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View Full Version : bpm sync software?


rudehead
11th June 2002, 03:26 AM
hi guys

I'm a new member with just one question.

Is there a program out there (PC pref.) that alters the frame rate of an .avi according to the bpm of an external sound source or midi clock signal?

any hints would be greatly appreciated

rudehead
11th June 2002, 01:55 PM
yes?
no?
wait?
maybe?

MoRpH
11th June 2002, 02:35 PM
Yeah I think Flowmotion can sync to an external midi clock :)

robotfunk
11th June 2002, 02:42 PM
the first version of flowmotion had this function, as syncing to music tempo is one of the main concepts in the app.

I removed it because I was not happy with how badly it performed. Due to the nature of midi clock ( 24 ticks get sent per 1/4 note, you have to measure the time between them to sync) you must be able to check for tick messages every few ms ...
when you miss one or two you start to lose sync, and as soon as some heavy compositing/fx was going on this started to happen.

I'm in the process of converting all my fx to threaded versions, hopefully when this is done ( a lot of work ) i can guarantee accurate results and turn it on again. I solved this problem for myself with a small custom MIDI hardware solution designed by Thorsten Klose ( www.ucapps.de ) .. but I don't see a possibility to mass manufacture this and don't think I can expect customers to solder their own. If you are interested I'm sure he will send the chip code or even program a chip for you. I'm also working with another software developer to develop an external software component for syncing to MIDI clock.

In the mean time I have a much simpler solution in flowmotion, just tapping the space bar to the beat of the music. When you stop tapping, it continues in the tempo you were going.
The advantage of this is that you can easily sync to non MIDI musical sources such as turntables or acoustic musicians

rudehead
11th June 2002, 03:13 PM
thanks guys

the hardware option sounds pretty full on, but i will check out Flowmotion.

many2
11th June 2002, 05:15 PM
visualJockey R3 will let you change the rate, direction and a whole lot of other parameters for any combination of AVI files. Each of the parameters can be controlled by any combination of input channels : music-analysis (with BPM, gain tendency, sound brightness, etc.), keyboard, mouse, LF oscillators, MIDI etc. You can do full-scale video scratching, or on beat forward-reverse, or on beat speed-change, or any mix of these ! If you still have more complex needs in the AVI department check out the Advanced AVI loader, you won't believe what is possible with this one !

There is also a new plugin developped by peteWarden (Free :) ) that allows you to control the playback of a frame buffer made with any input. This build a buffer containing a defined number of frames in memory, each new frame added to the list as the last one is removed. The playback head can then move in this cache according once again to any channel input (music, MIDI, etc). With this you can make on-beat video scratching with something that isn't an AVI, like a video-input ! It is amazing but it's still in development. Visit the visualJockey board for more info on this one.

http://www.visualjockey.com/

Many-2