c87c5bcdef
## The issue - With LL-DASH mode enabled, the gap size warning was hit and printed to the console every time a new segment was registered to the manifest. - This occurred because the first chunk's size and duration were being stored for each segment, rather than the full segment size and duration. Note, only the first chunk's metrics are known at first because in low latency mode, the segment is registered to the manifest before it is finished being processed and written. - Because of this, the gap size check was comparing the end time of the first chunk in the previous segment to the beginning time of the current segment, causing the check to fail every time. ## The Fix - Update a low latency segment's duration and size once the segment file has been fully written. - The full segment size and duration will be used to update the bandwidth estimator and the segment info list. - Updating the segment info list to hold the full duration is necessary for satisfying [the gap size check found in Represenation.cc](https://github.com/google/shaka-packager/blob/master/packager/mpd/base/representation.cc#L391). - NOTE: bandwidth estimation is currently only used in HLS |
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| gyp_packager.py | ||
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 release announcements and surveys)
- Documentation
- Tutorials
- Several open source players:
Contributing
If you have improvements or fixes, we would love to have your contributions. See https://github.com/google/shaka-packager/blob/master/CONTRIBUTING.md for details.