GEOSATpro Sync

tdti1

SatelliteGuys Pro
Original poster
Nov 23, 2004
2,321
3
Montreal, QC
I notice lots of channels on the east are out of sync, watching a movie right now on nss-806 and it's so off it's annoying.
 
Without sharing the channel, how can we verify or it will be very difficult to assist. AV sync is a problem with many services.

There are several reasons that AV sync can be off.

If a channel's av is out of sync the moment the mux is first tuned, the channel is being transmitted that way. Broadcasters often resync the AV after passing through the video and audio switchers and mixers. Your TV or advanced AV processors often can be set with different AV delays to adjust timing.

Often DVB channels do not properly reference the PCR (equivalent to sprocket holes in film that provides sync to the display) and timing drifts.when a channel is tuned for longer periods (1/2 day, 1 or 2 days, etc.). Changing the channel to another transponder then retuning or power cycling the receiver will force an AV resync. If the service's PCR PID is listed as 8191 or 8192, the channel does not reference the PCR, which provides AV sync.
 
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Sorry, this satellite is far below our horizon, so will need to ask other members to weigh in on what they see.

So is the channel out of av sync when first tuned or does it drift over time?

As you may notice, the PCR PID that you provided (33) does not match the video PID (34). This may be an error in the service's table and would cause av sync issues if the PID 33 is invalid.

You might try using one of the channel editors to change the PCR PID to match the VPID and see if that fixes the AV sync issue.
 

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