From e030510864c28d4b17c8d1eb09ab00f274bf5dcc Mon Sep 17 00:00:00 2001
From: Jun Zhao <jun.z...@intel.com>
Date: Tue, 2 Jan 2018 13:55:29 +0800
Subject: [PATCH] doc/codecs: Add missing documentation for hwaccel_flags.
document the hwaccel_flags option for decoding.
Signed-off-by: Jun Zhao <jun.z...@intel.com>
---
doc/codecs.texi | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/doc/codecs.texi b/doc/codecs.texi
index 7e20374334..190f03b293 100644
--- a/doc/codecs.texi
+++ b/doc/codecs.texi
@@ -1254,6 +1254,33 @@ ffprobe -dump_separator "
Maximum number of pixels per image. This value can be used to avoid out of
memory failures due to large images.
+@item hwaccel_flags @var{flags} (@emph{decoding,video})
+Set hardware accelerated decoding flags. (if active)
+
+Possible values:
+@table @samp
+@item ignore_level
+Ignore level, should be used for decoding even if the codec level used is
unknown
+or higher than the maximum supported level reported by the hardware driver.
+
+It's generally a good idea to pass this flag unless you have a specific
+reason not to, as hardware tends to under-report supported levels.
+@item allow_high_depth
+Allow to output YUV pixel formats with a different chroma sampling than 4:2:0
+and/or other than 8 bits per component
+@item allow_profile_mismatch
+Attempt to decode anyway if hardware accelerated decoder's supported profiles
do not
+exactly match the stream.
+
+For example, this can be used to try to decode baseline profile H.264
+streams in hardware - it will often succeed, because many streams marked
+as baseline profile actually conform to constrained baseline profile.
+
+Warning: If the stream is actually not supported then the behaviour is
+undefined, and may include returning entirely incorrect output
+while indicating success.
+@end table
+
@item apply_cropping @var{bool} (@emph{decoding,video})
Enable cropping if cropping parameters are multiples of the required
alignment for the left and top parameters. If the alignment is not met the
--
2.14.1
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