[FFmpeg-devel] Why does ffmpeg h264 decoder stop decoding when certain type of packets are coming in the input stream?

[Naveed Basha]

Hi,

I was debugging the issue to find out that when there are certain IDR (PPS)
AVPackets in the stream the h264 decoder stops decoding AVPackets after
that.
I am unclear as to if there is something wrong with ffmpeg h264 decoder and
needs a fix or if it is a normal behavior and application programmer has to
adopt some logic?
Could someone please help me with this?


On Sat, Jul 28, 2018 at 6:27 PM Naveed Basha <naveedbasha at gmail.com> wrote:

> Yes, please find the test stream here. I was using ffmpeg v3.4.2.
>
> https://drive.google.com/open?id=1rHCfG4csA3rB4LSgErEBn1F3WfI5nUVr
>
> On Sat, Jul 28, 2018 at 6:36 AM Michael Niedermayer <michael at niedermayer.cc>
> wrote:
>
>> On Fri, Jul 27, 2018 at 05:27:44PM +0530, Naveed Basha wrote:
>> > Hi All,
>> >
>> > I used av_read_frame to get the AVPacket from encoded h264 file. But
>> when
>> > this packet (00 00 01 05 94 5a 33 e7 4d 6b d7 ad 13 86 ff 47 83 93 31
>> f1 e3
>> > 0a) is in the input stream (h264 video) ffmpeg decoder stops decoding
>> > frames for any subsequent AVPackets. But if I skip this packet to
>> provide
>> > to the decoder the next AVPackets decode just fine.
>> >
>> > Could you please help me to find what is wrong with this packet? Or
>> what is
>> > wrong with the ffmpeg decoder?
>> > Thanks,
>> > Naveed
>>
>> do you have some testcase for reproducing this ?
>>
>> thx
>>
>> [...]
>> --
>> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
>>
>> Why not whip the teacher when the pupil misbehaves? -- Diogenes of Sinope
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>>
>
>
> --
> Cheers,
> Naveed
>


-- 
Cheers,
Naveed