<html> <head> <style> .hmmessage P { margin:0px; padding:0px } body.hmmessage { FONT-SIZE: 10pt; FONT-FAMILY:Tahoma } </style> </head> <body class='hmmessage'> Ok, I at least know what the issue is.  The ESDS in the problematic files contain an object_type_id of 105, whereas all my working test files contain an object_type_id of 107, which qtdemux properly recognizes.  Hacking my local build to treat the two object_type_id the same  suddenly makes it work. Any idea what this object_type_id of 105 means, or where I can get a list of what these types in the ESDS mean? All help appreciated! ..ed.. > Subject: Re: [gst-devel] qtdemux source caps bad on .MP4 file with MP3 audio payload? > From: t.i.m@zen.co.uk > To: gstreamer-devel@lists.sourceforge.net > CC: edaverill@hotmail.com > Date: Thu, 6 Dec 2007 19:23:18 +0000 > > On Thu, 2007-12-06 at 10:15 -0800, Edward Averill wrote: > > > Ok, I'm seeing some really odd qtdemux behavior in my development > > here. > > You're not saying which versions of things (core/base/good/bad) you're > using. > > > I have a .MP4 file that contains MP3 audio only. It plays fine in > > VLC, which figures out it's MP3 audio. > > > > HOWEVER, when I run gst-launch using decodebin, it picks up qtdemux to > > to the parsing (which is the Right Thing), but the caps it sets for > > it's source pad say "mpegversion=(int)4" - which causes decodebin to > > load up an AAC decoder! Things then go to heck in a handbasket, > > because the AAC decoder has no clue what it's being fed and errors > > out. > > > > This seems strange me.. I'd sure like to know why VLC understands that > > it's an MP3 audio payload but qtdemux seems to guess wrong. > > > > Anyone have any ideas what's going on here? Could our MP3 decoder not > > be setting its typefind properly? > > > > All help appreciated! > > The easiest thing would be to make a sample file available to us > somewhere and then file a bug against gst-plugins-good; then we can > check whether we can reproduce the problem with CVS of things or not > (see http://gstreamer.freedesktop.org/bugs/ ). > > Cheers > -Tim > > > </body> </html>