suddenly raise of database size

[itsme]

Hello, in my database there are about 2000 movies, each with 3 screenshots, most of them with also a poster. Filesize is appr. 500MB. This makes 0,25 MB per movie.

Now I added 100 more movies and created automatically 3 screenshots for each, no posters so far. After that the filesize of my database raised to 1GB, what makes 5 MB for each of the new movies. Is there an explanation for this behavior?

The new movies are nothing special. A database optimisation did not change anything.

[nostra]

Sounds strange indeed. What options did you select for optimization?

[itsme]

thanks for your reply. I selected only "delete invisible movies and actors orphans" and of course the last point: cleaning database.
Before adding the movies I made a copy, so I could compare both files. Adding the movies (without screenshots) did not change the size of the database at all.

[itsme]

I found out this happens only, when I use ffmpeg for the creation of the screenshots. When I use MS Directshow file size is growing much slowlier. Unfortunately not all movie are avi...

I have ffdshow installed, perhaps this interferes with the ffmpeg you use?