[FFmpeg-user] Differences downloading RA files with FFMpeg and mplayer

[bat guano]

Dear all,
I have noted some differences downloading ra files (via rtsp) using 
FFMpeg and mplayer, for example:

fmpeg -i 
rtsp://mm6.rai.it/radiofonia/radio3/napoli/cuoreditenebra/2011/cuoreditenebra2011_03_26.ra 
output1.ra
mplayer 
rtsp://mm6.rai.it/radiofonia/radio3/napoli/cuoreditenebra/2011/cuoreditenebra2011_03_26.ra 
  -dumpstream

if I listen the resulting files with FFPlay, they seems to be the same 
audio stream, but, if I open them with media player cassic (Real 
Alternative codecs), the file downloaded with FFMpeg have a bad quality.
Someone knows the reason? Maybe, seeking problems, I think, but I am not 
sure.
	
I use Windows XP, but I don't think it is the reason.
Thanks
Sandro


**********************************************
Hi Sandro
When you download with FFmpeg with command:-
ffmpeg -i rtsp://mm6.rai.it/radiofonia/radio3/napoli/cuoreditenebra/2011/cuoreditenebra2011_03_26.ra output1.ra
you are re-encoding the file. That's why the quality is poor.

When you download with mPlayer using command:-
mplayer rtsp://mm6.rai.it/radiofonia/radio3/napoli/cuoreditenebra/2011/cuoreditenebra2011_03_26.ra -dumpstream
you are dumping the file without re-encoding. The quality is the same as original.

So FFmpeg is not a good choice for this job.

mPlayer is best in this case. Especially if you use '-bandwidth 999999'.

Like this:-
mplayer -bandwidth 999999 rtsp://mm6.rai.it/radiofonia/radio3/napoli/cuoreditenebra/2011/cuoreditenebra2011_03_26.ra -dumpstream -dumpfile cuoreditenebra2011_03_26.ra

By using '-bandwidth 999999' the 50 minute show is downloaded in less than 2 minutes!
Here is the result:- http://www.mediafire.com/?8rqr1y8bkjj5e59
I don't understand Italian, but in this show they have been talking about Led Zeppelin!