I am glad you sent your profile, because I was testing what you last wrote which was
xvid 640x480 avi ac3 192
The profile you sent does not use that info.
Despite loading your profile I still do not have the problem
2-05-02 18:51:07 Info Compatible media types : DVD-R, DVD-RW Seq., DVD-RW RO, DVDRAM, DVD+R, DVD+RW, CD-R, CD-RW, DL DVD+R, DL DVD-R
2012-05-02 18:51:07 Info Drive has IDE-ATAPI physical interface
2012-05-02 18:51:07 Info New Drive selected : 0:0:0 - Optiarc BD ROM BC-5500A 1.79 [E] (Usb)
2012-05-02 18:51:07 Info Starting to burn converted files...
2012-05-02 18:51:07 Info Conversion process completed successfully
2012-05-02 18:51:07 Info *** File encoded successfully: Main feature.avi - Custom profiles New encoder context ***
2012-05-02 18:49:27 Info ************* Main feature.avi: Custom profiles - New encoder context *************
2012-05-02 18:49:27 Info [audio: #1 - ac3 main audio, 48000 kHz, 5.1 Ch., 384 kbps [Français]] -> [audio #1 - ac3 main audio, 48000 kHz, 5.1 Ch., 192 kbps [fre]]
2012-05-02 18:49:27 Info [subtitle: #2 - first_subtitle subtitle, 720x576 [Nederlands]] -> [video #0 - mpeg4 video, 640x480, YUV420P]
2012-05-02 18:49:27 Info [video: #0 - mpeg2video video, 720x576, YUV420P, 1,78] -> [video #0 - mpeg4 video, 640x480, YUV420P]
2012-05-02 18:49:27 Info Limit filesize to DVD5 (4.7Gb)
2012-05-02 18:49:27 Info *************************************************************************************
2012-05-02 18:49:24 Info AV LOADER: File "VTS_01_0.IFO" probed format is DVD-Video Demuxer
2012-05-02 18:49:24 Info Converted project will be burnt using E: drive
2012-05-02 18:49:24 Info Compatible media types : DVD-R, DVD-RW Seq., DVD-RW RO, DVDRAM, DVD+R, DVD+RW, CD-R, CD-RW, DL DVD+R, DL DVD-R
2012-05-02 18:49:24 Info Drive has IDE-ATAPI physical interface
2012-05-02 18:49:24 Info New Drive selected : 0:0:0 - Optiarc BD ROM BC-5500A 1.79 [E] (Usb)
2012-05-02 18:49:09 Info Video structure loaded successfully from:Y:\Video\DVD\DVD5\Die_Hard_4_Retour_en_enfer\VIDEO_TS\VIDEO_TS.IFO
2012-05-02 18:49:09 Info AV LOADER: File "VTS_01_0.IFO" probed format is DVD-Video Demuxer
2012-05-02 18:49:06 Info 9 Menu templates loaded.
2012-05-02 18:49:04 Info 9 Menu templates loaded.
2012-05-02 18:49:03 Info No disc in drive.
2012-05-02 18:49:02 Info Available Memory : 1712 Mb.
2012-05-02 18:49:02 Info Total Memory : 4092 Mb.
2012-05-02 18:49:02 Info Available extended Virtual Memory : 0 Mb.
2012-05-02 18:49:02 Info Available Virtual Memory : 1854 Mb.
2012-05-02 18:49:02 Info Total Virtual Memory : 2047 Mb.
2012-05-02 18:49:02 Info Memory Load : 87%
2012-05-02 18:49:02 Info Available Physical Memory : 259 Mb.
2012-05-02 18:49:02 Info Total Physical Memory : 2046 Mb.
2012-05-02 18:49:02 Info System default language : Français (France)
2012-05-02 18:49:02 Info User default language : Français (France)
2012-05-02 18:49:02 Info Version : 2.0.0.7
2012-05-02 18:49:02 Info ExeName : C:\Program Files\VSO\DVD Converter Ultimate\2\DVDConverterUltimate.exe
2012-05-02 18:49:02 Info OS : Microsoft Windows 7 Home Premium (Build 7601: Service Pack 1)
2012-05-02 18:49:02 Info Compatible media types : DVD-R, DVD-RW Seq., DVD-RW RO, DVDRAM, DVD+R, DVD+RW, CD-R, CD-RW, DL DVD+R, DL DVD-R
2012-05-02 18:49:02 Info Drive has IDE-ATAPI physical interface
2012-05-02 18:49:02 Info New Drive selected : 0:0:0 - Optiarc BD ROM BC-5500A 1.79 [E] (Usb)
2012-05-02 18:49:02 Info Compatible media types : DVD-R, DVD-RW Seq., DVD-RW RO, DVDRAM, DVD+R, DVD+RW, CD-R, CD-RW, DL DVD+R, DL DVD-R
2012-05-02 18:49:02 Info Drive has IDE-ATAPI physical interface
2012-05-02 18:49:02 Info New Drive selected : 0:0:0 - Optiarc BD ROM BC-5500A 1.79 [E] (Usb)
2012-05-02 18:49:01 Info Using Advanced SPTI interface
2012-05-02 18:49:01 ---- ******************** Log session start 02-mai 18:49:01.288 PID 168********************