andyg;665988 Wrote: > Actually I should mention that the code Apple released doesn't appear to > include any MP4 code, only code to decode raw CAF (CoreAudio Format) > files, and of course basically all ALAC files are going to be in MP4. > So that would require additional code...Yes. But --alluding to my earlier > post -- the function of the extra code would only be to route the contents of all boxes into the bitbucket, until it encounters the one box that contains the actual raw audio stream.
However there might be another problem; it could be that MP4 is fundamentally not live streamable to a Squeezebox type of player. Due to the aforementioned box structure, I believe you have to start reading an MP4 from the beginning of the file, because you calculate each box position as a chained offset from the previous one, and thus ultimately from the start of the file. I don't think the boxes have unique header codes to identify the beginning each box, so if you started at a random position in the file (e.g. by means of an HTTP Range Seek) you would never be able to re-sync. Of course it is possible that the ALAC core audio stream, (what is inside the audio box), might itself have frames with unique header codes, so possibly the player could simply ignore the outer MP4 boxes entirely, and just re-synch on the internal ALAC frames. => If that would be the case, then Andy's concerns about handling the MP4 stuff would be trivial: just ignore it ;-) -- AndrewFG Regards, AndrewFG Try out Whitebear. The middleware that joins the two worlds of: 1. UPnP/DLNA media clients and media players, and, 2. Squeezebox Server and Squeeze Players Download it for free here: http://www.whitebear.ch/mediaserver ------------------------------------------------------------------------ AndrewFG's Profile: http://forums.slimdevices.com/member.php?userid=15838 View this thread: http://forums.slimdevices.com/showthread.php?t=91185 _______________________________________________ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/discuss
