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G450 eTV PAL, and vdub capture using YUY2
Hi,
I made the following posting in the Matrox forum,http://forum.matrox.com/mgaforum/For...ML/003553.html: It basically describes how I'm capturing;
I'm using VirtualDub to make captures using YUY2 with a res 384x288. Due to a capture duration limitation I'm limited to captures of 35min57secs.
Has anyone experienced this problem?
I go on to say:
Does anyone have this sync problem? I realise that troubleshooting for YUY2 capture using the VidCap is not supported on the Matrox website, so I'm posting here now. I can't think of anything else to do. Can anyone help me with, the sync problem I describe?
BTW, I realise that the audio will run out of sync even if I have no loss of frames, this is becuase I don't lock the audio stream to the video stream. Hence why I have to resample the audio (OR change the frame rate)
However the audio should be changed so that the streams are of the same length:-
Video 10000ms and Audio 10000ms, NOT Video 10000ms,Audio 10080ms.
Which seems to be the case!
Thanks for reading, hope you can help me.
Ma77hew
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** Have you ever been to a party where the ice was cloudy?
I made the following posting in the Matrox forum,http://forum.matrox.com/mgaforum/For...ML/003553.html: It basically describes how I'm capturing;
I'm using VirtualDub to make captures using YUY2 with a res 384x288. Due to a capture duration limitation I'm limited to captures of 35min57secs.
Has anyone experienced this problem?
I go on to say:
<font face="Verdana, Arial, Helvetica" size="2">
2) Before buying the eTV I had an ATI All-in-WonderPro card and I captured using the method described above. The resulting capture would be 100% in sync(Audio+Video sync) at the begining, at out at the end(Obviously). This was okay as I made a quick calculation using the Video and Audio durations to recalculate the Audio duration and resample it. Thus 100% in sync throughout.
I cannot do this with eTV for two reasons; One, the audio doesn't start in sync there is an ~20-30ms displacement(audio delay); Two, the audio at the end of capture is out of sync and cannot be corrected by any calculations, either before/after displacment correction, or if ignored.
</font>
2) Before buying the eTV I had an ATI All-in-WonderPro card and I captured using the method described above. The resulting capture would be 100% in sync(Audio+Video sync) at the begining, at out at the end(Obviously). This was okay as I made a quick calculation using the Video and Audio durations to recalculate the Audio duration and resample it. Thus 100% in sync throughout.
I cannot do this with eTV for two reasons; One, the audio doesn't start in sync there is an ~20-30ms displacement(audio delay); Two, the audio at the end of capture is out of sync and cannot be corrected by any calculations, either before/after displacment correction, or if ignored.
</font>
BTW, I realise that the audio will run out of sync even if I have no loss of frames, this is becuase I don't lock the audio stream to the video stream. Hence why I have to resample the audio (OR change the frame rate)
However the audio should be changed so that the streams are of the same length:-
Video 10000ms and Audio 10000ms, NOT Video 10000ms,Audio 10080ms.
Which seems to be the case!
Thanks for reading, hope you can help me.
Ma77hew
------------------
** Have you ever been to a party where the ice was cloudy?