Resize videos with different widths to a fixed height preserving aspect ratio with ffmpeg

Posted by Axarydax on Super User See other posts from Super User or by Axarydax
Published on 2010-10-19T13:07:45Z Indexed on 2011/02/02 7:28 UTC
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video

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ffmpeg

I'd like to convert a lot of video files to flash video for our company's website. I have a requirement that all of the videos must be in 360p format, so their size would be Nx360.

FFMpeg uses -s argument to specify target resolution as WxH. I don't know Width, as it depends on source file aspect ratio. If source is 640x480, target will be 480x360. If source is 848x480, target will be 636x360.

Is there a way to do it with some switch of ffmpeg? That it will preserve aspect ratio and I'll only specify the height of target video?

I could easily solve it by making a program that will launch ffprobe to get source video size, calculate aspect ratio and then calculate a new width.

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