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wm4 96b87d5cfa avformat/mp3dec: improve junk skipping heuristic 
Commit 2b3e9bbfb5 caused problems for a
certain API user:

https://code.google.com/p/chromium/issues/detail?id=537725
https://code.google.com/p/chromium/issues/detail?id=542032

The problem seems rather arbitrary, because if there's junk, anything
can happen. In this case, the imperfect junk skipping just caused it to
read different junk, from what I can see.

We can improve the accuracy of junk detection by a lot by checking if 2
consecutive frames use the same configuration. While in theory it might
be completely fine for the 1st frame to have a different format than the
2nd frame, it's exceedingly unlikely, and I can't think of a legitimate
use-case.

This is approximately the same mpg123 does for junk skipping. The
set of compared header bits is the same as the libavcodec mp3 parser
uses for similar purposes.
(cherry picked from commit de1b1a7da9)
2015-10-20 12:35:43 +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 Update for 2.8.1 2015-10-13 20:44:52 +02:00
libavcodec avcodec: loongson optimize h264dsp idct and loop filter with mmi 2015-10-16 14:47:56 +02:00
libavdevice avdevice/libdc1394: Make dc1394_frame_format and dc1394_frame_rate, static 2015-08-30 13:10:11 +02:00
libavfilter doc: fix spelling errors 2015-10-12 21:46:54 +02:00
libavformat avformat/mp3dec: improve junk skipping heuristic 2015-10-20 12:35:43 +02:00
libavresample x86inc: Drop SECTION_TEXT macro 2015-08-11 11:12:01 +02:00
libavutil avutil/log: fix zero length gnu_printf format string warning 2015-10-08 13:15:42 +02:00
libpostproc avutil/x86/asm: rename REG_SP to REG_sp 2015-08-22 02:56:53 +02:00
libswresample swresample/swresample: Fix integer overflow in seed calculation 2015-09-03 09:32:43 +02:00
libswscale swscale: fix ticket #4881 2015-10-13 20:11:42 +02:00
presets
tests fate: increase the fuzz of the AAC encoder aref test 2015-09-06 00:27:08 +02:00
tools graph2dot: use avfilter_pad_get_name accessor function 2015-08-20 22:38:01 +02:00
.gitattributes
.gitignore doc/examples: rename avio_list_dir -> avio_dir_cmd 2015-08-16 02:16:47 +02:00
arch.mak
Changelog Update for 2.8.1 2015-10-13 20:44:52 +02:00
cmdutils_common_opts.h
cmdutils_opencl.c
cmdutils.c cmdutils: Filter dst/srcw/h 2015-10-08 13:15:42 +02:00
cmdutils.h cmdutils: remove sws_opts usage, simplify code 2015-08-08 16:51:25 +02:00
common.mak Merge commit '3ae0e721c7b6e0483801b9039b3d140e3b68b7f5' 2015-07-22 16:30:37 +02:00
configure configure: Require libkvazaar < 0.7. 2015-10-14 14:15:30 +02:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
ffmpeg_dxva2.c
ffmpeg_filter.c lavfi: fix compilation with FF_API_OLD_FILTER_OPTS=0. 2015-08-18 22:22:49 -04:00
ffmpeg_opt.c ffmpeg: Improve help text for -target. 2015-09-02 14:32:06 +02:00
ffmpeg_vdpau.c ffmpeg_vdpau: Ignore decoder's max supported level 2015-08-16 15:02:33 -07:00
ffmpeg_videotoolbox.c avcodec: add new Videotoolbox hwaccel. 2015-08-03 10:12:10 +02:00
ffmpeg.c ffmpeg: Drop redundant ist check 2015-09-04 11:42:23 +02:00
ffmpeg.h ffmpeg: switch swscale option handling to AVDictionary similar to what the other subsystems use 2015-08-08 14:44:15 +02:00
ffplay.c Put remaining pieces of CODEC_FLAG_EMU_EDGE under FF_API_EMU_EDGE. 2015-08-28 14:40:59 -04:00
ffprobe.c
ffserver_config.c ffserver: use -b instead of -ab for setting audio bitrate. 2015-08-28 14:59:58 -04:00
ffserver_config.h
ffserver.c ffserver: cast PID to int64_t before printing 2015-08-21 15:47:54 +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 2.8, drop 2.2 2015-10-08 13:15:42 +02:00
Makefile avcodec: add new Videotoolbox hwaccel. 2015-08-03 10:12:10 +02:00
README.md
RELEASE Update for 2.8.1 2015-10-13 20:44:52 +02:00
RELEASE_NOTES RELEASE_NOTES based on 2.7 2015-09-08 22:33:04 +02:00
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.