![]() Option 2: Scale the video, keep aspect ratio so that height is adjusted to fit ffmpeg -y -i "%%i" -vf scale=480:-2,setsar=1:1 -c:v libx264 -c:a copy "%%~ni_shrink.mp4" Option 3, I'll give a partially tested solution. To use the scale filter, use the following command ffmpeg -i input.mp4 -vf scalew:h output.mp4 where, w and h denote the required width and height of the destination video.Option 2 would be the preferred solution, otherwise you are (probably unnecessarily) increasing the output file size. Using FFmpeg to scale or change the resolution of a video is done by the scale filter in FFmpeg. Crop the input before scaling so that it "fills" the 480x320 resolution. Anyway, lets check how to use FFmpeg to resize your video in the next part. Convert h.264 to h.265 (no change in resolution) ffmpeg -i input.mp4 -c:v libx265 -vtag hvc1 -c:a copy output.mp4 Convert 4k(h.264) to 1080(h.265) Downscaling + Change in compression codec ffmpeg -i input.mp4 -c:v libx265 -vtag hvc1 -vf scale1920:1080 -crf 20 -c:a copy output.Scale the video, keep aspect ratio and pad with black bars so that the video size is exactly 480x320.Scale the video, keep aspect ratio so that the scaled height (or width) is adjusted to fit.As you have your command, the aspect ratio is potentially going to get messed up. (I'm not too sure about the output file expansion in the Linux script, worth validating that.) Determine your file format and name Before you use FFmpeg resize video tool, you need to determine the format. Download and Install FFmpeg to Your Computer First, download the latest version of FFmpeg to your computer. Using Variables There are also some useful variables which can be used instead of numbers, to specify width and height of the output image. How to Use FFmpeg to Resize Videos Step 1. I guess that really there are two questions here.įfmpeg -y -i "$i" > "$_shrink.mp4" ffmpeg -i input.jpg -vf scale320:-2 output320.png The output will now be 320Ã206 pixels.
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