Recording
Rheomesh can export raw RTP packets to record audio and video using GStreamer or ffmpeg. Rheomesh provides two useful methods for recording.
generate_sdpcan generate a simple SDP to receive RTP packets.start_recordingstarts transporting RTP packets to an endpoint.
Prepare Transport
At first, please prepare RecordingTransport.
let recording_transport = router
.create_recording_transport(recording_ip, recording_port)
.await
.expect("Failed to create recording_transport");
Generate SDP
let sdp = recording_transport
.generate_sdp(publisher_id)
.await
.expect("Failed to generate SDP");
The publisher_id can be obtained from the Publisher object. See Getting Started for details.
You can use this SDP with both ffmpeg and GStreamer. For example, write SDP to stream.sdp file.
Using ffmpeg
For playback:
# -protocol_whitelist: Allow file, rtp, udp protocols
# -analyzeduration: Time to analyze input stream (10 seconds)
# -probesize: Input probing size (50MB)
$ ffplay -protocol_whitelist file,rtp,udp -analyzeduration 10000000 -probesize 50000000 -f sdp -i stream.sdp
For recording to file:
$ ffmpeg -protocol_whitelist file,rtp,udp -i stream.sdp -c copy output.mkv
Using GStreamer
For playback:
$ gst-launch-1.0 udpsrc port=30001 ! \
application/x-rtp,payload=103,encoding-name=H264 ! \
rtph264depay ! \
h264parse ! \
avdec_h264 ! \
videoconvert ! \
autovideosink
For recording to file:
$ gst-launch-1.0 udpsrc port=30001 ! \
application/x-rtp,payload=103,encoding-name=H264 ! \
rtph264depay ! \
h264parse ! \
avdec_h264 ! \
matroskamux ! \
filesink location=output.mkv
Start transporting packets
let track = recording_transport.start_recording(publisher_id).await.expect("Failed to start recording");