video and audio not sync

[dazi001]

Hi,

I am using VLC 1.1.7 as streaming server (HTTP).
OS is Win XP, SP2.
I figured out the problem, that the audio gets more and more
delayed the longer I stream. Each 24 hours it is about 8 sec more delayed.
I tried already "properties - straem - s-out- transcode - synchronize based on Audio"
but this does not change anything.
I am new to VLC and streaming - so I hope there are some other setting
someone can tell me...

Thanks

[Greg]

I believe the only settings are:
Synchronise on audio track, in Preferences
Or
command option <audio-sync> in transcode string

DVB-T (or S) input devices have been reported to have problems with audio / video sync.
Could possibly be a soundcard hardware related problem if using analog capture input?

[dazi001]

The synchronize on audio track does not change anything.
But the <audio-sync> maybe a good hint. I will try this. Thanks.

Actually I am using an usb-video capture device which is connected to the
chinch-output of my receiver. This is audio and video input as well.
The soundcard is not involved.
And as I said - after starting the streaming it is snchron.

My problem is, that I will be off by friday for 4 weeks. and I would like
to watch tv during that time. So I have no more time to make long tests.
Thats why I made a quick-and-dirty solution:
I installed a remote-control-software on the streaming PC.
if the desync is only small, I can adjust it with J an K on the slave.
Otherwise I connect to the streaming PC, stop VLC, start it again (and
enter all that settings because I not yet found a way to save them) and
it will be fine for that day.
I know, not the best solution ... but it works.

Thank you

[Greg]

If you have remote control and can restart VLC..

You could write a batch file with all your settings, for a one click solution..
See


viewtopic.php?f=4&t=84404

[dazi001]

Good hint - thans a lot.
That would have been my next point.
I already tried a bit, but was also lost - I assume also because of quotes and where to put them.
As the s-out is very similar to mine, this will definitively help me.
My be I can try this even by remote.

Hopefully someone can help me in the same way with the original problem - the increasing desynchronisation
of audio and video.

Thanks

[Greg]

Re your original desync problems...
If you carefully read through this post and especially the other links in that post...

viewtopic.php?f=4&t=87254

It would seem that some hardware (DVB-x and perhaps some other usb devices) in Windows are having a problem with audio sync. There does not appear to be a fix at the moment. It might be worth trying VLC 1.0.5 to see if it works ( it does in the Linux case). This earlier version is now unsupported and has various bugs. So up to you?
My own setup in Win XP uses a bt878 video capture card and soundcard for audio. I do not suffer any audio sync problem at least up to 15hrs ( last tested on VLC 1.1.4 ) . So a change in capture hardware may well work for you.