The command:
convert.exe image.jpg pdfa:image.pdf
produce a pdfa-2b file pdf ver. 1.6 (standard iso for pdfa-2b is ver. 1.7).
The file is not valid for these problems:
Validating file "image.pdf" for conformance level pdfa-2b
The XMP property 'xap:CreateDate' is not synchronized with the document information entry 'CreationDate'.
The XMP property 'xap:ModifyDate' is not synchronized with the document information entry 'ModDate'.
A device-specific color space (DeviceRGB) without an appropriate output intent is used.
The document does not conform to the requested standard.
The document contains device-specific color spaces.
The document's meta data is either missing or inconsistent or corrupt.
Done.
The command:
convert.exe image.tif pdfa:image.pdf
produce a pdfa-1b file with these problems:
Validating file "image.pdf" for conformance level pdfa-1b
xmp:CreateDate :: Wrong value type. Expected type 'Date'.
The XMP property 'xmp:CreateDate' is not synchronized with the document information entry 'CreationDate'.
The CCITTFax stream contains an invalid 2D huffman code.
The image's sample stream's computed length 1060 is different to the actual length 40.
A device-specific color space (DeviceGray) without an appropriate output intent is used.
The document does not conform to the requested standard.
The document contains device-specific color spaces.
The document's meta data is either missing or inconsistent or corrupt.
Done.
Test executed with the online tool:
http://www.pdf-tools.com/pdf/validate-pdfa-online.aspx