@@ -59,6 +59,7 @@ typedef struct VAAPIEncodeH264Context {
int profile;
int level;
int mb_rate_control;
+ int sliding_window;
// Derived settings.
int mb_width;
@@ -903,6 +904,16 @@ static av_cold int vaapi_encode_h264_bit_rate_control(AVCodecContext *avctx)
"supported with this VAAPI version.\n");
#endif
}
+
+ if (priv->sliding_window) {
+#if VA_CHECK_VERSION(1, 1, 0)
+ ctx->rc_params.rc.rc_flags.bits.frame_tolerance_mode = priv->sliding_window;
+#else
+ av_log(avctx, AV_LOG_WARNING, "The sliding window is not "
+ "supported with this VAAPI version.\n");
+#endif
+ }
+
return 0;
}
@@ -1022,6 +1033,8 @@ static const AVOption vaapi_encode_h264_options[] = {
OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
{ "mb_rate_control", "MB level bitrate control (only supported on GEN9+)",
OFFSET(mb_rate_control), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS, "mb_rate_control" },
+ { "sliding_window", "Use sliding window to reduce the instant bitrate fluctuations",
+ OFFSET(sliding_window), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS, "sliding_window" },
{ "coder", "Entropy coder type",
OFFSET(coder), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS, "coder" },
{ "cavlc", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS, "coder" },
Sliding window control is a feature to reduce the instant bitrate fluctuation, and occasional big frame size for intra and scene change frames are allowed. And the fluctuation level can be controlled by max bit rate. Signed-off-by: Jun Zhao <jun.zhao@intel.com> --- libavcodec/vaapi_encode_h264.c | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-)