@ggtop
ok, now I understand. I can add a question msgbox to retry with a longer timeout.
@manolito
I agree about the doc, it is so inadeguate for all the options ffmpeg has.
As far as I have understood, 'ilme' is the real necessary flag to tell ffmpeg to encode interlaced material. 'ildct' should apply a dc transformation, but I have read users complaining of slow encoding. Probably it could be added for HQ encoding. I have found no mentions to 'alternate_scan' in the ffmpeg build I use for AVStoDVD.
Bye