Re: Can't watch Webcast on PocketPC
- From: "Tony A." <foo@xxxxxxx>
- Date: Wed, 30 Nov 2005 12:21:34 -0000
Yes, you should definitely still reduce the resolution to 640x480,
since that's what your device can show 1:1, there's no point having it
higher.
I did some tests (on a screen capture using the WMV9 Screen codec) and
found that using WMV9, "Quality VBR", with a "Video quality" setting
of 50, keyframe interval of 8s, framerate set to the same as my test
file, "Decoder complexity" set to "simple", gave me a file size around
twice the original, with acceptable quality, playable in pocket WMP.
Halving the frame rate didn't actually seem to have much effect on
file size, strangely. I don't think you can do much better than that
on file size and still keep usful quality.
Those settings are in Properties->Compression->[Edit] BTW, I'm sure
you found them already. The WMEncoder interface is pretty opaque if
your task doesn't fall neatly into one of the wizards. It usually
takes me a few attempts to get it to do what I want, and usually some
head scratching too.
Kurt_MI wrote:
> Yes, changing the resolution to 640x480 made it come out Crystal
> Clear!!! ...but the file size is still large at 37 MB when the
> original file was 7 MB
>
> I just discovered that the original webcast had:
> - Frame Rate = 4 fps (I will try this next)
> - Resolution = 704 x 528 (odd size?) (should I still reduce to
> 640x480 ?)
>
> Windows Media Encoder, and its concepts, are very new to me. I was
> not able to find where to change the setting to VBR (variable bit
> rate). I but I will try again, and it may make more sence to me as
I
> learn the interface.
>
> Here is what I had it set to the first time which gave the 37MB
file:
> Audio encoding mode: CBR
> Video encoding mode: CBR
> Audience: 237.05 Kbps
> Audio codec: Windows Media Audio 9
> Audio format: 32 kbps, 44 kHz, mono CBR
> Video codec: Windows Media Video V8
> Video bit rate: 186 Kbps
> Video size: 640 x 480
> Frame rate: 8 fps
> Key frame: 2 s
> Image quality: 0
> Buffer size: 5 s
> Script bit rate: 10 Kbps
>
> To decrease the file size I tried:
> - 4 fps
> - less sound? not sure what a good setting is
> - Found setting for VBR
> But got error messase "Two-pass encoding is not available for...
live
> broadcasts, screen capture, or encoding from multiple sources"
> and the check box for this setting was enabled and grayed out.
>
> ... large learning curve
.
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