OBS / VLC Video Source has a problem when used long term.

dmemphis

Member
We are finding that long term looped playback of material eventually starts having hesitations on
the decklink mini monitor playout. Restarting VLC restores the quality of playback.
We are playing sports videos at 720P 10kbps from a file server over 100mb Ethernet
All on Windows 10. I have two archetectures playing this, AMD A10 with s/w encoding
and an Intel I5 with NVIDIA GT 710 with hardware encoding.

I also think I see it on streaming, but its harder to tell because
the bit rate is low on the streams and the rendering on our Vaughn site is in the way too.
It could be OBS or VLC i suppose.

I might be able to isolate a bit- for instance play a single looped file without VLC and see if it happens there,
which would vindicate VLC. Also I can make sure that its not the network, ie
some kind of file system buffering in the OS.

If these don't pan out I suppose it will be a bit difficult for ya'll to reproduce so you can fix,
unless the symptoms suggest something you know might already be a potential problem
in the long term reliability in either the flow of file data through the system.

The last two log files. These may nor may not include data involving the state where
the video starts hesitating. If there isn't anything here interesting I'll make it a point
to be sure I have the correct log associated with the hesitation.
 

dmemphis

Member
If anyone can suggest something based on logfile, looks related to audio buffering being added?
 

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dmemphis

Member
I've done some reading in the windows support forum related to audio and looked at my log file.
Audio delay added (reported in the log files) is usually pointed to as the cause of sync drift, and audio delay appears to be added to compensate for dropped frames.
Is this audio delay also added to the Decklink output? That in my mind would not be the right
thing to do. It should be on the stream only.
On the other hand, there are reports from audio sync drift in situations where streaming is not even being used. That means impact from streaming and resulting dropped frames is not alswas the reason for audio sync drift.
 
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