RTSP with Audio Stream in stuck in loop

General TouchDesigner Discussion
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1

I have an external Python script sending out a WAV file over RTSP through mediamtx. I receive the stream in TouchDesigner with an Audio Stream In CHOP. The issue, however, is that I only hear the rear-end of the WAV, and it repeats on loop while the stream has already ended. For example when I generate “1,2,3,4,5,6,7” using TTS I only hear: 4,5,6,7…,4,5,6,7… etc. While in FFMPEG the stream has already finished, and mediamtx has closed the connection.

import subprocess
import os
import threading

def stream_wav_rtsp(path):
    print(f"[FFmpeg] Streaming {path} to rtsp://localhost:8554/mystream")
    ffmpeg_cmd = [
        "ffmpeg",
        "-re",
        "-i", path,
        "-vn",
        "-c:a", "aac",
        "-f", "rtsp",
        "rtsp://localhost:8554/mystream"
    ]
    try:
        proc = subprocess.Popen(ffmpeg_cmd)

        def cleanup():
            proc.wait()
            os.remove(path)
            print("[FFmpeg] Stream finished and file removed.")

        threading.Thread(target=cleanup, daemon=True).start()

    except Exception as e:
        print(f"[FFmpeg] Error: {type(e).__name__}: {e}")
        os.remove(path)

stream_wav_rtsp("voice123.wav")

I have added the following to the mediamtx yml file:

paths:
  mystream:
    source: publisher

    record: false
    runOnDemand: ""
    fallback: ""

In TouchDesigner I simply have an Audio Stream In CHOP with the URL: rtsp://localhost:8554/mystream

Does anyone know why this happens? Or have a better/simpler way of streaming audio (from a remote server)? The machine running TouchDesigner is not the same machine as where the audio file is generated.