[vlc-devel] [PATCH] core: 75° is a better field of view default

Steve Lhomme robux4 at gmail.com
Fri Nov 18 10:04:06 CET 2016


On Thu, Nov 17, 2016 at 5:48 PM, Rémi Denis-Courmont <remi at remlab.net> wrote:
> Le torstaina 17. marraskuuta 2016, 14.44.26 EET Steve Lhomme a écrit :
>> it "zooms" more on the source but has less side distortions when navigating
>> in the VR world
>
> 75 degrees FoV is rather well documented to cause motion sickness. I would
> consider much worse rather than "better".

I found countradictory articles about that. PC games seem to use 60
but to avoid motion sickness increasing the value is encouraged. VR on
the other hand is encouraged to decrease the field of view.
http://newatlas.com/columbia-university-vr-motion-sickness/43855/

The main factor is the distance to the screen, the angle should mimic
the actual angle we see on the screen. That's why consoles have a
smaller field of view, because you're further from the screen and so
have a smaller angle.

Given all that I think we should probably make this a
saved/command-line parameter, so the user can adjust it based on the
device he's using.

>> ---
>>  include/vlc_es.h | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/include/vlc_es.h b/include/vlc_es.h
>> index 46c6582..61cc968 100644
>> --- a/include/vlc_es.h
>> +++ b/include/vlc_es.h
>> @@ -282,7 +282,7 @@ typedef enum video_chroma_location_t
>>      CHROMA_LOCATION_BOTTOM_CENTER,
>>  } video_chroma_location_t;
>>
>> -#define DEFAULT_FIELD_OF_VIEW_DEGREES  80.f
>> +#define DEFAULT_FIELD_OF_VIEW_DEGREES  75.f
>>
>>  /**
>>   * video format description
>
>
> --
> Rémi Denis-Courmont
> https://www.remlab.net/
>
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