Recording Video in 320x240

[ritvik....@mettl.com]

Hi!

I'm currently working with the example one2many call example and I have introduced a Recorder endpoint in between which is recording correctly. The problem is that the file is huge for even small time durations. I'm trying to scale down the video resolution but nothing seems to work. My media constraints are as follow:

var options = {
                                onicecandidate : onIceCandidate,
                                mediaConstraints : {
                                    audio: true,
                                    video: {
                                        maxWidth: 320,
                                        minWidth: 320,
                                        maxHeight: 240,
                                        minHeight: 240,
                                        maxFrameRate: 12,
                                        minFrameRate: 12
                                    }
                                }
                            };

As well as I have limited the bitrate from the server side. I have used the following configuration but nothing seems to work.

candidateWebRtc.setMaxOuputBitrate(50);
candidateWebRtc.setMaxVideoSendBandwidth(50);
candidateWebRtc.setMaxAudioRecvBandwidth(50);
candidateWebRtc.setMaxVideoRecvBandwidth(50);

Any explanation why

1. Why is the recording still in 640x480 resolution
2. Even though the bitrate is limited, data is being transmitted at ~170KB/s

Thanks!

[Ivan Gracia]

Those constraints are not according to specs. Also, you can set the minimum video recv bw to 50.

In any case, 50KB is probably too low for audio and video, even with that quality.

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[Ritvik Sachdev]

‎Hi Ivan,

Could you tell me what constraints would be correct according to specs for 320x240 video resolution and a frame rate under 15. Also, would 50KB do if it were video alone?

Thanks!

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[Ivan Gracia]

Check this post.

Ivan Gracia

[Ritvik Sachdev]

Thanks! I'll update my constraints and get back to you. Meanwhile could you suggest me ways to keep my recorded file size to a minimum? Also, how can I save bandwidth on bandwidth since currently, a single stream uses ~170KB/s. I'd like them to consume a tenth of that because I would be hosting multiple users ~200 at a time and each feed would be ~2hrs long.

Sent from my BlackBerry 10 smartphone.

From: Ivan Gracia Sent: Thursday, 4 February 2016 20:33 To: Kurento Public

[ritvik....@mettl.com]

Thanks Ivan! That seemed to resolve the issue. Any idea when firefox would start supporting the frameRate option?

[Ivan Gracia]

I thought it was working already... Are you sure it is being ignored?

Ivan Gracia

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[ritvik....@mettl.com]

There was a casing issue, "frameRate" doesn't get detected. Rest, correct me if i'm wrong, the stream takes some time to settle and initial varies a bit. I haven't tested a longer recording. I'll let you know the results once I get around with the testing.

Ritvik Sachdev

On Thursday, February 4, 2016 at 3:11:13 PM UTC+5:30, ritvik....@mettl.com wrote:

[Ivan Gracia]

Yes, it's a slow start connection, so it has to stabilize a bit in the first seconds of connection.

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