The above answers are great, but most of them assume specific video dimensions and don't operate on a generic aspect ratio. Ffmpeg How to change aspect ratio for Every zoom in and zoom … ffmpeg cropped video changes aspect ratio - Stack Exchange Aspect ratio change of 16:9 and 1920x1080 resolution file : ffmpeg 1920x1080 aspect ratio 16:9 => 640x480 aspect 4:3: ffmpeg -y -i import.media -aspect 16:9 scale=640x360,pad=640:480:0:60:black output.media aspect ratio 16:9 , size width 640pixel => height 360pixel: With final output size 640x480, and pad 60pixel black image (top and bottom): "-vf scale=640x360,pad=640:480:0:60:black" Scaling – FFmpeg you can use ffmpeg -i to get the dimensions of the original file, and use that in your commands for the encode. What platform are you using ffmpeg on? So most generic appro... Changing the aspect ratio at constant resolution using ffmpeg So I changed mm_ffmpeg.module to match what I need. ffmpeg -i in -vf scale=ih*4/3:ih,setsar=1 -c:a copy out.mp4 I want to resize the video to a maximum height of 240px. But, later I got video which aspect is not 4:3, but 16:9 and so on. FFmpeg - Change resolution of the video with aspect ratio | 易学教程 The ffmpeg command to do this conversion will be: With a reasonably recent ffmpeg, you can resize your video with these options: ffmpeg -i in.mp4 -vf scale=720:480 out.mp4 You can set the width or height to -1 in order to let ffmpeg resize the video keeping the aspect ratio. Maintain aspect ratio in ffmpeg conversion [#383100] | Drupal.org In some cases, FFmpeg will set the Sample Aspect Ratio to compensate for the ratio change. Ich versuche, eine Video-AR mit ffmpeg wie folgt zu ändern: ffmpeg -i in.mp4 -aspect 16:9 -c copy out.mp4 ...und während dies im Grunde funk... Super User Kontakte. Maintaining aspect ratio with FFmpeg - Stack Overflow Use the command ffmpeg -i video_1920.mp4 -vf scale=640:360 video_640.mp4 -hide_banner. To install ffmpeg: 1. sudo apt install ffmpeg. This adds the overlay, but it stretches it to the same aspect ratio of the video which is what I'm trying to avoid: ffmpeg -y -i video.mov -i watermark.png -filter_complex "scale=-1:1280:flags=bicubic,overlay=(main_w-overlay_w)/2:main_h-overlay_h" -crf 0 -preset ultrafast -c:v mpeg4 -qscale:v 10 -c:a: copy out.mp4 For example, I want specify for the output video only width 100px and ffmpeg must automatically calculate height with right aspect ratio. Where … Change Resolution of Video Using Ffmpeg - Girish joshi If you have a file that should be wide-screen (16:9), but displays at. The scale argument means the output video will have a width of 720px and the height will be set based on the ratio of the original video. To maintain the height - -vf scale=hhh*a:hhh. [libx264 @ 0x2f08120] height not divisible by 2 (640x853). 3.eg .ffmpeg - i input.png -vf scale=310:240 output.png The above command simply scale image to the given size width 400 px and height 400 px but the images aspect ratio may be destroy . This may not preserve the aspect ratio. For example: and losing quality, ffmpeg won't do this. 【ffmpeg】動画の解像度を指定してリサイズ、アスペクト比を維 …
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