[FFmpeg-devel] Proper parsing of DTS-HD MA streams

Kostya kostya.shishkov
Wed Nov 26 07:23:54 CET 2008

On Tue, Nov 25, 2008 at 06:11:56PM -0800, Robert McNamara wrote:
> Good evening,
> I am writing to revive a discussion on proper parsing of DTS-HD MA in
> dca_parser.c and mpegts.c.
> There were discussions of both issues in June/July of this year.  However,
> it looks as though the discussion lost steam, someone went on vacation,
> adequate samples weren't provided in time, etc.  Most recent Fox and Sony
> blu-ray disks are coming out with DTS-HD MA audio tracks, and it would be
> nice to at least be able to pull out the DTS core.  I have uploaded a sample
> to upload.mplayerhq.hu as /DTS-HD-MA/bond_sample_dtshdma.m2ts.
> Two issues are at play here.  The first is the fact that the mpegts.c parser
> is not able to parse the m2ts and find the DTS-HD track, a discussion begun
> (and ultimately dying) here:
> http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2008-June/048387.html
> The second issue is the fact that DTS-HD tracks are not playing properly in
> dca_parser.c because of an apparent variable frame size.  Discussion here:
> http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2008-June/048498.html
> I have uploaded a sample, tested the former patch and found it to more or
> less work (although I understand it needs to be done a certain way to be
> committed) and have uploaded a sample as requested in that long-ago thread.
> I stand ready to provide other samples, samples of greater size, and
> otherwise do whatever I can to assist in solving this problem.  Thanks a
> lot.
> Robert

Thank you for the sample. I'll try to find some time to improve parser.

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