libavcodec/qsvenc: enable LowDelayBRC and MaxFrameSizeI/MaxFrameSizeP for more accurate bitrate control

Feature introduction of LowDelayBRC, MaxFrameSizeI and MaxFrameSizeP could be found here:
https://github.com/Intel-Media-SDK/MediaSDK/blob/master/doc/mediasdk-man.md

Signed-off-by: Dmitry Ermilov <dmitry.ermilov@intel.com>
Signed-off-by: Fan F He <fan.f.he@intel.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/doc/encoders.texi b/doc/encoders.texi
index a304f865a6..806cc430d4 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -3266,6 +3266,14 @@ Enable rate distortion optimization.
 @item @var{max_frame_size}
 Maximum encoded frame size in bytes.
 
+@item @var{max_frame_size_i}
+Maximum encoded frame size for I frames in bytes. If this value is set as larger
+than zero, then for I frames the value set by max_frame_size is ignored.
+
+@item @var{max_frame_size_p}
+Maximum encoded frame size for P frames in bytes. If this value is set as larger
+than zero, then for P frames the value set by max_frame_size is ignored.
+
 @item @var{max_slice_size}
 Maximum encoded slice size in bytes.
 
@@ -3282,6 +3290,11 @@ Setting this flag enables macroblock level bitrate control that generally
 improves subjective visual quality. Enabling this flag may have negative impact
 on performance and objective visual quality metric.
 
+@item @var{low_delay_brc}
+Setting this flag turns on or off LowDelayBRC feautre in qsv plugin, which provides
+more accurate bitrate control to minimize the variance of bitstream size frame
+by frame. Value: -1-default 0-off 1-on
+
 @item @var{adaptive_i}
 This flag controls insertion of I frames by the QSV encoder. Turn ON this flag
 to allow changing of frame type from P and B to I.
@@ -3394,6 +3407,14 @@ Enable rate distortion optimization.
 @item @var{max_frame_size}
 Maximum encoded frame size in bytes.
 
+@item @var{max_frame_size_i}
+Maximum encoded frame size for I frames in bytes. If this value is set as larger
+than zero, then for I frames the value set by max_frame_size is ignored.
+
+@item @var{max_frame_size_p}
+Maximum encoded frame size for P frames in bytes. If this value is set as larger
+than zero, then for P frames the value set by max_frame_size is ignored.
+
 @item @var{max_slice_size}
 Maximum encoded slice size in bytes.
 
@@ -3402,6 +3423,11 @@ Setting this flag enables macroblock level bitrate control that generally
 improves subjective visual quality. Enabling this flag may have negative impact
 on performance and objective visual quality metric.
 
+@item @var{low_delay_brc}
+Setting this flag turns on or off LowDelayBRC feautre in qsv plugin, which provides
+more accurate bitrate control to minimize the variance of bitstream size frame
+by frame. Value: -1-default 0-off 1-on
+
 @item @var{p_strategy}
 Enable P-pyramid: 0-default 1-simple 2-pyramid(bf need to be set to 0).