76eb2c1575
adds an optional `--hls_start_time_offset` parameter, that, when used, adds `EXT-X-START` tags to the HLS media playlists. The EXT-X-START tag allows to specify the location where the player starts playing, either from start (positive value) or from end (negative value). This is especially useful in case of livestreams where this tag can be used to set the target latency of the playback. Reference: https://datatracker.ietf.org/doc/html/rfc8216#section-4.3.5.2 The RFC says, that the `EXT-X-START` tag could also be added to the master playlist, but my tests have shown that most players only respect it when it's in the media playlists. Fixes #970 --------- Co-authored-by: Joey Parrish <joeyparrish@google.com> |
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| packager | ||
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| CHANGELOG.md | ||
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| CONTRIBUTING.md | ||
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| chromium-LICENSE | ||
README.md
Shaka Packager is a tool and a media packaging SDK for DASH and HLS packaging and encryption. It can prepare and package media content for online streaming.
Shaka Packager supports:
-
Both Video-On-Demand and Live.
-
Streaming formats:
-
Key systems:
-
Encryption standards:
-
Media Containers and codecs
Codecs ISO-BMFF WebM MPEG2-TS WVM Packed Audio² H264 (AVC) I / O - I / O I - H265 (HEVC) I / O - I - - VP8 I / O I / O - - - VP9 I / O I / O - - - AV1 I / O I / O - - - AAC I / O - I / O I O MP3 O - I / O - O Dolby AC3 I / O - I / O - O Dolby EAC3 I / O - O - O MPEG-H Audio I / O - - - - Dolby AC4 I / O - - - - DTS I / O - - - - FLAC I / O - - - - Opus I / O³ I / O - - - Vorbis - I / O - - - NOTES:
- I for input and O for output.
- ²: https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-3.4
- ³: Opus support in ISO-BMFF is experimental.
-
Subtitles
Format Input Output Text WebVTT Y Y WebVTT in MP4 #405 Y Text TTML ⁴ Y TTML in MP4 - Y DVB-SUB Y - Teletext #272 - - ⁴: TTML input is only supported with TTML output (pass-through, DASH only), see also #584.
- Platforms
- Linux
- Mac
- Windows
- Cross compiling for ARM is also supported.
1: Limited support
Getting Shaka Packager
There are several ways you can get Shaka Packager.
- Using Docker. Instructions are available here.
- Get prebuilt binaries from release.
- Built from source, see Build Instructions for details.
Useful Links
- Announcement List (join for infrequent announcements and surveys)
- Subscribe to releases by following instructions from this blog- Documentation
- Tutorials
- Several open source players:
Contributing
If you have improvements or fixes, we would love to have your contributions. See https://github.com/shaka-project/shaka-packager/blob/main/CONTRIBUTING.md for details.