[PD] Render a Gem window in [pd~] without dsp turned on

[Ed Kelly]

Hm. Perhaps you could use the CPU load to freeze video when it goes above 100%. Use the IEM version, which is more responsive than the built-in load meter.

An alternative would be to record an extra audio track using writesf~ with some synchronization data as audio, a bit like SMPTE used to work. Then at least you could framesync the audio in an NLE, somehow to track the frame you are recording via audio pulses of different frequencies - some signal derived from the frame number.

This is a problem I have faced many times, and although I tend to use two instances of Pd communicating with one another using netsend/netreceive, it's the same issue.

I haven't tried it yet, but I believe there is an external or something called "framesync"

Ed
 
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----- Original Message -----
> From: Antonio Roberts <antonio at hellocatfood.com>
> To: Max <abonnements at revolwear.com>
> Cc: PD list <pd-list at iem.at>
> Sent: Thursday, 9 May 2013, 21:16
> Subject: Re: [PD] Render a Gem window in [pd~] without dsp turned on
> 
>>  i think in your scenario you should record from within Pd, e.g. using 
> writesf~ then even if you hear clips while you are recording they will not be in 
> the recording.
> I understand that this will record the audio, but how would I then
> synchronise this with the video without resorting to guesswork?
> 
> Antonio
> 
> On 9 May 2013 10:15, Max <abonnements at revolwear.com> wrote:
>>  Am 08.05.2013 um 12:14 schrieb Antonio Roberts 
> <antonio at hellocatfood.com>:
>>>>  In order to make the pd~ process work without dsp you still need to 
> do a loadbang [pd dsp 1(, but then you may switch dsp off again after a second 
> or so.
>>>>  this technique works well.
>>>  I've tried this, and it's an improvement but it still causes 
> clipping
>>>  in the audio.
>>> 
>>>  Essentially, what I'm trying to do is a screen recording of myself
>>>  using a patch. Nearly all screen recording software for Linux use Alsa
>>>  so I'm unable to record audio, due to PD locking Alsa when it's
>>>  running. So, I instead am using Jack and this script
>>>  http://pastebin.ca/2373980
>>> 
>>>  However, even by separating the audio and video using [pd~] I'm 
> still
>>>  getting clipping in the audio
>> 
>>  i think in your scenario you should record from within Pd, e.g. using 
> writesf~ then even if you hear clips while you are recording they will not be in 
> the recording.
>> 
>>  m.
> 
> 
> 
> -- 
> ============================
> antonio at hellocatfood.com
> http://www.hellocatfood.com
> ============================
> 
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