[Bug 693000] codecparsers: mpeg2: fix default quantizer matrix for intra blocks

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=693000
  GStreamer | gst-plugins-bad | git

--- Comment #10 from Gwenole Beauchesne <gb.devel at gmail.com> 2013-02-05 12:55:46 UTC ---
(In reply to comment #9)
> Isn't there a different zig zag pattern in some cases? (for interlaced
> content?)

No, not for MPEG-2 AFAIK. And, if there was, we did not handle that either
anyway. :)

I think I see what you mean, it doesn't look to be MPEG-2. 7.3.1 implies that
only scan 0 is used. Probably MPEG-4 where, depending on the field parity, the
scan could be going to the right first, or going to the bottom first. Or this
is for something different to the quantization matrices.

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