Re: [PD] line~ for syncing to video

[Hans-Christoph Steiner]

That seems like a lot more work, converting from message to DSP and back to messages. Do you think that the timing of [metro] is not accurate enough? I basically created a [line] that is driven by the frame numbers, then feed that to [line~] when needed. Seemed to work pretty well. See attached patch.

syncline.pd
Description: Binary data

.hc

On Nov 12, 2008, at 5:55 AM, cyrille henry wrote:

hello,



see attachement patch.

cyrille


Hans-Christoph Steiner a écrit :

you can use frame number as a trigger, that's not incompatible with a sync from audio to video.

What I am working on are tools for composing audio to someone else's video. I've worked on a couple projects like this, I am in the midst of one know. Basically, think sound design for a movie and things like it. They generate the movie, and so far, I have found the easiest way to communicate with the people making the video is to use frame numbers. Therefore, to compose my sound, I need to frame numbers as a reference. Therefore, I need to generate line data from video frame numbers, unless someone has a better idea. If the video guys tell me, "this animation starts on frame 1234 and ends on 1623", then it seems to me that I want to be using frame numbers as my triggers.

.hc
On Oct 31, 2008, at 11:08 AM, chris clepper wrote:

Cyrille points out the correct method of syncing video to an audio clock. All hardware devices and professional software use the audio to clock the video.

On Fri, Oct 31, 2008 at 4:48 AM, cyrille henry <[EMAIL PROTECTED] kitchen.fr <mailto:[EMAIL PROTECTED]>> wrote:

    hello,

    i'm wondering why did you sync audio on video : i think it is
    easier to sync the video on the audio.

    periodically and convert audio position to frame number...

    cyrille


    Hans-Christoph Steiner a écrit :

    > on the frame numbers I give it.  Basically, I give it a frame
    counter

    > last value stays in effect until something else overrides it.
    >
    > How do I do that with DSP data?  If I use [switch~], then the
    > [outlet~] will just retain its last value.
    >
    > .hc
    >
    >
    >

    > ----
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    > 'You people have such restrictive dress for women,' she said,
    > hobbling away in three inch heels and panty hose to finish out

    Kahf
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just make all the line~ as you wish for the audio, then snapshot~ > I am trying to make a version of [line~] that gives me a line based > in the first inlet, then start frame and stop frame as arguments. > The hard part is that I want it to behave like [line] in that the -------------------------------------------------------------------- ---- > another pink-collar temp pool day. - "Hijab Scene #2", by Mohja

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If you are not part of the solution, you are part of the problem.

#N canvas 64 128 625 478 10;
#X obj 79 193 line~;
#X floatatom 79 25 5 0 0 0 - - -;
#X text 130 25 frame number;
#X obj 79 45 / 25;
#X text 135 45 time in s;
#X obj 79 73 * 1000;
#X text 143 73 time in ms;
#X obj 79 97 t f f;
#X obj 79 146 pack f f;
#X obj 111 119 + 100000;
#X msg 79 169 \$1 \, \$2 100000;
#X text 186 169 go to 100 0 ms latter \, in 100 000ms;
#X text 126 194 master time for everything (in ms since beggining of
files);
#X obj 215 236 *~ 44.1;
#X text 280 237 position in the audio file;
#X obj 79 314 snapshot~;
#X obj 100 288 metro 1;
#X obj 100 265 loadbang;
#X text 170 289 1ms precision for video is ok;
#X obj 79 340 / 40;
#X text 125 343 time of each frame;
#X obj 79 363 i;
#X obj 79 384 change;
#X text 146 386 frame number;
#X floatatom 92 409 5 0 0 0 - - -;
#X connect 0 0 13 0;
#X connect 0 0 15 0;
#X connect 1 0 3 0;
#X connect 3 0 5 0;
#X connect 5 0 7 0;
#X connect 7 0 8 0;
#X connect 7 1 9 0;
#X connect 8 0 10 0;
#X connect 9 0 8 1;
#X connect 10 0 0 0;
#X connect 15 0 19 0;
#X connect 16 0 15 0;
#X connect 17 0 16 0;
#X connect 19 0 21 0;
#X connect 21 0 22 0;
#X connect 22 0 24 0;

Mistrust authority - promote decentralization.  - the hacker ethic



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