Strange mp4, ffmpeg fails...

[elmuz]

Hi everybody,
strange thing... I had some videos coming from user which are very strange. They are clips made with mobile phones, and they should be processed to be played in our video webplayer (flash).
The pipe is when video are uploaded by user ffmpeg acts and encode file in a proper mp4 (h264 baseline, aac)...
This time ffmpeg fails, even if metadata say it's made by ffmpeg...

General
Complete name : C:\Documents and Settings\....\1308230890.mp4
Format : MPEG-4
Format profile : 3GPP Media Release 5
Codec ID : 3gp5
File size : 2.21 MiB
Duration : 55s 300ms
Overall bit rate : 335 Kbps
Movie name/More : Created on ADI mobile technology
Make : LG_Electronics
Model : GW300

Video
ID : 1
Format : MPEG-4 Visual
Format profile : Simple@L1
Format settings, BVOP : No
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Codec ID : 20
Duration : 55s 140ms
Bit rate mode : Constant
Bit rate : 321 Kbps
Nominal bit rate : 64.0 Kbps
Width : 176 pixels
Height : 144 pixels
Display aspect ratio : 1.222
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Stream size : 2.11 MiB (96%)
Writing library : FFmpeg0.4.8b4716
Language : English

Audio
ID : 2
Format : AMR
Format/Info : Adaptive Multi-Rate
Format profile : Narrow band
Codec ID : samr
Duration : 55s 300ms
Bit rate mode : Constant
Bit rate : 12.8 Kbps
Channel(s) : 1 channel
Sampling rate : 8 000 Hz
Bit depth : 13 bits
Stream size : 86.4 KiB (4%)
Writing library : (empty)
Language : English

If I try to play it in ffplay I get error... how it come? It's encoded by some old version of ffmpeg! I can only play it by using directshow (I attach graphedit)...

Any suggestion?