Quite often audio gets out of sync when replaying a recording where scene changes. When this occurs the picture gets fully black for brief moment during the change of the scene. For example in cases where originally there was a commercial break before next scene but the broadcaster had joined scenes together, the audio problem appears.
This has been a longterm problem for me for all versions of VDR on a full featured technotrend. Is it a VDR problem or a driver problem?
This happens in the UK on a DVB-T recording when interference in the stream is prominent. After the interference causes the video to skip or distort a little then the audio can drift out of sync.
It is easy to fix (skip back and forth by a minute) but it is annoying. Is there any way to fix this (like continuously monitor the video and audio sync) in VDR?
Yes, this fixes it here too - but is annoying to have to do.
I have seen this problem reported before, but no-one seems to want to fix it or even admit there is a problem. IMHO whenever there is a glitch or issue with the video, there should be a mechanism to re-sync the video & audio - or this should just happen regularly (dropping frames etc)
I'm hoping one day this problem will be addressed, as it is now really the only serious issue that I see with VDR.
Cheers,
morfsta
Morfsta wrote:
This happens in the UK on a DVB-T recording when interference in the stream is prominent. After the interference causes the video to skip or distort a little then the audio can drift out of sync.
I have seen this problem reported before, but no-one seems to want to fix it or even admit there is a problem. IMHO whenever there is a glitch or issue with the video, there should be a mechanism to re-sync the video & audio - or this should just happen regularly (dropping frames etc)
As far as I know, this is a DVB driver issue. The DVB API seems to only synchronize audio and video on stream start, and not later on. If complete audio or video frames get dropped, then the two streams get out of sync and stay out of sync. This only affects unreliable streams, so it works quite well on most systems.
It would be quite difficult to fix such stream errors before passing the stream to DVB, so I guess this is either a driver or a firmware issue.
Cheers,
Udo