FFmpeg: How to convert horizontal video 16:9 to vertical video 9:16, with Black background on top and bottom sides

Question

But I want video top and bottom sides black but I couldn't. How can I do this?

Thanks for your help

Remove `,boxblur=luma_radius=min(h\,w)/20:luma_power=1:chroma_radius=min(cw\,ch)/20:chroma_power=1` from my answer in that thread. — Gyan, Mar 27 '19 at 18:01
```ffmpeg -i input.mp4 -lavfi "[0:v]scale=iw:2*trunc(iw*16/18)[bg];[bg][0:v]overlay=(W-w)/2:(H-h)/2,setsar=1" output.mp4``` I used this command but top and bottom sides were not black. — ibrahimcetin, Mar 27 '19 at 18:46
`ffmpeg -i input.mp4 -vf "pad=iw:2*trunc(iw*16/18),setsar=1" -c:a copy output.mp4` — Gyan, Mar 27 '19 at 18:53
I tried the command you wrote, but this time only the bottom side was black and the top was completely absent. So the video is stuck to the top. — ibrahimcetin, Mar 27 '19 at 22:30

score 7 · Accepted Answer · answered Mar 28 '19 at 05:11

7

Here's the final command. The video is padded to 9:16 and placed in the centre.

ffmpeg -i input.mp4 -vf "pad=iw:2*trunc(iw*16/18):(ow-iw)/2:(oh-ih)/2,setsar=1" -c:a copy output.mp4

answered Mar 28 '19 at 05:11

Gyan

1 Answers1