How can I adjust FFmpeg - RTMP streaming from NodeJS to match the real-time speed of the stream?

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One way to adjust the speed of the stream is to set the framerate and bitrate of the stream to match the requirements of the video content you're streaming. You can also adjust the buffer size and keyframe interval to reduce delays and improve the stream's quality in real time.

Another option is to use FFmpeg's -re flag which tells it to stream in real-time by adjusting the input and output rate to match the timebase of the video. This ensures that the stream is sent out at the same speed as the video input, resulting in real-time streaming with minimal delay.

You can also experiment with different encoding settings and streaming protocols to find the right balance between quality and real-time performance. Ultimately, tweaking and adjusting these settings may require some trial and error, but with some experimentation, you should be able to achieve the desired streaming performance.