[DCP-o-matic] Encode errors

Hello all. While encoding a DCP from a Prores422HQ file last night, I noticed the following error output: [swscaler @ 0x103830800] Warning: data is not aligned! This can lead to a speedloss ...lots of progress... [prores @ 0x103811e00] invalid plane data size [prores @ 0x103811e00] invalid plane data size [prores @ 0x103811e00] ac tex damaged 3371, 1024 ...progress until end NB I was using dcpomatic_cli, rather than the GUI. The DCP-o-matic project was created using the GUI, but then I use a script to call dcpomatic_cli, in order to batch process multiple DCPs. DCP-o-matic 1.79.0, Mac OS X 10.9.5. A few questions: 1. These errors/warnings are not included in the log file - they were just output to the terminal, presumably from FFMPEG. Shouldn't they also go to the log file? If I'd run the encode from the GUI, the errors would be silently ignored and there'd be no record of them. 2. Should I be worried about the "invalid plane data size" and "ac tex damaged" lines? Presumably this indicates corruption in the source file, but has FFMPEG quietly fixed that, or may the DCP be corrupt too? 3. Does "3371" indicate the frame number which is possibly corrupt? 4. I've noticed the "swscaler" warning message a lot before on various files. Does this have a major impact on encode times? I hope someone can advise... Many thanks, Jim