[Octave-bug-tracker] [bug #58451] [octave forge] (video) Unit test VideoWriter fails on ppc64el

[Rafael Laboissière]

Follow-up Comment #2, bug #58451 (project octave):

Thanks for your feedback, Andreas.

It seems that the results effectively depend on the version of the x264
library. I just tried again the example that I include in my first message on
a ppc64el system (this time with libx264-160) and I get:


max_rel_err = 0.021516


The new resulting file is much more similar to the one obtained on an amd64
system:


2c2
< Complete name                            : rainbow-x86_64.mp4
---
> Complete name                            : rainbow-ppc64le-x264-160.mp4
6c6
< File size                                : 11.9 KiB
---
> File size                                : 11.5 KiB
8,9c8,9
< Overall bit rate                         : 24.3 kb/s
< Writing application                      : Lavf58.45.100
---
> Overall bit rate                         : 23.6 kb/s
> Writing application                      : Lavf58.76.100
22c22,23
< Bit rate                                 : 21.6 kb/s
---
> Bit rate                                 : 20.9 kb/s
> Maximum bit rate                         : 450 kb/s
32,34c33,35
< Bits/(Pixel*Frame)                       : 0.024
< Stream size                              : 10.6 KiB (89%)
< Writing library                          : x264 core 161
---
> Bits/(Pixel*Frame)                       : 0.023
> Stream size                              : 10.2 KiB (89%)
> Writing library                          : x264 core 160 r3011 cde9a93


Also, it is visually okay (I am attaching the result to this bug report).
However, there is still a much higher absolute error due to compression.

(file #52344)
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Additional Item Attachment:

File name: rainbow-ppc64le-x264-160.mp4   Size:11 KB
   
<https://file.savannah.gnu.org/file/rainbow-ppc64le-x264-160.mp4?file_id=52344>



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