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AVI recording


chrismyster

Question

The Backyard manual mentions that the AVI file is actually the JPEG frames are put into the container file and that the JPEGS within the AVI file are lossless compressed files.  I was wondering how compressed these files are.  I am aiming to get uncompressed RAW files that can be processed later.  Is this AVI uncompressed similar to a RAW file.

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So there is not way to take a planetary video that is composed of uncompressed frames

 

No, the fact that live view images have been stretched by the camera firmware is evidence that live frames are not raw coming out of the camera.  s3igell said it best.

 

What I can guarantee is than BYE/BYN does not compress any further live view frames, they are as-is coming out of the camera whether you use individual jpgs of the AVI.

 

Regards, 

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The jpeg added to the AVI are as-is coming out of the camera... BYE/BYN does not compress them any further than they are coming out of the camera... so stacking the individual jpgs or the AVI files will yeild the exact same result.

 

The live view jpgs are NOT raw images so they can not be compared.  Live view frames are jpgs and as a result the camera does some compression to them and only Canon can provide what they do to them... but BYE/BYN does not compress them any further than they are.  

 

Hope his makes sense.

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The concern over "Compressed" vs "Uncompressed" should be turned to:

1) "Destructive" Compression vs "Loss-less" Compression - the latter by definition does Nothing Detrimental to the actual Image

2) "JPEG" vs "RAW" Image Data Processing - the JPEG Images have been Processed (Stretched, Contrast, Saturation, Noise-Reduction) while the RAW are still "Raw".

 

It is Very Uncommon that ANY Video Output is actually RAW for any DSLR Application.

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