Somehow it seems, that this patch never got onto the mailing list. So may I
kindly ask you to review it.
--
Stay hungry, stay foolish
> Am 26.01.2022 um 17:31 schrieb Simone Karin Lehmann <sim...@lisanet.de>:
>
>
> The patch adds an option to the hevc_videotoolbox encoder to prioritize speed
> for Macs with Apple Silicon CPU.
>
> This speeds up encodings up to 50% - 70%. In conjunction with the qcale
> option -q, visible quality will be unchanged. The increase in file size is
> very moderate, although still depending on the source material.
>
>
> Signed-off-by: Simone Karin Lehmann <sim...@lisanet.de>
> ---
> libavcodec/videotoolboxenc.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/libavcodec/videotoolboxenc.c b/libavcodec/videotoolboxenc.c
> index 418ff00b8d..ab0dad6cbc 100644
> --- a/libavcodec/videotoolboxenc.c
> +++ b/libavcodec/videotoolboxenc.c
> @@ -236,6 +236,7 @@ typedef struct VTEncContext {
> int allow_sw;
> int require_sw;
> double alpha_quality;
> + int64_t prio_speed;
>
> bool flushing;
> int has_b_frames;
> @@ -1145,6 +1146,17 @@ static int vtenc_create_encoder(AVCodecContext
> *avctx,
> return AVERROR_EXTERNAL;
> }
>
> + // prioritize speed over quality
> + if (vtctx->prio_speed) {
> + status = VTSessionSetProperty(vtctx->session,
> +
> kVTCompressionPropertyKey_PrioritizeEncodingSpeedOverQuality,
> + kCFBooleanTrue);
> + if (status) {
> + av_log(avctx, AV_LOG_ERROR, "Error setting
> PrioritizeEncodingSpeedOverQuality property: %d\n", status);
> + return AVERROR_EXTERNAL;
> + }
> + }
> +
> if ((vtctx->codec_id == AV_CODEC_ID_H264 || vtctx->codec_id ==
> AV_CODEC_ID_HEVC)
> && max_rate > 0) {
> bytes_per_second_value = max_rate >> 3;
> @@ -2744,6 +2756,7 @@ static const AVOption hevc_options[] = {
> { "main10", "Main10 Profile", 0, AV_OPT_TYPE_CONST, { .i64 =
> HEVC_PROF_MAIN10 }, INT_MIN, INT_MAX, VE, "profile" },
>
> { "alpha_quality", "Compression quality for the alpha channel",
> OFFSET(alpha_quality), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, 0.0, 1.0, VE },
> + { "prio_speed", "prioritize encoding speed", OFFSET(prio_speed),
> AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
>
> COMMON_OPTIONS
> { NULL },
> --
> 2.32.0 (Apple Git-132)
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
