Hi Fernando,

Apologies for the late response.

I (re)encoded the films in Avidemux on my Puredyne machine using the mjpeg codec. There is a Windows version of Avidemux too.

I switched to borrowed Windows and Mac machines for testing as my Puredyne lappy wont drive the patch. Too processing intensive. I had more problems on the Windows 7 machine but that may well have something to do with running 32b pd on a 64b machine, not sure, and didn't have enough time to test thoroughly.

There seems to be so many possible variables with OS's, graphics cards, etc. etc. that each use of video within pd has its own particular set of problems. As my films are quite static I reduced the frame rate and quality, which seemed to help. As someone just starting to work this way it does seem to have some tricky issues. I'm fairly determined to keep my work in pd so I expect to pick up more tips and tricks as the work progresses.

Best of luck with your patch and I hope the recoding may do the trick.

All good wishes,

Jb

On 2 October 2010 18:42, Fernando Krum ferkrum@gmail.com wrote:

Hi there J bz,

have just seen your thread over here and i´m sort of having a similar problem, i´m trying to play 2 videos simultaneously on a Windows machine. But whenever i try to make it fullscreen it will decrease framerate and apparently uses a lot o cpu processing... i think a have problems with encoders on my windows machine. which encoder are you using ??

thanx a lot,

Fernando.

Fernando Krum twitter.com/ferkrum

On Fri, Sep 24, 2010 at 4:57 PM, J bz jbeezez@gmail.com wrote:

...

---------- Forwarded message ---------- From: J bz jbeezez@gmail.com Date: 24 September 2010 20:56 Subject: Re: [PD] Fwd: GEM Neupert Tutorial '10-av-more control'. How do I play more than 1 video? To: Jack jack@rybn.org

Hi Jack,

Aaah, thank you indeed.

I checked the original on a mac today, and it sort of worked, no crashing.

Will report back after more testing.

Not the first time you have waded in and lent a hand, much appreciated.

Jb

On 24 September 2010 12:08, Jack jack@rybn.org wrote:

...

Try this patch and abstraction and use small soundfiles and movies to test. I don't know which video codec is better on Windows for your patch.

Le jeudi 23 septembre 2010 à 22:36 +0100, J bz a écrit :

...

Hi Benjamin,

Thanks for that, I will check it out.

Jack,

The machine I was testing with today was very souped-up and the [dsp] object never got over 25%.

I don't know if this would make a difference but the avi's are slightly longer than the audio, if the audio is driving the sync is it possible that that could cause the crashes? Also audio is 32bit floating point, if that could make a difference?

Still somewhat unsure about the best way of using the abstraction, if as I thought, to use 3 files I need 3 gemheads, how can I use 1 abstraction that contains a single gemhead? That was the impulse to use three different files. Then if I'm using 3 different files, why do I need to use $0, apart from good coding practice??

You needn't $0 in your patch but it is a good practice if you want to send variables in local. In your subpatch you use '$0-frame' to send the number of frame of your movies. The problem is all your receive $0-frame will receive the value of the 3 movies. So i remove these objects (heve a look inside the subpatch). ++

Jack

...

Guess I'm thinking aloud here.

With the first version that I made, all the files load fine and play, though there is now no sync now I stopped using [readanysf~]. S'pose one of the joys of pd is that there are umpteen ways of skinning any particular feline, though I really don't have the time to be starting from scratch again with this.

I'm going to make the audio 16b and trim the avi's so they are the same length as the audio.

Otherwise I'm really unsure what's going on.... This whole codec thing is a bloody nightmare.

Will try again tomorrow.

Cheers,

Jb

On 23 September 2010 17:51, benjamin 01xy benjah@free.fr wrote: hello,

    for audio, sfread2~ in moonlib worked well for me to scratch
    audio/video synchro, I think it is cross plateform
    https://wiki.puredata.info/en/sfread2~<https://wiki.puredata.info/en/sfread2%7E>

    ++Benjamin

    J bz a écrit :


            Avi's are 10fps mjpeg recoded in avidemux.

            Audio 44.1 wav in audacity
            All files play fine on the windows computer on their
            own.  I do get audio and one video, which works great.

            They also play fine in my earlier patch when I was
            first experimenting with GEM and video.  I went the
            Neupert way because I wanted more control.

            Other problem is that my ancient laptop wont come
            anywhere near running the patch, which is why I'm at a
            friends house.

            Aargh, this is bad, supposed to hand this in tomorrow.

            I have to go for a few hours but will be back later.
             Back at my friends in the morning but will be online
            again in a few hours.

            Attached is my original patch too.

            What I want is the ability to scrub audio and video
            but something that works.  Obviously.
            I was using [redanysf~] but the work needs to be seen
            on windows and mac and readanysf doesn't seem to work
            on windoze.

            I guess the most frustrating thing is that I have
            spent all afternoon wrestling with something that
            seems to be working on other computers. I added the
            [set( message as I have been trying anything I could
            think of.

            Thanks again,

            Jb

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