Dave,
If I remember correctly we only had that flushing issue with stdin: wanted to send an infinite stream of images into ffmpeg, but ffmpeg waited until the stream was closed. Here I have reported a workaround, but I still have 1 image delay...
But now with stdout, it seems to me (with the Scheveningen Beach stream) that the output arrives without delay. But of course there is such much data involved, that I cannot analyse delays ...
In this discussion I see that (for file output) you can specify to flush, and a blocksize... Perhaps ffmpeg has similar parameters for pipes.
@wb666greene would be nice if you could add a debug node at the output, and share a screenshot of the debug panel. Another question: rtsp can transport all kind of dat formats (jpg, png...). Can you see somehow what format your camera is delivering? Because I thought I read that image2pipe doesn't like all formats, and lot of users advice to specify ecplicit which format you want on the output. When the output are files (like in your good test), then ffmpeg can determine the output format based on the file extensions.
My time is up. I'm going to count votes for the belgian elections. Manual counting in 2019, unbelievable ...
