The BPG standard[1] says P-slices are used, but not B-slices...
[1] sec 3.3 http://bellard.org/bpg/bpg_spec.txt
The BPG standard[1] says P-slices are used, but not B-slices...
[1] sec 3.3 http://bellard.org/bpg/bpg_spec.txt