* [FFmpeg-devel] [PATCH] WIP: avcodec/nvenc: add b_adapt option for HEVC encoder (PR #21167)
@ 2025-12-11 11:26 Diego de Souza via ffmpeg-devel
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From: Diego de Souza via ffmpeg-devel @ 2025-12-11 11:26 UTC (permalink / raw)
To: ffmpeg-devel; +Cc: Diego de Souza
PR #21167 opened by Diego de Souza (ddesouza)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21167
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21167.patch
The b_adapt option allows users to control adaptive B-frame decision
when lookahead is enabled in HEVC encoding. This feature was already
available for H.264 and AV1 encoders, but was missing from HEVC.
Signed-off-by: Diego de Souza <ddesouza@nvidia.com>
>From f2a67cb67da9551e7f38f872aaa2b4f14ea6b509 Mon Sep 17 00:00:00 2001
From: Diego de Souza <ddesouza@nvidia.com>
Date: Thu, 11 Dec 2025 12:07:25 +0100
Subject: [PATCH] avcodec/nvenc: add b_adapt option for HEVC encoder
The b_adapt option allows users to control adaptive B-frame decision
when lookahead is enabled in HEVC encoding. This feature was already
available for H.264 and AV1 encoders, but was missing from HEVC.
Signed-off-by: Diego de Souza <ddesouza@nvidia.com>
---
libavcodec/nvenc_hevc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavcodec/nvenc_hevc.c b/libavcodec/nvenc_hevc.c
index 54e2fe323e..b75ddd1107 100644
--- a/libavcodec/nvenc_hevc.c
+++ b/libavcodec/nvenc_hevc.c
@@ -136,7 +136,8 @@ static const AVOption options[] = {
OFFSET(no_scenecut), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "forced-idr", "If forcing keyframes, force them as IDR frames.",
OFFSET(forced_idr), AV_OPT_TYPE_BOOL, { .i64 = 0 }, -1, 1, VE },
- { "spatial_aq", "set to 1 to enable Spatial AQ", OFFSET(aq), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
+ { "b_adapt", "When lookahead is enabled, set this to 0 to disable adaptive B-frame decision",
+ OFFSET(b_adapt), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE },
{ "spatial-aq", "set to 1 to enable Spatial AQ", OFFSET(aq), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "temporal_aq", "set to 1 to enable Temporal AQ", OFFSET(temporal_aq), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "temporal-aq", "set to 1 to enable Temporal AQ", OFFSET(temporal_aq), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
--
2.49.1
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2025-12-11 11:26 [FFmpeg-devel] [PATCH] WIP: avcodec/nvenc: add b_adapt option for HEVC encoder (PR #21167) Diego de Souza via ffmpeg-devel
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