Script output unreadable because of lots of errors

[ArmedSnail]

First of all: thanks for the awesome work!

I am using the Docker Setup and the Script seems to work so far but the output is barely readable because it throws a lot of errors during the run:

`Processing /unorganized-books/0003 - Die strahlende Kuppel - K. H. Scheer.epub...
There was an error converting the ebook to txt format:
The file looks like a normal image (image/jpeg), skipping ebook-convert usage: /tmp/tmptp80oez1/Ops/images/img1 .jpg
There was an error converting the ebook to txt format:
Traceback (most recent call last):
File "/usr/bin/ebook-convert", line 20, in
sys.exit(main())
File "/usr/lib/calibre/calibre/ebooks/conversion/cli.py", line 362, in main
parser, plumber = create_option_parser(args, log)
File "/usr/lib/calibre/calibre/ebooks/conversion/cli.py", line 320, in create_option_parser
plumber = Plumber(input, output, log, reporter)
File "/usr/lib/calibre/calibre/ebooks/conversion/plumber.py", line 752, in init
raise ValueError('No plugin to handle input format: '+input_fmt)
ValueError: No plugin to handle input format: css

There was an error converting the ebook to txt format:
Traceback (most recent call last):
File "/usr/bin/ebook-convert", line 20, in
sys.exit(main())
File "/usr/lib/calibre/calibre/ebooks/conversion/cli.py", line 362, in main
parser, plumber = create_option_parser(args, log)
File "/usr/lib/calibre/calibre/ebooks/conversion/cli.py", line 320, in create_option_parser
plumber = Plumber(input, output, log, reporter)
File "/usr/lib/calibre/calibre/ebooks/conversion/plumber.py", line 752, in init
raise ValueError('No plugin to handle input format: '+input_fmt)
ValueError: No plugin to handle input format: ncx

There was an error converting the ebook to txt format:
Traceback (most recent call last):
File "/usr/bin/ebook-convert", line 20, in
sys.exit(main())
File "/usr/lib/calibre/calibre/ebooks/conversion/cli.py", line 362, in main
parser, plumber = create_option_parser(args, log)
File "/usr/lib/calibre/calibre/ebooks/conversion/cli.py", line 320, in create_option_parser
plumber = Plumber(input, output, log, reporter)
File "/usr/lib/calibre/calibre/ebooks/conversion/plumber.py", line 752, in init
raise ValueError('No plugin to handle input format: '+input_fmt)
ValueError: No plugin to handle input format: xml

There was an error converting the ebook to txt format:
Traceback (most recent call last):
File "/usr/bin/ebook-convert", line 20, in
sys.exit(main())
File "/usr/lib/calibre/calibre/ebooks/conversion/cli.py", line 362, in main
parser, plumber = create_option_parser(args, log)
File "/usr/lib/calibre/calibre/ebooks/conversion/cli.py", line 320, in create_option_parser
plumber = Plumber(input, output, log, reporter)
File "/usr/lib/calibre/calibre/ebooks/conversion/plumber.py", line 720, in init
raise ValueError('Input file must have an extension')
ValueError: Input file must have an extension

ebook-meta returns an error: libpng warning: iCCP: known incorrect sRGB profile
libpng warning: iCCP: known incorrect sRGB profile

SKIP: unorganized-books/0003 - Die strahlende Kuppel - K. H. Scheer.epub
REASON: No ISBNs found; Insufficient or wrong: 1) filename or 2) metadata
`
Since these are Errors changing the Loglevel would not help, is there any other way to hide the errors in the output?