2013/4/16 Vittorio Giovara <vittorio.giov...@gmail.com> > On 15/apr/2013, at 16:43, Yusuke Nakamura <muken.the.vfrman...@gmail.com> > wrote: > > > As far as I understand, frame_mbs_only_flag == 1 guarantees that frames > are > > progressive, while frame_mbs_only_flag == 0 doesn't guarantee that a > frame > > is coded as progressive or interlaced. > That's correct, that's why I mentioned field_pic_flag too. When such > flag is set you should also check if tff or bff is set too. >
Check and? Do you want me to override field order by bottom_field_flag or output something as log if mismatched? > And, if CpbDpbDelaysPresentFlag is equal to 1 or pic_struct_present_flag > is > > equal to 1, Picture timing SEI is not optional and it shall be present in > > every access unit. > You are right, when pic_struct_present_flag is 1 it is mandatory to > include the SEI message, however it is not mandatory to set > pic_struct_present_flag at all. > So it is possible to run into interlaced/pulled down streams without > such SEI. In such cases only frame_mbs_only_flag and field_pic_flag > will be able to correctly initialize avfieldorder (again, if my > understanding of the spec is correct). > I can't grasp what you want to say. I already initialized AVFieldOrder by frame_mbs_only_flag, field_pic_flag, bottom_field_flag and POC when pic_struct_present_flag is 0 according to the spec. _______________________________________________ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel
