[FFmpeg-user] Can Decklink and GPu acceleration be used at same time ??

Carl Eugen Hoyos ceffmpeg at gmail.com
Sun Apr 12 12:08:07 EEST 2020

Am So., 12. Apr. 2020 um 03:58 Uhr schrieb Matthew Reus
<matthew.reus01 at gmail.com>:
> How can we take decklink input from QUAD 2 capture card  and use the gpu
> for transcoding at same time , could anyone provide the example or tutorial
> steps for it , as i have compile ffmpeg with gpu and decklink , but i could
> not use hardware acceleration with decklink input
> i
> *ffmpeg -fflags +genpts -vsync 0 -fflags +genpts -vsync 0 -hwaccel_device 1
> -hwaccel nvdec -hwaccel_output_format cuda -format_code Hi50 -f decklink -i
> 'DeckLink Quad (1)'  -vf "format=yuv420p,yadif=0:-1:0,scale=1920:1080"
>  -b:v 3.5M -bf 1 -aspect 16:9 -profile:v main -preset:v medium -c:v
> h264_nvenc -c:a aac -b:a 128k -ar 48000 -strict -2 -f flv
> 'rtmp://admin:admin@
> <http://admin:admin@>'

Complete, uncut console output missing and please consider to use
file output for testing.
vsync 0 is supposed to lead to A/V desync.

Carl Eugen

More information about the ffmpeg-user mailing list