[XviD-devel] Serialize Xvid-AVICompressionOptions

[Steffen Binas]

Hi,

In our software we create avi videos with standard Video For Windows 
functions (VfW). It works well except for the xvid-codec. ( 
http://www.koepi.org/xvid.shtml ) On some machines it works, on other it 
works sometime or not at all. We do not do anything specific for xvid 
nor we "speak" directly with this codec. So I wonder why it does not 
work. My assumption is that serializing the compression options 
(AVICompressionOptions, 
http://msdn2.microsoft.com/en-gb/library/ms706255.aspx ) is the problem.

What we do:
Open the default avi options dialog (with AVISaveOptions) to get the 
compression options. The user can select the codec there and change the 
xvid settings. To make the options persistent we serialize them.

Serialize: Write "cbParms" bytes of "lpParms" to a stream. These are the 
only fields that have a value when using xvid, but we do of cause 
serialize all other fields too.
Deserialize: Allocate "cbParms" bytes of Memory and read the bytes into 
"lpParms".

This works fine for other codecs, but not for xvid. Do you know if xvid 
contains fields in lpFormat that are not serializable (e.g. pointers to 
other structs)? Are there any possibilities to check what went wrong? Is 
there a error logging mechanism?


Best Regards
   Steffen