Problemi compressione MOV

[Dottor Brè]

ciao a tutti
acquisendo da nastro DV, ora ho un fimato da 60 minuti su 12giga.
Ho provato a dimagrirlo con finalcutexpress (mov 2 mov), ma con 6 giga il risultato faceva quasi schifo.

quindi ho provato con ffmpegX, stavolta mov to mpeg2: dopo 1h40 minuti risultato:
FAILED

Encoding started on Mon Apr 26 08:42:24 CEST 2004
Input #0, yuv4mpegpipe, from 'pipe:':
Duration: N/A, bitrate: N/A
Stream #0.0: Video: rawvideo, yuv420p, 720x480, 23.98 fps
Output #0, rawvideo, to '/Users/cristian/Desktop/sikulaDVD.mpv':
Stream #0.0: Video: mpeg2video (hq), 720x480, 23.98 fps, q=2-20, 4000 kb/s
Stream mapping:
Stream #0.0 -> #0.0
[mpeg2video @ 0x1b7ec4]rc buffer underflow
bench: utime=1388.090s
Input #0, mov,mp4,m4a,3gp, from '/Users/cristian/Movies/Vacanze2003/Vacanze2003.mov':
Duration: 00:29:43.3, bitrate: 1 kb/s
Stream #0.0: Video: dvvideo, 720x576, 25.00 fps
Stream #0.1: Audio: 0x61766476, 48000 Hz, stereo
Output #0, ac3, to '/Users/cristian/Desktop/sikulaDVD.ac3':
Stream #0.0: Audio: ac3, 48000 Hz, 5:1, 448 kb/s
Stream mapping:
Stream #0.1 -> #0.0
Unsupported codec (id=0) for input stream #0.

dov'è l'errore?