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Joe Schiffler 0457aaf0d3 configure: Include quotes around pkg_version 
In some MSYS environments it can happen that the 3 argument syntax
for pkg-config library specifications fails because somehow the
expansion of pkg_version ends up with a redirection we guess.

To avoid failures like in the referenced build[2], we quote it
so the whole module including operators will be expanded into
a single shell word and the single argument syntax for specifying
the library for pkg-config will be used.

The single argument syntax seems to be supported by the original
pkg-config from the beginning more than 20 years[3].

In the pkgconf implementation single argument syntax was supported
pretty much from the beginning as well. The multiple argument syntax
we used until this change, was not supported until a change[4] more
than 10 years ago.

References
----------

1. Build passing with quotes:
   https://github.com/JoeSchiff/pyav-ffmpeg/actions/runs/12358403929
2. Build failing without quotes:
   https://github.com/JoeSchiff/pyav-ffmpeg/actions/runs/12360472377
3. Earliest commit of the current pkg-config Git repo already mentions the single argument syntax:
   2ac96cbcc7 (124c0becfe68b1ef671f49ed2b9d24779ace126f_0_162)
4. pkgconf gets support for 3 argument syntax (pkgconf --exists liba = 1.2.3):
   793de6a06c

Commit-message-by: Alexander Strasser <eclipse7@gmx.net>
Signed-off-by: Joe Schiffler <joeschiffler3@gmail.com>
Signed-off-by: Alexander Strasser <eclipse7@gmx.net>
2025-01-02 09:23:00 +01:00
compat compat/w32pthreads: change pthread_t into pointer to malloced struct 2024-12-16 09:43:19 +01:00
doc doc/ffmpeg.texi: replace use of uncommon unicode characters 2024-12-26 13:41:28 -03:00
ffbuild configure: Add wasm as a fake arch 2024-12-04 16:43:06 +08:00
fftools ffmpeg_sched: return better error code 2024-12-26 15:45:00 +05:30
libavcodec avcodec/get_buffer: Use av_buffer_mallocz() for audio same as its done for video 2025-01-01 21:33:46 +01:00
libavdevice avdevice/dshow: fix unused variable warning 2024-10-17 13:04:17 +02:00
libavfilter avfilter/buffersink: don't leak the reallocated channel layouts array 2025-01-01 19:42:11 -03:00
libavformat avformat/demux: Check packet duration 2025-01-01 21:33:46 +01:00
libavutil avutil/timecode: Avoid fps overflow in av_timecode_get_smpte_from_framenum() 2024-12-24 02:45:13 +01:00
libpostproc */version.h: bump after release/7.1 branch 2024-09-24 17:10:35 +02:00
libswresample arm: Consistently use proper interworking function returns 2024-10-09 15:52:51 +03:00
libswscale swscale/utils: lazily allocate XYZ tables on CONFIG_SMALL 2024-12-26 20:31:36 +01:00
presets
tests tests/checkasm/sw_rgb: remove bogus value truncation in check_yuv2packed1() 2024-12-31 11:53:18 -03:00
tools tools/target_dec_fuzzer: Adjust threshold for EACMV 2024-12-24 02:55:51 +01:00
.gitattributes lavf/assenc: normalize line endings to \n 2024-02-11 17:01:07 -08:00
.gitignore .gitignore: add exclusions for shader .c files 2024-11-18 07:54:21 +01:00
.mailmap mailmap: add entry for myself 2024-07-15 01:59:37 +02:00
Changelog avformat: bump version for enhanced flv 2024-12-27 20:24:23 +01:00
configure configure: Include quotes around pkg_version 2025-01-02 09:23:00 +01:00
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 INSTALL: explain the circular dependency issue and solution 2024-11-03 19:35:23 +01:00
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: Lauri is still available but is really low on time nowadays 2024-11-28 23:19:00 +01:00
Makefile configure: Add wasm as a fake arch 2024-12-04 16:43:06 +08:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update release number after release/7.1 branch 2024-10-09 01:55:50 +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.