DVB-S with HD and AC3 out of sync

[Oden]

I use DVBViewer to watch DVB-S (tv from satellite) and have a FireDTV-S2 card. HDMI is used to send picture and sound to my LCD-tv and it workes excellent on 99% of the channels. The problems is when HD-channels are sent with AC3 sound code. I have downloaded some codec for AC3 sound but it is out of sync.

 

Anyone have a idea what to try?

 

Can it help to get a sound card with for example DTS function built in?

[fuseblower]

In my experience it can either be the transmission (which the broadcaster eventually fixes) or what can cause a problem is the video codec used. For instance I have just upgraded the coreavc codec and there are lipsync problems. Try some experimentation. In closing I have never experienced lip sync problems because of the audio codec used. Hope this helps.

[Derrick]

The transmitted time stamps should keep the elementary streams of a program sysnchronized. Some broadcasters send ac-3 deliberately a little bit ahead of the video stream. Better AV-amps have means to adjust the timing. This can also be done with the system delay of the AC-3 filter.