[FFmpeg-user] (no subject)

[Michael Koch]

Am 26.01.2021 um 01:09 schrieb owen s:
> I am running this command
>
> ffmpeg-git -y \
> -vaapi_device /dev/dri/renderD128 \
> -framerate 60 -i ./image.jpg \
> -stream_loop -1 -i ./audio.mp3 \
> -map 0:v \
> -c:v h264_vaapi \
> -vf
> 'crop=2560:1440:0:0,format=nv12|vaapi,hwupload,loop=loop=-1:size=1:start=0,hwdownload,format=yuv420p'
> \
> -rc_mode 2 -b:v 20M \
> -c:v libx264 \
> -map 1:a \
> -c:a libfdk_aac -b:a 128k -ar 44100 -ac 2 \
> -af "dynaudnorm=f=150:g=15" \
> -f flv /dev/null
>
> the encoding speed is very fast, typically 1.78x
>
> frame=2512127 fps=107 q=0.0 size=56457493kB time=11:37:47.36
> bitrate=11046.8kbits/s speed=1.79x
>
> Is there any way to limit this speed to a standard 1x?

You could try the -re option. The documentation says it's not suitable 
for all types of input streams. I'm not sure if it works with your input.

Michael