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Re: Audio Capture - File Sizes Double

dean perry's Atomiser class does this as well,
there is a java app version on his site. that'll run on X,

i forget the url to his site though... pointy ltd.. dean?
rf



> Problem you already did this, but it may be worth taking a look at the
> file in Dumpster, which is on
> the Apple Quicktime tools site. Handy tool for dumping the innards of a
> Movie file by tracks/atoms etc...
>
> OS 9 only still I think, would be nice to get an OS X port of this!
> Did they ever release the source code to Dumpster?
>
> On Friday, December 20, 2002, at 10:55 AM, Ryan Henderson wrote:
>
>> On 20/12/02 3:50 AM, "ryan francesconi" <email@hidden> wrote:
>>
>>> i haven't noticed this in my code and files. data of that size
>>> doesn't fit
>>> in a resource fork. my only guess is that you are recording stereo
>>> and are
>>> expecting mono data. or you are recording at 44.1 and are expecting
>>> 22050,
>>> etc..
>>> but you're no dummy so i'm sure you thought of that already. then
>>> again it
>>> maybe a bug.
>>
>>
>> Yeah I have checked all those things. See the problem is QT reports
>> the file
>> size for that track to be the correct size, when you export that single
>> track it is the right size, but the file system reports the file to be
>> double the tracks size. There is only one track in the movie. And it
>> does
>> not happen on windows !
>>
>> See this image:
>>
>> http://ryan.bur.st/sizediff.gif
>>
>>>
>>> try compressing your audio with the exporter. i generally record to
>>> file
>>> then immediate compress or export the result. that may solve your
>>> problem.
>>> that might be why i haven't noticed. also, i haven't messed with this
>>> stuff
>>> since last spring.
>>>
>>
>>
>> Yeah our files get compressed by our custom compressors using cleaner
>> on
>> different machines. There obviously is the post recording / pre -
>> compression workaround, but I would prefer not to use a workaround.
>>
>>
>>> rf
>>>
>>>
>>>
>>>
>>>
>>> ----- Original Message -----
>>> From: "Ryan Henderson" <email@hidden>
>>> To: "Steve Franks" <email@hidden>;
>>> <email@hidden>
>>> Sent: Wednesday, December 18, 2002 10:58 PM
>>> Subject: Re: Audio Capture - File Sizes Double
>>>
>>>
>>>> On 19/12/02 1:43 PM, "Steve Franks" <email@hidden> wrote:
>>>>
>>>>> Hmmm, dont have any direct experience about this, but I just wonder
>>>>> if
>>>>> its duplicating the
>>>>> data in the resource fork since its so close to double.
>>>>>
>>>> I have no idea myself (No experience with JDirect either). The
>>>> problem we
>>>> have is that our recordings are now 500mb instead of 250mb and we
>>>> FTP each
>>>> file at least once over the network. So you can imagine that makes
>>>> quite a
>>>> bit of extra network traffic. The thing is this happens using QT's
>>> supplied
>>>> sample code. It's not like I am doing anything special..
>>>>
>>>> Thanks for the idea anyway.
>>>>
>>>>> On Thursday, December 19, 2002, at 01:00 PM, Ryan Henderson wrote:
>>>>>
>>>>>> I have done few tests and this still seems to be a problem.
>>>>>>
>>>>>> Basically audio files captured using QTJava (maybe just a QuickTime
>>>>>> thing
>>>>>> not so sure yet) are double the audio tracks size. So if you record
>>>>>> say 5
>>>>>> seconds @ 80k per second the file size should be 400k but the file
>>>>>> consumes
>>>>>> 800k!
>>>>>>
>>>>>>
>>>>>> See :
>>>>>>
>>>>>> http://ryan.bur.st/sizediff.gif
>>>>>>
>>>>>> as an example screenshot of the output differences.
>>>>>>
>>>>>>
>>>>>> If you export the movie it is still the same size, however if you
>>>>>> just
>>>>>> export the track and then save the movie it comes out at the proper
>>>>>> size.
>>>>>>
>>>>>> Can anybody out there capturing audio please confirm this happens
>>>>>> to
>>>>>> them as
>>>>>> well.
>>>>>>
>>>>>>
>>>>>> Cheers
>>>>>> Ryan
>>>>>> _______________________________________________
>>>>>> quicktime-java mailing list | email@hidden
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>>>>>>
>>>>>
>>>>
>>>> Ryan Henderson
>>>> Programmer
>>>> Multimedia Centre
>>>> University of Western Australia
>>>>
>>>> "Not everything that can be counted counts, and not everything that
>>>> counts
>>>> can be counted." - Albert Einstein (1879-1955)
>>>> _______________________________________________
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>>
>> Ryan Henderson
>> Programmer
>> Multimedia Centre
>> University of Western Australia
>>
>> "Not everything that can be counted counts, and not everything that
>> counts
>> can be counted." - Albert Einstein (1879-1955)
>> _______________________________________________
>> quicktime-java mailing list | email@hidden
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References: 
 >Re: Audio Capture - File Sizes Double (From: Steve Franks <email@hidden>)



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