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Niklas Haas 4f5d91e43f avformat/http: allow limiting initial request size 
Sometimes, HTTP sources require a lot of seeking during probing / header
parsing (especially for formats like MXF). Currently, we need to completely
tear down and re-establish the connection most times this happens, which puts
a lot of stress on the network stack and also results in transmission of
possibly many unnecessary bytes.

This patch adds an option to allow FFmpeg to request partial ranges during
the initialization stage. This is done until the initial request size is fully
read, after which we fall back to the normal behavior (i.e. infinite streaming
via an unbounded request).

The usefulness of this is limited without also specifying -multiple_requests 1,
since otherwise there is little point to requesting partial ranges to begin
with. (However, it is semantically independent, so we keep it that way.)
2026-02-07 10:02:36 +00:00
.forgejo forgejo/workflows: update actions 2026-01-24 20:05:07 +00:00
compat compat: Fix .def file generation for ARM64EC builds on Windows 2025-12-19 10:01:16 +00:00
doc avformat/http: allow limiting initial request size 2026-02-07 10:02:36 +00:00
ffbuild vulkan: support shader compression 2026-01-12 17:28:41 +01:00
fftools fftools/ffprobe: add base64 data dump format 2026-02-04 21:46:30 +01:00
libavcodec Revert "avcodec/opus/parse: export the packet and extradata parsing functions" 2026-02-06 14:09:15 +01:00
libavdevice avdevice/gdigrab: suppress int to pointer cast warning 2025-12-03 23:45:44 +00:00
libavfilter avfilter/vf_find_rect: Check x/y min/max 2026-02-05 17:08:30 +01:00
libavformat avformat/http: allow limiting initial request size 2026-02-07 10:02:36 +00:00
libavutil avutil/cpu: add CPU feature detection for AArch64 CRC32 on OpenBSD 2026-02-06 14:24:01 -05:00
libswresample swresample/soxr_resample: pass initialized data to soxr_process() in flush() 2025-12-08 21:31:13 +00:00
libswscale swscale/swscale: force SwsDither and SwsAlphaBlend to 32 bits 2026-02-04 04:00:53 +00:00
presets
tests avformat/matroskaenc: parse Opus packets to write proper durations 2026-02-05 23:21:49 -03:00
tools tools/target_dec_fuzzer: adjust threshold for MAGICYUV 2026-02-05 16:50:26 +01:00
.gitattributes gitattributes: End merge conflicts in Changelog 2025-03-17 15:26:10 +01:00
.gitignore vulkan: support shader compression 2026-01-12 17:28:41 +01:00
.mailmap mailmap: add entry for myself 2025-08-08 21:51:15 +00:00
Changelog avfilter: d3d12 motion estimation filter support 2026-01-26 11:31:48 +00:00
configure Revert "avcodec/opus/parse: export the packet and extradata parsing functions" 2026-02-06 14:09:15 +01:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1 all: fix whitespace/new-line issues 2025-08-03 13:48:47 +02:00
COPYING.LGPLv3
CREDITS Use https for repository links 2023-03-01 21:59:10 +01:00
FUNDING.json Add FUNDING.json 2025-06-23 14:48:40 +02:00
INSTALL.md all: fix typos found by codespell 2025-08-03 13:48:47 +02:00
LICENSE.md Remove libpostproc 2025-05-07 15:35:47 +02:00
MAINTAINERS MAINTAINERS: add myself as whip maintainer 2026-01-11 04:24:55 +00:00
Makefile Makefile: add missing vpath for glsl/spv 2026-01-12 19:18:36 +01:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update to 8.0 2025-08-14 08:42:29 -04:00

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.