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new cb0f4de1f5 avcodec/nvenc_av1: fix b_ref_mode "middle" help string for
AV1
cb0f4de1f5 is described below
commit cb0f4de1f56f8db394b72ad887478d386bcf8e8a
Author: Diego de Souza <[email protected]>
AuthorDate: Tue Feb 17 17:04:18 2026 +0100
Commit: Timo Rothenpieler <[email protected]>
CommitDate: Tue Feb 17 16:36:51 2026 +0000
avcodec/nvenc_av1: fix b_ref_mode "middle" help string for AV1
For AV1, NV_ENC_BFRAME_REF_MODE_MIDDLE does not use a single middle
B-frame. Per the NVENC Programming Guide, it sets every other B-frame
as an Altref2 reference except the last B-frame in the Altref interval.
Signed-off-by: Diego de Souza <[email protected]>
---
libavcodec/nvenc_av1.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/nvenc_av1.c b/libavcodec/nvenc_av1.c
index 446ba684e6..98fcc76e39 100644
--- a/libavcodec/nvenc_av1.c
+++ b/libavcodec/nvenc_av1.c
@@ -143,7 +143,7 @@ static const AVOption options[] = {
{ "b_ref_mode", "Use B frames as references",
OFFSET(b_ref_mode), AV_OPT_TYPE_INT, { .i64 = -1 }, -1,
NV_ENC_BFRAME_REF_MODE_MIDDLE, VE, .unit = "b_ref_mode" },
{ "disabled", "B frames will not be used for reference", 0,
AV_OPT_TYPE_CONST, { .i64 = NV_ENC_BFRAME_REF_MODE_DISABLED }, 0, 0, VE,
.unit = "b_ref_mode" },
{ "each", "Each B frame will be used for reference", 0,
AV_OPT_TYPE_CONST, { .i64 = NV_ENC_BFRAME_REF_MODE_EACH }, 0, 0, VE, .unit =
"b_ref_mode" },
- { "middle", "Only (number of B frames)/2 will be used for
reference", 0,AV_OPT_TYPE_CONST, { .i64 = NV_ENC_BFRAME_REF_MODE_MIDDLE }, 0,
0, VE, .unit = "b_ref_mode" },
+ { "middle", "Every other B-frame as Altref2 reference, except last
in Altref interval", 0, AV_OPT_TYPE_CONST, { .i64 =
NV_ENC_BFRAME_REF_MODE_MIDDLE }, 0, 0, VE, .unit = "b_ref_mode" },
{ "dpb_size", "Specifies the DPB size used for encoding (0 means
automatic)",
OFFSET(dpb_size),
AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
{ "ldkfs", "Low delay key frame scale; Specifies the Scene Change
frame size increase allowed in case of single frame VBV and CBR",
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