[dvblast-devel] Lip sync error

[Jaroslav Klaus]

On 19 Feb 2010, at 20:37, Jaroslav Klaus wrote:

> Hi,
> 
> I'm having lip sync error with dvblast (1.1 and 1.2-trunk) + TT 3200 + CAM + 2.6.32-trunk-686 (from deb testing). The delay depends on channel (sid). Some channels have lip sync error lower then 0.3s but some of them have more than 1s. I've tried -i and -W, udp, rtp, budget mode, filtering mode. So far without success. I guess the amount of error _slightly_ varies between restarts of dvblast. VLC 1.0.4 hasn't this issue (same channel, same CAM etc.).


I get lip sync error also with vlc with dvb-caching = 1. I haven't read vlc source code yet but is it possible vlc eliminates PTS difference of audio and video using cache (only for DVB access)?  My STB probably cannot handle PTS correctly. I compared VLC client and STB and I got audio presented in the same time while STB presented video too soon (no video cache in STB?). So far it looks dvblast is innocent.

Jaroslav