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Peter Große e519dcd937 dashenc: separate segments based on current segment duration 
The current implementation creates new segments comparing

  pkt->pts - first_pts > nb_segs * min_seg_duration

This works fine, but if the keyframe interval is smaller than "min_seg_duration"
segments shorter than the minimum segment duration are created.

Example: keyint=50, min_seg_duration=3000000
 segment 1 contains keyframe 1 (duration=2s <  total_duration=3s)
                and keyframe 2 (duration=4s >= total_duration=3s)
 segment 2 contains keyframe 3 (duration=6s >= total_duration=6s)
 segment 3 contains keyframe 4 (duration=8s <  total_duration=9s)
                and keyframe 5 (duration=10s >= total_duration=9s)
 ...

Segment 2 is only 2s long, shorter than min_seg_duration = 3s.

To fix this, new segments are created based on the actual written duration.
Otherwise the option name "min_seg_duration" is misleading.

Signed-off-by: Peter Große <pegro@friiks.de>
Signed-off-by: Martin Storsjö <martin@martin.st>
2017-01-31 00:08:21 +02:00
avbuild build: Add version numbers to "Requires" entries in pkg-config files 2016-12-28 17:41:54 +01:00
compat compat/atomics: add typecasts in atomic_compare_exchange_strong() 2016-12-08 15:53:58 -05:00
doc lavc: add an option for exporting cropping information to the caller 2017-01-12 16:24:15 +01:00
libavcodec vaapi_encode: Add MPEG-2 support 2017-01-29 13:28:31 +00:00
libavdevice build: Generate pkg-config files from Make and not from configure 2016-12-22 12:30:54 +01:00
libavfilter build: Generate pkg-config files from Make and not from configure 2016-12-22 12:30:54 +01:00
libavformat dashenc: separate segments based on current segment duration 2017-01-31 00:08:21 +02:00
libavresample build: Generate pkg-config files from Make and not from configure 2016-12-22 12:30:54 +01:00
libavutil fifo: Return the correct AVERROR value 2017-01-26 10:25:20 +01:00
libswscale swscale-test: const correctness for pointer variable 2017-01-24 13:03:57 +01:00
presets presets: spelling error in libvpx 1080p50_60 2011-10-22 00:28:56 +02:00
tests fate: Skip the checkasm test if CONFIG_STATIC is disabled 2017-01-09 13:57:02 +02:00
tools build: Move entries related to building TOOLS to a subdirectory Makefile 2016-12-07 11:02:31 +01:00
.gitattributes Treat all '*.pnm' files as non-text file 2014-11-28 17:52:43 -05:00
.gitignore build: Move build-system-related helper files to a separate subdirectory 2016-12-22 11:07:50 +01:00
.travis.yml travis: Enable OSX integration 2015-11-17 16:51:00 +01:00
avconv.c avconv: Do not pass NULL to avio_tell 2017-01-13 08:42:11 +01:00
avconv.h avconv: support parsing bitstream filter options 2016-11-02 10:08:28 +01:00
avconv_dxva2.c avconv_dxva2: add a profile check for hevc 2016-07-20 16:33:09 +02:00
avconv_filter.c avconv: make sure the filtergraph is freed on init failure 2016-10-02 11:41:45 +02:00
avconv_opt.c Replace cmdutils_common_opts.h by a macro 2017-01-12 11:42:21 +01:00
avconv_qsv.c avconv_qsv: use the actual pixel format provided by lavc 2016-07-22 19:08:12 +02:00
avconv_vaapi.c avconv_vaapi: Convert to use hw_frames_ctx only 2016-08-30 22:16:01 +01:00
avconv_vda.c avconv: vda: Unlock the pixel buffer once it is accessed 2015-07-09 00:10:13 +02:00
avconv_vdpau.c avconv_vdpau: use the hwcontext device creation API 2016-05-26 15:40:34 +02:00
avplay.c Replace cmdutils_common_opts.h by a macro 2017-01-12 11:42:21 +01:00
avprobe.c Replace cmdutils_common_opts.h by a macro 2017-01-12 11:42:21 +01:00
Changelog vaapi_encode: Add MPEG-2 support 2017-01-29 13:28:31 +00:00
cmdutils.c cmdutils: update copyright year to 2017 2017-01-01 17:10:11 -05:00
cmdutils.h Replace cmdutils_common_opts.h by a macro 2017-01-12 11:42:21 +01:00
configure configure: Clean up temporary files on interrupt 2017-01-29 20:17:46 +01:00
COPYING.GPLv2 Rename COPYING.GPL --> COPYING.GPLv2 and COPYING.LGPL --> COPYING.LGPLv2.1. 2009-06-05 09:51:31 +00:00
COPYING.GPLv3 Add configure option to upgrade (L)GPL to version 3. 2009-06-05 11:04:03 +00:00
COPYING.LGPLv2.1 cosmetics: Delete empty lines at end of file. 2012-02-09 12:26:45 +01:00
COPYING.LGPLv3 Add configure option to upgrade (L)GPL to version 3. 2009-06-05 11:04:03 +00:00
CREDITS partially rename FFmpeg to Libav 2011-03-16 21:54:39 +01:00
INSTALL doc: clarify configure features 2011-04-07 02:54:12 +02:00
LICENSE Remove the legacy X11 screen grabber 2016-07-29 19:03:10 +02:00
Makefile Replace cmdutils_common_opts.h by a macro 2017-01-12 11:42:21 +01:00
README doc: Add more information in the README 2014-08-16 00:49:22 +02:00
README.md doc: Add travis badge 2015-09-14 00:19:08 +02:00
RELEASE Make the RELEASE file match with the most recent tag 2016-10-14 13:52:51 -04:00

README.md

Libav

Build Status

Libav 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.
  • libavresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • avconv is a command line toolbox to manipulate, convert and stream multimedia content.
  • avplay is a minimalistic multimedia player.
  • avprobe is a simple analisys 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

Conding examples are available in the doc/example directory.

License

Libav codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.