virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-11-26 19:01:44 +02:00
Code Issues Releases Activity
Mirror of https://git.ffmpeg.org/ffmpeg.git
95,159 Commits 37 Branches 400 Tags 460 MiB
C 90.3%
Assembly 7.8%
Makefile 1.3%
C++ 0.2%
Objective-C 0.2%
Other 0.1%
cdba00ae11
Go to file
Andreas Rheinhardt cdba00ae11 avformat/utils: Avoid copying packets unnecessarily 
Up until now, read_frame_internal in avformat/utils.c uses a spare
packet on the stack that serves no real purpose: At no point in this
function is there a need for another packet besides the packet destined
for output:
1. If the packet doesn't need a parser, but is output as is, the content
of the spare packet (that at this point contains a freshly read packet)
is simply copied into the output packet (via simple assignment, not
av_packet_move_ref, thereby confusing ownership).
2. If the packet needs parsing, the spare packet will be reset after
parsing and any packets resulting from the packet read will be put into
a packet list; the output packet is not used here at all.
3. If the stream should be discarded, the spare packet will be
unreferenced; the output packet is not used here at all either.

Therefore the spare packet and the copies can be removed in principle.
In practice, one more thing needs to be taken care of: If ff_read_packet
failed, the output packet was not affected, now it is. But given that
ff_read_packet returns a blank (as if reset via av_packet_unref) packet
on failure, there is no problem from this side either.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2019-09-28 18:32:44 -03:00
compat compat/cuda: Change inclusion guards 2019-08-05 12:07:09 +02:00
doc doc/filters: add more advanced silenceremove example 2019-09-28 23:04:07 +02:00
ffbuild build: add support for building CUDA files with clang 2019-08-04 19:08:08 +02:00
fftools ffmpeg_opt: remove errant space 2019-09-27 15:17:15 -08:00
libavcodec avcodec/motionpixels: Mark 2 functions as always_inline 2019-09-28 18:36:12 +02:00
libavdevice libavdevice: Update the class name as uniform style 2019-08-15 09:29:55 +08:00
libavfilter avfilter/fifo: use the name 's' for the pointer to the private context 2019-09-28 22:09:56 +02:00
libavformat avformat/utils: Avoid copying packets unnecessarily 2019-09-28 18:32:44 -03:00
libavresample avresample: remove deprecated attribute from the AVAudioResampleContext struct 2018-01-09 10:56:53 -03:00
libavutil lavu/qsv: remove redundant version query 2019-09-27 23:50:57 +08:00
libpostproc Bump minor versions again on master to keep 4.2 versions separate from master 2019-07-21 18:36:31 +02:00
libswresample swresample/audioconvert: fix invalid left shift for 64bit sample format 2019-09-26 16:22:47 +02:00
libswscale swscale/utils: Fix invalid left shifts of negative numbers 2019-09-28 17:24:32 +02:00
presets
tests fate: update hashes after ya16 change 2019-09-26 16:59:14 +02:00
tools tools/target_dec_fuzzer: Print samples decoded like pixels 2019-09-26 21:02:34 +02:00
.gitattributes
.gitignore tools/python: add script to convert TensorFlow model (.pb) to native model (.model) 2019-07-01 10:23:47 -03:00
.travis.yml Merge commit '899ee03088d55152a48830df0899887f055da1de' 2019-03-14 15:53:16 -03:00
Changelog avfilter: add sierpinski video source 2019-09-25 14:06:26 +02:00
configure configure: check for a sufficiently recent enough AMF version 2019-09-09 09:56:12 +02:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md INSTALL.md: Fix Markdown formatting 2019-01-31 10:29:16 -09:00
LICENSE.md LICENSE: Add missing libraries that need --enable-version3. 2019-08-12 02:25:39 +02:00
MAINTAINERS MAINTAINERS: add myself to OMX 2019-08-23 17:07:05 -07:00
Makefile tools: Add fuzzer for demuxers 2019-05-31 22:44:30 +02:00
README.md Remove the ffserver program 2018-01-06 18:31:37 +00:00
RELEASE RELEASE: Update value for post 4.2 branch 2019-07-21 18:37:32 +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 a mean to alter decoded Audio and Video through chain of 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.