[FFmpeg-devel] [PATCH] avcodec/videotoolboxenc: add low-latency encoding

[xufuji456]

Signed-off-by: xufuji456 <839789740 at qq.com>
---
 libavcodec/videotoolboxenc.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/libavcodec/videotoolboxenc.c b/libavcodec/videotoolboxenc.c
index c6f22723d6..88334f1851 100644
--- a/libavcodec/videotoolboxenc.c
+++ b/libavcodec/videotoolboxenc.c
@@ -251,6 +251,8 @@ typedef struct VTEncContext {
 
     /* can't be bool type since AVOption will access it as int */
     int a53_cc;
+
+    int low_latency;
 } VTEncContext;
 
 static int vtenc_populate_extradata(AVCodecContext   *avctx,
@@ -1441,6 +1443,16 @@ static int vtenc_create_encoder(AVCodecContext   *avctx,
         }
     }
 
+    if (vtctx->low_latency) {
+        status = VTSessionSetProperty(vtctx->session,
+                                      kVTVideoEncoderSpecification_EnableLowLatencyRateControl,
+                                      kCFBooleanTrue);
+
+        if (status) {
+            av_log(avctx, AV_LOG_ERROR, "Error setting low latency property: %d\n", status);
+        }
+    }
+
     status = VTCompressionSessionPrepareToEncodeFrames(vtctx->session);
     if (status) {
         av_log(avctx, AV_LOG_ERROR, "Error: cannot prepare encoder: %d\n", status);
-- 
2.32.0 (Apple Git-132)