reading file data

[map200uk]

hi!

 

yet more problems and questions-i am trying to read ogg metadata

 

by opening the file and looking for the tag data, i can manage to echo out the vorbis header, but the commend fields wont echo out, i get random characters-buti can see the data in the file (with a hex editor)

 

 

whe i try and read the data for album name

 

using fread($file,x) ;

 

and echo it out, its not equal to the album name?

 

anyone have any suggestions!

 

thanks

[phast1]

Hello,

 

If you are on Windows, then make sure you added a 'b' parameter to your fopen().. Example:

 

$handle = fopen($filename, "rb");

 

Hope that helps!

 

Shawn

 

[map200uk]

cheers bud, sadly nope

 

'rbis)BCV����1L(Ä€ÐU���� ˜6'

 

is the outpu from]

 

i thought perhaps an encoding issue?!

<?php

$fp=fopen("07-maroon_5-cant_stop.ogg","rb");

fseek($fp,150); 

 

 

$test=fread($fp,30);

echo $test;

?>

 

[phast1]

Hmm, I don't think it's an encoding issue, it looks more like a file pointer issue because your output seems to be coming from the 104 line of your hex output instead of the 82 line that you are trying to read.. What happens if you don't do a fseek? Does it seem to start from the beginning of the file? If so, then you might just need to adjust the fseek.. I'm not too familiar with reading binary files, so maybe someone else will have some suggestions if that doesn't help..

 

[map200uk]

Makes no difference mate:(

[map200uk]

thing is if i do echo file_get_contents(file.ogg)

 

i see the data i am trying to extract?!which must mean it can be echoed out?

 

 

OggS���������Ý¢����!)‚evorbis����D¬������q�����¸OggS����������Ý¢���® ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿvorbis���Xiph.Org libVorbis I 20020717������Album=avvvv���Artist=avril���Comment=aaa���Genre=Alt. Rock���Title=girlfriend ���Tracknumber=2 ���Date=2808vorbis)BCV����1L(Ä€ÐU����

[phast1]

Very strange that file_get_contents() shows the correct data but fread() doesn't.. I would just use whatever works, maybe something like this:

 

$data = file_get_contents(file.ogg);

$album = substr($data, 150, 30);

echo $album;

 

That should accomplish the same thing that you were trying to do with fread()?

 

[map200uk]

yep made no sense to me mate

 

phast1,

 

the thing is it seems that with the file it varies i.e say album was a max of 32 bytes it could only be 2 and is seperated by

 

 

ascii code 11

so i.e. Name 0 0 11 Album

 

obviously the 0 are NULL and the 11 is well i think  | ? woukld the best way to do this to be to read say 100 bytes of the file in, then look for this seperator and each time split it based on this?

 

thanks

[phast1]

Yeah, if the length varies, which it definitely would being an album name, you should read in as many characters as you think the max could be, and then parse out based on a separater.. It sounds like you found the separater, so that should work out good.

 

Best of luck!

 

[map200uk]

i think i have but not sure

 

what is ascii ii i thought its a tab, php echoes it as [] chr(11) but when i look at the file contents the byte where its ascii 11 = | ?

 

perhaps tab is represented as | inside a file?

 

thanks

 

[phast1]

It looks like ASCII 11 is a vertical tab according to http://www.asciitable.com/ .. And yeah, your editor is most likely using the pipe symbol (|) just to represent the vertical tab.. I wouldn't worry too much about the character being represented though, just do the test for ASCII char 11, such as:

 

if ($var == chr(11))