Am 01.10.23 um 16:37 schrieb Paul B Mahol:
On 10/1/23, Ulf Zibis <[email protected]> wrote:
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 ?
Encoder was specified. Lossless encoders can still compress data.
So here it compresses with factor ~11, wow, great performance for ultrafast.
-Ulf
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