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gnu: FFmpeg: Prefer dav1d over libaom.

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* gnu/packages/patches/ffmpeg-prefer-dav1d.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/video.scm (ffmpeg)[source]: Use it.
This commit is contained in:
Leo Famulari 2020-02-21 11:51:56 -05:00
parent 85bad77fac
commit e401653b51
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GPG key ID: 2646FA30BACA7F08
3 changed files with 46 additions and 0 deletions
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1
gnu/local.mk
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@ -866,6 +866,7 @@ dist_patch_DATA = \
%D%/packages/patches/fasthenry-spSolve.patch \
%D%/packages/patches/fasthenry-spFactor.patch \
%D%/packages/patches/fbreader-curl-7.62.patch \
%D%/packages/patches/ffmpeg-prefer-dav1d.patch \
%D%/packages/patches/fifo-map-fix-flags-for-gcc.patch \
%D%/packages/patches/fifo-map-remove-catch.hpp.patch \
%D%/packages/patches/file-CVE-2018-10360.patch \

43
gnu/packages/patches/ffmpeg-prefer-dav1d.patch Normal file
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@ -0,0 +1,43 @@
When decoding AV1 files, prefer dav1d over libaom for performance
reasons.
Patch copied from upstream source repository:
<https://git.videolan.org/gitweb.cgi/ffmpeg.git/?p=ffmpeg.git;a=commitdiff;h=dc0806dd25882f41f6085c8356712f95fded56c7>
From dc0806dd25882f41f6085c8356712f95fded56c7 Mon Sep 17 00:00:00 2001
From: James Almer <jamrial@gmail.com>
Date: Sun, 15 Sep 2019 11:29:56 -0300
Subject: [PATCH] avcodec/allcodecs: make libdav1d the preferred AV1 decoder
It's considerably faster than libaom in most systems.
Reviewed-by: BBB
Signed-off-by: James Almer <jamrial@gmail.com>
---
libavcodec/allcodecs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 5130fca026..d5dfba1877 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -680,7 +680,6 @@ extern AVCodec ff_pcm_mulaw_at_encoder;
extern AVCodec ff_pcm_mulaw_at_decoder;
extern AVCodec ff_qdmc_at_decoder;
extern AVCodec ff_qdm2_at_decoder;
-extern AVCodec ff_libaom_av1_decoder;
extern AVCodec ff_libaom_av1_encoder;
extern AVCodec ff_libaribb24_decoder;
extern AVCodec ff_libcelt_decoder;
@@ -738,6 +737,7 @@ extern AVCodec ff_idf_decoder;
/* external libraries, that shouldn't be used by default if one of the
* above is available */
extern AVCodec ff_h263_v4l2m2m_encoder;
+extern AVCodec ff_libaom_av1_decoder;
extern AVCodec ff_libopenh264_encoder;
extern AVCodec ff_libopenh264_decoder;
extern AVCodec ff_h264_amf_encoder;
--
2.20.1

2
gnu/packages/video.scm
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@ -922,6 +922,8 @@ operate properly.")
(method url-fetch)
(uri (string-append "https://ffmpeg.org/releases/ffmpeg-"
version ".tar.xz"))
;; See <https://issues.guix.gnu.org/issue/39719>
(patches (search-patches "ffmpeg-prefer-dav1d.patch"))
(sha256
(base32
"176jn1lcdf0gk7sa5l2mv0faqp5dsqdhx1gqcrgymqhfmdal4xfb"))))