HTTP delivery- fullscreen playback shrinks

Hi guys J

I was wondering if you might know if there is a UDTA atom type which will enable quicktime to NEVER minimise on fullscreen playback. Failing that, that there might be another QTFF compliant method to force quicktime to buffer in fullscreen. By buffer I mean when playback exceeds the data payload of the HTTP ‘stream’.

Quicktime on windows (all flavours) stays open and paused whilst on a miniMac it stays open and paused, yet on other macs it falls back to the desktop.

Please save me and the last of my hair... there isn’t much left!

Regards,

From: quicktime-api-bounces+bren.norris=email@hidden [mailto:quicktime-api-bounces+bren.norris=email@hidden] On Behalf Of Muraviev Dmitry
Sent: Friday, 13 June 2008 8:07 AM
To: email@hidden
Subject: Re: Trouble synchronizing audio/video with SG

On 09.06.2008, at 13:18, Muraviev Dmitry wrote:

Hi, list

I'm capturing video/audio using SGDataProc. To determine time difference between audio and video channels i use this code:

err = SGGetTimeBase(seqGrab, &sgTimeBase);

...

err = SGGetChannelTimeBase(audioChannel, &soundTimeBase);

...

TimeRecord vid, aud;

GetTimeBaseTime (sgTimeBase, 10000, &vid);

GetTimeBaseTime (soundTimeBase, 10000, &aud);

timeShift = (double)WideToSInt64(aud.value)/(double)aud.scale - (double)WideToSInt64(vid.value)/(double)vid.scale;

In most cases it gives me correct result and I synchronize my movie using SGDataProc TimeValue. But sometimes it seems that I get wrong value. And audio track shifts on 3-5 frames.

Can anyone give me suggestions how can I obtain the real delta between TimeValues coming with SGDataProc with video and audio samples?

I have reviewed the list and found a problem similar to mine: http://lists.apple.com/archives/quicktime-api/2005/Jul/msg00091.html

But I did not find a solution to this problem.

Is it possible to synchronize audio and video data with high accuracy using Sequence Grabber API?

I have tried to do this using a comparison of audio channel timeBaseTime value with sequence grabber timeBaseTime value. (As far as I understand, audio and video channels initialized with a slight delay) And I got good results. But I don't sure that this always works and that it's the best way to synchronize audio and video data.

All I need is to get the compliance of timeValues of the video and audio channels returned by sgDataProc.

Thanks in advance!

References:
	>Trouble synchronizing audio/video with SG (From: Muraviev Dmitry <email@hidden>)
	>Re: Trouble synchronizing audio/video with SG (From: Muraviev Dmitry <email@hidden>)