[FFmpeg-devel] Support for generating avm2 compatible swf files

Baptiste Coudurier baptiste.coudurier
Tue Jan 15 11:08:34 CET 2008


Paul Egan wrote:
>> [...]
> I wasn't sure of the convention for adding a new version of a
> file format.  What would be acceptable?
>> why is the version not always set to the newest, does it fail with old
>> programs?
> Users of older versions of the Flash player can happily 
> interact with older version swf files - this issue effects
> only those developers/users using an AVM2 based application.
> If a version 9 swf file was generated by default, it wouldn't
> be usable by older players.
>> what does the newly added chunk mean and why is it not always added?
> When loading a swf, AVM2 looks at both the version number 
> and the file attribute tag to determine if the movie clip is
> AVM2 [3].  The attribute tag should probably be added to v8 
> swf files as well, but I didn't want to change existing 
> functionality.

If tag is FILEATTRIBUTE, better naming it that way, and use put_swf_tag.
Can you document (in comments) which feature your are setting with this
tag ?

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