[FFmpeg-devel] [PATCH 09/13] lavc/videotoolboxenc: Add keyframes_only property

[Rick Kern]

Outputs only I-frames when set.

Signed-off-by: Rick Kern <kernrj at gmail.com>
---
 libavcodec/videotoolboxenc.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/libavcodec/videotoolboxenc.c b/libavcodec/videotoolboxenc.c
index 5430479..c9a60b7 100644
--- a/libavcodec/videotoolboxenc.c
+++ b/libavcodec/videotoolboxenc.c
@@ -77,6 +77,7 @@ typedef struct VTEncContext {
     int64_t level;
 
     int64_t entropy;
+    int64_t keyframes_only;
     int64_t realtime;
 
     bool flushing;
@@ -728,6 +729,16 @@ static av_cold int vtenc_init(AVCodecContext *avctx)
         }
     }
 
+    if (vtctx->keyframes_only == 1) {
+        status = VTSessionSetProperty(vtctx->session,
+                                      kVTCompressionPropertyKey_AllowTemporalCompression,
+                                      kCFBooleanFalse);
+
+        if (status) {
+            av_log(avctx, AV_LOG_ERROR, "Error setting keyframes_only property: %d\n", status);
+        }
+    }
+
     if (!vtctx->has_b_frames) {
         status = VTSessionSetProperty(vtctx->session,
                                       kVTCompressionPropertyKey_AllowFrameReordering,
@@ -1532,6 +1543,7 @@ static const AVOption options[] = {
     { "cavlc", "CAVLC entropy coding", 0, AV_OPT_TYPE_CONST, { .i64 = VT_CAVLC }, INT_MIN, INT_MAX, VE, "entropy" },
     { "cabac", "CABAC entropy coding", 0, AV_OPT_TYPE_CONST, { .i64 = VT_CABAC }, INT_MIN, INT_MAX, VE, "entropy" },
 
+    { "keyframes_only", "Output only I-frames", OFFSET(keyframes_only), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VE },
     { "realtime", "Hint that encoding should happen in real-time if not faster (e.g. capturing from camera).",
         OFFSET(realtime), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VE },
 
-- 
2.7.4