What about libraries on FFmpeg? If some one know all about H.264 is Jason Garrett-Glaser, a.k.a., Dark Shikari http://x264dev.multimedia.cx/
On Wednesday, March 13, 2013 10:12:04 PM UTC-6, Edwin Flores wrote: > Hi, > > > > I'm starting work on bringing H264 support to Mac and it was suggested I > > post here to get some feedback from the resident Mac/Codec gurus. > > > > Roughly, the plan is: > > > > 1. Find/implement an MP4 demuxer. (see end of email for "WHY?!") > > Seemed straightforward to implement at first, but quite fiddly getting > > at all the information we need to decode AVC. > > > > I'm currently looking at demuxers from open source projects I might be > > able to use. But, each demuxer is tied into its own project's streaming > > code, which is in turn tied up in all the other common code in the > > project, making repurposing them difficult. VLC's libmp4 looks the most > > attractive at the moment. > > > > 2. Decode things! > > Take the audio and video samples and pass them on to the corresponding > > Apple decompression framework -- AudioToolbox for audio, QuickTime Image > > Compression Manager for video (this framework gives us support back to > > 10.6). > > > > 3. Hardware acceleration. > > OSX 10.7 provides the VideoDecodeAcceleration framework which is > > specifically meant for hardware accelerated decoding of H264 video. Its > > API is very similar to that of QuickTime's ICM. > > > > > > Questions I have: > > > > - Are there any good demuxing libraries out there that I could use? > > - Is there any IP protection around the MP4 container format itself, or > > the AVC specific boxes, or the AVC Network Abstraction Layer, that would > > prevent us from being able to ship an MP4 parser capable of extracting > > AVC samples and the metadata required to decode those samples? > > > > Questions you have: > > > > Why not just use the AVFoundation/QTKit/QuickTime framework? (or, Y U > > IMPLEMENT MP4 PARSER?) > > All of these frameworks take URIs, filenames, or the whole file in > > memory at once. So far as I can see, there isn't a way to crack any of > > them open and stick a MediaResource in there. If I'm wrong about this, > > I'd be very interested to hear about it. > > > > > > Any guidance would be greatly appreciated. > > > > > > Cheers, > > Edwin _______________________________________________ dev-media mailing list [email protected] https://lists.mozilla.org/listinfo/dev-media
