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Karl Mogensen bfeb99f5d6
avfilter/af_lv2: call lilv_instance_activate before lilv_instance_run 
Why: the change is done to comply with lilv expectations of hosts.

Added call lilv_instance_activate in the config_output function to abide by lilv documentation that states it must be called before lilv_instance_run:
"This MUST be called before calling lilv_instance_run()" - documentation source (https://github.com/lv2/lilv/blob/main/include/lilv/lilv.h)

Added call lilv_instance_deactivate in the uninit function to abide by lv2 documentation:
"If a host calls activate(), it MUST call deactivate() at some point in the future" - documentation source (https://gitlab.com/lv2/lv2/-/blob/main/include/lv2/core/lv2.h)

Added instance_activated integer to LV2Context struct to track if instance was activated and only do lilv_instance_deactivate if was activated to abide by lv2 documentation:
"Hosts MUST NOT call deactivate() unless activate() was previously called." - documentation source (https://gitlab.com/lv2/lv2/-/blob/main/include/lv2/core/lv2.h)

Regarding the patcheck warning (possibly constant :instance_activated):
This is a false positive since the struct member is zero-initialized.

Fixes: trac issue #11661 (https://trac.ffmpeg.org/ticket/11661)
Reported-by: Dave Flater
Signed-off-by: Karl Mogensen <karlmogensen0@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit fa281d1394)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2026-05-04 15:57:19 +02:00
.forgejo forgejo: backport CI job names 2026-01-02 20:02:52 +01:00
compat compat: Fix the fallback definition of stdc_trailing_zeros 2024-09-24 14:00:27 +03:00
doc doc/mailing-list-faq.texi: Fix typo in link anchor 2026-05-04 15:57:01 +02:00
ffbuild riscv: add Zvbb vector bit manipulation extension 2024-05-11 11:38:49 +03:00
fftools fftools/ffmpeg_demux: Check metadata provided filename 2026-05-04 15:57:18 +02:00
libavcodec avcodec/aom_film_grain: Remove impossible check 2026-05-04 15:57:19 +02:00
libavdevice avdevice/gdigrab: suppress int to pointer cast warning 2026-05-04 15:56:58 +02:00
libavfilter avfilter/af_lv2: call lilv_instance_activate before lilv_instance_run 2026-05-04 15:57:19 +02:00
libavformat avformat/rtmpproto: fix listen_timeout conversion for special negative values 2026-05-04 15:57:19 +02:00
libavutil avutil/eval: Check depth of AVExpr 2026-05-04 15:57:15 +02:00
libpostproc postproc/postprocess_template: fix dering with a 16x16 image 2025-06-11 17:29:46 +02:00
libswresample swresample/resample_template: add casts to avoid undefined overflows 2026-05-04 15:57:13 +02:00
libswscale swscale/output: fix integer overflows in chroma in yuv2rgba64_X_c_template() 2026-05-04 15:57:19 +02:00
presets
tests tests: Fix fate-run.sh to handle busybox-w32 absolute paths 2026-02-03 20:56:48 +00:00
tools forgejo: backport CI to release/7.1 2025-12-07 15:54:59 +00:00
.gitattributes lavf/assenc: normalize line endings to \n 2024-02-11 17:01:07 -08:00
.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
.mailmap mailmap: add entry for myself 2024-07-15 01:59:37 +02:00
Changelog Changelog: update 2025-11-21 00:07:39 +01:00
configure configure: Recognize uname "Windows_NT" as using an .exe suffix 2026-02-03 20:56:48 +00:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1 all: apply linter fixes 2025-12-07 15:54:59 +00:00
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 2025-01-03 18:28:37 +01:00
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: Add entry for samples-request 2025-06-11 17:29:48 +02:00
Makefile add tools/target_swr_fuzzer 2024-08-08 15:26:52 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE updatze for 7.1.3 2025-11-19 16:46:44 +01:00
RELEASE_NOTES RELEASE_NOTES: Based on the version from 5.1 2024-09-29 18:47:04 +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.