Predicting RS encoded bytes size about reedsolomon HOT 3 OPEN

Thank you for your feedback and your question. This is almost certainly due to the automatic chunking that is done in the RSCodec.encode() method. Although I agree it would be better if it could have a more predictable behavior, the chunking is dynamically done based on n-k (size of the input message minus the ecc bytes).

Instead of trying to predict when the chunking will happen, I would rather suggest that you forego using the RSCodec object which always was intended as an easier facade interface to use the Reed-Solomon algorithm. Instead you can use the low-level interface, so that there is no chunking, you can fully control the whole encoding process.

Anyway, if you can provide me with a self-contained minimalistic reproducible example code, then I can investigate this issue further and try to improve the reproducibility of RSCodec chunking in the future.

from reedsolomon.

I've created this plot to understand the trend of the difference between input and output size when the input grows up.

The tests confirm that the implementation has this behavior which is kinda unpredictable if you don't test before.

from reedsolomon.

Thank you for your feedback and your question. This is almost certainly due to the automatic chunking that is done in the RSCodec.encode() method. Although I agree it would be better if it could have a more predictable behavior, the chunking is dynamically done based on n-k (size of the input message minus the ecc bytes).

Instead of trying to predict when the chunking will happen, I would rather suggest that you forego using the RSCodec object which always was intended as an easier facade interface to use the Reed-Solomon algorithm. Instead you can use the low-level interface, so that there is no chunking, you can fully control the whole encoding process.

Anyway, if you can provide me with a self-contained minimalistic reproducible example code, then I can investigate this issue further and try to improve the reproducibility of RSCodec chunking in the future.

Hi! Thank you very much for your answer!
So I can't send my original code since it works with files so I've created a gist with the code used to generate the plot.

About the "low-level interface" I would like to use it but I'm not enough expert to understand how it work since I don't know how the reed-solomon error correction codes works. Can you hep me with a brief example for my case?

from reedsolomon.