Encoding with options -w 10 -l 5 and then decoding leads to corrupted file

[BramEPC]

I did a quick test to evaluate heatshrink compressing a GPX file with parameters -w 10 -l 5 but the decoded file is smaller than the original and is has several zeroed out parts.

I got this result both by compiling heatshrink under linux as by using pip install heatshrink2 under windows: ./heatshrink -e -w 10 -l 5 test.gpx test.hs ./heatshrink -d test.hs test_decoded.gpx

and

python -m heatshrink2 compress -w 10 -l 5 test.gpx test.gpx_hspython_w10_l5 python -m heatshrink2 decompress test.gpx_hspython_w10_l5 test.gpx_decompress_hspython_w10_l5

If I do not specify the -w/-l parameters under python then the result is correct. Unless I am missing something in the documentation, w 10 / l 5 should be a valid parameter combination (w between 4 and 15 and l between 3 and 10-1), so I assume I am running into a bug ?

Test files in attachment: test.zip

[BramEPC]

I realized the problem : when decoding, you ALSO have the specify the parameters used during the encoding. That was not clear to me from the documentation.

[silentbicycle]

OK. The parameters aren't saved in the output.