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c221036502
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Martin Storsjö c221036502 libavformat: Improve ff_configure_buffers_for_index for excessive deltas 
Previously, the ff_configure_buffers_for_index function had
upper sanity limits of 16 MB (1<<24) for buffer_size and
8 MB (1<<23) for short_seek_threshold.

However, if the index contained entries with a much larger
delta, setting pos_delta to a value larger than the sanity
limit, we would end up not increasing the buffer size at all.

Instead, ignore the individual deltas that are excessive, but
increase the buffer size based on the deltas that are below the
sanity limit.

Only count deltas that are below 1<<23, 8 MB; pos_delta gets doubled
before setting the buffer size - this matches the previous maximum
buffer size of 1<<24, 16 MB.

This can happen e.g. with a mov file with some tracks containing
some samples that belong in the start of the file, at the end of
the mdat, while the rest of the file is mostly reasonably interleaved;
previously those samples caused the maximum pos_delta to skyrocket,
skipping any buffer size enlargement.

Signed-off-by: Martin Storsjö <martin@martin.st>
2023-04-02 00:34:53 +03:00
compat compat: Use '-' instead of '/' for rc.exe options 2023-02-13 13:49:40 +02:00
doc doc/encoders: add an entry for the frame_length option from libfdk-aac 2023-03-31 10:17:57 -03:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools fftools/ffprobe: print crop_* frame fields 2023-03-26 16:39:59 -03:00
libavcodec get_cabac_inline_x86: Don't inline the assembly function on 32 bit 2023-04-02 00:34:10 +03:00
libavdevice lavu/frame: deprecate AVFrame.pkt_{pos,size} 2023-03-20 10:42:09 +01:00
libavfilter lavfi/vf_vpp_qsv: only add the given output sw format to output pad 2023-03-31 10:27:58 +08:00
libavformat libavformat: Improve ff_configure_buffers_for_index for excessive deltas 2023-04-02 00:34:53 +03:00
libavutil mips: fix build fail on MIPS R6 2023-03-26 01:46:39 +01:00
libpostproc version.h: Bump minor post 6.0 branch 2023-02-19 18:37:36 +01:00
libswresample swresample/swresample: add a used channel layout option using the new API 2023-02-19 18:28:45 -03:00
libswscale version.h: Bump minor post 6.0 branch 2023-02-19 18:37:36 +01:00
presets
tests fate/lavf-container: add missing swscale deps to mxf_dvcpro100 and mxf_ffv1 2023-03-28 08:54:39 -03:00
tools tools: add an AV_CODEC_CAP_ENCODER_RECON_FRAME test tool 2023-03-28 13:00:42 +02:00
.gitattributes
.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
.mailmap mailmap: stop git lying about who I commit things as 2022-11-04 19:37:46 +01:00
.travis.yml
Changelog lavc/libaribcaption.c: add ARIB caption decoder using libaribcaption 2023-03-28 12:05:19 -04:00
configure lavc/libaribcaption.c: add ARIB caption decoder using libaribcaption 2023-03-28 12:05:19 -04:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS Use https for repository links 2023-03-01 21:59:10 +01:00
INSTALL.md
LICENSE.md
MAINTAINERS MAINTAINERS: add maintainer for the imf demuxer 2023-02-13 18:41:22 +01:00
Makefile tools: add an AV_CODEC_CAP_ENCODER_RECON_FRAME test tool 2023-03-28 13:00:42 +02:00
README.md
RELEASE RELEASE: update after 5.1 branch 2022-07-13 00:31:42 +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 means to alter decoded audio and video through a directed graph of connected 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.