[FFmpeg-devel] [PATCH] avcodec/nvenc: Fix MV-HEVC encoding display SEI handling

[FFmpeg-devel] [PATCH] avcodec/nvenc: Fix MV-HEVC encoding display SEI handling

[Diego Felix de Souza via ffmpeg-devel]

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From: <ddesouza@nvidia.com>
To: <ffmpeg-devel@ffmpeg.org>
Cc: Diego de Souza <ddesouza@nvidia.com>
Subject: [PATCH] avcodec/nvenc: Fix MV-HEVC encoding display SEI handling
Date: Tue, 8 Jul 2025 16:06:50 +0200
Message-ID: <20250708140650.98575-1-ddesouza@nvidia.com>

From: Diego de Souza <ddesouza@nvidia.com>

Remove redundant display_sei_sent flag for 3D reference display info
handling in MV-HEVC encoding. The display SEI must be sent for every
frame in the multi-view sequence.

Signed-off-by: Diego de Souza <ddesouza@nvidia.com>
---
 libavcodec/nvenc.c | 4 +---
 libavcodec/nvenc.h | 1 -
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c
index a2457523b1..50e9a2f33a 100644
--- a/libavcodec/nvenc.c
+++ b/libavcodec/nvenc.c
@@ -3205,14 +3205,12 @@ static int nvenc_send_frame(AVCodecContext *avctx, const AVFrame *frame)
                 }

                 pic_params.codecPicParams.hevcPicParams.p3DReferenceDisplayInfo = &ref_disp_info;
-                ctx->display_sei_sent = 1;
-            } else if (!ctx->display_sei_sent) {
+            } else {
                 ref_disp_info.precRefDisplayWidth = 31;
                 ref_disp_info.leftViewId[0] = 0;
                 ref_disp_info.rightViewId[0] = 1;

                 pic_params.codecPicParams.hevcPicParams.p3DReferenceDisplayInfo = &ref_disp_info;
-                ctx->display_sei_sent = 1;
             }

             ctx->next_view_id = !ctx->next_view_id;
diff --git a/libavcodec/nvenc.h b/libavcodec/nvenc.h
index 4a4d6730b1..6c44182333 100644
--- a/libavcodec/nvenc.h
+++ b/libavcodec/nvenc.h
@@ -319,7 +319,6 @@ typedef struct NvencContext
     int mdm, cll;
     int cbr_padding;
     int multiview, multiview_supported;
-    int display_sei_sent;
 } NvencContext;

 int ff_nvenc_encode_init(AVCodecContext *avctx);
--
2.39.5 (Apple Git-154)

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Re: [FFmpeg-devel] [PATCH] avcodec/nvenc: Fix MV-HEVC encoding display SEI handling

[Timo Rothenpieler]

looks good to me, will apply
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