> The timestamps are just increasing too fast. This is reproducible with old 
> versions of FFmpeg (back to 0.9) and I cannot play the stream at all with 
> vlc. In addition, we have a file output from another Hikvision server here > 
> that has broken timestamps so I am tending to a server issue.

That was also posted by me - same model Hikvision NVR except back then I was 
retrieving MPEG-TS stream using inner Hikvision API.

> As a work-around, you can record the stream with something else than ogg (for 
> example avi) and then re-encode that file, the result should contain sane 
> timestamps.
> If you use the option "-rtsp_transport tcp" you should not see the errors 
> that are in your console output, "-qscale 2" ensures maximum quality, you can 
> reduce the bitrate when encoding to ogg.

Tried it and while it does normalize the video duration and makes audio 
constantly heard, the audio does not match the video's time - I can see people 
talking on the video but there is only silent noise (same noise when the room 
is empty) output from the audio.  Here is a sample converted to .avi container 
and then encoded to Thora:  
https://www.dropbox.com/s/971plokoty9nc9r/out.ogg?dl=0


George A.


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