Hi,

i can't change HEVC bitrate when rendering using hevc_vaapi codec.

Code: Select all

f=mp4 movflags=+faststart hwaccel_device=/dev/dri/renderD128 vf='format=nv12,hwupload' c:v=hevc_vaapi vcodec=hevc_vaapi crf=15 threads=4 preset=medium g=12 bf=2 acodec=aac ab=256k

Final video stays at only 4Mbit/s

Code: Select all

f=mp4 movflags=+faststart hwaccel_device=/dev/dri/renderD128 vf='format=nv12,hwupload' c:v=hevc_vaapi vcodec=hevc_vaapi vb=15M threads=4 preset=medium g=12 bf=2 acodec=aac ab=256k

Final video stays at only 4Mbit/s

It does work using h264_vaapi codec.

What's the correct parameter for hevc_vaapi codec to change video bitrate?


pappl
Is there

Bitrate change doesn't work.
Tried
vb=10M
b:v=10M
crf=15
crf=30

Found this bug documentation, but no fix:
https://www.mail-archive.com/ffmpeg-trac@avcodec.org/msg45416.html