If I will run ffmpeg with -s 100x200, then second video will have bad aspect ratio. 【ffmpeg】動画の解像度を指定してリサイズ、アスペクト比を維 … First, I cropped the video to 11/12th its original width, centering the crop rectangle horizontally. I've used this code successfully for year without any trouble (example here crops off 64px): ffmpeg -i in.avi -y -pix_fmt yuv420p -an -qscale 1 -vcodec libx264 -vf crop=in_w:in_h-64:0:64 out.mp4. In some cases, FFmpeg will set the Sample Aspect Ratio to compensate for the ratio change. If you are converting videos in portrait and landscape orientations with different aspect ratios, you can use the force_original_aspect_ratio option: You can chose to decrease or increase the video size output based on aspect ratio changing the force_original_aspect_ratio value. If we want to change the appearance of the video, knowing that the image will appear distorted, we can use an additional filter "setdar". -vf "scale=640:-1". stichworte: ffmpeg. 1. You can pad the video... DAR = SAR * stored width / height Maintaining aspect ratio with FFmpeg - Stack Overflow [Ffmpeg-user] Aspect ratio conversion 4:3 to 16:9 - narkive Aspect ratio change of 16:9 and 1920x1080 resolution file : ffmpeg Command line - scale a video using ffmpeg - InfoHeap Crop and scale image using ffmpeg - Oodlestechnologies So you demux it, changes are gone with ffmpeg, but stay with mp4box. User account menu. or if you want to changing the video aspect ratio please use setdar. 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" 1920 / 480 = 4 Your video width will therefore scale down to 1080 / 4 = 270 pixels Step 5. Use force_original_aspect_ratio, from the ffmpeg trac: ffmpeg - Convert a video to a fixed screen size by cropping and ... FFmpeg - Change resolution of the video with aspect ratio | 易学教程 $ ffmpeg -i -vf scale=: For example. Change video resolution using ffmpeg - ncona.com FFmpeg: How To Crop Videos, With Examples - Linux Uprising Blog However, this do... ffmpeg cropped video changes aspect ratio - Stack Exchange Then, we just need one command to change the resolution of a video: 1. ffmpeg -i input.mp4 -vf scale=-1 :720 output.mp4. In order to convert the 4:3 videos I tried the following: ffmpeg -i input.avi -vcodec dvvideo -croptop 88 -cropbottom 88 -s 720x576.