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Blue_MiSfit · 3rd November 2019, 03:27

Yikes. It's not too bad for small numbers of tiles, but it blows up really fast.

Using fixed QP 45, here's some results. Not a full BD-Rate analysis, but some food for thought. I used identical values for tile-column and tile-row for each of the below examples

Code:

row/column  | bitrate   | fps    | vmaf average
    0       | 4867      | 4.52   |   91.773
    1       | 4923      | 4.94   |   91.759
    2       | 5000      | 4.88   |   91.725
    4       | 5346      | 4.88   |   91.676
    6       | 5995      | 5.01   |   91.557

So, similar encoding quality across the board but with an enormous bitrate cost when using 6 columns + rows with 1080p, almost 23% more bits.

I imagine the impact would be less for UHD.

3rd November 2019, 03:27	#16 \| Link
Blue_MiSfit Derek Prestegard IRL Join Date: Nov 2003 Location: Los Angeles Posts: 5,989	Yikes. It's not too bad for small numbers of tiles, but it blows up really fast. Using fixed QP 45, here's some results. Not a full BD-Rate analysis, but some food for thought. I used identical values for tile-column and tile-row for each of the below examples Code: row/column \| bitrate \| fps \| vmaf average 0 \| 4867 \| 4.52 \| 91.773 1 \| 4923 \| 4.94 \| 91.759 2 \| 5000 \| 4.88 \| 91.725 4 \| 5346 \| 4.88 \| 91.676 6 \| 5995 \| 5.01 \| 91.557 So, similar encoding quality across the board but with an enormous bitrate cost when using 6 columns + rows with 1080p, almost 23% more bits. I imagine the impact would be less for UHD. Last edited by Blue_MiSfit; 3rd November 2019 at 03:41.