[PD] Fwd: file format for GEM

[Stephan Elliot Perez]

---------- Forwarded message ----------
From: Stephan Elliot Perez <dreamoftheshoreofanotherworld at gmail.com>
Date: Mon, Feb 4, 2013 at 10:28 PM
Subject: Re: [PD] file format for GEM
To: J Oliver <jaime.oliver2 at gmail.com>


I have divided things into clips I want to use in GEM. So for now, I am
putting laggy clips aside. If I have this problem with one that I find
indispensable (I have some redundant material), I will probably try another
codec.

But with photo-jpeg, some of the files were getting to be over 20 GB. D=


On Mon, Feb 4, 2013 at 10:26 PM, J Oliver <jaime.oliver2 at gmail.com> wrote:

> As I said, the Apple Intermediary Codec works. However, at some random
> points in the videos (and only in a few files), the playback becomes very
> laggy. This applies in any Player, not just GEM.
>
>
> I've had this problem. How do you deal with audio sync in these cases?
>
> J
>
>
> On Mon, Feb 4, 2013 at 9:28 PM, chris clepper <cgclepper at gmail.com> wrote:
>
>> The M is for 'Motion' and uses two fields per frame, so it is interlaced.
>>
>>
>> On Mon, Feb 4, 2013 at 3:18 PM, me.grimm <megrimm at gmail.com> wrote:
>>
>>> >> Also, I selected JPEG-Photo using the program "MPEGStreamclip" at %100
>>>
>>> this actually worked pretty decent. thanks for the tip!
>>>
>>> > I assume JPEG-Photo is MJPEG: The video file gets so large, because you
>>>
>>> might someone know: what is the difference between photo-jpeg and
>>> motion-jpeg? i am assuming from reading around the web that they are
>>> the same thing... but maybe not?
>>>
>>>
>>> m
>>>
>>>
>>>
>>> On Sun, Feb 3, 2013 at 4:09 PM, Thomas Mayer <thomas at residuum.org>
>>> wrote:
>>> > Hi,
>>> >
>>> > please respond to the list, as others may help in answering your
>>> > follow-up questions, and / or may benefit from the conversation.0
>>> >
>>> > On 03.02.2013 21:49, Stephan Elliot Perez wrote:
>>> >> Thanks. I have no idea what a bash script is or what to do with it,
>>> but I
>>> >> will read through the thread...
>>> >
>>> > If you use Linux or Mac OS X, bash is usually installed on your system.
>>> > It is a command line interface and can be used for scripting.
>>> > (http://en.wikipedia.org/wiki/Bash_%28Unix_shell%29)
>>> >
>>> > This particular script is nothing fancy, and I have made it mostly to
>>> > remind the parameters for mencoder.
>>> >
>>> >> Also, I selected JPEG-Photo using the program "MPEGStreamclip" at %100
>>> >> quality and it produces quite a large file. With "auto", the CPU goes
>>> over
>>> >> 90, but if I drag up or down on the framerate's number box, it stays
>>> at
>>> >> around 30-40...
>>> >
>>> > I assume JPEG-Photo is MJPEG: The video file gets so large, because you
>>> > store a JPEG for each frame instead of full image for keyframes only
>>> and
>>> > then changes for subsequent frames as do other video codecs (rough
>>> > explanation). [pix_film] can then read each frame as a JPEG and does
>>> not
>>> > need to find the last keyframe and apply the changes to it, so playback
>>> > should be possible with lower CPU usage.
>>> >
>>> > Please tell us some information about your system, i.e. CPU, graphic
>>> > card, operating system etc., maybe someone with a similar setup can
>>> > respond with further advice for optimisation.
>>> >
>>> > Hth,
>>> > Thomas
>>> > --
>>> > "Chaney was aware that anything, however small, can get the eye of the
>>> > media if it's repulsive enough." (Robert Anton Wilson - The Universe
>>> > Next Door)
>>> > http://www.residuum.org/
>>> >
>>> > _______________________________________________
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>>>
>>>
>>> --
>>> ____________________
>>> m.e.grimm | m.f.a | ed.m.
>>> megrimm at gmail.com
>>> _________________________________
>>>
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>>
>>
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