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Andreas Rheinhardt 2339f63eac avcodec/dcaenc: Create encoder-adapted tables 
Up until now, the encoder used the same tables that the decoder
uses to create its VLCs. These have the downside of requiring
the encoder to offset the tables at runtime as well as having
to read from separate tables for the length as well as the code
of the symbol to encode. The former are uint8_t, the latter uint16_t,
so using a joint table would require padding, but this doesn't
matter when these tables are generated at runtime, because they
live in the .bss segment.

Also move these init functions as well as the functions that
actually use them to dcaenc.c, because they are encoder-specific.
This also allows to remove an inclusion of PutBitContext from
dcahuff.h (and indirectly from all dca-decoder files).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-16 18:07:29 +02:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc avformat: add LAF demuxer 2022-09-16 10:02:19 +02:00
ffbuild ffbuild/common: Fix CPPFLAGS applied for compiling C++ files 2022-05-24 21:30:52 +02:00
fftools fftools/ffplay: fix rotation incorrect when frame contains the displaymatrix 2022-09-15 16:16:16 +08:00
libavcodec avcodec/dcaenc: Create encoder-adapted tables 2022-09-16 18:07:29 +02:00
libavdevice avutil/internal: Move avpriv-file API to a header of its own 2022-09-03 15:41:44 +02:00
libavfilter avfilter/vf_colorspace_cuda: mark fall-through 2022-09-15 19:35:30 +02:00
libavformat avformat/ape: fix overflow in total_blocks 2022-09-16 18:04:20 +02:00
libavutil lavu/riscv: fix off-by-one in bit-magnitude clip 2022-09-15 18:11:12 -03:00
libpostproc configure: always enable gnu_windres if available 2022-08-13 14:42:36 +02:00
libswresample swsresample/swresample: error out on invalid layouts 2022-09-14 09:52:33 -03:00
libswscale swscale/la: Add output_lasx.c file. 2022-09-10 22:56:39 +02:00
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tools tools/target_dec_fuzzer: Adjust threshold for UTVIDEO 2022-09-10 17:32:47 +02:00
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Changelog avformat: add LAF demuxer 2022-09-16 10:02:19 +02:00
configure libavfilter: add vf_colorrange_cuda, CUDA-accelerated color conversion filter 2022-09-13 22:59:30 +02:00
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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.