[Libav-user] HEVC 2/3 of the frame is green

[Michael Wood]

On Thu, Mar 23, 2023 at 8:06 PM Strahinja Radman <dr.strashni at gmail.com>
wrote:

>
>
> On Thu, 23 Mar 2023 at 20:05, Michael Wood <mornwood23 at gmail.com> wrote:
>
>>
>>
>> On Thu, Mar 23, 2023 at 6:20 PM Michael Wood <mornwood23 at gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> I'm having a weird issue with the decoding of *H265* *4K stream* where
>>> 1/3 of the frame is rendered normally and the other 2/3 is in green (
>>> https://ibb.co/C8yFygm). This only happens if i try to decode *4K*
>>> stream, for non *4K* streams everything works as expected.
>>>
>>> I'm using *live555* library to get stream from *RTSP* server after
>>> which packets are sent to the *ffmpeg* to be decoded and later rendered
>>>
>>> *DESCRIBE* response contains all required *VPS,SPS,PPS* fields that are
>>> passed as extra data to the codec context.
>>>
>>> This is what is returned from *DESCRIBE*:
>>>
>>> v=0
>>> o=- 1679598602413481 1679598602413481 IN IP4 192.168.1.212
>>> s=Media Presentation
>>> e=NONE
>>> b=AS:5050
>>> t=0 0
>>> a=control:rtsp://
>>> 192.168.1.212/Streaming/Channels/101/?transportmode=unicast&profile=Profile_1
>>> m=video 0 RTP/AVP 96
>>> c=IN IP4 0.0.0.0
>>> b=AS:5000
>>> a=recvonly
>>> a=x-dimensions:3840,2160
>>> a=control:rtsp://
>>> 192.168.1.212/Streaming/Channels/101/trackID=1?transportmode=unicast&profile=Profile_1
>>> a=rtpmap:96 H265/90000
>>> a=fmtp:96 sprop-vps=QAEMA///AWAAAAMAgAAAAwAAAwCWAAC94Eg=;
>>> sprop-sps=QgEDAWAAAAMAgAAAAwAAAwCWAACgAeAgAhx/jb33am7uS/YC3AQEBBAAAD6AAALuByHe5RAAmRgACsPgAEyMAAVh8EACZGAAKw+AATIwABWHwg==;
>>> sprop-pps=RAHBcrCcCgFGZA==
>>>
>>> a=Media_header:MEDIAINFO=494D4B48010300000400050000000000000000000000000081000000000000000000000000000000;
>>> a=appversion:1.0
>>>
>>> When trying to decode packets i'm getting this output from hevc, the
>>> *ffplay/VLC* works normally with the incoming stream.
>>>
>>> [hevc @ 0x14ac15600] nal_unit_type: 32(VPS), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] nal_unit_type: 33(SPS), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] nal_unit_type: 34(PPS), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] Decoding VPS
>>> [hevc @ 0x14ac15600] Main profile bitstream
>>> [hevc @ 0x14ac15600] Decoding SPS
>>> [hevc @ 0x14ac15600] Main profile bitstream
>>> [hevc @ 0x14ac15600] Decoding VUI
>>> [hevc @ 0x14ac15600] Decoding PPS
>>> [hevc @ 0x14ac15600] nal_unit_type: 32(VPS), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] Decoding VPS
>>> [hevc @ 0x14ac15600] Main profile bitstream
>>> [hevc @ 0x14ac15600] nal_unit_type: 33(SPS), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] Decoding SPS
>>> [hevc @ 0x14ac15600] Main profile bitstream
>>> [hevc @ 0x14ac15600] Decoding VUI
>>> [hevc @ 0x14ac15600] nal_unit_type: 34(PPS), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] Decoding PPS
>>> [hevc @ 0x14ac15600] nal_unit_type: 19(IDR_W_RADL), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] Format yuvj420p chosen by get_format().
>>> [hevc @ 0x14ac15600] Output frame with POC 0.
>>> [hevc @ 0x14ac15600] nal_unit_type: 19(IDR_W_RADL), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] First slice in a frame missing.
>>> [hevc @ 0x14ac15600] nal_unit_type: 19(IDR_W_RADL), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] First slice in a frame missing.
>>> [hevc @ 0x14ac15600] nal_unit_type: 32(VPS), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] Decoding VPS
>>> [hevc @ 0x14ac15600] Main profile bitstream
>>> [hevc @ 0x14ac15600] nal_unit_type: 33(SPS), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] Decoding SPS
>>> [hevc @ 0x14ac15600] Main profile bitstream
>>> [hevc @ 0x14ac15600] Decoding VUI
>>> [hevc @ 0x14ac15600] nal_unit_type: 34(PPS), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] Decoding PPS
>>> [hevc @ 0x14ac15600] nal_unit_type: 19(IDR_W_RADL), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] Output frame with POC 0.
>>> [hevc @ 0x14ac15600] nal_unit_type: 19(IDR_W_RADL), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] First slice in a frame missing.
>>> [hevc @ 0x14ac15600] nal_unit_type: 19(IDR_W_RADL), nuh_layer_id: 0,
>>> temporal_id: 0
>>> [hevc @ 0x14ac15600] First slice in a frame missing.
>>> [hevc @ 0x14ac15600] nal_unit_type: 1(TRAIL_R), nuh_layer_id: 0,
>>> temporal_id: 2
>>> [hevc @ 0x14ac15600] Output frame with POC 1.
>>> [hevc @ 0x14ac15600] nal_unit_type: 1(TRAIL_R), nuh_layer_id: 0,
>>> temporal_id: 2
>>> [hevc @ 0x14ac15600] First slice in a frame missing.
>>> [hevc @ 0x14ac15600] nal_unit_type: 1(TRAIL_R), nuh_layer_id: 0,
>>> temporal_id: 2
>>> [hevc @ 0x14ac15600] First slice in a frame missing.
>>> [hevc @ 0x14ac15600] nal_unit_type: 1(TRAIL_R), nuh_layer_id: 0,
>>> temporal_id: 2
>>> [hevc @ 0x14ac15600] Output frame with POC 2.
>>> [hevc @ 0x14ac15600] nal_unit_type: 1(TRAIL_R), nuh_layer_id: 0,
>>> temporal_id: 2
>>> [hevc @ 0x14ac15600] First slice in a frame missing.
>>> [hevc @ 0x14ac15600] nal_unit_type: 1(TRAIL_R), nuh_layer_id: 0,
>>> temporal_id: 2
>>> [hevc @ 0x14ac15600] First slice in a frame missing.
>>>
>>> If I write the stream to the file and play that file either through
>>> *ffplay* or *VLC* the frames are rendered normally.
>>>
>>> Any suggestion would be welcomed.
>>>
>>> Thanks,
>>> Milos
>>>
>>
>>  Hey Strahinja,
>>
>> Thanks for the answer,
>>
>> Can you provide more info on how to do it ?
>>
>> Best,
>> Milos
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> Hey Milos,
>
> In AVFrame structure, check width, height and stride variables.
>
>
> --
>
> Regards
> Strahinja Radman
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>

Hey Strahinja,

It seems that both width & height are set correctly. I can't find stride, i
don't see any reference to it in the AVFrame header.

Thanks,
Milos
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