Docker says all is well, but every method to stream to server fails

[darkshoxx]

Question

Hi,
while my goal is to stream to and from the server using OBS, I'm trying everything in my power to stream to my server, but each method gives me an error. I have followed the instructions on docker hub and github.
I'll start with my specs, then I'll explain how each method I tried (OBS, python + OpenCV, FFMPEG, VLC, WebRTC)

Specs and Setup

I run Win 11 with a clean install of Docker Desktop (yes I have rebooted), I have WSL 2.1.5.0
I have no additional antivir to the Windows ones (
I have used strictly only
docker pull bluenviron/mediamtx
and
docker run --rm -it --network=host bluenviron/mediamtx
and I get the status

2024/08/16 18:02:20 INF MediaMTX v1.8.5
2024/08/16 18:02:20 INF configuration loaded from /mediamtx.yml
2024/08/16 18:02:20 INF [RTSP] listener opened on :8554 (TCP), :8000 (UDP/RTP), :8001 (UDP/RTCP)
2024/08/16 18:02:20 INF [RTMP] listener opened on :1935
2024/08/16 18:02:20 INF [HLS] listener opened on :8888
2024/08/16 18:02:20 INF [WebRTC] listener opened on :8889 (HTTP), :8189 (ICE/UDP)
2024/08/16 18:02:20 INF [SRT] listener opened on :8890 (UDP)

in the command line and status running in docker desktop.

Attempts

Ffmpeg

I have an mp4 file that I have converted to a .ts file with ffmpeg, called room.ts. Running
ffmpeg -re -stream_loop -1 -i room.ts -c copy -f rtsp rtsp://localhost:8554/mystream
brings up a huge status list

ffmpeg version 7.0.2-full_build-www.gyan.dev Copyright (c) 2000-2024 the FFmpeg developers
  built with gcc 13.2.0 (Rev5, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libxevd --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxeve --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-dxva2 --enable-d3d11va --enable-d3d12va --enable-ffnvcodec --enable-libvpl --enable-nvdec --enable-nvenc --enable-vaapi --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      59.  8.100 / 59.  8.100
  libavcodec     61.  3.100 / 61.  3.100
  libavformat    61.  1.100 / 61.  1.100
  libavdevice    61.  1.100 / 61.  1.100
  libavfilter    10.  1.100 / 10.  1.100
  libswscale      8.  1.100 /  8.  1.100
  libswresample   5.  1.100 /  5.  1.100
  libpostproc    58.  1.100 / 58.  1.100
Input #0, mpegts, from '.\room.ts':
  Duration: 00:13:13.99, start: 1.423000, bitrate: 848 kb/s
  Program 1
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
  Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, unknown/bt709/unknown, progressive), 1920x1080, 60 fps, 60 tbr, 90k tbn
  Stream #0:1[0x101](und): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 163 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)

however I get no changes on the server or the ffmpeg terminal. Trying to exit via Ctrl+C I get

[out#0/rtsp @ 000001919d4ddb00] Could not write header (incorrect codec parameters ?): Immediate exit requested
Exiting normally, received signal 2.

I've tried different variants using ffmpeg, including streaming the mp4 file itself, but all to no avail.

Adding in/out rules for UDP/TCP port 8554 did not change this result.

OBS Studio

Following the instructions I set Service to custom, server to rtmp://localhost and streamkey to mystream (but also tried without).
When I hit "Start Streaming" I get the error about 10 seconds later: "Failed to connect to server"
Adding in/out rules for TCP port 1935 did not change this result.

python + OpenCV

using a python 3.10 venv with opencv-python 4.10.0.84 and the exact script from the readme file, I get the error

Traceback (most recent call last):
  File "PATH REDACTED\scratch.py", line 23, in <module>
    raise Exception("can't open video writer")
Exception: can't open video writer

WebRTC

By readme I should open http://localhost:8889/mystream/publish in a browser, which gives an "Unable to connect" error, so does http://localhost:8889 itself.
Adding in/out rules for UDP port 8889 did not change this result.

VLC

Similar to ffmpeg. Ctrl+S, I choose a file to stream, add an RTSP server with port 8554. Nothing happens. I get no error but also no feedback.

Additional Comments

I'm (obviously) new to rtsp servers and the like. This docker is the third solution I've tried after FFMPEG itself and VLC itself. I've attempted multiple hours of troubleshooting on each of these attempts and it led to nowhere.
I cannot even figure out if I'm doing something wrong with the server, or something is wrong in each of my attempts to stream to it. Since I usually assume myself to be at fault, I post this as a discussion here and not as a github issue.
Any and all help is greatly appreciated.

[aler9]

This is unrelated from MediaMTX, the problem is that Docker inside WSL doesn't support the --network=host flag.

Correct issue: docker/for-win#6736

If you still want to use MediaMTX + WSL + Docker, consider exposing ports manually as mentioned in the README.

[darkshoxx]

Thanks for the help I'll give that a shot