[FFmpeg-user] Calculate file size for lossless encoding

[Reindl Harald]

Am 01.10.23 um 15:41 schrieb Ulf Zibis:
> Hi,
> 
> I used the following command on a 155 minute grabbing:
> 
> ffmpeg -video_size 1680x888 -framerate 25 -f x11grab -i :0.0+0,81 -c:v 
> libx264rgb -crf 0 -preset ultrafast output.mkv
> 
> Assuming, the RGB range is 8 + 8 + 8 bit or 3 byte, I calculate:
> 
> 3 x 25 x 60 x 155 x 1680 x 888 = 1040.6 GByte
> 
> But the file is only 93.7 GByte.
> 
> How can that be ?

how can it be that a zip is smaller when it still contains bit-by-bit 
all data?