Wait for datachannel #592
Wait for datachannel #592
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It encodes a single 640x480 all-zeros frame with VP8 and prints the IVF packet (a key-frame).
On a mouse click it sends the current video frame to VP8 and prints the generated IVF packets. If the frame hasn't changed much, the output is a small 200-500 bytes delta. If the new frame is very different, then the output is a 5-6 KB key-frame.
Default VPX params: ?codec=vp8 Can also use vp9. ?width=640 ?height=480 For example, to encode 720p video with VP9 use: ?libvpx=1&codec=vp9&width=1280&height=720
- Mouse click to encode the current frame. - Ctrl+Click to decode it back to YUV. YUV to RGB part isn't done yet.
Frames are either sent manually, at mouse click, or by a timer if you add ?fps=10, for example: ...?libvpx=1&fps=5&width=480&height=360 Join the same room from two clients and use a mouse click to start sending video. An attempt to start video from the other side breaks the app: currently encoder and decoder can't co-exist.
?fps=0 allows to send frames on demand.
1500 kbps is enough to send 720p video is good quality: ?width=1280&fps=30&height=720&vsbr=3000&libvpx=1 The max bitrate is limited by the max message size that can be sent over RTCDataChannel: 64 KB. The frame size will be about bitrate / fps. Changing the bitrate doesn't seem to affect encoding or decoding speed.
working capture working capture log to prove that it works convert floats to ints Experimenting Fix bugs :P Foo
…ted to transition to active
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Do you want to merge this or was this meant for the other branch you worked on? |
I removed webrtc audio/video streams and reworked the code to wait for datachannel in order to transition to active. hacky but works