3rd party codec & Sample sizes
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3rd party codec & Sample sizes

 
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Shawn Nagase
Guest
Posted: Thu Sep 09, 2004 10:07 am    Post subject: 3rd party codec & Sample sizes Reply with quote
I hope someone can help me, I've been struggling for some time now with
writing compressed video samples using the media format sdk. I've got
everything working but I'm having problems with playback of these files. My
sample sizes vary from 3k all the way to 500k since I'm using a delta
algorithm for the video data. Also, the video is desktop resolution (i.e.
1024x768) so it is rather large.

Unfortunately, no matter what I set the bitrate, or packet sizes, I can't
get the playback to work properly. I've written a dummy DMO object that gets
loaded but all the larger frames written (greater than 20-30k) are ignored so
I am never able to reconstruct the full image.

I've never had much luck with these newsgroups so I hope someone will
respond. Thanks in advance!


Shawn Nagase

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Geoff Dunbar [MSFT]
Guest
Posted: Mon Sep 13, 2004 10:24 pm    Post subject: Re: 3rd party codec & Sample sizes Reply with quote
Shawn,

If you look at the generated file in the ASF Viewer tool, are your samples
getting into the file?

ASF Viewer tools available here:

http://www.microsoft.com/windows/windowsmedia/format/ASFViewer.aspx

Thanks,
Geoff

--
This posting is provided "AS IS" with no warranties, and confers no rights.

"Shawn Nagase" <ShawnNagase@discussions.microsoft.com> wrote in message
news:7839B610-4329-467D-B6B7-FFD9F2D2477A@microsoft.com...
Quote:
I hope someone can help me, I've been struggling for some time now with
writing compressed video samples using the media format sdk. I've got
everything working but I'm having problems with playback of these files.
My
sample sizes vary from 3k all the way to 500k since I'm using a delta
algorithm for the video data. Also, the video is desktop resolution (i.e.
1024x768) so it is rather large.

Unfortunately, no matter what I set the bitrate, or packet sizes, I can't
get the playback to work properly. I've written a dummy DMO object that
gets
loaded but all the larger frames written (greater than 20-30k) are ignored
so
I am never able to reconstruct the full image.

I've never had much luck with these newsgroups so I hope someone will
respond. Thanks in advance!


Shawn Nagase
Back to top
Shawn Nagase
Guest
Posted: Tue Sep 14, 2004 6:11 am    Post subject: Re: 3rd party codec & Sample sizes Reply with quote
Yes, my samples are getting into the file. I have some additional
information regarding this issue. I am able to playback through graphedit
and the frames are processed properly with no dropped frames. The problem I
am having is with WMP 6.4. Ultimately, we want to embed the WMP ActiveX
control to host the playback inside our application. It appears that WMP is
dropping all of the larger samples which I appears to be around the size of
the packets.

If it can help, I can provide the file or output from the ASF Viewer utility.


Thanks,

Shawn Nagase

"Geoff Dunbar [MSFT]" wrote:

Quote:
Shawn,

If you look at the generated file in the ASF Viewer tool, are your samples
getting into the file?

ASF Viewer tools available here:

http://www.microsoft.com/windows/windowsmedia/format/ASFViewer.aspx

Thanks,
Geoff

--
This posting is provided "AS IS" with no warranties, and confers no rights.

"Shawn Nagase" <ShawnNagase@discussions.microsoft.com> wrote in message
news:7839B610-4329-467D-B6B7-FFD9F2D2477A@microsoft.com...
I hope someone can help me, I've been struggling for some time now with
writing compressed video samples using the media format sdk. I've got
everything working but I'm having problems with playback of these files.
My
sample sizes vary from 3k all the way to 500k since I'm using a delta
algorithm for the video data. Also, the video is desktop resolution (i.e.
1024x768) so it is rather large.

Unfortunately, no matter what I set the bitrate, or packet sizes, I can't
get the playback to work properly. I've written a dummy DMO object that
gets
loaded but all the larger frames written (greater than 20-30k) are ignored
so
I am never able to reconstruct the full image.

I've never had much luck with these newsgroups so I hope someone will
respond. Thanks in advance!


Shawn Nagase




Back to top
Geoff Dunbar [MSFT]
Guest
Posted: Mon Sep 20, 2004 10:50 pm    Post subject: Re: 3rd party codec & Sample sizes Reply with quote
My understanding is that if you install the version 9 or version 10 Windows
Media Player it will replace the 6.4 player as the ActiveX control. This
might be a good workaround for your problem. Have you tried that?

Thanks,
Geoff

--
This posting is provided "AS IS" with no warranties, and confers no rights.

"Shawn Nagase" <ShawnNagase@discussions.microsoft.com> wrote in message
news:4A6BFAA2-A75C-4403-9FE0-7C64DEBD4404@microsoft.com...
Quote:
Yes, my samples are getting into the file. I have some additional
information regarding this issue. I am able to playback through graphedit
and the frames are processed properly with no dropped frames. The problem
I
am having is with WMP 6.4. Ultimately, we want to embed the WMP ActiveX
control to host the playback inside our application. It appears that WMP
is
dropping all of the larger samples which I appears to be around the size
of
the packets.

If it can help, I can provide the file or output from the ASF Viewer
utility.


Thanks,

Shawn Nagase

"Geoff Dunbar [MSFT]" wrote:

Shawn,

If you look at the generated file in the ASF Viewer tool, are your
samples
getting into the file?

ASF Viewer tools available here:

http://www.microsoft.com/windows/windowsmedia/format/ASFViewer.aspx

Thanks,
Geoff

--
This posting is provided "AS IS" with no warranties, and confers no
rights.

"Shawn Nagase" <ShawnNagase@discussions.microsoft.com> wrote in message
news:7839B610-4329-467D-B6B7-FFD9F2D2477A@microsoft.com...
I hope someone can help me, I've been struggling for some time now
with
writing compressed video samples using the media format sdk. I've got
everything working but I'm having problems with playback of these
files.
My
sample sizes vary from 3k all the way to 500k since I'm using a delta
algorithm for the video data. Also, the video is desktop resolution
(i.e.
1024x768) so it is rather large.

Unfortunately, no matter what I set the bitrate, or packet sizes, I
can't
get the playback to work properly. I've written a dummy DMO object
that
gets
loaded but all the larger frames written (greater than 20-30k) are
ignored
so
I am never able to reconstruct the full image.

I've never had much luck with these newsgroups so I hope someone will
respond. Thanks in advance!


Shawn Nagase


Back to top
 
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