yt-dlp fixupm3u8

[whs912km]

yt-dlp have a fixupm3u8 feature to fixing MPEG-TS in MP4 container when download video mp4
but is there a way to use this feature even on videos not downloaded from yt-dlp?
if i have a video.mp4 downloaded with IDM or N_m3u8DL-RE i can to use this fix with yt-dlp on a video that has already been downloaded? how to?

[noweleger]

You can find the answer to your question in the [debug] section at the end of the download when yt-dlp does [FixUpM3u8]
As you can see, it just calls ffmpeg with the only parameter needed for fixing MPEG-TS in MP4.
So, you do not need to use yt-dlp for fixing MPEG-TS in existing file, ffmpeg will do this perfectly with following command:

ffmpeg -i video.mp4 -movflags +faststart -vcodec copy -acodec copy -absf aac_adtstoasc output.mp4

[whs912km]

@ noweleger

after over 1 year, i can see your post today only ...! sorry for that

anyway nice to know. a big thanks for your reply, very useful

[whs912km]

mmm ...

i have downloaded a simply video file .ts, no encrypted, from m3u8 link, audio+video, with N_m3u8DL-RE
if i can check error with ffmpeg i've this:

[mpegts @ 0000000000422e40] start time for stream 2 is not set in estimate_timings_from_pts

so, run command from post#2 to try solve this error, i have:

[mpegts @ 00000000005441c0] start time for stream 2 is not set in estimate_timings_from_pts
Input #0, mpegts, from 'master_2023-10-99.ts':
  Duration: 00:50:12.88, start: 0.101000, bitrate: 1877 kb/s
  Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 852x720 [SAR 640:639 DAR 16:9], 24 fps, 24 tbr, 90k tbn
  Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 169 kb/s
  Stream #0:2[0x102]: Data: timed_id3 (ID3  / 0x20334449)
Output #0, mpegts, to 'master_2023-10-99_ok.ts':
  Metadata:
    encoder         : Lavf60.15.101
  Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 852x720 [SAR 640:639 DAR 16:9], q=2-31, 24 fps, 24 tbr, 90k tbn
  Stream #0:1: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 169 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[mpegts @ 0000000003188b40] AAC bitstream not in ADTS format and extradata missing
    Last message repeated 201 times
[mpegts @ 0000000003188b40] AAC bitstream not in ADTS format and extradata missing
    Last message repeated 173 times
[mpegts @ 0000000003188b40] AAC bitstream not in ADTS format and extradata missing
    Last message repeated 211 times
[mpegts @ 0000000003188b40] AAC bitstream not in ADTS format and extradata missing
    Last message repeated 211 times
[mpegts @ 0000000003188b40] AAC bitstream not in ADTS format and extradata missing

tried also same code above but without '-absf aac_adtstoasc'
here no error like '[mpegts @ 0000000003188b40] AAC bitstream not in ADTS format and extradata missing'
but the final video (master_2023-10-99_ok.ts) have same issue:

[mpegts @ 0000000000422e40] start time for stream 2 is not set in estimate_timings_from_pts

[lomero]

try with yt-dlp
i think fixupm3u8 utility solve your issue

[whs912km]

yep, with yt-dlp no issue
my problem is only when download some video (not everythings, only video with Data: timed_id3 (ID3 / 0x20334449) with N_m3u8DL-RE

i think it's problem with RE and ffmpeg on binary merge

[lomero]

try to use simply '-c copy' flag in ffmpeg to solve your issue

ffmpeg -i video.ts -c copy video_2.ts

or also try this one_

ffmpeg -i video.ts -c:v copy -c:a:0 video_2.ts