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Andreas Rheinhardt 0fc150f048 avformat/matroskaenc: Remove unnecessary avio_tell(), avio_seek() 
avio_close_dyn_buf() has a bug: When the write pointer does not point to
the end of the written data when calling it (i.e. when one has performed
a seek back to update already written data), it would not add padding to
the end of the buffer, but to the current position, overwriting other
data; furthermore the reported size would be wrong (off by the amount of
data it has overwritten with padding).

In order not to run into this when updating already written elements or
elements for which size has only been reserved, the Matroska muxer would
first record the current position of the dynamic buffer, then seek to
the desired position, perform the update and seek back to the earlier
position.

But now that end_ebml_master_crc32() does not make use of
avio_close_dyn_buf() any more, this is no longer necessary.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2020-04-03 08:10:57 +02:00
compat avformat/udp: support w32pthreads compat 2020-03-08 19:08:04 +01:00
doc avformat/matroskaenc: Don't fail if reserved Cues space doesn't suffice 2020-04-02 19:22:51 +02:00
ffbuild common.mak: Also clean Windows debug files. 2020-03-21 18:46:00 +01:00
fftools ffmpeg: Print an error instead of a debug message on exit. 2020-03-31 00:41:13 +02:00
libavcodec avcodec/v4l2_m2m_dec: Init reserved bytes to zero before ioctl call 2020-03-31 23:41:37 -04:00
libavdevice remove CHAR_MIN/CHAR_MAX usage 2020-03-17 22:46:36 +01:00
libavfilter avfilter/x86/vf_v360_init: add missing cases 2020-04-02 12:25:37 +02:00
libavformat avformat/matroskaenc: Remove unnecessary avio_tell(), avio_seek() 2020-04-03 08:10:57 +02:00
libavresample
libavutil avutil/opt: Don't use NULL for %s string in a log message 2020-04-01 04:09:18 +02:00
libpostproc libavcodec, libpostproc: Remove outcommented START/STOP_TIMER 2020-03-14 18:24:04 +01:00
libswresample Silence "string-plus-int" warning shown by clang. 2020-01-06 22:38:56 +01:00
libswscale swscale/swscale: remove useless code 2020-04-03 00:58:07 +02:00
presets
tests fate/matroska: Add test for updating CodecPrivate from packet sidedata 2020-04-03 00:33:39 +02:00
tools tools/target_dec_fuzzer: limit per frame samples for APE 2020-01-30 19:59:10 +01:00
.gitattributes
.gitignore tools/python: add script to convert TensorFlow model (.pb) to native model (.model) 2019-07-01 10:23:47 -03:00
.mailmap mailmap: fix 3-address entries 2020-03-31 04:14:14 -05:00
.travis.yml
Changelog avfilter: add vf_overlay_cuda 2020-03-28 18:39:40 +01:00
configure configure: fix build issue of vf_dnn_processing.c when --disable-swscale 2020-04-03 10:31:23 +08:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: add my gpg fingerprint 2020-03-23 23:37:19 +01:00
Makefile Makefile: Delete more created files when running "make distclean". 2020-03-11 11:43:01 +01:00
README.md
RELEASE RELEASE: Update value for post 4.2 branch 2019-07-21 18:37:32 +02:00

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.
  • 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.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process and will be ignored.