Streaming from Retroarch help needed

[RobertMCortese]

Question

Hello,

I'd like to stream from retroarch to my mediaMTX install. I can get retroarch to connect to the mediaMTX server, but I get this error.
2024/07/26 08:52:25 INF [RTMP] [conn [::1]:9182] opened
2024/07/26 08:52:27 INF [RTMP] [conn [::1]:9182] closed: invalid message type: 255

This is the config I'm using on the retroarch side.
vcodec = libx264
acodec = libmp3lame
pix_fmt = yuv420p
scale_factor = 2
threads = 3
video_crf = 25
video_preset = superfast
video_tune = animation
audio_global_quality = 75
sample_rate = 44100
format = flv

[aler9]

Hello, i tried streaming from Retroarch to the server and it worked flawlessly.
I used Ubuntu 22.04, FFmpeg 7.0.1, retroarch 1.19.1.

stream.cfg content:

vcodec = libx264
acodec = libmp3lame
pix_fmt = yuv420p
scale_factor = 2
threads = 3
video_crf = 25
video_preset = superfast
video_tune = animation
audio_global_quality = 75
sample_rate = 44100
format = flv

retroarch was launched with

retroarch --record rtmp://127.0.0.1:1935/stream --recordconfig stream.cfg