Mac recognises installer (binary file) as picture - can it be changed?

My friend sent me an installer for an app via email (surprised it came through at all at 21mb). When i download it i get a dialog in firefox saying it is a binary file do i want to save it. Then I go to open it in the finder and i get the warning that it is an application downloaded from the interenet + am i sure I want to download it. When I try to open it (clicking on it) photoshop attempts to run it but fails, with a dialog saying it doesn't recognize the file type. When I do a apple I on the file its says it is plain text. Is there a way i can change it so it will run as supposed to - if i have to get the file again it will be very inonvenient. many thanks in advance.

If your friend is compressing the file before sending it to you... you can either have him not compress it, or you need to be sure that you have/use the correct decompression utility.
Try contacting your friend and ask him what the correct extension for the file is. When you know for sure... Then ensure that the correct one is on the file you downloaded. If it is not change it. The mac will remind you that if you don't put the correct extension on the file it will not work properly... say OK. Now try to open it.

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Hello,
I have an application where I will acquire data from several sensors. For most of them (16) a relatively low sampling rate (10000Hz) will be fine, but, for one AE sensor I need a high sampling rate (50k - 100kHz). So, I've decided to store the data in binary format so as no to have way too big files.
I try writing the files with the express module, and afterwards, in a new .vi, reading and graphing it to check it, but signals don't match.
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Hello,
I have tried my best cleaning up the wiring, but it's still pretty messy. I attach the complete program.
My problem (still not solved) is that since EA needs to be measured at very high rate, I want to write it as binary data. But I cannot make it show me the correct data afterwards, with a different program, that doesn't matter.
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Regards,
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Attachments:
program_00.vi ‏297 KB

Binary files

Hi,
I have a set of binary files (. bin .raw .dat) that contain samples of ECG signals togheter with other
information. I would like to read the samples and other fields of binary files. so
Can i selectively choose one or more fields od binary file?
I have attached a very small .dat file, instead .bin and .raw files are too big.
In my application i use much larger files.
Any suggestions on how to do it?
Sorry but I'm not very familiar with binary files.
Thanks in advance
I have a set of binary files (. bin .raw .dat) that contain samples of ECG signals togheter other information. I would like to read the samples and other fields of binary files. so Can i selectively choose one or more fields od binary file?
I can't attach a .dat .bin or .raw file because forum don't accept these file format.
Any suggestions on how to do it?
I haven't familiarity with binary files.
Thanks in advance
Wasabi

ok! I have a bit of code that explains the file format.
it is something like this:
#define NUM_CH_IN_SAMPLE 8
struct ChSample
long _sample_data[NUM_CH_IN_SAMPLE]; /* 500 Hz, 2.5 uV/LSB */
DWORD _status;
ChSample() : _status(0) {};
so I would like to read items of structure.
Any suggestions?
Thanks

How to read binary file in Matlab

"Hello all!
Labview 7.0 has an example "Cont Acq to File (binary).vi" log the PCI 6014 card and writes the data to a binary file. How can I read that
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Hello,
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When it comes to binary files ...

