[FFmpeg-user] cuvid-decoding, npp resize, nvenc encoding - "green" output

Aleksey Bragin ab at alfabox.net
Tue Mar 21 10:23:04 EET 2017


I'm trying to transcode couple camera streams on low-end i3 box equipped with nvidia gpu,

but even with latest git version, I'm not able to make it work. My goal is to do decoding, resizing and encoding w/o copying frames to/from ram, according to https://trac.ffmpeg.org/wiki/HWAccelIntro

it should be working if I use cmd like this:
ffmpeg -hwaccel_device 0 -hwaccel cuvid -c:v h264_cuvid -i 'udp://@' -vf scale_npp=-1:360 -vcodec h264_nvenc  -preset slow  -b:v 1200k -bufsize 500k -minrate 1200k -maxrate 1200k  -f mpegts -y 'udp://'

But as soon as I add resize, I get "green" screen effect - <https://www.dropbox.com/s/cvutg01i6crn4nv/Screenshot%202017-03-21%2004.09.24.png?dl=0> http://imgur.com/WljkD6g

without resize filter  - it's working just fine.
I've also tried using solution from https://trac.ffmpeg.org/ticket/5587

but even if I found pixel format which is accepted, results are the same.

I believe that problem is somewhere in pixel format, but can't figure out what I'm missing :(

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