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new 5f998e304d avcodec/nvenc: fix b_ref_mode capability check
5f998e304d is described below
commit 5f998e304dfd3fd6c0455447bffba45145ba027d
Author: Timo Rothenpieler <[email protected]>
AuthorDate: Mon May 25 17:48:42 2026 +0200
Commit: Timo Rothenpieler <[email protected]>
CommitDate: Wed Jun 10 20:17:44 2026 +0200
avcodec/nvenc: fix b_ref_mode capability check
Turns out it's a bitfield, not straight values.
Fixes #23061
---
libavcodec/nvenc.c | 24 ++++++++++++++++++------
1 file changed, 18 insertions(+), 6 deletions(-)
diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c
index 4c59034af7..6c948f2de8 100644
--- a/libavcodec/nvenc.c
+++ b/libavcodec/nvenc.c
@@ -591,12 +591,24 @@ static int nvenc_check_capabilities(AVCodecContext *avctx)
#ifdef NVENC_HAVE_BFRAME_REF_MODE
tmp = (ctx->b_ref_mode >= 0) ? ctx->b_ref_mode :
NV_ENC_BFRAME_REF_MODE_DISABLED;
ret = nvenc_check_cap(avctx, NV_ENC_CAPS_SUPPORT_BFRAME_REF_MODE);
- if (tmp == NV_ENC_BFRAME_REF_MODE_EACH && ret != 1 && ret != 3) {
- av_log(avctx, AV_LOG_WARNING, "Each B frame as reference is not
supported\n");
- return AVERROR(ENOSYS);
- } else if (tmp != NV_ENC_BFRAME_REF_MODE_DISABLED && ret == 0) {
- av_log(avctx, AV_LOG_WARNING, "B frames as references are not
supported\n");
- return AVERROR(ENOSYS);
+ switch (tmp) {
+ case NV_ENC_BFRAME_REF_MODE_DISABLED:
+ break;
+ case NV_ENC_BFRAME_REF_MODE_EACH:
+ if (!(ret & 1)) {
+ av_log(avctx, AV_LOG_WARNING, "Each B frame reference mode is not
supported\n");
+ return AVERROR(ENOSYS);
+ }
+ break;
+ case NV_ENC_BFRAME_REF_MODE_MIDDLE:
+ if (!(ret & 2)) {
+ av_log(avctx, AV_LOG_WARNING, "Middle B frame reference mode is
not supported\n");
+ return AVERROR(ENOSYS);
+ }
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Unknown B frame reference mode!\n");
+ return AVERROR_BUG;
}
#else
tmp = (ctx->b_ref_mode >= 0) ? ctx->b_ref_mode : 0;
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