1. even helix engine will fail to create the thumbnail, there will be one try for it (for example *.mpg) 2. though we accept it, it's hard to fix. and it impct the user's experience just for one time(often the first time).
1. even helix engine will fail to create the thumbnail, there will be one try for it (for example *.mpg)
2. though we accept it, it's hard to fix. and it impct the user's experience just for one time(often the first time).