Re: [Libquicktime-devel] quicktime_is_bframe() breaking for wobbly GOP pattern

[Burkhard P. <pl...@ig...>]

Hi,

the more I look at the code, the more I get the feeling that
it's too messy to get fixed. The next file with a probably
even weirder GOP pattern might break the code again.
The logic behind seeking and resyncing in a file with
B-frames actually quite straightforward, but our code, which
grew over the years from patches by different submitters, doesn't
resemble this.

Also, from what I see our current resync/skip mechanism will
produce garbled output for H.264 streams with B-pyramids
(where B-frames can also be reference frames).

I'll think about how we can enhance lqt_read_video_packet()
and use it from within the codecs. One generic routine, which
outputs the PTS, DTS and frame type along with the compressed data
would probably help a lot.

Burkhard