1dd40b8380
When a deskshare stream with combined audio + video starts up, it can
happen that the audio starts before the video - so the first video frame
will be some amount of time after the file start.
If there's a recording processing cut in this gap, the procesing can
crash because it can generate an output video with no video frames.
There are two parts to the fix:
* Trim input videos with the trim filter, configured to ensure at
least 1 output frame is generated, even if it would be after the
end timestamp.
* Use the tpad filter to pad the *start* of a video stream to make
sure there's something in the gap.
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|---|---|---|
| .github | ||
| akka-bbb-apps | ||
| akka-bbb-fsesl | ||
| bbb-common-message | ||
| bbb-common-web | ||
| bbb-export-annotations | ||
| bbb-fsesl-client | ||
| bbb-learning-dashboard | ||
| bbb-libreoffice | ||
| bbb-recording-imex | ||
| bbb-voice-conference/config/freeswitch | ||
| bigbluebutton-config | ||
| bigbluebutton-html5 | ||
| bigbluebutton-tests | ||
| bigbluebutton-web | ||
| build | ||
| docs | ||
| labs/stress-testing | ||
| record-and-playback | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .nvmrc | ||
| bbb-etherpad.placeholder.sh | ||
| bbb-lti.placeholder.sh | ||
| bbb-pads.placeholder.sh | ||
| bbb-playback.placeholder.sh | ||
| bbb-presentation-video.placeholder.sh | ||
| bbb-webhooks.placeholder.sh | ||
| bbb-webrtc-sfu.placeholder.sh | ||
| freeswitch.placeholder.sh | ||
| LICENSE | ||
| README.md | ||
| SECURITY.md | ||
| transifex.yml | ||
BigBlueButton
BigBlueButton is an open source web conferencing system.
BigBlueButton supports real-time sharing of audio, video, slides (with whiteboard controls), chat, and the screen. Instructors can engage remote students with polling, emojis, multi-user whiteboard, and breakout rooms.
Presenters can record and playback content for later sharing with others.
We designed BigBlueButton for online learning, (though it can be used for many other applications as well). The educational use cases for BigBlueButton are
- Online tutoring (one-to-one)
- Flipped classrooms (recording content ahead of your session)
- Group collaboration (many-to-many)
- Online classes (one-to-many)
You can install on a Ubuntu 20.04 64-bit server. We provide bbb-install.sh to let you have a server up and running within 30 minutes (or your money back 😉).
For full technical documentation BigBlueButton -- including architecture, features, API, and GreenLight (the default front-end) -- see https://docs.bigbluebutton.org/.
BigBlueButton and the BigBlueButton Logo are trademarks of BigBlueButton Inc .