I've installed QGIS 3.6 for MAC, with GDAL 2.4, ECW GDAL Plugin for GDAL 2.4, and manually installed the libraries from ERDAS ECWJP2SDK 5.4.
This allows me to insert ECW files as raster layers in QGIS. I'd like to export them all as GeoTIF, so I was thinking of using GDAL Translate (convert format) in batch mode.
However, GDAL doesnt seem to recognize ECW: in QGIS messages panel I get "xyz.ecw not recognized as a supported file format.".
In QGIS preferences / GDAL I am seeing ECW with "rw+" flag and "ERDAS Compressed Wavelets (SDK 5.4)" so I think it was installed correctly (and ECW files do display, they just are not understood by GDAL).
All help deeply aprecciated.
Using macOS 10.14.3.