Re: [Cin] HDR footage from images via ffmpeg

is HDR basically "some 8 or 10 bit tech + wide gamut light emitting"?

I am not familiar with HDR. All I know is theoretical and dated (Brinkmann's book on compositing). HDR can only be in floating point, using a normalized color range (0-1 instead of 0-255, etc.). In fact in floating point it is possible to have values above 1 while in 8, 10 -bit it is not possible to have values above the limits. Upon receiving an HDR video signal, there are algorithms to map and balance these values on SDR or HDR displays. This is called tone mapping. To summarize it is necessary: 1- An HDR video signal (usually obtained by merging multiple frames at different exposures). 2- A tone mapping tool 3- A suitable display (usually high nits, i.e., brilliance)