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Aman Karmani 98b76bb11f avformat/rtsp: add support for satip:// 
The SAT>IP protocol[1] is similar to RTSP. However SAT>IP servers
are assumed to speak only MP2T, so DESCRIBE is not used in the same
way. When no streams are active, DESCRIBE will return 404 according
to the spec (see section 3.5.7). When streams are active, DESCRIBE
will return a list of all current streams along with information
about their signal strengths.

Previously, attemping to use ffmpeg with a rtsp:// url that points
to a SAT>IP server would work with some devices, but fail due to 404
response on others. Further, if the SAT>IP server was already
streaming, ffmpeg would incorrectly consume the DESCRIBE SDP response
and join an existing tuner instead of requesting a new session with
the URL provided by the user. These issues have been noted by many
users across the internet[2][3][4].

This commit adds proper spec-compliant support for SAT>IP, including:

- support for the satip:// psuedo-protocol[5]
- avoiding the use of DESCRIBE
- parsing and consuming the com.ses.streamID response header
- using "Transport: RTP/AVP;unicast" because the optional "/UDP"
  suffix confuses some servers

This patch has been validated against multiple SAT>IP vendor devices:

- Telestar Digibit R2
  (https://telestar.de/en/produkt/digibit-r1-2/)
- Kathrein EXIP 418
  (https://www.kathrein-ds.com/en/produkte/sat-zf-verteiltechnik/sat-ip/227/exip-418)
- Kathrein EXIP 4124
  (https://www.kathrein-ds.com/en/products/sat-if-signal-distribution/sat-ip/226/exip-4124)
- Megasat MEG-8000
  (https://www.megasat.tv/produkt/sat-ip-server-3/)
- Megasat Twin
  (https://www.megasat.tv/en/produkt/sat-ip-server-twin/)
- Triax TSS 400
  (https://www.conrad.com/p/triax-tss-400-mkii-sat-ip-server-595256)

[1] https://www.satip.info/sites/satip/files/resource/satip_specification_version_1_2_2.pdf
[2] https://stackoverflow.com/questions/61194344/does-ffmpeg-violate-the-satip-specification-describe-syntax
[3] https://github.com/kodi-pvr/pvr.iptvsimple/issues/196
[4] https://forum.kodi.tv/showthread.php?tid=359072&pid=2995884#pid2995884
[5] https://www.satip.info/resources/channel-lists/
2020-12-28 14:08:44 -08:00
compat avfilter/scale_cuda: add lanczos algorithm 2020-11-04 01:43:21 +01:00
doc doc/muxers: correct description of hls_enc_key and hls_enc_iv 2020-12-28 11:09:14 +08:00
ffbuild ffbuild: Refine MIPS handling 2020-07-23 16:30:02 +02:00
fftools ffmpeg: delay first stats 2020-12-24 10:04:38 +05:30
libavcodec avcodec/tiff: Disallow striped and tiled tiffs except for DNG 2020-12-28 19:36:57 +01:00
libavdevice lavd/decklink_dec: Do not set codec_tags. 2020-12-24 12:07:05 +01:00
libavfilter avfilter/vf_decimate: always properly handle EOF 2020-12-27 22:24:43 +01:00
libavformat avformat/rtsp: add support for satip:// 2020-12-28 14:08:44 -08:00
libavresample avresample: remove deprecated attribute from the AVAudioResampleContext struct 2018-01-09 10:56:53 -03:00
libavutil lavu: use address-of operator checking clock_gettime 2020-12-28 01:12:26 -03:00
libpostproc Bump minor versions after branching 4.3 2020-06-08 22:49:04 +02:00
libswresample swresample/audioconvert: Fix left shift of negative value 2020-09-30 10:50:45 +02:00
libswscale libswscale: avoid UB nullptr-with-offset. 2020-12-24 15:27:56 +01:00
presets
tests fate/image: add missing ffprobe dependency to fate-dpx-probe 2020-12-18 18:51:15 -03:00
tools tools/target_dec_fuzzer: Adjust maxpixels for G2M 2020-12-24 15:25:00 +01:00
.gitattributes
.gitignore tools/python: add script to convert TensorFlow model (.pb) to native model (.model) 2019-07-01 10:23:47 -03:00
.mailmap mailmap: add entry for myself 2020-07-13 11:24:04 +08:00
.travis.yml Merge commit '899ee03088d55152a48830df0899887f055da1de' 2019-03-14 15:53:16 -03:00
Changelog avfilter: add shufflepixels video filter 2020-12-20 21:44:13 +01:00
configure smvjpegdec: merge into mjpegdec 2020-12-10 10:07:09 +01:00
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 avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS smvjpegdec: merge into mjpegdec 2020-12-10 10:07:09 +01:00
Makefile tools/enum_options: fix build and add to Makefile 2020-11-20 15:20:24 +01:00
README.md Remove the ffserver program 2018-01-06 18:31:37 +00:00
RELEASE RELEASE: We are after the 4.3 branch point, update for that 2020-06-10 00:20:24 +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.