Thank you very much for your advices.
As i said before i'm afraid to install this program because on VideoHelpthere is the following advice:
"Format Factory is a free multifunctional media converter. Provides functions below: All to MP4/3GP/MPG/AVI/WMV/FLV/SWF. All to MP3/WMA/AMR/OGG/AAC/WAV. All to JPG/BMP/PNG/TIF/ICO/GIF/TGA. Rip DVD to video file , Rip Music CD to audio file. MP4 files support iPod/iPhone/PSP/BlackBerry format. Burn in subtitles from srt/mkv. Source files support RMVB. Based on free software like ffmpeg. Warning! Format Factory installs K-Lite Codec pack that might cause problems with other video software on your computer"
As i have installed on my PC all this software:
1Click DVD Pro
i don't know if i will not have conflits...
Again, thank you very much Kerry :flower: