Shane Warren wrote:
> The -noautoscale seems to have fixed the stop/crash on resolution
> changing. I can now hw decode using vaapi, then deinterlace/scale,
> then qsv encode. I have a capture on an input stream that does all
> kinds of horrible things (switches resolution and goes interlaced), I
> have looped that many times and the output is stable.
>
> The autoscale/noautoscale option should be in the ffmpeg html
> documents online somewhere, that option is very useful for anyone
> transcoding live streams that change resolutions.
The option is already described in the documentation.
Quote:
-autoscale
Automatically scale the video according to the resolution of
first frame. Enabled by default, use -noautoscale to disable
it. When autoscale is disabled, all output frames of filter
graph might not be in the same resolution and may be inadequate
for some encoder/muxer. Therefore, it is not recommended to
disable it unless you really know what you are doing. Disable
autoscale at your own risk.
Actually I'm surprised that -noautoscale fixes your problem.
The default (-autoscale) should be the right one for streams that
change resolution. Maybe there is a peculiarity with the QSV code
that requires -noautoscale.
Best regards
-- Oliver
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