[vlc] VLC as transcoder, bugs...

[Arioch]

VLC 0.9.8a on WinXP (though think it is irrelevant)

One of my mates asked how he can rip audiotrack from DVD-Video to his  
player.
I wanted to suggest VLC. Thanks heaven i did not do it and tried instead  
myself.

Let us not talk of complex formats like MKV with a muber of audio streams  
an subtitles sreams (though AFAIr DVD can have both).

Let's take simplistic AVI with 1 video + 1 audio.

~~~ source by MediaInfo ~~~~
Format                           : AVI
Format/Info                      : Audio Video Interleave
File size                        : 250 MiB
Writing application              : VirtualDubMod 1.5.4.1 (build  
2178/release)

Video
Format                           : MPEG-4 Visual
Format profile                   : Streaming Video at L1
Codec ID                         : XVID
Frame rate                       : 23.976 fps

Audio
Format                           : MPEG Audio
Format version                   : Version 1
Format profile                   : Layer 3
Bit rate mode                    : Constant
Bit rate                         : 160 Kbps
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Quite a usual file, isn't it ?

So i just try to save audio-track into ogg-file.

0) Open dialog, when i paste filename in different folder than it was, i  
expect it (at least in Windows) to change foder and nexttime open in that  
folder, where the opened file was. It does not happen. But its not on  
topic of transcoding.

1) i want only quickly get audio out, so i check Audio and select Vorbis  
format and press ok - diaog closes and nothing happens. Just nothing.
Ok, i did not checked neither "play locally" nor "save to file", blame me.  
However i expect VLC would stop me from pressing OK if i selected to do  
nothing.

2) I set the file to save to and press ok. Nothing happens. Why ? Seems i  
did not selected encapsulation. Again - why VLC did not required it ?

3) I selected Ogg container. And pressed ok. And now VLC started  
"streaming". And as i pressed stop (i do not need all the sound, only some  
part), i see the file on the disk. Yet neither payer, nor VLC itself, can  
open it w/o errors. So what is the resulting format ?

~~~~~~ result by MediaInfo ~~~~
Format                           : OGG
File size                        : 2.59 MiB
Writing application              : VLC media player

Video
ID                               : 27798 (0x6C96)
Format                           : MPEG-4 Visual
Codec ID                         : XVID
Width                            : 4 096 pixels
Height                           : 2147483 648 pixels
Display aspect ratio             : 0.000
Frame rate                       : 0.000 fps

Audio
ID                               : 27797 (0x6C95)
Format                           : Vorbis
Format settings, Floor           : 1
Duration                         : -596h 31mn
Bit rate                         : 128 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 48.0 KHz
Writing library                  : libVorbis 1.2 (UTC 2007-06-22)
~~~~~~

Where is that videotrack appeared from ? And why it has FPS=0 then,  
omitting width and height? And afteral, why audiotrack duration is below  
zero ?

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