so yeah, my camera makes broken avi videos and I had a bunch of them to repair :
for i in *.avi; do mencoder -idx $i -ovc copy -oac copy -o $i.repaired.avi; done
( that’s a command-line for those who wonder )
this only repairs the index, no re-encoding
divfixpp repairs indexes as well, but I didn’t try it
hope it helps
thanks anthony
mencoder is a great tool for video work. However, according to the mencoder man page, -idx "Rebuilds index of files if no index was found". The -forceidx option would seem be a better one to use as it will rebuild the index even if there's a pre-existing index.