You write that "The bottom line is that there is no setting of x264 that guarantees reducing the bitrate of ANY input video file while maintaining its visual qu

You write that "The bottom line is that there is no setting of x264 that guarantees reducing the bitrate of ANY input video file while maintaining its visual quality. And this is exactly what Beamr Video guarantees." So, turning this sentence around, Beamr Video guarantees to reduce the bitrate of any input video file while maintaining its visual quality. (I think that's what you're saying. Please explain if not.) So what happens if I take an input video file, run it through Beamr Video, and then take the output and run it through Beamr Video again? Is the output the same size or smaller? If the file is the same size, the statement that "Beamr Video guarantees to _reduce_the_bitrate_ of any input video file..." can't be true. If the file is smaller, what happens if we repeat the process again... and again... and again. We started with a file containing a finite number of bits. If each iteration reduces the number of bits, we eventually end up with an empty file. Obviously, it's not possible to maintain visual quality when there is no data, so the statement that "Beamr Video guarantees to reduce the bitrate ... _while_maintaining_its_visual_quality_" can't be true. Either way, I can't see how your statement can be true.