat protocol, but you need to generate a new set of timestamps.
ffmpeg -i "concat:0000000033.ts|0000000034.ts|0000000039.ts|0000000044.ts" \
-c copy -bsf:a aac_adtstoasc -fflags +genpts output.mp4