combine audio streams from truehd extension

Brian Dodge bdodge09 at
Wed Apr 10 05:28:12 PDT 2013

It turns out, the problem was the packets are merged, when they 
shouldn't have been.   I am not sure if this is a bug in 1.0.6, but the 
pes filter code *should* drop the AC3 encoded audio stream info (stream 
type 0x83, sub stream ID 0x76).   I fixed this in plugins-bad 0.10.23 by 
detecting the stream id (as is done in 1.0.6 properly) and skipping the 

Also in 0.10 at least there was already a nifty way to combine all of 
the related data for a pes into one buffer, by setting "gather_pes = 
TRUE" which let me start looking at the problem a lot better seeing 
complete audio chunks in one GstBuffer

On 4/9/2013 8:04 PM, Brian Dodge wrote:
> In mpegtsdemux,  Dolby trueHD extended buffers (pes extension, codeAC) 
> should be merged with the not-extended-bit-set buffers into single 
> buffer to push out.   The PES parser properly detects the extension 
> field length, and I can pull out the proper stream ID from the 
> extension header, but I don't see how this info can be sent back up, 
> so that the callback knows that this extension buffer should be merged 
> with the next buffer (or previous buffer, I don't know enough to know).

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