Re: software for manipulating AVI files

[John W. Eaton]

On 29-Sep-2005, Brendan Drew wrote:

| Unfortunately, the AVI file format is not quite as simple as one would 
| want to believe. AVI is merely a container format, it makes no 
| statements about how things are compressed or decompressed. Depending on 
| the codecs you're using, things can become very complicated very quickly 
| (specifying which codec and then specific parameters for that codec, 
| followed by relevant sanity checking, correctly matching AVI streams to 
| codecs when you have multiple versions to choose between, etc.)

OK, I see that now.  I suppose my question displayed my ignorance of
the situation.  I assumed that "AVI file" was well defined.

OK, so suppose we don't care about handling anything more than being
able to read and write the kinds of AVI files that Matlab produces?
Would that be hard to write?  I'm looking at

http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/directx9_c/directx/htm/avirifffilereference.asp

Given this, I think I can write code that will decode the file I have
(generated with avifile and addframe with no compression).  So the
question I have now is, how is the frame data stored for this kind of
file?

jwe



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