RTP streaming 720p 60 fps: AV sync mismatch

[kushakyal]

I am doing live streaming of h.264 and AAC elementary streams to VLC on Windows through RTP/RTSP protocol using live555 server.

After running for about 5 hours, the AV sync goes off.
The configurations for Video are 720p, 60fps, H.264 encoding.

I have tried this with both the latest version as well as version 1.1.1 but the result is same.

I tried same streaming on MAC QT X and interestingly it was all fine.AV sync was there even after 12 hours.

Is there any issue with VLC with respect to 720p?

Please help as it is urgent!!!

[Jean-Baptiste Kempf]

Can you sahre the messages when desync happens?

[kushakyal]

The messages displayed when the sync went off are:

main warning: resampling stopped after 12325000 usec (drift: -30382)
main debug: auto hidding mouse
main warning: buffer is 40001 in advance, triggering downsampling
main warning: resampling stopped after 9065000 usec (drift: -452)
main warning: buffer is 40051 in advance, triggering downsampling
main warning: resampling stopped after 9110000 usec (drift: -683)
main warning: buffer is 40004 in advance, triggering downsampling
main warning: resampling stopped after 9105000 usec (drift: -950)
main debug: control type=1
main debug: thread (es out timeshift) created at priority 1 (../.././src/input/es_out_timeshift.c:768)
main debug: thread started
main debug: auto hidding mouse
main debug: control type=1
main warning: computed PTS is out of range (22913335), clearing out
main warning: output PTS is out of range (22934709), clearing out
main debug: audio output is starving (384976), playing silence
main warning: output date isn't PTS date, requesting resampling (-42976)
main warning: buffer is 42975 in advance, triggering downsampling
main warning: resampling stopped after 9495000 usec (drift: -311)
main warning: buffer is 40028 in advance, triggering downsampling
main warning: resampling stopped after 9105000 usec (drift: -594)
main warning: buffer is 40016 in advance, triggering downsampling
main warning: resampling stopped after 9155000 usec (drift: -979)
main debug: auto hidding mouse

Note:
720p here means 640x360/60p

[Jean-Baptiste Kempf]

Try with VLC 2.1.0-pre1

[kushakyal]

The audio-video sync mismatch is still seen with vlc 2.1.0 pre 1 (20130528-0005, 20130628-1600, 20130702-0003).
Should I try with another version or I require to do some additional settings in VLC.

[Jean-Baptiste Kempf]

What happens if you increase the input caching?

[kushakyal]

Checked with vlc version vlc 2.1.0 pre 1 (20130702-0003) by increasing the caching size to 3,5,7,9 seconds but the problem is still there.

[Jean-Baptiste Kempf]

OK, then I don't know.

[kushakyal]

1.Does VLC consider the timestamps passed along with the RTP packets or it internally calculates them and displays the buffer?
If it considers what is passed to it, is there a setting in VLC to tell it to calculate timestamps internally?

[Rémi Denis-Courmont]

1) It depends on the RTP payload format. 2) No.

[kushakyal]

Thanks for the reply.

Is there any way in VLC to check all the PTS values.
I have already checked the RTP timestamp values in the payload on the sender side.
And I just want to confirm whether the values calculated on VLC side are correct or not.