"fixed" AVI has audio sync and video blocking problems

[timur]

I created some AVIs using Handbrake to rip them from a DVD. My DVD player wouldn't let me fast-forward or rewind these AVIs, so someone suggested that I use ffmpegX to "fix" them.

I tried that, but the resulting AVIs have serious problems. The audio is out-of-sync (by a couple seconds, at least), and there is significant blocking during playback. Can anyone tell me what's wrong?

Here's the log during the fix process:

MEncoder dev-CVS-060307-04:23-4.0.1 (C) 2000-2006 MPlayer Team
FIXME:Hardenabling SSE and SSE2 without detection
CPU: Intel (Family: 6, Stepping: 11)
CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2
success: format: 0 data: 0x0 - 0x1999e800
AVI file format detected.
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AVI: Generated index table for 197725 chunks!
VIDEO: [DX50] 720x480 24bpp 23.976 fps 999.9 kbps (122.1 kbyte/s)
[V] filefmt:3 fourcc:0x30355844 size:720x480 fps:23.98 ftime:=0.0417
Writing header...
Writing header...
1 duplicate frame(s)!
( 0%) 0.00fps Trem: 0min 0mb A-V:0.056 [0:128]
1 duplicate frame(s)!
1 duplicate frame(s)!
1.3s 30f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.060 [735:128]
1 duplicate frame(s)!
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1008:128]
1 duplicate frame(s)!
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min 0mb A-V:0.033 [1142:128]
1 duplicate frame(s)!
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0%) 0.00fps Trem: 0min 0mb A-V:0.004 [1209:128]
1 duplicate frame(s)!
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:128]
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0min 392mb A-V:-0.050 [1291:128]
1 duplicate frame(s)!
( 0%) 0.00fps Trem: 0min 407mb A-V:-0.075 [1190:128]
1 duplicate frame(s)!
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1 duplicate frame(s)!
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Skipping frame!
: 0min 407mb A-V:-0.046 [1175:128]
Skipping frame!
n 408mb A-V:-0.084 [1084:128]
Skipping frame!
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8f ( 0%) 0.00fps Trem: 0min 407mb A-V:-0.071 [1075:128]
Skipping frame!
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rem: 1min 402mb A-V:-0.057 [1024:128]
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s: 24.2s 548f ( 0%) 0.00fps Trem: 1min 401mb A-V:0.021 [1020:128]
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394mb A-V:0.049 [990:128]
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5.6s 845f ( 1%) 751.78fps Trem: 1min 395mb A-V:0.086 [908:128]
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[snip]

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n 402mb A-V:0.080 [985:128]
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0min 402mb A-V:0.084 [985:128]
Writing index...
Writing header...
Video stream: 984.901 kbit/s (123112 B/s) size: 370513551 bytes 3009.548 secs 72220 frames
Audio stream: 128.000 kbit/s (16000 B/s) size: 48168000 bytes 3010.500 secs

[Case]

I created some AVIs using Handbrake to rip them from a DVD. My DVD player wouldn't let me fast-forward or rewind these AVIs, so someone suggested that I use ffmpegX to "fix" them.

I can understand that a set top player won't let you FF or RW on AVIs with a broken index. Surely the player wants AVI files to have a good index. But that doesn't automatically mean that rebuilding an AVI index will add these features to good files from HandBrake. Just saying I'm not convinced yet.
No idea on why the fix turned out so bad, either.