[FFmpeg-user] Upscaling SD 4x3 to FullHD 16x9 - Aspect Ratio problem

[Gyan Doshi]

On 22-06-2018 06:13 PM, Christoph Gerstbauer wrote:

> 
> CommandLineOutput:
> 
> ffmpeg -i "F:\scaler test\_5sec.avi" -vf "crop=720:576:0:32, setfield=tff,
> yadif=1:0:0, scale=-1:1080, tinterlace=interleave_top, fieldorder=tff"
> -vcodec ffvhuff -an -s 1920x1080 -aspect 16:9 "F:\scaler

Since you're scaling proportionally ("-1:1080"), you need to pad out the 
frame to FHD.

     ffmpeg -i in -vf "crop=720:576:0:32,setfield=tff,yadif=1:0:0,
                       scale=-1:1080,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,
                       tinterlace=interleave_top, fieldorder=tff,
                       setsar=1"
            -c:v ffvhuff -an -aspect 16:9   out

Additionally, since your input isn't square-pixels, the following scale 
may be more accurate,

     scale=oh*4/3:1080

Regards,
Gyan