VideoToolbox doesn't allow us to specify an exact number of ref frames,
but it does allow an upper limit to be specified which is better than
nothing.
Signed-off-by: Cameron Gutman <aicomman...@gmail.com>
---
libavcodec/videotoolboxenc.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/libavcodec/videotoolboxenc.c b/libavcodec/videotoolboxenc.c
index da7b291b03..9605657712 100644
--- a/libavcodec/videotoolboxenc.c
+++ b/libavcodec/videotoolboxenc.c
@@ -1588,11 +1588,12 @@ static int vtenc_create_encoder(AVCodecContext *avctx,
vtctx->power_efficient ? kCFBooleanTrue :
kCFBooleanFalse);
}
- if (vtctx->max_ref_frames > 0) {
+ if (vtctx->max_ref_frames > 0 || avctx->refs > 0) {
+ int max_ref_frames = avctx->refs > 0 ? avctx->refs :
vtctx->max_ref_frames;
status = set_encoder_int_property_or_log(avctx,
compat_keys.kVTCompressionPropertyKey_ReferenceBufferCount,
"max_ref_frames",
- vtctx->max_ref_frames);
+ max_ref_frames);
if (status != 0) {
return status;
@@ -2940,6 +2941,7 @@ static const FFCodecDefault vt_defaults[] = {
{"b", "0"},
{"qmin", "-1"},
{"qmax", "-1"},
+ {"refs", "0"},
{NULL},
};
--
2.43.0.windows.1
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