I got this error trying to make a slideshow in mandvd.
Error while opening codec for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height
The problem comes from dvd-slideshow that passes the wrong bitrate to ffmpeg. To correct this, modify line 4004 and change 192 to 192000
this fix could be added to this package dvd-slideshow-0.8.0_1-noarch-1vl60
also when i installed mandvd with slapt-get I had to download these deps manually dvd-slideshow, mjpeg, dvdauthor, and transcode