[FFmpeg-devel] [PATCH] lavfi/vf_vpp_qsv: fix the infinite loop while framerate lower than input

[Zhong Li]

> > I can't see the benefit to use MSDK framerate conversion function. Is
> > it a good idea to drop it and use ffmpeg native fps filter instead?
>
> The implementation of FRC inside MSDK is quite straight-forward or simple
> currently since it just drops or repeats frames, hence I think using native fps
> filter is a good idea for decoding + FRC or FRC + encoding.
>
> However, for a pure hardware transcoding pipeline, there may be some
> performance issues if inserting a software filter, extra memory copy would
> be introduced in hwdownload/hwupload between system memory and video
> memory, which would impact a lot for large resolutions.
IIRC, it is not necessary to insert hwdownload/upload to use fps filter. No ？