I am doing a project. where i am mixing 2 vids (that bit done). I have a patch created that streams the wav of the video to an array (this bit also working). However if i launch the sound file as a subpatch and then launch the video, once the vid is launched the sound goes all wonky. How do I keep them in sync? I'd also ideally like to have sound files playing simultaneously if possible? I include a dropbox link to my patches, data files etc

https://www.dropbox.com/sh/r6t665axnccrzbt/AACR0CyLJxpf9oYIfN5UK_gca?dl=0

My project is due super-soon and I've only been learning pd for about 4 weeks so any help would be very much appreciated!!

@musicproject I am waiting for your patch to download, but in the meantime you could have a look at this............ http://stackoverflow.com/questions/14226869/how-to-keep-audio-and-video-gem-synchronised
David

@musicproject if you are using 1 patch for both gem and audio it most case it will cause glitches in the sound. you need to have 2 instances of pd, 1 patch for audio and 1 patch for video (i know... it sucks). but i think your problem was the sync of the audio and video, not sure if it is related.

Cheers~

@whale-av i came across that question. i didn't find a solution in the patches. Actually they were all made 3/4 years ago, there's been many releases since then!

thanks all for your replies. Busy sorting thru them. Keep the suggestions coming!

@musicproject as @EEight says you might need two instances of Pd to run that properly. That will be hard to understand and implement on your 4th day with Pd. It depends on your computer and graphics card though. The patches and video run fine on my machine (apart from hammering the fans!).........

There are a lot of things not connected up in the patches (between the patches I mean).......
If you unzip this and replace the files you have at the moment it will play in sync.
fix.zip
When you start the film with the message "auto 1" it will send a message to the sound chooser and start the audio as well......... see the object [s start2] in the main patch......(where the "s" means send)......... and in the soundchooser patch the object [r start2] (where the r means receive)........."start2" is like an address so don't use it again in the patches unless you want to receive the same message....
Its a start, but the patch is a long way from "automatic" or "user friendly".........
David.

@musicproject said:

musicproject posted about 3 hours ago • 0 Quote Reply
Posts 7 | Views 61 • browsing

thanks so much! i've just downloaded it, have to take a look at it. Was i anywhere close?

@musicproject I am still looking at the whole thing....... and might have to leave it till this evening. Sorry about the simplistic post........ I misread 4 weeks as 4 days and understood that it was someone elses old patch......
What machine are you running it on, and will it be the same for the presentation....?
David.

@musicproject hmm nope not working. But thanks anyway,

@whale-av its a windows 7, might be a mac for presentation

@musicproject Ok, I am starting to understand more. I have removed "theself" from 2 films mixed as I was getting a bit confused. DO NOT overwrite your project for now as I might not be understanding at all what you want to achieve.
Open the zip and move the 2 files into your folder where the old ones are (unless you are up to version 33).
If you click on the two top bangs it will give you the two videos to mix, as in sync as possible.
The fader fades the sound at the same time (set to start in the middle, but if you move it and save your patch it will "stick"......... be in that place when you open the patch again).......
The flip faders are also set to stick.........
I don't know what you want to do with your other 2 patches, so I have left them out of the mix for now.
fix33.zip
David

@whale-av it still sounds really staggered. the main wav is the self. the vantastival meant to loop thats why i had the metro as opposed to an auto on it, with a metro it will just play ad infinitum until the movie is destroyed. i actually would like to give the user the option of playing either sound and leave the user with a choice of turning one of the vids off (thats why i had toggles on the two gemheads, which seem redundant now?) and would like to give the option of toggling the sound file so it can play one or the other. Myabe this will clarify. top notch editing though, learning a lot!

@musicproject one easy thing to try is to put audio latency (buffer) way up, E.g. 200ms
EDIT: sorry, if this answer is a little unrelatet, i didn't read the whole thread very carefully. My suggestion was for crackling in the audio when using DSP and GEM in the same patch

@musicproject Ok....... not exactly what you want so please come back if you need help again. The video will loop.
I found two problems in your audio objects...... the expression object with 48000 in it will play at the wrong speed if the computer soundcard is set at 44100...... so I have put in an auto bit using [samplerate~]. That will also help fix the playback speed.
Also you were sending "sampleRate" using that same name in both audio patches, so they were talking to each other....... I have separated them by adding $0- at the beginning of the names which makes them unique for each patch........ that caused one of your problems!
I have not used the "choice"....... in fact I have not used "soundchooser33" at all...... I have put an audio fader in the main window instead..... it can all be changed again so let me know if that's good/bad....
fix34.zip
David.

@whale-av thanks. the rate was recorded at 48000. i recorded it myself. Just downloading your zip now. I've been at it for hours, gonna take a break!

@musicproject Yes....... it helps if your patch gets put on a Mac which is set to 44100..... it will automatically correct........ !breaks are a good idea!......
David.

@whale-av your updated vsn works quite well, but the self track doesn't play well. other than that everything mixes and everything. Some comments to explain what you did would be nice; vantastival plays ok. Just se;lf not syncing. thats my main problem

@musicproject I have added a delay to the start of the speech video. It is adjustable, but I think the delay of the audio is because (as always) the editor added 2 seconds of silence to the beginning when the audio was stripped from the video........they do that so that there is a pause between tracks......assuming that you are going to press a cd...... old world technology bleeds into the modern world.

I will write in explanations of what I have done and why to the patch....... but its time for bed and my daughters birthday tomorrow...... so probably on Sunday. Post what you finish up using back to me (not the av files) and I will annotate that as you might have changed something.

The first time it runs the videos it is out of sync. Restarting them puts them in sync. The audio files you have were stripped out at 44100Hz which means that they will not play at the right speed on your machine, and so will drift out, but every video restart will resync the beginning of the tracks.

It might be possible to do a fake start at loadbang so that when you press the start button they have already started once........ and so could be in sync.
fix35.zip
David.

@musicproject Daughter not out of bed so......... annotated a bit and false start added so as to (hopefully) have everything synced when you start the videos.
By the way, the volumes in your audio patches only affect the left channel of the tracks. I have left that as it is maybe intentional.
fix36.zip
David.

@whale-av hi David, I really appreciate all the effort you put into helping me. Unfortunately the sound doesn't sync on my machine. I've tried it on a mac and it doesn't sync there either. I'll try alternative routes (stackoverflow/my lecturer) for advice as I don't seem to be getting anywhere.

Thanks again.

Rachel

@musicproject Hello Rachel....... I played around this morning and watched the video to the end.
As I thought earlier the audio player is playing faster than the video. That can be corrected automatically using the extended version of Pd...... but to keep things simple you must resample your audio tracks at 48000Hz to match the video samplerate and the samplerate of your soundcard. If you have no audio editor that can do this I can upload and send you a link..... at the moment your videos are at 48kHz and your audio tracks at 44.1kHz.
Also...... here is a simpler audio player that might help with the cpu load....... fix37.zip
David.