Comments on: WarpPlayer

By: Li

Li — Wed, 23 Sep 2009 01:00:16 +0000

I can confirm that building a mixer and time stretching the total output is definitely possible. So on the audio side, yeah, go for it, flash player 10 has everything you need.
On the other hand I’m not so sure about video. With regular flash ‘pseudo’ flv streaming I found that the best sync I could get could produce offsets between the audio and the video of up to 300ms, which is a lot sometimes. I have yet to experiment with Flash Media Server with which real streaming could be done and hopefully calls to seek() would take less time to process and hence reduce the offsets. This is just my theory though, I still need to test this.

By: Carl Stenqvist

Carl Stenqvist — Tue, 22 Sep 2009 21:49:18 +0000

Hi, I work as a sound designer and music producer at Plan8 in Stockholm, Sweden. I´m not a programmer, but could the code you use in WarpPlayer be used to do perfect synch of an or several audio files to one flv file? I want to be able to put several layers of sounds and turn them on or off in precise synch to cues in the flv. I then, also would like to be able to slow down or speed up the film including the several soundlayers. I would want the sound layers / sounds to be separate from the flv som I can easily change them without having to change the video content. Is this possible to accomplish? Thanks

By: Li

Li — Thu, 27 Aug 2009 18:37:56 +0000

Yes, it would be very useful. It can definitely be done with audio, check out Ryan’s latest experiment: http://static.ryanberdeen.com/projects/soundtouch-as3/demo/player/player_tdsi.swf

Syncing videos is a bit behind atm though. Warpplayer’s current precision can yield up to 300ms of offset between the video and the audio. I’m currently testing with FMS, maybe there is a bit more seek control on videos with it.

By: Mathieu

Mathieu — Thu, 27 Aug 2009 13:41:58 +0000

this is very cool! I think it will definately be useful for musicans and others.

I think it would be great if you can also accelerate the tempo, keeping the same sound pitch. in fact that can be cool for all the videos on internet where you want to fast forward or slow motion which we had in tapes!

By: Li

Li — Sun, 09 Aug 2009 05:06:46 +0000

Hi Gabriel,

Warp player would exceed your needs in regard to its time-stretching capabilities. From what you say, you don’t need to alter the speed of playback. You simply need to trigger sounds at specific locations of a canvas and then overlap the resulting audio composition with a muted video.

You should be able to do this without using dynamic sound at all (fp10). However, with this you would encounter some inaccuracy of a few ms in the triggering of the sounds, but then again, since you are not making musical compositions here you wouldn’t need to worry about this. If you decide to go this way, the regular as3 fp9 API should provide you with all you need.

If you do need to be accurate in the triggering of the sounds, you would need to use fp10, but the perfect library for you would be StandingWave. In its current state, it can give you all you need with perfect accuracy.

I’d love WarpPlayer to be of use to you, but given your situation I’d recommend choosing one of the 2 options above unless you wan’t to alter playback speed. That’s what WarpPlayer is meant to do.

Good luck with the project, the site looks very nice!

By: gabriel caires

gabriel caires — Sun, 09 Aug 2009 04:45:58 +0000

Hi, i am braziliam developer and i work on project named "Tela Brasil" which is a school of Cinema.O site has several exercises for students to learn the basics of producing filmes.Em one of the exercises is past the basic concept of a movie soundtrack, where you can insert "layers" of sound in a movie. Still working on this project, so I am interested in "WarpPlayer" I can help with anything?