#5514: Interlaced HEVC Steam not Decoded Properly
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Reporter: jlsantiago0 | Owner:
Type: defect | Status: open
Priority: normal | Component: avcodec
Version: git-master | Resolution:
Keywords: hevc | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
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Comment (by dhelsley):
Replying to [comment:6 Balling]:
> Replying to [comment:4 dhelsley]:
> > There are differences. In #4141, according to the comments the stream
in question has field_seq_flag=1 but pic_struct=3, which is improper
syntax, and the reference decoder does the same thing as FFMPEG (output
half-height frames).
> >
> > With this particular elementary stream, field_seq_flag=1 and
pic_struct=1 or 2 depending on which field it is, which is valid
interlaced syntax. The reference decoder produces proper interlaced output
frames with this test vector.
>
> Please can you look into this example https://yadi.sk/d/bQkXgt900uEdkg
(DVB-T2 ts stream from Ostankino, USSR channel 58, Russia)? Is it the
second as well? BTW, about reference decoder, is that this one?
https://sourceforge.net/p/mjpeg/mailman/message/9927377/ or what?
Wow, old bug.
Your stream has field_seq_flag=1 and pic_struct=10,11 which is similar to
our case (pic_struct=1,2 is top/bottom field, pic_struct=10,11 is top with
next bottom/bottom with previous top or Top Field First).
Reference software can be found here https://hevc.hhi.fraunhofer.de/
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Ticket URL: <https://trac.ffmpeg.org/ticket/5514#comment:7>
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