I'm working on a web app using FastAPI that uses ffmpeg to overlay audio onto video for the user. I'm running into an issue where, when I use subprocess.run(cmd), it automatically suspends the process running my FastAPI app. I can't figure out how to get the error logs to help deduce why this is, and I haven't found anything online talking about this. @app.get("/overlay-audio/") async def get_video(audio_file: str, forged_name: Annotated[str, Query()] = "default"): video_path = os.path.join(output_path, "sample.mp4") audio_path = os.path.join(output_path, audio_file) forged_path = os.path.join(output_path, forged_name + ".mp4") print("Video path: " + video_path) print("Audio path: " + audio_path) print("Output path: " + forged_path) # command to recreate # ffmpeg -i input.mp4 -i input.wav -c:v copy -map 0:v:0 -map 1:a:0 -c:a aac -b:a 192k output.mp4 cmd = ["/opt/homebrew/bin/ffmpeg", "-i", video_path, "-i", audio_path, "-c:v", "copy", "-map", "0:v:0", "-map", "1:a:0", "-c:a", "aac", "-b:a", "192k", forged_path] subprocess.run(cmd) return {"forged_vid": f"forged_{forged_name}"} if __name__ == "__main__": uvicorn.run("main:app", host="127.0.0.1", port=8000, reload=True) I've tried not writing output to the terminal, as I've read that could be a reason why it suspends using result = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE), and I've also tried running it asynchronously to avoid blocking the event loop using result = await asyncio.create_subprocess_exec( *cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE ) ```, but nothing works. Any help or possible other ways to go about this would be greatly appreciated. Terminal output about the suspension: [1] + 12526 suspended (tty output) "/Users/<user>/Tech Projects/project/tts/videnv/bin/python" Continue reading...
