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Ivan Uskov 947c2aa456 libavcodec/qsvenc.c delay in 1 microsecond replaced to more appropriate 500 microseconds 
This commit replaces the 1 microsecond delay by 500 microsecond for the
case when the MFX library does return MFX_WRN_DEVICE_BUSY status.
In general this warning never appears for simple encoding or
transcoding session because the GPU is so fast so it almost always is not busy and
any delay value just does not executes.
But for heavy transcoding tasks for example, when several QSV sessions
are running simultaneously then using a 1-microsecond delay may
result in 1000 iterations per each frame.
So here possible a paradoxical case when GPU loading also loads CPU by dummy tasks.
Official MFX/QSV samples by Intel are using 1 millisecond (i.e. 1000
microseconds) everywhere where MFX_WRN_DEVICE_BUSY does appear.
So 500us is a much more optimal value than 1us.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2015-07-28 20:37:38 +02:00
compat use a wrapper script to call MS link.exe to avoid mixing with /usr/bin/link.exe 2015-07-24 20:02:32 +02:00
doc Merge commit 'b94ec30428b9696f99b08055735689623fe63954' 2015-07-27 23:21:23 +02:00
libavcodec libavcodec/qsvenc.c delay in 1 microsecond replaced to more appropriate 500 microseconds 2015-07-28 20:37:38 +02:00
libavdevice avdevice/decklink: Fix build error caused by a change in the SDK. 2015-07-28 05:16:05 +02:00
libavfilter Merge commit '7c6eb0a1b7bf1aac7f033a7ec6d8cacc3b5c2615' 2015-07-27 22:10:35 +02:00
libavformat Merge commit 'b5c1c16247ab7d166c84eaf4564e49a1535fdaaf' 2015-07-28 00:13:54 +02:00
libavresample Merge commit 'd68c05380cebf563915412182643a8be04ef890b' 2015-06-01 00:22:47 +02:00
libavutil x86/float_dsp: add missing colon to labels 2015-07-26 02:51:08 -03:00
libpostproc postproc: fix unaligned access 2015-06-19 01:47:59 +02:00
libswresample swresample/x86: add missing colon to labels 2015-07-26 02:51:13 -03:00
libswscale swscale/output: Fix "warning: assignment from incompatible pointer type" 2015-07-25 03:15:56 +02:00
presets
tests AAC Encoder: clipping avoidance 2015-07-27 19:13:48 +02:00
tools Merge commit '30dfc1dad4285e7362ce3f596d7c5d5d9b7fb33d' 2015-06-12 22:46:10 +02:00
.gitattributes
.gitignore Merge commit '8bc67ec2c0d2b5444d51a1bed1d50f0e10d92717' 2015-07-12 21:03:06 +02:00
arch.mak use mmi instead of loongson3 as simd-optimization flag 2015-07-07 03:46:57 +02:00
Changelog avfilter: add acrossfade filter 2015-07-26 21:54:13 +00:00
cmdutils_common_opts.h
cmdutils_opencl.c
cmdutils.c Merge commit 'def97856de6021965db86c25a732d78689bd6bb0' 2015-07-27 22:50:18 +02:00
cmdutils.h Merge commit 'bd2ab27c488ae92c7820efe11d4f53d84e94d58e' 2015-07-19 13:33:44 +02:00
common.mak Merge commit '3ae0e721c7b6e0483801b9039b3d140e3b68b7f5' 2015-07-22 16:30:37 +02:00
configure Merge commit '60a21b3d81c1a11cf5a08950eadd4e84ca2e597c' 2015-07-27 13:20:12 +02:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
ffmpeg_dxva2.c ffmpeg_dxva2: call GetDesktopWindow() in place of GetShellWindow() 2015-06-03 16:25:08 +02:00
ffmpeg_filter.c Merge commit 'def97856de6021965db86c25a732d78689bd6bb0' 2015-07-27 22:50:18 +02:00
ffmpeg_opt.c Merge commit '7c6eb0a1b7bf1aac7f033a7ec6d8cacc3b5c2615' 2015-07-27 22:10:35 +02:00
ffmpeg_vda.c Merge commit '40af330adf7fde8073271cf2b41ff9adc4c2bba9' 2015-07-09 12:19:34 +02:00
ffmpeg_vdpau.c
ffmpeg.c ffmpeg.c: remove all remaining coded_frame uses 2015-07-28 19:52:40 +02:00
ffmpeg.h ffmpeg.c: remove all remaining coded_frame uses 2015-07-28 19:52:40 +02:00
ffplay.c Merge commit 'def97856de6021965db86c25a732d78689bd6bb0' 2015-07-27 22:50:18 +02:00
ffprobe.c ffprobe: check av_asprintf() for failure 2015-06-13 01:45:27 +02:00
ffserver_config.c ffserver: Use singlejpeg muxer for jpeg 2015-06-08 03:36:22 +02:00
ffserver_config.h ffserver: Use singlejpeg muxer for jpeg 2015-06-08 03:36:22 +02:00
ffserver.c Merge commit '059a934806d61f7af9ab3fd9f74994b838ea5eba' 2015-07-27 23:15:19 +02:00
INSTALL.md
library.mak build: add LDLIBFLAGS 2015-07-08 14:35:02 +02:00
LICENSE.md avfilter/vf_removegrain: add x86 and x86_64 SSE2 functions 2015-07-14 23:50:50 +00:00
MAINTAINERS MAINTAINERS: add myself as a maintainer for async protocol 2015-07-21 10:40:31 +02:00
Makefile Merge commit '3ae0e721c7b6e0483801b9039b3d140e3b68b7f5' 2015-07-22 16:30:37 +02:00
README.md
RELEASE RELEASE: update to 2.7.git 2015-07-19 17:52:31 -03:00
version.sh

README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides a mean to alter decoded Audio and Video through chain of filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
  • ffplay is a minimalistic multimedia player.
  • ffprobe is a simple analysis tool to inspect multimedia content.
  • ffserver is a multimedia streaming server for live broadcasts.
  • Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.