LAV Video Decoder crashes when playing i420

[tyee]

I have this old 720x480 version of a 3D movie using field sequential encoding and I'm trying to just play it back in mpc-hc v1.7.7 32 bit. Note that the 3D has nothing to do with playback at this point. I will process it later after I get it to just playback. I load the file into an avs script using either directshow or dss2 and both crash the LAV decoder just before it trys to play. I added the ffdshow video decoder to the external filters list and set it to preferred and it plays just fine. Here is the description of the file from mpc-hc properties when ffdshow is playing it -

Video: I420 720x480 29.97fps [V: rawvideo, yuv420p, 720x480]

Any tips on why LAV can't decode it. I don't see i420 in the listing when I bring up the LAV video decoder properties within mpc-hc, the closest to that is v210/v410.

Another note - input bitrate shows as 124 Megabits/sec! Why, I have no idea?