Mirror of https://git.ffmpeg.org/ffmpeg.git https://ffmpeg.org/

Go to file

Connor Worley d5aaed9d4c lavc/dxv: align to 4x4 blocks instead of 16x16 The previous assumption that DXV needs to be aligned to 16x16 was erroneous. 4x4 works just as well, and FATE decoder tests pass for all texture formats. On the encoder side, we should reject input that isn't 4x4 aligned, like the HAP encoder does, and stop aligning to 16x16. This both solves the uninitialized reads causing current FATE tests to fail and produces smaller encoded outputs. With regard to correctness, I've checked the decoding path by encoding a real-world sample with git master, and decoding it with ffmpeg -i dxt1-master.mov -c:v rawvideo -f framecrc - The results are exactly the same between master and this patch. On the encoding side, I've encoded a real-world sample with both master and this patch, and decoded both versions with ffmpeg -i dxt1-{master,patch}.mov -c:v rawvideo -f framecrc - Under this patch, results for both inputs are exactly the same. In other words, the extra padding gained by 16x16 alignment over 4x4 alignment has no impact on decoded video. Signed-off-by: Connor Worley <connorbworley@gmail.com> Signed-off-by: Martin Storsjö <martin@martin.st>		11 months ago
compat	…
doc	avfilter/fifo: Remove (a)fifo filters	11 months ago
ffbuild	…
fftools	fftools/ffplay: constrain supported YUV color spaces	11 months ago
libavcodec	lavc/dxv: align to 4x4 blocks instead of 16x16	11 months ago
libavdevice	avdevice/caca: Allow to list multiple dither option types at once	12 months ago
libavfilter	avfilter/buffersink: add color_spaces, color_ranges params	11 months ago
libavformat	lavf/demux: stop calling avcodec_close()	11 months ago
libavutil	Revert "avutil/mem: limit alignment to maximum simd align"	11 months ago
libpostproc	…
libswresample	…
libswscale	…
presets	…
tests	lavc/dxv: align to 4x4 blocks instead of 16x16	11 months ago
tools	…
.gitattributes	…
.gitignore	…
.mailmap	…
.travis.yml	…
CONTRIBUTING.md	…
COPYING.GPLv2	…
COPYING.GPLv3	…
COPYING.LGPLv2.1	…
COPYING.LGPLv3	…
CREDITS	…
Changelog	…
INSTALL.md	…
LICENSE.md	…
MAINTAINERS	…
Makefile	…
README.md	…
RELEASE	…
configure	…

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.