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Andreas Rheinhardt b2d61d0f02 avformat/matroskadec: Fix heap-buffer overflow upon gigantic timestamps 
The WebM DASH Manifest demuxer creates a comma-delimited list of
all the timestamps of index entries. It allocates 20 bytes per
timestamp; yet the largest 64bit numbers have 20 decimal digits
(for int64_t it can be '-'+ 19 digits), so that one needs 21B
per entry because of the comma (resp. the final NUL).

The code uses snprintf, but snprintf returns the strlen of the string
that would have been written had the supplied buffer been big enough.
And if this is 21, then the next entry is written at an offset of 21
from the current position. So if enough such entries exist, the buffer
won't suffice.

This commit fixes this by replacing the allocation of buffer for
the supposedly worst-case with dynamic allocations by using an AVBPrint.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-08-30 15:48:11 +02:00
compat compat/cuda: add __expf() implementation 2021-08-14 15:06:47 +02:00
doc avfilter: add grayworld video filter 2021-08-29 13:31:37 +02:00
ffbuild avfilter: compress CUDA PTX code if possible 2021-06-22 14:05:44 +02:00
fftools Revert "fftools/ffmpeg_filter: fix the flags parsing for scaler" 2021-08-30 21:27:50 +08:00
libavcodec avcodec/libx265: only call av_pix_fmt_desc_get once in init 2021-08-29 21:09:21 +03:00
libavdevice avdevice/decklink: support for more duplex mode for Decklink 8K Pro 2021-08-16 10:00:39 +08:00
libavfilter libavfilter/x86/vf_gblur: add localbuf and ff_horiz_slice_avx2/512() 2021-08-29 19:58:33 +02:00
libavformat avformat/matroskadec: Fix heap-buffer overflow upon gigantic timestamps 2021-08-30 15:48:11 +02:00
libavutil lavu/slicethread: return ENOSYS rather than EINVAL in the dummy func 2021-08-29 18:45:04 +02:00
libpostproc postproc/postprocess: Remove legacy cruft 2021-07-29 22:02:06 +02:00
libswresample (postproc|swresample)/version: Don't include libavutil/avutil.h 2021-07-29 22:02:05 +02:00
libswscale avutil/internal, swresample/audioconvert: Remove cpu.h inclusions 2021-07-22 14:33:45 +02:00
presets
tests tests/checkasm/vf_gblur.c: update check_horiz_slice for the new ff_horiz_slice_avx2/512 2021-08-29 19:58:33 +02:00
tools tools/dvd2concat: use option keyword 2021-08-22 11:44:17 +02:00
.gitattributes
.gitignore avfilter: compress CUDA PTX code if possible 2021-06-22 14:05:44 +02:00
.mailmap mailmap: add entry for myself 2021-03-09 02:09:55 +00:00
.travis.yml Merge commit '899ee03088d55152a48830df0899887f055da1de' 2019-03-14 15:53:16 -03:00
Changelog avfilter: add grayworld video filter 2021-08-29 13:31:37 +02:00
configure avfilter/vf_convolve: switch to TX FFT from avutil 2021-08-17 09:15:06 +02:00
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 avformat: add Argonaut Games CVG demuxer 2021-05-12 20:25:50 +10:00
Makefile FATE: add a test for sliced scaling 2021-08-08 19:26:05 +02:00
README.md
RELEASE Bump Versions before release/4.4 branch 2021-03-20 01:01:12 +01:00

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.