Feature Request: Support custom fields in RTMP onMetaData

[Jerry-Ljie]

Hi, thanks for maintaining RootEncoder.

We are using the RTMP module and noticed that the library already sends the standard @setDataFrame/onMetaData message when publishing starts.

For some RTMP ingest/analytics workflows, it would be useful to add custom fields to the onMetaData object, such as an encoder string.

Currently, RtmpClient exposes setCustomAmfObject(), but that appears to add fields to the RTMP connect command object, not to the stream-level onMetaData message.

Would it be possible to expose an API to add custom onMetaData fields, for example:

rtmpClient.setCustomMetadata(customMetadata)

or a similar method on RtmpStreamClient?

Expected behavior:

• Keep the existing standard metadata fields unchanged
• Append the custom fields to the @setDataFrame/onMetaData AMF object
• Send them whenever the library sends onMetaData, including the initial publish and full reconnects
• Logic should be consistent across both AMF0​ and AMF3

Thank you again for all the work you put into the project.

[pedroSG94]

Hello,

I did a PR for it:
#2146

Let me know if it is your expected feature and it works for you.

[Jerry-Ljie]

Hello,

I did a PR for it: #2146

Let me know if it is your expected feature and it works for you.

Thank you for implementing this. I reviewed PR #2146, and it matches the feature I expected. I’ll test it in our app and let you know if everything works correctly.

[Jerry-Ljie]

Hello,

I did a PR for it: #2146

Let me know if it is your expected feature and it works for you.

Hello ,

I tested PR #2146, and it works as expected. The streaming platform can successfully receive the custom encoder field from onMetaData.

Thank you for adding this feature!