Supported RTP Capabilities

mediasoup libraries
1

I am trying to set up a video producer and consumer with mediasoup using the H265 codec. H265 has been included in supportedRtpCapabilities.ts as of mediasoup v3.9.3, but as I was attempting to facilitate codec matching between the producer and consumer, I noticed that the file lists level-asymmetry-allowed as a parameter setting for H265. According to RTP Payload Format for H.264 Video and RTP Payload Format for High Efficiency Video Coding (HEVC), level-asymmetry-allowed is an H264 specific RTP parameter.

As far as I understand, supportedRtpCapabilities.ts serves somewhat as a reference list for RtpCodecCapability for the mediaCodecs in RouterOptions, after which RtpCodecCapability can further specify the parameters in the codec matching. I have tried to specify a different set of parameters for H265 in mediaCodecs, but I have had no success streaming video so far. My producers are created successfully and I am able to receive a producer score but no keyframes, with an UnsupportedError: Cannot consume this Producer. My RTP parameters are specified as such:

            {
                kind: 'video',
                mimeType: 'video/h265',
                preferredPayloadType: 105,
                clockRate: 90000,
                parameters: {
                    'profile-id': 1
                },
                rtcpFeedback: [{ type: 'nack' }, { type: 'nack', parameter: 'pli' }, { type: 'ccm', parameter: 'fir' }, { type: 'goog-remb' }, { type: 'transport-cc' }]
            },

I have tried including level-asymmetry-allowed in my RTP parameters for H265, but it has no benefit. Is H265 fully supported in mediasoup and should level-asymmetry-allowed be ignored? In which case, what RTP parameters of H265 streaming are supported by mediasoup?

I have verified that my producer and consumer are otherwise functional using H264 and VP9, but I was hoping to achieve a higher video quality and improved video compression using H265.

Please let me know if you have any feedback and thank you.