Moving my blog to Channel 9
- Posted: Nov 13, 2009 at 6:29 PM
- 5,081 Views
- 2 Comments
Hello all,
Sorry so long without blogging. I've been in the process of getting moved over from On10.net to Channel 9 for reasons to tiresome to mention, and this little side project has been eating up a lot of my time.
So, going forward, my official new home is
http://channel9.msdn.com/posts/benwaggoner/
And soon good old
http://www.benwaggoner.com
Will direct here as well
So going forward, this is where you'll find all the Ben Waggoner Silverlight/Smooth Streaming/compression/media technology goodness.
At some point I'm hoping to get my old On10.net posts migrated over, but for the meantime they will also remain hosted at the old blog.
Sorry so long without blogging. I've been in the process of getting moved over from On10.net to Channel 9 for reasons to tiresome to mention, and this little side project has been eating up a lot of my time.
So, going forward, my official new home is
http://channel9.msdn.com/posts/benwaggoner/
And soon good old
http://www.benwaggoner.com
Will direct here as well
So going forward, this is where you'll find all the Ben Waggoner Silverlight/Smooth Streaming/compression/media technology goodness.
At some point I'm hoping to get my old On10.net posts migrated over, but for the meantime they will also remain hosted at the old blog.
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Ben,
What's a good resource for DirectShow changes / additions in Windows 7 ?
Hi Ben,
Thanks for your very informative tutorial "Encoding screen recordings for Silverlight in VC-1 with Expression Encoder". I have experimented with various settings and settled on VC-1 Quality based VBR mode. I had 2 interesting findings:
1. I thought B frame can reduce file size because it can be more efficiently encoded than P frame. However my experiment seems to indicate the opposite. Changing B frame from 0 to 2 caused 18% file size increase in quality based VBR mode, so I would guess in peak bitrate VBR mode it will cause quality decrease. Is there an explanation for this?
2. play back video with long key frame interval. I have encoded a 2 hour long screen capture video with a key frame interval of 20 seconds. when I play the encoded video file in WMP 11, I found it difficult to randomly jump to the middle of the video. WMP 11 always reverts back to the previous key frame which could be up to 20 seconds away. However, using exactly the same source and same setting, I encoded the first 10 minutes to a video file, WMP 11 can smoothly jump to the middle of the video and start playing at the exact location I specified, without reverting back to the previous key frame. I can consistenly reproduce this phenomenon with various sources and various key frame intervals up to 100 seconds(Expression limit). It is puzzuling. do you have any insight into it?
Thanks,
Steven
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