I am having the same problem with mythbackend reporting a transcode
error due to "Unknown video codec". 

In mythfrontend, I set up the following paramters to transcode to MPEG-4:
        - Software Encoders (v4l based)
                        Default
                                Profile name: Default
                                Enable auto-transcode after recording
                                Width: 640
                                Height: 480
                                Codec: MPEG-4
                                Bitrate: 2200 (about 1Gig/hr)
                                Maximum quality: 2
                                Minimum quality: 15
                                Max quality difference between frames: 3
                                Scale bitrate for frame size
                                Enable high-quality recording

I have the xvidcore and xvid4conf rpms installed from freshrpms.


The specific error message is as follows:

2006-11-22 20:14:09.433 JobQueue: Transcode Starting for Ask This Old House 
"Replacing an Exterior Deck": 496.4 MB (Autodetect)
2006-11-22 20:14:09.596 Using runtime prefix = /usr
2006-11-22 20:14:09.614 New DB connection, total: 1
2006-11-22 20:14:09.620 Connected to database 'mythconverg' at host: localhost
2006-11-22 20:14:09.623 Enabled verbose msgs: important
2006-11-22 20:14:09.626 New DB connection, total: 2
2006-11-22 20:14:09.627 Connected to database 'mythconverg' at host: localhost
2006-11-22 20:14:09.630 Transcoding from 
/mnt/scratch1C/video/1002_20061122193000.nuv to 
/mnt/scratch1C/video/1002_20061122193000.nuv.tmp
2006-11-22 20:14:09.646 Connecting to backend server: 192.168.1.145:6543 (try 1 
of 5)
2006-11-22 20:14:09.648 Using protocol version 31
2006-11-22 20:14:09.649 MainServer::HandleAnnounce Monitor
2006-11-22 20:14:09.650 adding: consult.pretender as a client (events: 0)
2006-11-22 20:14:09.652 MainServer::HandleAnnounce Monitor
2006-11-22 20:14:09.652 adding: consult.pretender as a client (events: 1)
2006-11-22 20:14:09.699 New DB connection, total: 3
2006-11-22 20:14:09.710 Connected to database 'mythconverg' at host: localhost
2006-11-22 20:14:09.737 Unknown video codec: 
2006-11-22 20:14:09.738 Transcoding 
/mnt/scratch1C/video/1002_20061122193000.nuv failed
2006-11-22 20:14:09.739 Deleting 
/mnt/scratch1C/video/1002_20061122193000.nuv.tmp
2006-11-22 20:14:09.754 JobQueue: Transcode Errored: Ask This Old House 
"Replacing an Exterior Deck": (Autodetect)


Any suggestions on what to do?

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