I started a wiki page on the matter. Next thing to research to implement the draft is support for this in gstreamer and ffmpeg:
http://wiki.gnashdev.org/MediaCapabilities Comments and help are welcome. --strk; On Mon, Sep 22, 2008 at 10:42:42AM +0200, strk wrote: > Added swfdec developer in Cc. > > Ben, we're trying to define a way for an SWF movie to tell which > containers and codecs are supported by a flash player. > > John's drafty draft (below) looks fine to me. What do you think ? > > --strk; > > On Mon, Sep 22, 2008 at 01:19:42AM -0700, John Gilmore wrote: > > > Adobe's description of Flash Lite doesn't say, of course, what the > > mime types are returned for popular formats. Indeed, this interface > > just looks like it documents the container types, not the codecs. > > There's confirming info about this in a tutorial: > > > > http://mobiforge.com/designing/story/flash-lite-and-video-streaming > > > > which shows "video/3GP" as a returned type, and also describes the > > wide variety of codecs usable within that type. Dumb. > > > > I suggest that we add a parallel interface, > > > > System.capabilities.videoDecoderTypes > > System.capabilities.audioDecoderTypes > > System.capabilities.videoEncoderTypes > > System.capabilities.audioEncoderTypes > > > > which would return the necessary info. > > > > Then a Flash movie would be able to check for both container support > > and for codec support (for both video and audio, potentially) if it > > wanted to select among copies of a movie in various formats. > > > > We should also draft a spec for such an interface, put it in the > > public Gnash documentation, and feed it to Adobe for consideration in > > future revisions of Flash. We can implement it regardless of what > > they do, but at least we'll be doing OUR part to avoid needless > > incompatability. > > > > Very drafty draft (from this, you already know I don't understand > > ActionScript syntax): In a system with Gnash, configured to use ffmpeg > > or gstreamer, in which the configured media library contains these > > decoders. (Depending on what other codec plugins are available, lots > > more will also be described in these arrays.) > > > > System.capabilities.videoMIMETypes ["video/ogg"] will be true. > > System.capabilities.audioMIMETypes ["audio/ogg"] will be true. > > System.capabilities.audioDecoderTypes ["vorbis"] will be true. > > System.capabilities.audioDecoderTypes ["speex"] will be true. > > System.capabilities.audioDecoderTypes ["flac"] will be true. > > System.capabilities.videoDecoderTypes ["theora"] will be true. > > > > The codec names should generally be in lowercase, so people won't have > > to case-match them. (We may be stuck with random cases in the MIME > > types, like the above "video/3GP", but at least we can do better in > > our own interface.) Some will be nonintuitive, e.g. MP3 won't be > > called mp3 because it's real name is something else; mp3 is a > > high-speed collision between a container format and a codec. > > > > _______________________________________________ > Gnash-dev mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/gnash-dev -- () ASCII Ribbon Campaign /\ Keep it simple! _______________________________________________ Gnash-dev mailing list [email protected] http://lists.gnu.org/mailman/listinfo/gnash-dev
