no more hslv format ?

[RS]

On 03/05/18 11:41, Ralph Corderoy wrote:
> 
> ffmpeg can produce PNGs, one per frame, and convert only a few specific
> seconds to avoid tens of thousands of them, and then adjacent frames
> could be compared in pairs to see if they are indeed identical;  compare
> `ab', `bc', `cd'...
> 
> There's a couple of variants for comparing images.
> 
>      compare foo.png bar.png x:
>      gm compare -highlight-style assign foo.png bar.png -file x:
> 
Hi Ralph

Would you first need to convert the H.264 or H.265 to raw video?  If one 
PNG is of an I-frame and the next is a P-frame or B-frame they are bound 
to be different.

Best wishes
Richard