Ping.
> On Apr 27, 2021, at 1:09 PM, Zhao Zhili <quinkbl...@foxmail.com> wrote:
>
> From: zhilizhao <zhiliz...@tencent.com>
>
> Simple test results:
>
> Command:
> ./ffmpeg -y -hwaccel videotoolbox -hwaccel_output_format videotoolbox_vld \
> -i test.mp4 -an -c:v h264_videotoolbox -benchmark out.mp4
>
> Before:
> frame= 1221 fps= 66 q=-0.0 Lsize= 3144kB time=00:00:20.33
> bitrate=1266.6kbits/s dup=4 drop=0 speed= 1.1x
> bench: utime=2.714s stime=1.218s rtime=18.574s
>
> After:
> frame= 1221 fps=137 q=-0.0 Lsize= 3144kB time=00:00:20.33
> bitrate=1266.4kbits/s dup=4 drop=0 speed=2.28x
> bench: utime=1.450s stime=1.440s rtime=8.924s
>
> It has limited usecase since there is no video filter support, so
> a log message is added to notify the user.
> ---
> It has a good performance with limited usecases like transcoding without
> autoscale/autorotate, and I don't know if it break some special usecase,
> since the RFC.
>
> fftools/ffmpeg_videotoolbox.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/fftools/ffmpeg_videotoolbox.c b/fftools/ffmpeg_videotoolbox.c
> index a6b78d0f7d..4ba8618539 100644
> --- a/fftools/ffmpeg_videotoolbox.c
> +++ b/fftools/ffmpeg_videotoolbox.c
> @@ -29,6 +29,7 @@
>
> typedef struct VTContext {
> AVFrame *tmp_frame;
> + int log_once;
> } VTContext;
>
> char *videotoolbox_pixfmt;
> @@ -44,6 +45,13 @@ static int videotoolbox_retrieve_data(AVCodecContext *s,
> AVFrame *frame)
> int linesize[4] = { 0 };
> int planes, ret, i;
>
> + if (frame->format == ist->hwaccel_output_format) {
> + av_log_once(s, AV_LOG_INFO, AV_LOG_TRACE, &vt->log_once,
> + "There is no video filter for videotoolbox pix_fmt now, remove
> the "
> + "-hwaccel_output_format option if video filter doesn't work\n");
> + return 0;
> + }
> +
> av_frame_unref(vt->tmp_frame);
>
> switch (pixel_format) {
> --
> 2.31.1
>
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