WM Encoder bit rate,fps vs performance
hi,
I am trying to explore the WM Encoder tool for a screen capture. I
noticed that the encoder always had a different bit rate and capture
rate for each session. I chose to have medium quality output file every
time. I am trying to emulate the performance issues i have with
my application to help me with the same. I have an application which
uses the WM Screen Encoder to do the capture. However, i am
facing performance problems. The CPU resources always max to 90+ pc. Is
there any way to tune my encoder to give me better performance? I am
getting a slightly better performance with your tool. But even in the
case of the tool the resources max to 90pc often. I was wondering how
the bit rate and fps is chosen and how to tune the encoder?
I have a 1.33 Ghz toshiba protege tablet pc.
Thanks.
Samantha
Try to set complexity mode to Live (1):
CComQIPtr<IPropertyBag> propertyBag = encoder;
VARIANT varComplexety;
VariantInit(&varComplexety);
varComplexety.vt = VT_I4;
varComplexety.lVal = 1;
propertyBag->Write(g_wszWMVCComplexityEx, &varComplexety);
Samantha,
Vadun's suggestion would work if you were writing code to do this compression against, say, the Windows Media Format SDK; what he's suggesting is a way to tell the codec to do lower-quality and hopefully less CPU-intensive encoding.
However, it sounds like you're not writing code and instead are just using the WM Encoder tool directly. I unfortunately don't know whether these complexity settings can be set by hand through the user interface. The best place for WM Encoder questions is the WMEncoder newsgroup, which is here: http://www.microsoft.com/windows/windowsmedia/community/newsgroups/WindowsMedia/default.mspx?dg=microsoft.public.windowsmedia.encoder&lang=en&cr=US ... This forum deals with Media Foundation, which is the multimedia programming platform for Windows Vista.
Becky
Hi Becky,
Thanks so much or your response. I figured out what Vandun was trying
to say and i am implementing that in my code.Yes, i am trying to write
my code. I have the code which uses the WM Screen encoder. I am sorry
for the prev. post as I did understand it at once.
many thanks for the pointer to the encoder forum.
Samantha
