[vlc-devel] RTSPServer to VLC

[Rémi Denis-Courmont]

Hello,

Could be a VLC bug, a PulseAudio big, an ALSA driver bug or a hardware/BIOS bug. Good luck.

-- 
Rémi Denis-Courmont
Sent from my NVIDIA Tegra-powered device

----- Reply message -----
De : "David Cassany Viladomat" <david.cassany at i2cat.net>
Pour : <vlc-devel at videolan.org>
Objet : [vlc-devel] RTSPServer to VLC
Date : mar., juil. 22, 2014 18:25

Hi all,
I'm trying to playback audio from an RTSP server (using live555) that already works with ffplay and mplayer. 

The transmitted format is PCMU/48000/2 with payload type 96.





The output message from the vlc is as shown: 
[0x901468] pulse audio output debug: cannot synchronize start
[0x901468] pulse audio output debug: deferring start (9915 us)




[0x901468] pulse audio output warning: starting late (-251 us)
[0x901468] main audio output warning: buffer too late (-16120153 us): dropped
[0x901468] main audio output warning: buffer too late (-16110267 us): dropped





[0x901468] pulse audio output debug: changing sink 1: alsa_output.pci-0000_00_1b.0.analog-stereo (Built-in Audio Analog Stereo)
 
Then, it get lost here:
[0x901468] main audio output warning: buffer too late (-3392242 us): dropped




[0x901468] main audio output debug: inserting 46535 zeroes
[0x901468] main audio output warning: playback way too early (-120008): playing silence
[0x901468] main audio output debug: inserting 5760 zeroes




[0x901468] main audio output warning: playback too early (-50004): down-sampling
[0x901468] main audio output warning: timing screwed (drift: -110003 us): stopping resampling





And, finally, VLC seems to properly get the increment (to be in sync. 
thanks to the RTCP packets) of timing in the GUI but without playing 
anything. I have checked the RTP timestamps of the RTP packets too and everythink looks fine, the increment is equal to the samples number in the packet.


Is it a known issue? Does anyone has an idea of which is the problem?





Thank you in advance,

Kind regards,
David
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