The VideoLAN Forums

Hi,

I'm trying to determine when reading a media file if it's audio only (i.e. mp3) or has video (i,e. mp4). If possible, I don't want to rely in the file extension. I've noticed a structure called libvlc_track_type_t (which has audio and video representations) but can't see any library function which uses it. Is it possible to determine if a file is audio only or is video using this structure or is there another way?

Thanks,
Mike

Sure I guess. These are tracks though, but if there is no video track, I guess you could assume it is an audio file.

A quick and dirty (but far from foolproof) method would be to look at the first few bytes of the file - if it contains the string "ID3" you could be reasonably sure it's an MP3, or if it has the string "RIFF" you could be reasonably sure it's a wave audio file.