2 Commits

Author SHA1 Message Date
Pavel Koshevoy
5fa8226420 libavfilter: improve atempo audio quality
Reduce audio fragment alignment jitter by penalizing alignment
correction offsets that deviate too much from the target offset.
This is accomplished by multiplying the cross correlation search
window with a quadratic function.

Signed-off-by: Pavel Koshevoy <pavel@homestead.aragog.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2012-06-19 17:29:27 +02:00
Pavel Koshevoy
a1aac8d004 lavfi: add atempo filter
Add atempo audio filter for adjusting audio tempo without affecting
pitch. This filter implements WSOLA algorithm with fast cross
correlation calculation in frequency domain.

Signed-off-by: Pavel Koshevoy <pavel@homestead.aragog.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
2012-06-17 12:50:35 +02:00