I can't say I have a good grasp of the real differences between files written in text mode and files written in binary mode.
For (C) example:
struct data
int a, b;
} d;
d.a = 432;
d.b = 581924;
char s[14] = "hello world!\n";
FILE *fd = fopen("test.txt", "wt");
fwrite(&d, sizeof(data), 1, fd);
fwrite(s, sizeof(char), 14, fd);
fclose(fd);
fd = fopen ("test.bin", "wb");
fwrite(&d, sizeof(data), 1, fd);
fwrite(s, sizeof(char), 14, fd);
fclose(fd);
test.txt hexdump:
B0 01 00 00 24 E1 08 00 68 65 6C 6C 6F 20 77 6F 72 6C 64 21 0D 0A 00
test.bin hexdump:
B0 01 00 00 24 E1 08 00 68 65 6C 6C 6F 20 77 6F 72 6C 64 21 0A 00
What I know (and see):
strings containing '\n', when are written in text mode to a file, have the '\n' replaced by CR+LF / LF / CR depending on the platform; in binary mode it is left unchanged
binary files are used to represent the image of the memory used by a program; so if a chain of structures are wrritten in a known order in a binary file, that chain can be restored on the next startup of the program, if the reading takes place in the order specified so no parsing and type casting is needed
Am I right? Other than these things what else should I know?
The reason I want to clear these things out is because I have a file which contains the data collected and interpreted by a counter device from some sensors.
I believe this file is the binary footprint of the memory used to hold the recordings because I can't decipher the hexdump.
Now, I have a program to read this type of file and see the recordings and export them to a file in a human readable format (and no, it doesn't have a command line argument for this so that I can make a script). The thing is, I want to put all the recordings in a database and manipulate them further for all kinds of statistics and I don't want to waste time exporting whenever there is a data to be inserted.
I have no clue if what I'm saying has a bit of truth so I would be grateful if someone can correct or enlighten me on how I should approach this ... is there a way to "parse" the binary file directly not knowing the types of the placeholders for the recordings?
Last edited by knob (2011-03-03 22:41:04)

You're right about what happens when a "text" file is written to disk. However, files ("text" or "binary") can contain anything, not necessarily a "memory footprint". (Edit: well, technically, anything you write to disk comes from memory... but it doesn't have to come from a struct or an array. It doesn't matter anyway...)
That said, as far as I understand it, your problem is that your "counter device" uses an undocumented file format and closed-source software. First step would be to ask the developer for documentation and source code.
If the developer doesn't want to give the required information or update the software as needed, you'll have to reverse-engineer the file format, either as previously suggested by "guessing" the contents, or by decompiling the executables that access the files.
Last edited by stqn (2011-03-04 17:36:59)

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Can I get a list of all binary files and what they do?

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I would be grateful if you someone could explain how to handle such binary file stream with LabView and send an example to i
llustrate it.
Many thanks in advance for your help.
Donat-Pierre
Attachments:
Demo.acq ‏248 KB
SCR_EKG_test1b.acq ‏97 KB

The reading of double is also straight forward : just use a dble float wired to the type cast node, after inverting the string (indian conversion).
See the attached example.
The measure of skin thickness is based on OCT (optical coherent tomography = interferometry) : an optical fiber system send and received light emitted to/back from the skin at a few centimeter distance. A profile of skin structure is then computed from the optical signal.
CC
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
Attachments:
Read_AK_time_info.vi.zip ‏9 KB

How can I read a binary file stream with many data type, as with AcqKnowledge physio binary data file?

I would like to read in and write physiological data which was saved by Biopac�s AcqKnowledge 3.8.1 software, in conjunction with their MP150 acquisition system. To start with, I�d like to write a converter from different physiodata file format into the AcqKnowledge binary file format for version 3.5 � 3.7 (including 3.7.3). It will allow us to read different file format into an analysis package which can only read in file written by AcqKnowledge version 3.5 � 3.7 (including 3.7.3).
I attempted to write a reader following the Application Note AS156 entitled �AcqKnowledge File Format for PC with Windows� (see http://biopac.com/AppNotes/app156FileFormat/FileFormat.h
tm ). Note the link for the Mac File format is very instructive too - it is presented in a different style and might make sense to some people with C library like look (http://biopac.com/AppNotes/app155macffmt/macff.htm) .
I guess the problem I had was that I could not manage to read all the different byte data stream with File.vi. This is easy in C but I did not get very far in LabView 7.0. Also, because it is for PC I am assuming the data to be written as �little endian� integer, and thus I also used byte swap vi.
I would be grateful if you someone could explain how to handle such binary file stream with LabView and send an example to illustrate it.
Many thanks in advance for your help.
Donat-Pierre

One more step...
short are U16 integer
double are double precision float
bool seem to be 2 bytes (= U16)
char are string (variable length)
rgb are U16 integer, with high order byte = 0
rect should be 4 x U16 (top, left, bottom, right)
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...

Mac recognises installer (binary file) as picture - can it be changed?

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