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How to convert horizontal 1920x1080 mp4 video to vertical 1080x1920 mp4 with actual content size of 1080x608

I know ffmpeg can do it, but don't know how to do it.

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2 Answers 2

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Use the scale filter.

ffmpeg -i in -vf scale=1080:1920:force_original_aspect_ratio=decrease,pad=1080:1920:-1:-1 -c:a copy out
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FFmpeg does it through the video filter - transpose; clockwise or counter-clockwise option is available.

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