# getting the following error when producing webrtc transport: UnsupportedError: unsupported codec \[mimeType:video/VP8, payloadType:101\]

**URL:** <https://mediasoup.discourse.group/t/getting-the-following-error-when-producing-webrtc-transport-unsupportederror-unsupported-codec-mimetype-video-vp8-payloadtype-101/2147>\
**Category:** mediasoup libraries\
**Created:** [December 17, 2020, 7:03am UTC](https://mediasoup.discourse.group/t/getting-the-following-error-when-producing-webrtc-transport-unsupportederror-unsupported-codec-mimetype-video-vp8-payloadtype-101/2147 "2020-12-17T07:03:28Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![pawan](https://avatars.discourse-cdn.com/v4/letter/p/e0b2c6/32.png) [@pawan](https://mediasoup.discourse.group/u/pawan)\
**Post date:** [December 17, 2020, 7:03am UTC](https://mediasoup.discourse.group/t/getting-the-following-error-when-producing-webrtc-transport-unsupportederror-unsupported-codec-mimetype-video-vp8-payloadtype-101/2147/1 "2020-12-17T07:03:29Z")

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![image](https://global.discourse-cdn.com/free1/uploads/mediasoup/original/1X/53f587cb21a65c7e83b47d6020dfd233342632ff.png)

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**Author:** ![hdoru](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/hdoru/32/696_2.png) [@hdoru](https://mediasoup.discourse.group/u/hdoru)\
**Post date:** [December 17, 2020, 8:43am UTC](https://mediasoup.discourse.group/t/getting-the-following-error-when-producing-webrtc-transport-unsupportederror-unsupported-codec-mimetype-video-vp8-payloadtype-101/2147/2 "2020-12-17T08:43:27Z")

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What is a router defined codecs?

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**Author:** ![pawan](https://avatars.discourse-cdn.com/v4/letter/p/e0b2c6/32.png) [@pawan](https://mediasoup.discourse.group/u/pawan)\
**Post date:** [December 17, 2020, 10:57am UTC](https://mediasoup.discourse.group/t/getting-the-following-error-when-producing-webrtc-transport-unsupportederror-unsupported-codec-mimetype-video-vp8-payloadtype-101/2147/3 "2020-12-17T10:57:02Z")

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Here are the router codecs. I have even change the producer mimeType to “video/H264”. still getting that error.  
 ![image](https://global.discourse-cdn.com/free1/uploads/mediasoup/original/1X/48217c408ffe83cd363c7867d42a12346f94ed43.png)

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<div class="post-metadata">

**Author:** ![hdoru](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/hdoru/32/696_2.png) [@hdoru](https://mediasoup.discourse.group/u/hdoru)\
**Post date:** [December 17, 2020, 1:04pm UTC](https://mediasoup.discourse.group/t/getting-the-following-error-when-producing-webrtc-transport-unsupportederror-unsupported-codec-mimetype-video-vp8-payloadtype-101/2147/4 "2020-12-17T13:04:33Z")

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```auto
"mediaCodecs": [
            {
                "kind": "audio",
                "mimeType": "audio/opus",
                "clockRate": 48000,
                "channels": 2
            },
            {
                "kind": "video",
                "mimeType": "video/VP8",
                "clockRate": 90000,
                "parameters": {

                }
            },
            {
                "kind": "video",
                "mimeType": "video/H264",
                "clockRate": 90000,
                "parameters": {
                    "packetization-mode": 1,
                    "profile-level-id": "4d0032",
                    "level-asymmetry-allowed": 1
                }
            },
	    {
                "kind": "video",
                "mimeType": "video/H264",
                "clockRate": 90000,
                "parameters": {
                    "packetization-mode": 1,
                    "profile-level-id": "42e01f",
                    "level-asymmetry-allowed": 1
                }
            }
        ]

```

mediacodecs add vp8 codec

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<div class="post-metadata">

**Author:** ![pawan](https://avatars.discourse-cdn.com/v4/letter/p/e0b2c6/32.png) [@pawan](https://mediasoup.discourse.group/u/pawan)\
**Post date:** [December 18, 2020, 3:41am UTC](https://mediasoup.discourse.group/t/getting-the-following-error-when-producing-webrtc-transport-unsupportederror-unsupported-codec-mimetype-video-vp8-payloadtype-101/2147/5 "2020-12-18T03:41:49Z")

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> [@hdoru](#):
>
> `VP8",`

It worked… Thanks.