> From: David Sweet <email@hidden>
> Date: Sun, 25 Mar 2007 10:52:49 -0400
>
> SoftVDigX comes with frames (ImageData_??.h) that are already
> compressed in 2vuy format. From all of the reading I've done it
> seems that the only way to provide frames to a Sequence Grabber is in
> a compressed format (of which there are many choices). Is it not
> possible to provide uncompressed pixmaps or bitmaps, one for each frame?
There is no reason why the compressed format choice provided by your vdig
can't be the uncompressed format that you are looking for (which happens to
be 'raw ' kRawCodecType). A vdig can support many formats. In the SoftVDigX
source code the list of supported formats is set in vdigGetCompressionTypes
and the current format is set by vdigSetCompression.
> I'm modifying SoftVDigX to create frames on-the-fly. It seems to be
> a waste of CPU cycles to compress them and send them to a Sequence
> Grabber which will subsequently decompress them. Why not just leave
> them uncompressed?
The Sequence Grabber can convert the input from the vdig to another format
using a compressor. Some formats provided by a vdig may be faster than
others as inputs to the compressor. When displaying the input from a vdig,
some formats may be supported by hardware (e.g. OpenGL can display 'yuvs'
data).
Your vdig should provide the easiest formats that your hardware/software can
produce. Then let the Sequence Grabber do the rest of the work.
> Any advice and/or explanation of how I've misunderstood this process
> would be greatly appreciated.
>
> Dave
****************************************************************************
This email may contain confidential material.
If you were not an intended recipient,
Please notify the sender and delete all copies.
We may monitor email to and from our network.
****************************************************************************
_______________________________________________
Do not post admin requests to the list. They will be ignored.
QuickTime-API mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quicktime-api/email@hidden
This email sent to email@hidden
