ffmpeg -y -i /home/tdn/tmp/prepvid/foo.avi -f matroska -threads 0 -acodec flac -ac 2 -vcodec libx264 -vpre lossless_medium -crf 16 -metadata 'File name'='/home/tdn/tmp/prepvid/foo.thm' -metadata 'File size'='8558 Bytes' -metadata 'MIME type'='image/jpeg' -metadata 'Image size'='160 x 120' -metadata 'Camera make'='Canon' -metadata 'Camera model'='Canon DIGITAL IXUS 60' -metadata 'Image timestamp'='2010:10:21 12:17:03' -metadata 'Image number'='100-7196' -metadata 'Exposure time'='1/80 s' -metadata 'Aperture'='F3.2' -metadata 'Exposure bias'='0 EV' -metadata 'Flash'='No, compulsory' -metadata 'Flash bias'='0 EV' -metadata 'Focal length'='7.1 mm' -metadata 'Subject distance'='169' -metadata 'ISO speed'='3.125' -metadata 'Exposure mode'='Program (P)' -metadata 'Metering mode'='Multi-segment' -metadata 'Macro mode'='Off' -metadata 'Image quality'='Normal Movie' -metadata 'Exif Resolution'='160 x 120' -metadata 'White balance'='Auto' -metadata 'Thumbnail'='None' -metadata 'Copyright'='' -metadata 'Exif comment'='' -metadata ''='' /home/tdn/tmp/prepvid/foo.mkv