I used to convert game trailers to my PSP using the -muxvb option of ffmpeg a few months ago like this: ffmpeg -y -i "gametrailer.wmv" -title "my favourite game" -bitexact -vcodec xvid -s 320x240 -r 29.97 -qscale 4 -acodec aac -ac 2 -ar 24000 -ab 64 -muxvb 512 -f psp "gametrailer.MP4" This weekend (yesterday), I compiled another version of ffmpeg (mingw32) from CVS, and a few things seem to have changed. I couldn't find any postings in the mailing list archive that talk about this. So I wrote this email: (1) -vcodec xvid seems to be invalid now. I tried "-vcodec mpeg4" instead. While the trailer converted successfully, there is now a 2 second garbage/artifacts at the beginning of the trailer. The 2-second "visual noise" is there even though the source WMV seems to be clean. (2) -title does not seem to work. The title is empty after conversion. (3) All the -mux options seem to have go away. Do I still need to use it ? Is the missing muxvb causing the artifacts mentioned in (1) ? Has anyone encountered the same thing ? Thanks in advance for your help. Regards, Jin-Ho