[FFmpeg-trac] #8442(undetermined:new): CUDA mpeg2-decode issue (hwaccel)
FFmpeg
trac at avcodec.org
Tue Dec 24 18:28:38 EET 2019
#8442: CUDA mpeg2-decode issue (hwaccel)
-------------------------------------+-------------------------------------
Reporter: barhom | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
The new CUDA HW mpeg2 decoder is producing bad and pixelated decoding on
some video.
The legacy CUVID mpeg2_cuvid decoder is producing expected output.
The testing has been made with a NVIDIA GTX 1050 Ti GPU with Driver
version 440.31 and Cuda 10.2.
FFmpeg version used: git-2019-11-13-a7245ad
How to reproduce:
Bad output:
{{{
ffmpeg -y -hwaccel cuda -i "/tmp/original_cut.ts" -c:v h264_nvenc -c:a aac
-b:a:0 64k -f mpegts /tmp/mpeg2_cuda_decode.ts
}}}
Good output:
{{{
ffmpeg -y -hwaccel cuvid -c:v mpeg2_cuvid -i "/tmp/original_cut.ts" -c:v
h264_nvenc -c:a aac -b:a:0 64k -f mpegts
/tmp/mpeg2_cuvid_legacy_decode.ts
}}}
I have attached "original_cut.ts" for you to be able to reproduce this
issue.
Also attached the output when running the commands on my system.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8442>
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