changing the resolution of video frame

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nadia naji
nadia naji 2013-2-9
评论： Image Analyst 2019-9-30
i have some videos with different resolution but for some computing reason i need to change the resolution of them to same on for example 240x320. how can i do this? please help me?
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Sagar Shriram Salwe
Sagar Shriram Salwe 2019-9-27
Hello,
To modify the quality of video is done by changing the quality of the video as per that
Control size of output video file
Specify the output video quality as an integer in the range [0,100]. Increase this value for greater video quality. However, doing so increases the file size. Decrease the value to lower video quality with a smaller file size.
The Quality property only applies when you are writing MPEG4 video files (on Windows or Mac) or when you are writing MJPEG-AVI video only files on a Mac or Linux.
It is there in https://in.mathworks.com/help/releases/R2016a/vision/ref/vision.videofilewriter-class.html

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采纳的回答

Image Analyst
Image Analyst 2013-2-9
Yes, just use imresize().
  2 个评论
nadia naji
nadia naji 2013-2-9
thank you i really appreciate your help
Image Analyst
Image Analyst 2019-9-30
Attached is a demo that does it automatically for however many frames you have in your video, and builds a resized movie as it goes along.

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Sagar Shriram Salwe
编辑：Sagar Shriram Salwe 2019-9-30
The simplest method to solve this i find out:
Just go to figure created by imagesc
Open file >Export setup and change the size from auto to expected size required.
Suppost 1920x1024 points and save this configuration and again rerun the .m file without closing image.
The expected changes required for high resolution will get obtained after doing this.
Hope this will help

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