GOP step error for some MKV streams

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Rocky
Posts: 3557
Joined: Fri Sep 06, 2019 12:57 pm

GOP step error for some MKV streams

Post by Rocky »

For some MKV streams a GOP step produces a corrupted picture.

We have a workaround for streams with successive IDR frames with the same idr_pic_id, but this was being applied only for ES streams. When applying it to all container types, the problem is fixed.

I will release this along with the MKV re-design work.
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Rocky
Posts: 3557
Joined: Fri Sep 06, 2019 12:57 pm

GOP step error for some MKV streams

Post by Rocky »

Turns out this is not related to successive IDRs with the same idr_pic_id, and I imagined that it was fixed. Nevertheless that should be fixed. The real reason was very complex and difficult to find but I found it!
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Rocky
Posts: 3557
Joined: Fri Sep 06, 2019 12:57 pm

GOP step error for some MKV streams

Post by Rocky »

After I got forward stepping working reliably I found that backward stepping was hosed. Reliable GOP navigation is important to set accurate project ranges, of course. Anyway, I just got that fixed this morning and as I mentioned in another post will release a candidate version very soon, maybe today.
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