The VideoLAN Forums

My VLC cannot pick up the audio from all flv.formatted videos i download. It reports that "UNDF" cannot be read properly for either sound or video, but its always the sound. How do i fix this?

Can you give us samples?

There are samples here

http://www.mediafire.com/?eigbrjtj5gw

the RAR contains three FLV files. On VLC there is video but no sound. They originally came from YouTube and MediaInfo says the video stream is Sorenson H263. I am new to this so I don't know if that means there is no audio track or if it means the video stream includes the audio. MediaInfo does not mention audio for these files.

I have this same problem with .flv videos downloaded from Tudou (http://www.tudou.com). I have previously been able to buffer the .flv file to my HD, then copy it to where I want to save the file, but it appears that they changed the format so now the sound doesn't work in VLC. Here are some things I've noted:
1) In VLC (latest version, 'h') there is video but no sound.
2) In WinAmp, there is sound, but no video
3) Using the IrfanView video player everything works fine (I just don't like IrfanView for watching videos)

So it appears that all the encoding is valid, it's just that VLC is not reading it properly?

I'm adding a link to a file I uploaded. The .zip contains the first part of a Top Chef episode I downloaded with the above issue:
http://uploadingit.com/files/685221_itrj0/7a.zip