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Zhao Zhili 7da1adfc02 avcodec/mediacodecenc: remove the strategy to create DTS 
Use input PTS as DTS has multiple problems:
1. If there is no reordering, it's better to just use the output
PTS as DTS, since encoder may change the timestamp value (do it
on purpose or rounding error).

2. If there is reordering, input PTS should be shift a few frames
as DTS to satisfy the requirement of PTS >= DTS. I can't find a
reliable way to determine how many frames to be shift. For example,
we don't known if the encoder use hierarchical B frames. The
max_num_reorder_frames can be get from VUI, but VUI is optional.

3. Encoder dropping frames makes the case worse. Android has an
BITRATE_MODE_CBR_FD option to allow it explicitly.

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
2022-12-17 04:30:36 +08:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc doc/protocols: Remove IPFS urls to specific content in examples 2022-12-12 21:47:02 +00:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools fftools: use av_dict_get_string 2022-12-01 11:21:14 +01:00
libavcodec avcodec/mediacodecenc: remove the strategy to create DTS 2022-12-17 04:30:36 +08:00
libavdevice avdevice/avfoundation: convert to new channel layout-API 2022-11-08 14:08:05 -03:00
libavfilter avfilter/afir_template: avoid indirect accessing nb_partitions value 2022-12-12 20:29:07 +01:00
libavformat avformat/movenc: correct write_colr warning placement 2022-12-15 15:28:23 +05:30
libavutil lavu/pixdesc: handle xv30be in av_[read|write]_image_line 2022-12-08 21:15:44 -08:00
libpostproc postproc/postprocess_template: Fix alignment 2022-11-09 17:39:00 +01:00
libswresample swresample/rematrix: support mixing top front left/right channels 2022-11-03 19:39:52 -03:00
libswscale swscale/utils: Fix indentation 2022-11-24 21:02:57 +01:00
presets
tests avfilter/drawutils: rgb48/bgr48 is supported 2022-12-10 14:57:05 +01:00
tools tools/target_dec_fuzzer: Adjust threshold for RSCC 2022-12-01 21:43:57 +01:00
.gitattributes
.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
.mailmap mailmap: stop git lying about who I commit things as 2022-11-04 19:37:46 +01:00
.travis.yml
Changelog avfilter: add corr video filter 2022-12-08 13:03:42 +01:00
configure avcodec/mediacodecenc: use bsf to handle crop 2022-12-17 04:28:27 +08:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md
LICENSE.md
MAINTAINERS MAINTAINERS: add myself as amfenc* maintainer 2022-11-10 16:28:07 +01:00
Makefile configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
README.md
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.