forced output ffmpeg

[lomero]

i have one video 1920x800 but put on pendrive then play on my TV 19" this video is adapted in height, so the video is distorted...
i need to convert this video from mkv to mp4 or avi with xvid codec (my TV don't have h264 codec to play original mkv video).
i have try ffmpeg with:

-aspect:v:0 2.40 -filter:v:0 "scale=1280:534" -y -tag:v xvid

but same result: when play this video on my TV video is adapted in height....
is a way to forced output video resolution without losing the original video aspect (2.40)? or add black borders on top and bottom?

[jagabo]

ffmpeg -i input.mkv -vf pad=1920:1080:0:140 -c:v mpeg4 -q 4 c:a copy output.mp4

The "140" creates equal borders at the top and bottom, 140 = (1080-800)/2

[lomero]

oh god, you are little genius!
from 2 days learning and trying to find valid string to do this but without success...
thank you very much for your support. your suggestion work fine!

[lomero]

with same principle above i have try to resize final video, with add black bars on top and bottom. try this:

ffmpeg -i input.mkv -f mp4 -ss 00:00:45.00 -to 00:40:00.00 -c:a:0 libmp3lame -q:a 2 -ar:a:0 44100 -ac:a:0 2 -c:v:0 libxvid -q:v 4 -s 1280x720 -vf pad=1280:720:0:93 -y "output.mp4"

i have problem with pad value..... why??

[poisondeathray]

the -s is set to 1280x720, not 1280x534

You can combine scale and pad into -vf

ffmpeg -i input.mkv -f mp4 -ss 00:00:45.00 -to 00:40:00.00 -c:a:0 libmp3lame -q:a 2 -ar:a:0 44100 -ac:a:0 2 -c:v:0 libxvid -q:v 4 -vf scale=1280:534,pad=1280:720:0:93 -y "output.mp4

[lomero]

ok tanxs.

i have also tried HandBrake, but how to add this feature? (resize video with balcks bands)
try to add string -vf scale=1280:534,pad=1280:720:0:93 on Advanced option on video tab but without result.... suggestion?

[jagabo]

I don't think Handbrake has any way of letting you add borders. The Extra Options field is for codec options, not filtering.

[muppler]

You can add borders with Avidemux or Staxrip, never seen this on Handbrake

[lomero]

i have try Staxrip but not easy and very big program... at this point i preferred ffmpeg! easy and fast. tanxs to jagabo string!

and tanxs to poisondeathray to your resizing string: it work very fine!

[lomero]

hi guys. new problem.
i have new video 1728x720. my TV is 1920x1080
i have calculate 1080-720=360/2=180
on this video i don't want scale video, only add blacks bands. then i've try:

ffmpeg -i input.ts -f mp4 -ss 00:00:39.00 -to 01:39:00.00 -acodec copy -c:v:0 mpeg4 -q:v 4 -vf pad=1728:720:0:180 -y output.mp4

but not work. why?

work fine with prev setting with scale:

ffmpeg -i input.ts -f mp4 -ss 00:00:39.00 -to 01:39:00.00 -acodec copy -c:v:0 mpeg4 -q:v 4 -s 1280x720 -vf scale=1280:534,pad=1280:720:0:93 -y output.mp4

[jagabo]

Since your TV stretches everything to 16:9 you want to add borders to create a 16:9 frame size. Since your video is 1728 pixels wide the 16:9 height will be 1728 * 9 / 16 = 972. So you need to add 252 lines total, 126 top and bottom.

ffmpeg -i input.ts -f mp4 -ss 00:00:39.00 -to 01:39:00.00 -acodec copy -c:v:0 mpeg4 -q:v 4 -vf pad=1728:972:0:126 -y bliss.mp4

Your TV will then stretch the resulting 16:9 video to its 16x9 screen, keeping the correct aspect ratio.

Or are you looking to pad all four edges with black bars?

[lomero]

ok. received. now i try.
and about second query, no, i want only maintain the correct ratio. no other.

edit: try now and work fine! many tanxs (again)