[FFmpeg-user] A query on slice based encoding in vp9_vaapi

Xiang, Haihao haihao.xiang at intel.com
Tue Jun 18 06:13:40 EEST 2019

Hi Dennis,

Sorry for slow response. Unlike h265/h264, VP9 doesn't have slice. 


> Hello there,
> According to the VAAPI encoder docs, slice based encoding can be enabled
> for the respective encoders via the -slices:v n where n is the number of
> slices so desired.
> However, toggling this option on for the vp9_vaapi encoder results in a
> warning on initialization about slice based encoding not being supported,
> but the encoder runs nonetheless to completion.
> I’ll post the console output (and ffmpeg build version ) when I’m at the
> desk, but the question remains: Is there a specific reason as to why slice
> based encoding is disabled (or not implemented) in this encoder?
> This query is a redirect from this issue on the intel vaapi driver project
> https://github.com/intel/intel-vaapi-driver/issues/452 as they may be
> related. If this isn’t the right place to ask this question, let me know.

More information about the ffmpeg-user mailing list