Generating Video Thumbnails during Migration

OK, so we want the next released version of OSVault to generate video thumbnails during migration from hard drive to optical/tape media. Here's how the prototype implementation works:
1. During migration, the file type is determined using the "file" command. This has been extended to recognize various video formats.
2. If the file being migrated is a video file that we support, then during migration (not just as a separate task), each block copied out is run thru the ffmpeg program. ffmpeg generates video thumbnails with the command
ffmpeg -y -i video.avi -f singlejpeg -ss 10 -vframes 1 -s 150×100 -an thumbnail.jpg
3. The output thumbnail is placed in /var/www/html for the file browser to find. WHen you use the file browser, the thumbnail is displayed if it exists.