Audio drops/stops after rewind/backwards jump in TS

Hi everybody!

This is my first bug report so please try not to be too hard on me, especially since I am not speaking English natively.

As the title already tries to tell the bug is about audio output. I am watching a lot of recorded DVB-T material. Since the update of version 2.2.0 (Windows) playback of audio drops/stops every time I rewind. It does not make any difference whether I use the “Very short backwards jump”, the “Short backwards jump” (and so on) or if I jump to any previous time using the time line. The audio does not come back by itself. But I have noticed two ways of getting the audio track back:

1. Jump forward (in any way)
2. Turn off the current audio track and switch back on

The DVB-T material is a transport stream (.ts file) with an mpeg 1/2 video stream (mpgv) and an mpeg audio layer 1/2 (mpga) with a sample rate of 48 kHz and a bit rate of 192 kb/s. I am able to reproduce the behavior with any .ts file on my hard drive. Other files such as .mkv, .avi, .flv with other video and audio streams than mpga do not seem to be affected. I know there are sync issues with .ts files from DVB-T records since audio and video are often not synced after you cut the files. But the problem occurred firstly with version 2.2.0 (except for the same problem with vlc on Android).

I used the “Messages Window” to record some errors. The content is generated by pressing the following buttons:

1. Play
2. Step backward
3. (wait a little)
4. Step forward
5. Pause

I am using the following configuration: Windows 7 x64 6.1.7601 VLC version 2.2.0 Realtek High Definition Audio (driver version 6.0.1.7040) nVidia GeForce GTX 970 (driver version 347.25) If you need additional information just let me know.

I set the bug severity to "normal" since I do not know if "major" would be appropriate. I do now know what priority to give the ticket.

Contend of the "Message Window" when reproducing the bug

Added attachment:

• vlc_audio_stops_on_rewind.txt

I hope somebody might find my description helpful and fix this issue.

assigned to @fcartegnie

changed title from Audio drops/stops after rewind/backwards jump to Audio drops/stops after rewind/backwards jump in TS

added Component::Demuxers: TS label

changed milestone to %2.2.1

Replying to [comment:1 Zesis]:

I hope somebody might find my description helpful and fix this issue. #12871 (closed) was one (incomplete) attempt?

I set the bug severity to "normal" since I do not know if "major" would be appropriate. I do now know what priority to give the ticket. '' If you have a high priority issue, you must provide a patch yourself, or arrange for someone to do so.''

That's still the global audio mute on rewind problem.

core error: Could not convert timestamp 1332544922

This was not happening before.

I can confirm this bug and add that in VLC 2.1.5 this bug does not exist.

After I upgrade to VLC 2.2.0 the bug appears. When I downgrade it disappears.

When I use rewind (go back) by x minutes in a video stream, the audio stop playing completely and it never resumes playing. The video is playing correctly.

File details: source: cable TV non-HD container: TS audio stream: MPEG Audio layer 1/2 (mpga), stereo, 192 kb/s, 48 kHz

OS: Windows 7 x64 SP1

Please share logs.

If you're talking to me - I have no logs.

Ok "work not started" = if anybody needs a fix - back to VLC 2.1.5 forever. http://download.videolan.org/pub/videolan/vlc/2.1.5/

But be warned: there is another bug -- downgrade won't work. You need to uninstall current, quit installer, and then install 2.1.5.

input_clock_ConvertTS in src/input/clock.c

input_clock_ConvertTS is the effect, not the cause

problems at input_clock_ConvertTS level means PCR is not correct/set.

330c495ac660e1851324a959a3146032f66e8c70 is the first bad commit

commit 330c495ac660e1851324a959a3146032f66e8c70 Author: Tristan Matthews tmatth@videolan.org Date: Sat Nov 8 13:04:10 2014 -0500

codec: mpeg_audio: fix pts update

Fixes [#12722](https://code.videolan.org/videolan/vlc/-/issues/12722)

(cherry picked from commit 72b03859fd8b715d9baeb5b378170d81517b01e8)

added Status::fixed + 1 deleted label

closed

mentioned in issue #14089 (closed)