[FFmpeg-devel] [PATCH 2/2] lavc/videotoolboxenc: enable low-latency mode for HEVC

[Zhao Zhili]

> From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of Jun Zhao
> Sent: 2023年8月31日 22:50
> To: ffmpeg-devel at ffmpeg.org
> Cc: Jun Zhao <barryjzhao at tencent.com>; Jun Zhao <mypopydev at gmail.com>
> Subject: [FFmpeg-devel] [PATCH 2/2] lavc/videotoolboxenc: enable low-latency mode for HEVC
> 
> Enable the HEVC encoder that supports low-latency mode.
> 
> Signed-off-by: Jun Zhao <barryjzhao at tencent.com>
> ---
>  libavcodec/videotoolboxenc.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/libavcodec/videotoolboxenc.c b/libavcodec/videotoolboxenc.c
> index 8e493c4f7a..bfc03787a0 100644
> --- a/libavcodec/videotoolboxenc.c
> +++ b/libavcodec/videotoolboxenc.c
> @@ -1568,7 +1568,8 @@ static int vtenc_configure_encoder(AVCodecContext *avctx)
>  #endif
> 
>      // low-latency mode: eliminate frame reordering, follow a one-in-one-out encoding mode
> -    if ((avctx->flags & AV_CODEC_FLAG_LOW_DELAY) && avctx->codec_id == AV_CODEC_ID_H264) {
> +    if ((avctx->flags & AV_CODEC_FLAG_LOW_DELAY) &&
> +        (avctx->codec_id == AV_CODEC_ID_H264 || avctx->codec_id == AV_CODEC_ID_HEVC)) {

How about just remove the codec_id check?
Is there any unwelcome side effects for encoders other than H264/HEVC?

>          CFDictionarySetValue(enc_info,
>                               compat_keys.kVTVideoEncoderSpecification_EnableLowLatencyRateControl,
>                               kCFBooleanTrue);
> --
> 2.25.1
> 
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