How do I do what aviread used to do using videoreader?

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I upgraded Matlab and things that used to be easy are now much more complicated. I could rewrite movie2avi pretty quickly, but videoreader is a worse when trying to created the functionality of aviread. I can get the frames, but colormap is missing. Why did they think we would want to replace one line with a dozen, including a for loop?
  2 个评论
Jan
Jan 2018-11-20
The forum cannot answer your question about the intention of the MathWorks staff. So do you have a question the forum can answer or is this just a statement about your level of frustration?
Which problem do you try to solve?
Chuck37
Chuck37 2018-11-20
The title of my question is the question. The venting of frustration is incidental.

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采纳的回答

Walter Roberson
Walter Roberson 2018-11-20
videoreader readframe with 'native' option returns the usual cdata and colormap information . without the native option ind2rgb equivalent is automatically done returning the rgb version of the data .
The change was for efficiency . With aviread it always scanned the full file at the time it opened it and the buffer flow was not as good so it was slower and took more memory . The newer function is better for streaming type situations especially with larger videos that might not even fit in memory .

更多回答(1 个)

Image Analyst
Image Analyst 2018-11-20
See attached video processing examples that use VideoReader().

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