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Alexis Ballier 6e8d856ad6 libavcodec/mpegvideo_enc.c: Fix encoding videos with less frames than the delay of the encoder.
When the encoder is fed with less frames than its delay, the picture list looks like { NULL, NULL, ..., frame, frame, frame }. When flushing the encoder (input frame == NULL), we need to ensure the picture list is shifted enough so that we do not return an empty packet, which would mean the encoder has finished, while it has not encoded any frame.

Before the patch, the command:
'./ffmpeg_g -loglevel debug -f lavfi -i "testsrc=d=0.01" -bf 2 -vcodec mpeg2video out.mxf' prints:

Output stream #0:0 (video): 1 frames encoded; 0 packets muxed (0 bytes);

After:

Output stream #0:0 (video): 1 frames encoded; 1 packets muxed (8058 bytes);

Relates to ticket .

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2015-10-18 11:55:40 +02:00
compat w32pthreads: fix mingw build on x86 with -msse2 or higher 2015-10-16 14:54:48 +02:00
doc doc/ffmpeg: use stream_loop instead of loop 2015-10-14 21:56:31 -04:00
libavcodec libavcodec/mpegvideo_enc.c: Fix encoding videos with less frames than the delay of the encoder. 2015-10-18 11:55:40 +02:00
libavdevice avdevice/internal: add av_warn_unused_result 2015-10-16 17:28:40 -04:00
libavfilter avfilter/af_ladspa: check functions return value in query_formats 2015-10-18 02:01:44 +02:00
libavformat mpegts: Make the sdt_period a double 2015-10-17 15:02:40 -04:00
libavresample avresample: Remove an unused variable 2015-09-29 14:33:01 +02:00
libavutil opencl: Force the use of 1.2 APIs 2015-10-17 01:16:50 -07:00
libpostproc Merge commit 'e88103a7f92cf27a2868b50acc8a9912f6088249' 2015-09-05 21:35:46 +02:00
libswresample swresample/swresample_internal: add av_warn_unused_result 2015-10-15 22:27:23 -04:00
libswscale swscale/swscale: add av_warn_unused_result to sws_init_context 2015-10-16 17:18:21 -04:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests aacenc_ltp: adjust and speed up autocorrelation calculations 2015-10-17 22:53:11 +01:00
tools Merge commit '87e5d8d78cf08b54b4a9e7cbaeff89f8c1d91b78' 2015-09-07 12:27:21 +02:00
.gitattributes Treat all '*.pnm' files as non-text file 2014-11-28 17:52:43 -05:00
.gitignore gitignore: ignore object file temporaries 2015-10-10 20:30:41 +02:00
.travis.yml Merge commit '1e0b8bf0b3b3b4247fb21e9839af342ae879607c' 2015-09-12 13:31:22 +02:00
arch.mak use mmi instead of loongson3 as simd-optimization flag 2015-07-07 03:46:57 +02:00
Changelog avformat: add svag demuxer 2015-10-16 16:37:41 +02:00
cmdutils_common_opts.h opts: add list device sources/sinks options 2014-10-25 20:20:31 +02:00
cmdutils_opencl.c OpenCL: Avoid potential buffer overflow in cmdutils_opencl.c 2015-04-28 12:18:23 +02:00
cmdutils.c Merge commit '9ef748173a4e0e58d40afaf38397783cd2537eaa' 2015-10-16 22:57:21 +02:00
cmdutils.h cmdutils: remove sws_opts usage, simplify code 2015-08-08 16:51:25 +02:00
common.mak Merge commit 'c1aac39eaccd32dc3b74ccfcce701d3d888fbc6b' 2015-10-14 13:54:50 +02:00
configure mips: disable all features in configure if no cpu is matched 2015-10-15 20:19:10 +02:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1 cosmetics: Delete empty lines at end of file. 2012-02-09 12:26:45 +01:00
COPYING.LGPLv3
CREDITS CREDITS: redirect to Git log, remove current outdated content 2013-01-31 18:02:52 +01:00
ffmpeg_dxva2.c ffmpeg_dxva2: call GetDesktopWindow() in place of GetShellWindow() 2015-06-03 16:25:08 +02:00
ffmpeg_filter.c Revert "Merge commit '8b830ee9a26d47b138f12a82085cdb372f407f1e'" (avconv: Do not try to configure filter outputs without streams) 2015-10-11 12:24:43 +02:00
ffmpeg_opt.c ffmpeg_opt: rename loop option to stream_loop 2015-10-14 21:06:28 +02:00
ffmpeg_vdpau.c ffmpeg_vdpau: Ignore decoder's max supported level 2015-08-16 15:02:33 -07:00
ffmpeg_videotoolbox.c ffmpeg/videotoolbox: protect UTGetOSTypeFromString on both VDA and VT 2015-10-15 10:22:31 +02:00
ffmpeg.c ffmpeg: add deprecation guards around remaining AVFMT_RAWPICTURE usage 2015-10-14 14:52:43 +02:00
ffmpeg.h Merge commit '16b0c929621f84983b83b9735ce973acb12723bc' 2015-10-14 14:28:20 +02:00
ffplay.c ffplay: eliminate stream_component_close forward declaration 2015-10-12 00:07:38 +02:00
ffprobe.c ffprobe: use AV_OPT_TYPE_BOOL for writers options 2015-09-12 17:50:22 +02:00
ffserver_config.c ffserver_config: check for INT_MIN before doing FFABS 2015-10-13 19:40:09 -04:00
ffserver_config.h ffserver: Use singlejpeg muxer for jpeg 2015-06-08 03:36:22 +02:00
ffserver.c ffserver: avoid leaking pathname at exit 2015-10-04 22:31:22 -07:00
INSTALL.md INSTALL: add markdown syntax 2014-05-28 22:38:38 +02:00
library.mak build: add LDLIBFLAGS 2015-07-08 14:35:02 +02:00
LICENSE.md avfilter: add rubberband wrapper 2015-09-20 19:54:57 +02:00
MAINTAINERS avfilter/vf_chromakey: Add chromakey video filter 2015-09-23 18:10:14 +02:00
Makefile avcodec: add new Videotoolbox hwaccel. 2015-08-03 10:12:10 +02:00
README.md README: replace http with https 2015-10-06 13:27:29 +02:00
RELEASE RELEASE: update to 2.8.git 2015-09-09 23:53:15 -03:00
version.sh version.sh: Print versions based on the last git tag for release branches 2014-07-28 15:44:59 +02:00

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.
  • ffserver is a multimedia streaming server for live broadcasts.
  • 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. Few developers follow pull requests so they will likely be ignored.