[Milhouse]

For thumbnail, should i modify it to @qa.tbn.refresh ?

./texturecache.py qax tvshows @qaperiod=9999 @qa.tbn.refresh=1 ?

No, by default it will automatically refresh episodes with missing artwork once the local image is found, this behaviour requires no extra parameters.

There is an equivalent caching refresh option, @cache.refresh, which you would use with "C" if you only wanted to re-cach recently updated artwork. For instance "C tvshows @cache.refresh=0" would only re-cache tvshow artwork updated since 00:00 - handy if you have another process such as SickRage updating artwork throughout the day.

By the way, @qaperiod is also just the number of days to consider when performing the QA - the default is 30 which would only consider tvshows and episodes added within the last 30 days. Set this value to whatever period works for you, obviously shorter periods result in faster processing (less items processed). The first time you run it you might want a longer period, then use a shorter period if you start to run it regularly (though be aware that some shows/episodes with qa "issues" might eventually "fall out" of the period if the issues remain uncorrected for long enough).