XviD/AVI Decoding Problem

I tried to encode an AVI that has Xvid into an H.264. However, it only encoded the audio and not the video. Here's a description on the video.

Format : MPEG-4 Visual
Format profile : Streaming Video@L1
Format settings, BVOP : Yes
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default
Codec ID : DX50
Codec ID/Hint : DivX 5
Duration : 2h 26mn
Bit rate : 683 Kbps
Width : 672 pixels
Height : 272 pixels
Display aspect ratio : 2.471
Frame rate : 25.000 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.150
Stream size : 714 MiB (85%)
Writing library : XviD 1.0.3 (UTC 2004-12-20)

I found out that it can't decode a resolution over 12 bits. How can I solve this problem?