Aligning audio and video stream's start and end
Key | Action |
---|---|
K or space | Play / Pause |
M | Mute / Unmute |
C | Select next subtitles |
A | Select next audio track |
V | Show slide in full page or toggle automatic source change |
left arrow | Seek 5s backward |
right arrow | Seek 5s forward |
shift + left arrow or J | Seek 10s backward |
shift + right arrow or L | Seek 10s forward |
control + left arrow | Seek 60s backward |
control + right arrow | Seek 60s forward |
shift + down arrow | Decrease volume |
shift + up arrow | Increase volume |
shift + comma | Decrease playback rate |
shift + dot or shift + semicolon | Increase playback rate |
end | Seek to end |
beginning | Seek to beginning |
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198Creation date:
Oct. 21, 2017Speakers:
Vivia NikolaidouCompany:
ToolsOnAirLicense:
CC BY-SA 3.0Description
Sometimes, even though we get audio and video from sources of dubious quality, they must be configured to start and end at exactly the same time. This is extremely non-trivial in the GStreamer architecture, where they run in completely different threads (instead of, say, packaging audio together with video), and requires several tricky tweaks in several parts of the pipeline. In my talk, I'd like to illustrate how this is done in the ToolsOnAir media engine.
Paraskevi Nikolaidou (also known as Vivia) is currently working as a GStreamer developer. She has been active in the Open Source community and has participated in various Free and Open Source projects since 2004 when she joined the Agent Academy project. Vivia has obtained her PhD in Electrical and Computer Engineering from the Aristotle University of Thessaloniki in 2011, where she worked on multi-agent systems as well as data mining methods in supply chain management. Her open source contributions range from SCCORI Agent which was part of her PhD studies, to her contributions to the GStreamer multimedia framework, passing by her involvement with the aMSN project during her spare time. She lives in Thessaloniki, Greece, where she is currently working remotely for ToolsOnAir, a company based in Austria that works with broadcast production software, working on their GStreamer-based platform. She likes ducks, green tea, learning foreign languages and playing the flute.
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