Flagship VP9 Support: Notes and Discussion

Yes my config as follows,

p2p: {
        // Enables peer to peer mode. When enabled the system will try to
        // establish a direct connection when there are exactly 2 participants
        // in the room. If that succeeds the conference will stop sending data
        // through the JVB and use the peer to peer connection instead. When a
        // 3rd participant joins the conference will be moved back to the JVB
        // connection.
        enabled: true,

        // The STUN servers that will be used in the peer to peer connections
        stunServers: [

            // { urls: 'stun:jitsi-meet.example.com:3478' },
            { urls: 'stun:meet-jit-si-turnrelay.jitsi.net:443' }

        // Sets the ICE transport policy for the p2p connection. At the time
        // of this writing the list of possible values are 'all' and 'relay',
        // but that is subject to change in the future. The enum is defined in
        // the WebRTC standard:
        // https://www.w3.org/TR/webrtc/#rtcicetransportpolicy-enum.
        // If not set, the effective value is 'all'.
        // iceTransportPolicy: 'all',

        // If set to true, it will prefer to use H.264 for P2P calls (if H.264
        // is supported). This setting is deprecated, use preferredCodec instead.
        //preferH264: true

        // Provides a way to set the video codec preference on the p2p connection. Acceptable
        // codec values are 'VP8', 'VP9' and 'H264'.
         preferredCodec: 'VP9',

        // If set to true, disable H.264 video codec by stripping it out of the
        // SDP. This setting is deprecated, use disabledCodec instead.
         disableH264: true,

        // Provides a way to prevent a video codec from being negotiated on the p2p connection.
        // disabledCodec: '',

        // How long we're going to wait, before going back to P2P after the 3rd
        // participant has left the conference (to filter out page reload).
        // backToP2PDelay: 5


videoQuality: {
    //    // Provides a way to prevent a video codec from being negotiated on the JVB connection. The codec specified
    //    // here will be removed from the list of codecs present in the SDP answer generated by the client. If the
    //    // same codec is specified for both the disabled and preferred option, the disable settings will prevail.
    //    // Note that 'VP8' cannot be disabled since it's a mandatory codec, the setting will be ignored in this case.
    //    disabledCodec: 'H264',
    //    // Provides a way to set a preferred video codec for the JVB connection. If 'H264' is specified here,
    //    // simulcast will be automatically disabled since JVB doesn't support H264 simulcast yet. This will only
    //    // rearrange the the preference order of the codecs in the SDP answer generated by the browser only if the
    //    // preferred codec specified here is present. Please ensure that the JVB offers the specified codec for this
    //    // to take effect.
        preferredCodec: 'VP9'
    //    // Provides a way to configure the maximum bitrates that will be enforced on the simulcast streams for
    //    // video tracks. The keys in the object represent the type of the stream (LD, SD or HD) and the values
    //    // are the max.bitrates to be set on that particular type of stream. The actual send may vary based on
    //    // the available bandwidth calculated by the browser, but it will be capped by the values specified here.
    //    // This is currently not implemented on app based clients on mobile.
    //    maxBitratesVideo: {
    //        low: 60000,
    //        standard: 400000,
    //        high: 1000000
    //    }
    //    // The options can be used to override default thresholds of video thumbnail heights corresponding to
    //    // the video quality levels used in the application. At the time of this writing the allowed levels are:
    //    //     'low' - for the low quality level (180p at the time of this writing)
    //    //     'standard' - for the medium quality level (360p)
    //    //     'high' - for the high quality level (720p)
    //    // The keys should be positive numbers which represent the minimal thumbnail height for the quality level.
    //    //
    //    // With the default config value below the application will use 'low' quality until the thumbnails are
    //    // at least 360 pixels tall. If the thumbnail height reaches 720 pixels then the application will switch to
    //    // the high quality.
    //    minHeightForQualityLvl: {
    //        360: 'standard',
    //        720: 'high'
    //    },
    //    // Provides a way to resize the desktop track to 720p (if it is greater than 720p) before creating a canvas
    //    // for the presenter mode (camera picture-in-picture mode with screenshare).
    //    resizeDesktopForPresenter: false

With these configs, my chrome did not fallbak to vp8 if someone with safari browser joins the conference room :frowning:

Chrome can see everyone but safari can not see chrome :frowning:

Is V8 and Vp9 enabled in jicofo.conf ? → they are enabled by default

I think this version does not include the patches required for fallback to vp8

hi @plokta

you are right, it seems that this feature is added at 5765.

  • Add new codec selection mechanism. When an endpoint that doesn’t support the preferred codec (VP9) joins a conference, all the other endpoints fallback to VP8 until the endpoint leaves the call.

Anyone else has issues with desktopSharingFrameRate when VP9 is enabled?

Yeah… only thing that appears to make it work is to enable presenter mode, then the framerate responds to the set constraints.

Thanks. Good to know for once it wasn’t me messing up the config :slight_smile:

Can’t wait till this gets ironed out and I can flip the switch on VP9. It’s fricking awesome!

What kind of gains have you seen with VP9 - resolution, bandwidth or both?

It was a quick unscientific test, but resolution was significantly better and obvious to all parties. I did not go as far as to check bandwidth when it became apparent screenshare was suffering.