[PD] [GEM-dev] current version of GEM using QuickTime generates audio output!!!!!!!!!

Hans-Christoph Steiner hans at eds.org
Sat May 10 17:50:49 CEST 2008

On May 9, 2008, at 10:02 PM, zmoelnig at iem.at wrote:

> Quoting Matteo Sisti Sette <matteosistisette at gmail.com>:
>> Now, try it with a dv-pal AVI file with audio - or maybe with ANY  
>> avi file
>> with audio - or maybe even with a mov (I reproduced it with a dv- 
>> pal avi).
>> The annoying thing is that it is playing the file audio track, and  
>> it does
>> not come from PD (dsp is turned off). I dunnow where the heck the  
>> audio
>> comes from but i hear it.
>> If you don't activate the "auto" check nor move the frame number, a
>> 1-frame-long (which is 40msec) fragment of audio is repeated over  
>> and over
>> again, and the patch consumes almost 100% CPU.
> hmm, quicktime has the bad habit of playing back the audio of a movie
> on it's own.
> it is weird that it did not happen before.
> anyhow, i have uploaded yet another version to
> http://gem.iem.at/releases/0.91/gem-CVS20080509-W32-i686.exe
> this version should at least mute the audio-output when using  
> QuickTime
>> With old gem-CVS20060412-NT-i686 this doesn't happen, with the  
>> same version
>> of quicktime. GEM only reproduced the video, through QuickTime,  
>> and ignores
>> the audio (which is what you expect from GEM isn't it). Also, if  
>> you don't
>> activate "auto" nor move the frame number, it consumes much less  
>> CPU (which
>> is reasonable cause it's not decoding new frames).
> indeed
>> I guess I do can assume that 2006 version is also using quicktime  
>> because of
>> the "1" argument in the open message. I don't know if the attached  
>> output
>> (obtained with old 2006 version) (at the end of the message) 
>> confirms this.
> it does.
>> Why and where is the audio being played? How can I turn it off and  
>> avoid
>> useless cpu usage???
> i will probably have a look into the CPU-thing; nevertheless, there
> haven't been any real changes to the code (that would explain both the
> sudden appearance of sound and the cpu-thing)
> i assume that you are doing your tests on the same machine with just
> Gem.dll exchanged (so directX and quicktime should _really_ be the  
> same)
> anyhow, you probably will notice that Gem now comes as an installer  
> (.exe)
> i hope this eases the installation procedure...
> Hans, if you read this: is this installer ok for you too? (i guess you
> have downloaded the zip and extracted it manually, so there shouldn't
> be any real difference in terms of work)

Miraculously, I did read it.  But I don't understand the question.


> fgamdsr
> IOhannes
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