encode video in double speed playback

[borra]

I am taking a video course, and I listen to them in double play back speed, and I have the "Scale audio tempo in sync with playback rate" selected so the instructors don't sound like Mickey Mouse.

Its no hassle to change my videos manually to 2x speed when I am on my PC, but I want to encode them so I can watch the video's, well mainly listen to the video's on my iPod in 2x speed. Is there any way I can encode the videos so when I play them at 1x speed on my iPod it will play as though I changed the playback to 2x and had the "Scale audio tempo in sync with playback rate" selected?

I know, its a strange question. Hopefully its possible and one of you know how.

-Borra

[VLC_help]

AFAIK the playback speed change cannot be used for transcoding. I could be wrong on this, but I haven't seen the option to change it.

[borra]

ok thanks.

[fluxthis]

I want to do the exact thing... I think I figured out a way to do it.

Basically, what you do is, go into the "preferences" and change the audio output to "File Output" to some file "x". Then play the lecture file (remember to restart VLC before doing this to make the preference change occur) and make the play speed 2x.

Once the lecture is done you'll have a file ("x") that has 2x speed, though the prob is that this is in some weird format that your mp3 will not be able to play.

So you'll have to transcode your file "x" into "lecture.mp3" (which can be done in 1 step using the new transcoding options, just convert the file "x" using the "Audio - mp3" profile).

Once that's done you'll have an mp3 file that has your lecture at 2x speed.

The problem with this is that its kinda time consuming, since it has to play the whole lecture at 2x speed to make that first file. So if anybody knows how to make this quicker or more automatic that would be appreciated.