Muxing on demand RTSP H265 to H264

[kalwinskidawid]

Question

Hey,
I tried to remux stream as is said in docs.
However, it doesn't work for me. I found a similar post with an example:

paths:
  cam1:
    sourceOnDemand: true
    source: rtsp://<user>:<password>@<ip-camera-address>:554/cam/realmonitor?channel=1&subtype=2
    runOnReady: >
      ffmpeg -i rtsp://localhost:$RTSP_PORT/$MTX_PATH
        -pix_fmt yuv420p -c:v libx264 -preset ultrafast -b:v 600k
        -max_muxing_queue_size 1024 -f rtsp rtsp://localhost:$RTSP_PORT/cam1_compressed

I tried to play a stream from http://localhost:8889/cam1_compressed also I tried create a cam1_compressed - without effect.

Here are logs:

2025/09/23 12:00:03 DEB [WebRTC] [conn 172.20.0.1:45390] [c->s] OPTIONS /cam1_compressed/whep HTTP/1.1
2025/09/23 12:00:03 DEB [WebRTC] [conn 172.20.0.1:45390] [s->c] HTTP/1.1 204 No Content
2025/09/23 12:00:03 DEB [WebRTC] [conn 172.20.0.1:45390] [c->s] POST /cam1_compressed/whep HTTP/1.1
2025/09/23 12:00:03 INF [WebRTC] [session 33459d0c] created by 172.20.0.1:45390
2025/09/23 12:00:03 DEB [path cam1_compressed] created
2025/09/23 12:00:03 INF [WebRTC] [session 33459d0c] closed: no stream is available on path 'cam1_compressed'
2025/09/23 12:00:03 DEB [path cam1_compressed] destroyed: not in use
2025/09/23 12:00:03 DEB [WebRTC] [conn 172.20.0.1:45390] [s->c] HTTP/1.1 404 Not Found

What could be wrong?
I have an H265 (raw) camera that I would like to convert to H264 (compressed) format because some older computer and mobile libraries do not yet support H265.
Btw. Should I also create the cam1_compressed path? I can see that it has been created in the logs, but I cannot see it in the list I receive from the API.

[kalwinskidawid]

Hey, @aler9 any suggestions? I stuck...