Matt
Tue Oct 23 09:26:20 PDT 2007
"Tim Roberts" <timr@probo.com> wrote in message
news:5t3lh3hj9ob7b0e9sagovu21hlfln2f4r9@4ax.com...
> "Matt" <phatmatt142@gmail.com> wrote:
>>
>>No, that's not the problem. If I capture audio and video, the playback
>>time
>>will be correct, and the audio captures fine (it's not using my driver).
>>But
>>I still end up with only one frame from my camera. Also while capturing I
>>can see the preview window with updated images - so the os is getting the
>>right frames. I have tried capturing with preview off (thinking maybe
>>preview was stealing the frames from capture?), but there was no change in
>>the captured file.
>
> Ah, now that begins to sound very much like a timestamp issue. Preview
> ignores timestamps. Capture cares. How are you timestamping the frames
> in
> your driver?
> --
> Tim Roberts, timr@probo.com
> Providenza & Boekelheide, Inc.
I found the issue - it was because the avshws sample does not include
if(Leading->StreamHeader->Size >= sizeof(KSSTREAM_HEADER) +
sizeof(KS_FRAME_INFO))
{
PKS_FRAME_INFO FrameInfo = reinterpret_cast
<PKS_FRAME_INFO>(Leading->StreamHeader + 1);
FrameInfo->ExtendedHeaderSize = sizeof (KS_FRAME_INFO);
FrameInfo->PictureNumber = m_Device->QueryFrameNumber();
FrameInfo->DropCount = m_Device->QueryDroppedFrames();
}
Once I included this in the area where I set the time stamp, the capture
started working correctly.
Also, I noticed that both of the AVStream samples are using the wrong
function to set the
PresentationTime.Time value. Instead of using GetTime() you need to use
GetCorrelatedTime.
Thanks again for the help,
Matt