that is all a well known short-coming to mp3 format: mp3's doesn't allow or cope with frame accurate seek or relocation: you often have to decode the nearest header and block all the way to the point or frame you seek for: and if the mp3 is encoded as VBR (variable-bit-rate) than forget all hope of accuracy or precision on that matter.
bottom line is, kind of a caveat emptor: don't count on frame accuracy when dealing with mp3 files--it's a PITA--and mp3 support in qtractor (via libmad) has been just as naive as convenient it goes.
and now i even remember, i've been considering dropping it altogether, as i don't have use for no mp3's, for years now. as the old flick says: quite frankly my dear, i don't give a damn (to mp3 anymore) ;)
that is all a well known short-coming to mp3 format: mp3's doesn't allow or cope with frame accurate seek or relocation: you often have to decode the nearest header and block all the way to the point or frame you seek for: and if the mp3 is encoded as VBR (variable-bit-rate) than forget all hope of accuracy or precision on that matter.
bottom line is, kind of a caveat emptor: don't count on frame accuracy when dealing with mp3 files--it's a PITA--and mp3 support in qtractor (via libmad) has been just as naive as convenient it goes.
and now i even remember, i've been considering dropping it altogether, as i don't have use for no mp3's, for years now. as the old flick says: quite frankly my dear, i don't give a damn (to mp3 anymore) ;)
sorry but true
cheers