[FFmpeg-devel] [PATCH] nvenc: Make AUD optional for h264_nvenc and hevc_nvenc

Mark Thompson sw at jkqxz.net
Fri Dec 30 16:32:47 EET 2016


On 29/12/16 21:02, Miroslav SlugeĊˆ wrote:
> Somebody changed AUD to active in NVENC by default, which is not very clever, libx264 also has this future disabled, so we should stay in sync with libx264 behavior.
> 
> Enabled AUD will work only without B-frames. There is BUG in Nvidia NVENC when you use AUD for H264 with B-frames, it will return corrupted stream, because NVIDIA is inserting AUD type 0 (I-frame) before B-frames instead of AUD type 7 (any-frame).
> 
> H264 encoded with B-frames and AUD active will not play for example on Panasonic TX-AS640E, other decoders just ignore wrong AUD type.
> 
> From 8205523dfa477eaaeda3e10d59a42e024dafbfdb Mon Sep 17 00:00:00 2001
> From: Miroslav Slugen <thunder.m at email.cz>
> Date: Thu, 29 Dec 2016 21:50:13 +0100
> Subject: [PATCH 1/1] NVENC: Make AUD optional
> 
> ---
>  libavcodec/nvenc.c      | 4 ++--
>  libavcodec/nvenc.h      | 1 +
>  libavcodec/nvenc_h264.c | 1 +
>  libavcodec/nvenc_hevc.c | 1 +
>  4 files changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c
> index f64fd8a..d57a90c 100644
> --- a/libavcodec/nvenc.c
> +++ b/libavcodec/nvenc.c
> @@ -756,7 +756,7 @@ static av_cold int nvenc_setup_h264_config(AVCodecContext *avctx)
>  
>      h264->disableSPSPPS = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 1 : 0;
>      h264->repeatSPSPPS  = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 0 : 1;
> -    h264->outputAUD     = 1;
> +    h264->outputAUD     = (ctx->aud == 1) ? 1 : 0;

Just write ctx->aud, no need for the conditional.

>  
>      if (avctx->refs >= 0) {
>          /* 0 means "let the hardware decide" */
> @@ -840,7 +840,7 @@ static av_cold int nvenc_setup_hevc_config(AVCodecContext *avctx)
>  
>      hevc->disableSPSPPS = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 1 : 0;
>      hevc->repeatSPSPPS  = (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) ? 0 : 1;
> -    hevc->outputAUD     = 1;
> +    hevc->outputAUD     = (ctx->aud == 1) ? 1 : 0;

Similarly here.

>  
>      if (avctx->refs >= 0) {
>          /* 0 means "let the hardware decide" */
> diff --git a/libavcodec/nvenc.h b/libavcodec/nvenc.h
> index 5bc0cba..c435e05 100644
> --- a/libavcodec/nvenc.h
> +++ b/libavcodec/nvenc.h
> @@ -153,6 +153,7 @@ typedef struct NvencContext
>      int strict_gop;
>      int aq_strength;
>      int quality;
> +    int aud;
>  } NvencContext;
>  
>  int ff_nvenc_encode_init(AVCodecContext *avctx);
> diff --git a/libavcodec/nvenc_h264.c b/libavcodec/nvenc_h264.c
> index 71e27fd..cae27aa 100644
> --- a/libavcodec/nvenc_h264.c
> +++ b/libavcodec/nvenc_h264.c
> @@ -107,6 +107,7 @@ static const AVOption options[] = {
>                                                              OFFSET(aq_strength),  AV_OPT_TYPE_INT,   { .i64 = 8 }, 1, 15, VE },
>      { "cq",           "Set target quality level (0 to 51, 0 means automatic) for constant quality mode in VBR rate control",
>                                                              OFFSET(quality),      AV_OPT_TYPE_INT,   { .i64 = 0 }, 0, 51, VE },
> +    { "aud",          "Use access unit delimiters",         OFFSET(aud),          AV_OPT_TYPE_BOOL,  { .i64 = 0 }, 0, 1, VE },
>      { NULL }
>  };
>  
> diff --git a/libavcodec/nvenc_hevc.c b/libavcodec/nvenc_hevc.c
> index ef739b6..e44ca7e 100644
> --- a/libavcodec/nvenc_hevc.c
> +++ b/libavcodec/nvenc_hevc.c
> @@ -104,6 +104,7 @@ static const AVOption options[] = {
>                                                              OFFSET(aq_strength),  AV_OPT_TYPE_INT,   { .i64 = 8 }, 1, 15, VE },
>      { "cq",           "Set target quality level (0 to 51, 0 means automatic) for constant quality mode in VBR rate control",
>                                                              OFFSET(quality),      AV_OPT_TYPE_INT,   { .i64 = 0 }, 0, 51, VE },
> +    { "aud",          "Use access unit delimiters",         OFFSET(aud),          AV_OPT_TYPE_BOOL,  { .i64 = 0 }, 0, 1, VE },
>      { NULL }
>  };
>  
> -- 
> 2.1.4
> 

LGTM otherwise.

Thanks,

- Mark


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