[FFmpeg-devel] [PATCH] avfilter/vf_pad: add aspect option

[Paul B Mahol]

On 4/3/17, Ricardo Constantino <wiiaboo at gmail.com> wrote:
> On 3 April 2017 at 19:58, Paul B Mahol <onemda at gmail.com> wrote:
>
>>
>> Yes, but that conflict with expand behaviour.
>>
>>
> How so? Still works fine with squared pixels:
> $ ffmpeg -f lavfi -i "color=s=hd720" -vf pad=aspect=4/3 -vframes 1 -f null
> - -v verbose 2>&1 | grep Parsed_pad
> [Parsed_pad_0 @ 000001c953343940] w:1280 h:720 -> w:1280 h:960 x:0 y:0
> color:0x000000FF

I mean this:

mpv ~/Videos/derf/akiyo_cif.y4m -vf lavfi="[setsar=40/33],expand=aspect=16/9"

mpv ~/Videos/derf/akiyo_cif.y4m -vf
lavfi="[setsar=40/33,pad=x=(ow-iw)/2:y=(oh-ih)/2:aspect=16/9]"

Gives different padding when using div instead of mul.