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Video Editing, Change Aspect ratio 16:9 - 4:3

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chris-red
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PostPosted: 20:04 - 07 Sep 2017    Post subject: Video Editing, Change Aspect ratio 16:9 - 4:3 Reply with quote

I have a Mp4 file that is 720p, however this has been converted from the original 576i image

I would like to get the correct aspect ratio back however I can;t seem to find any software that can do it.

To confirm no cropping just a straight transformation. from 1280x720 to something that is 4:3

Thanks
Chris
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bugeye_bob
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Joined: 05 Sep 2013
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PostPosted: 20:08 - 07 Sep 2017    Post subject: Reply with quote

VSDC will do that, I use it for editing my video footage.

https://www.videosoftdev.com/
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chris-red
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PostPosted: 21:28 - 07 Sep 2017    Post subject: Reply with quote

Any idea where I can't find it?
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Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.
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ScaredyCat
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Joined: 19 May 2012
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PostPosted: 21:33 - 07 Sep 2017    Post subject: Reply with quote

Try ffmpeg

To change the Display Aspect Ratio:

Code:
ffmpeg -i [INPUT] -aspect [b]AAA:BBB[/b] -c copy [OUPTPUT]


Or to re-encode with new aspect ratio (Sample Aspect Ratio)

Code:
ffmpeg -i <INPUT_FILE> -vf scale=[b]AAA:BBB[/b] -c:v <Video_Codec> <OUTPUT_FILE>


Both examples AAA:BBB are the scale you want. eg 720:540

DAR is quicker because you're only changing the metadata flag for the aspect ratio. With SAR you're actually re-encoding the video with the new ratio.


More examples
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chris-red
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Joined: 21 Sep 2005
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PostPosted: 22:13 - 07 Sep 2017    Post subject: Reply with quote

ScaredyCat wrote:
Try ffmpeg

To change the Display Aspect Ratio:

Code:
ffmpeg -i [INPUT] -aspect [b]AAA:BBB[/b] -c copy [OUPTPUT]


Or to re-encode with new aspect ratio (Sample Aspect Ratio)

Code:
ffmpeg -i <INPUT_FILE> -vf scale=[b]AAA:BBB[/b] -c:v <Video_Codec> <OUTPUT_FILE>


Both examples AAA:BBB are the scale you want. eg 720:540

DAR is quicker because you're only changing the metadata flag for the aspect ratio. With SAR you're actually re-encoding the video with the new ratio.


More examples




I tried ffmpeg -i c:\users\chris\videos\a.mp4 -aspect 800:600 -c copy c:\users\chris\videos\ab.mp4

That simply changed the resolution to 800X600 however the image was still the same

I didn't know what to insert for video codec,

I also tried...

ffmpeg -i c:\users\chris\videos\a.mp4 -vf scale=iw/2.4:ih/1.8 c:\users\chris\videos\ab.mp4

...from the guide but again it changed the resolution but not the image.

Any ideas?
____________________
Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.
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chris-red
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Joined: 21 Sep 2005
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PostPosted: 23:22 - 07 Sep 2017    Post subject: Reply with quote

Managed to do it with Handbrake Thumbs Up
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Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.
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View user's profile Send private message You must be logged in to rate posts
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