Bug #4240
Sporadic DTS discontinuity errors in DVB-S ts recordings
0%
Description
Some DVB-S ts recordings (15 out of 56) contain DTS discontinuity errors, leading to playback problems (when skipping forward/backward). The beginning of one example is attached. In all but one case, the errors appear in recordings where EIT p/f was used.
Such ts recordings can be fixed with a post-processing script using a line like this:
ffmpeg -v fatal -probesize 500M -analyzeduration 1000M -i "$input" -map 0 -vcodec copy -acodec copy -sn "$output"
It would be ideal if anything inside TVH could prevent this from happening in the first place.
History
Updated by Oliver O almost 8 years ago
Updated by (Upload of 200 MB failed with "Request Entity Too Large" though the hint next to the "Browse" button says "Maximum size: 488 MB".)
Providing the example here for a limited time: https://dl.dropboxusercontent.com/u/29731283/dts-discontinuity-example-1a.ts
Updated by Jaroslav Kysela almost 8 years ago
Updated by DTS/PTS is not altered by TVH when the recording is paused using the EITp/f running state detection. So yes, there may be gaps in DTS/PTS.
Updated by Oliver O almost 8 years ago
Thanks for the explanation.
Just to clarify the incidents I've experienced: Where EIT p/f was used, the program was never interrupted by commercial breaks. All recordings were scheduled with a Pre-recording padding of 5 minutes and a Post-recording padding of 15 minutes.
So it was basically the recording- starting 5 minutes before schedule, then
- receiving the running_status of
Running, - receiving the entire program without breaks, then
- receiving the running_status of
Completed.
I haven't yet looked at the details how TVH handles this, but I hope this clarification helps if at some point there is an interest to address the issue.