FLAC is not supported

[sorokinvj]

Dear Sam,

I thought earlier that the build of audiowaveform was successful, but now I tested it with Flac and got

File contains data in an unimplemented format.

So clearly something is wrong with the build, I log the output from yarn build, and on line 1854 (libsndfile) of the log.txt I found this:

�[91mconfigure: WARNING: *** One or more of the external libraries (ie libflac, libogg and
�[0m�[91mconfigure: WARNING: *** libvorbis) is either missing (possibly only the development
configure: WARNING: *** headers) or is of an unsupported version.
configure: WARNING: ***
�[0m�[91mconfigure: WARNING: *** Unfortunately, for ease of maintenance, the external libs
�[0m
�[91mconfigure: WARNING: *** are an all or nothing affair.

Could it be the problem? the audiowaveform build log is successful though

log.txt

[ffxsam]

I'm not really sure. It's definitely being built here: https://github.com/reelcrafter/reelcrafter-audiotool-builders/blob/master/audiowaveform/build.sh#L34-L40

But I'm not sure why it doesn't work. Unfortunately, I don't have time right now to look into it, though, but if you do get it working, a pull request would be awesome!