[Libquicktime-devel] Issue with stps-atom and packetindex

[Erik J. <eri...@gm...>]

Hello,

I was provided with a sample file which contains all open-GOP MPEG2
essence. The structure of the file is IBBPBB... where the first two
B-frames reference a non existing keyframe. These two broken frames
are ignored thanks to an edts entry. The stss atom is empty as there
are only partial sync samples.

The problem I found is that packet_index_create_video() marks all
frames as keyframes when there are not stss entries. Trivial fix:

-    else if(!stss)
+    else if(!stss && !stps)

Patch attached

Thanks,
Erik