[vlc-devel] Time-Scaling Library
cerm333333 at aol.com
Fri May 26 07:39:29 CEST 2006
The VLC Project is amazing, and I'm proud to use it. Something that
would make it more useful would be the ability to time-scale the
playback. In particular, to increase the playback speed to 1.5x to 2x
realtime, and still be able to hear properly pitched, in-sync audio.
Windows Media Player, Apple's Quicktime, and Media Player Classic all
support this feature, but the play-speed adjustments don't work right
with all file-formats in each player. VLC supports all of the
file-formats that anyone would need on a daily basis, and if it had just
that one extra feature, it would that much closer to perfect.
I don't know much about the inner-workings of VLC, but I have found an
open-source library for time/pitch processing of audio. It's available
at http://www.surina.net/soundtouch. If that could be used for the
audio processing, then it should just be a matter of tweaking the video
frame rate, and maintaining sync.
I initially contacted Antoine Cellerier with this suggestion. He said
that this was a feature that has been considered for inclusion, but so
far there hasn't been sufficient time. He asked that I send my message
to you all. Hopefully somebody has the time to work this into the
project. I'd love to do it myself, but unfortunately my knowledge of C
begins with "Hello World", ends with arrays, and I couldn't compile a
DLL if I tried. Thanks for indulging me, and keep up the good work!
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