FFmpeg - How should I do to convince YouTube that it is receiving "endless" video stream?

Question

I'm using FFmpeg and Youtube Live Streaming API to live-stream videos to YouTube.

I made something generates video files continuously, and I want to live-stream them to YouTube without any delay.

To feed them to YouTube's RTMPT(rtmp://a.../live2/...) server, I tried several things:

Just while:; do ./ffmpeg ... rtmp://...; done.
Piping

YouTube streamed them continuously, but not seamlessly. It showed Buffering icon for about 20 seconds (as if a new YouTube stream gets created and starts to be fed), about 5 seconds before the currently showing video ends and the next video get showed.

| ...===============(BUFFERING)===== | ...===============(BUFFERING)===== | ...

It seems that YouTube just stops the stream when it detects the end of a video. How should I do to convince YouTube that it is receiving "endless" video stream?

https://trac.ffmpeg.org/wiki/Concatenate#demuxer otherwise you're closing the connection. — aergistal, Oct 16 '17 at 14:02
@aergistal Is it possible to concatenate infinite, dynamic numbers of files? Or, do you mean [this _hack_](https://stackoverflow.com/a/29050320/4510033)? — Константин Ван, Oct 16 '17 at 14:30
For dynamic you need to modify the concat demuxer or create your own. — aergistal, Oct 17 '17 at 07:54
@aergistal That would be a last resort. May I ask the reason why [the method](https://stackoverflow.com/a/29050320/4510033) is inappropriate to achieve this? — Константин Ван, Oct 17 '17 at 08:22
Because it's not truly infinite and would require a large file. If big enough works for then you can just use a name convention and add the files in the concat list before they're created. — aergistal, Oct 17 '17 at 08:33

FFmpeg - How should I do to convince YouTube that it is receiving "endless" video stream?

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