avconv: add support for Intel QSV-accelerated transcoding

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/doc/avconv.texi b/doc/avconv.texi
index 8e87fd671e..bee20396d6 100644
--- a/doc/avconv.texi
+++ b/doc/avconv.texi
@@ -602,6 +602,16 @@ Use VDPAU (Video Decode and Presentation API for Unix) hardware acceleration.
 
 @item dxva2
 Use DXVA2 (DirectX Video Acceleration) hardware acceleration.
+
+@item qsv
+Use the Intel QuickSync Video acceleration for video transcoding.
+
+Unlike most other values, this option does not enable accelerated decoding (that
+is used automatically whenever a qsv decoder is selected), but accelerated
+transcoding, without copying the frames into the system memory.
+
+For it to work, both the decoder and the encoder must support QSV acceleration
+and no filters must be used.
 @end table
 
 This option has no effect if the selected hwaccel is not available or not
@@ -628,6 +638,20 @@ is not specified, the value of the @var{DISPLAY} environment variable is used
 @item dxva2
 For DXVA2, this option should contain the number of the display adapter to use.
 If this option is not specified, the default adapter is used.
+
+@item qsv
+For QSV, this option corresponds to the valus of MFX_IMPL_* . Allowed values
+are:
+@table @option
+@item auto
+@item sw
+@item hw
+@item auto_any
+@item hw_any
+@item hw2
+@item hw3
+@item hw4
+@end table
 @end table
 
 @item -hwaccels