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#1
Posted to rec.audio.pro
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bext chunk
Dear group,
I'm writing my pre-diploma and I like to have a chart for the bext chunk like on this page http://ccrma.stanford.edu/CCRMA/Cour...ts/WaveFormat/ I know that the bext chunk has a size of 752 bytes but i've failed to break it down into the different fields. Is it right if I say the description field has a size of 256 bytes? I would realy appreciate any of your help. Thanx Johannes |
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#2
Posted to rec.audio.pro
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bext chunk
jojohamps wrote:
I know that the bext chunk has a size of 752 bytes but i've failed to break it down into the different fields. I'm not sure if this will help, but you can check out http://www.cartchunk.com/applicat.htm It's a Windows application that lets you examine the bext chunk (as well as others). If you have some sample files, you can see just what's in them. -- If you e-mail me and it bounces, use your secret decoder ring and reach me he double-m-eleven-double-zero at yahoo -- I'm really Mike Rivers ) |
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#3
Posted to rec.audio.pro
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bext chunk
On Dec 28, 2:26*am, Mike Rivers wrote:
jojohamps wrote: I know that the bext chunk has a size of 752 bytes but i've failed to break it down into the different fields. I'm not sure if this will help, but you can check outhttp://www.cartchunk..com/applicat.htm It's a Windows application that lets you examine the bext chunk (as well as others). If you have some sample files, you can see just what's in them. -- If you e-mail me and it bounces, use your secret decoder ring and reach me he double-m-eleven-double-zero at yahoo -- I'm really Mike Rivers ) Thank you, but I need a description like that form byte 0-3 is the chunkID from byte 4-7 chunk size and 8-304 there is the description field and so on.....i couldn't find such things in the web. |
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#4
Posted to rec.audio.pro
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bext chunk
On Sun, 28 Dec 2008 02:07:55 -0800 (PST), in 'rec.audio.pro',
in article bext chunk, jojohamps wrote: On Dec 28, 2:26*am, Mike Rivers wrote: jojohamps wrote: I know that the bext chunk has a size of 752 bytes but i've failed to break it down into the different fields. I'm not sure if this will help, but you can check outhttp://www.cartchunk.com/applicat.htm It's a Windows application that lets you examine the bext chunk (as well as others). If you have some sample files, you can see just what's in them. -- If you e-mail me and it bounces, use your secret decoder ring and reach me he double-m-eleven-double-zero at yahoo -- I'm really Mike Rivers ) Thank you, but I need a description like that form byte 0-3 is the chunkID from byte 4-7 chunk size and 8-304 there is the description field and so on.....i couldn't find such things in the web. http://tech.ebu.ch/webdav/site/tech/...h/tech3285.pdf http://tech.ebu.ch/webdav/site/tech/shared/r/r098.pdf http://tech.ebu.ch/webdav/site/tech/shared/r/r085.pdf http://tech.ebu.ch/webdav/site/tech/...h/tech3306.pdf -- Frank, Independent Consultant, New York, NY [Please remove 'nojunkmail.' from address to reply via e-mail.] Read Frank's thoughts on HDV at http://www.humanvalues.net/hdv/ (also covers AVCHD and XDCAM EX). |
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#5
Posted to rec.audio.pro
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bext chunk
On Dec 28, 2:30*pm, Frank wrote:
On Sun, 28 Dec 2008 02:07:55 -0800 (PST), in 'rec.audio.pro', in article bext chunk, jojohamps wrote: On Dec 28, 2:26*am, Mike Rivers wrote: jojohamps wrote: I know that the bext chunk has a size of 752 bytes but i've failed to break it down into the different fields. I'm not sure if this will help, but you can check outhttp://www.cartchunk.com/applicat.htm It's a Windows application that lets you examine the bext chunk (as well as others). If you have some sample files, you can see just what's in them. -- If you e-mail me and it bounces, use your secret decoder ring and reach me he double-m-eleven-double-zero at yahoo -- I'm really Mike Rivers ) Thank you, but I need a description like that form byte 0-3 is the chunkID from byte 4-7 chunk size and 8-304 *there is the description field and so on.....i couldn't find such things in the web. http://tech.ebu.ch/webdav/site/tech/...h/tech3285.pdf http://tech.ebu.ch/webdav/site/tech/shared/r/r098.pdf http://tech.ebu.ch/webdav/site/tech/shared/r/r085.pdf http://tech.ebu.ch/webdav/site/tech/...h/tech3306.pdf -- Frank, Independent Consultant, New York, NY [Please remove 'nojunkmail.' from address to reply via e-mail.] Read Frank's thoughts on HDV athttp://www.humanvalues.net/hdv/ (also covers AVCHD and XDCAM EX). Hi Frank, thanks for your response, but i have already gone through these documents. I wanted to create a list in such a schema, like below (unfortunately it is in german and in a bad structure....) RIFF Chunk (Länge 12 Bytes) Byte Number Bemerkung Kodierung Bezeichnung 0 – 3 „RIFF“ ausgeschrieben (ASCII) Chunk ID 4 – 7 Gesamtlänge der Datei inkl. den Subchunks (uInt32) Chunk Size 8 – 11 „WAVE“ ausgeschrieben (ASCII) RIFF Type FORMAT Subchunk (Länge 24 Bytes) Byte Number Bemerkung Kodierung Bezeichnung 0 – 3 „fmt_“ ausgeschrieben (mit Unterstrich) (ASCII) Subchunk 1 ID 4 – 7 Länge des FORMAT Chunks (uInt32, 0x10) Suchunk 1 Size 8 – 9 Audioformat, komprimiert oder unkomprimiert (uInt16) Audio Format 10 – 11 Anzahl der Kanäle, Mono oder Stereo (uInt16) Num Channels 12 – 15 Sample Rate in Hz (uInt32) Sample Rate 16 – 19 Bytes pro Sekunde, Datenübertragungsbandbreite (uInt32) Byte Rate 20 – 21 Anzahl der Bytes die für ein Sample gebraucht werden (uInt16) Block Align 22 - 23 Quantisierungsauflösung (uInt16) Bits per Sample |
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#6
Posted to rec.audio.pro
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bext chunk
On Dec 28, 7:11*pm, jojohamps wrote:
On Dec 28, 2:30*pm, Frank wrote: On Sun, 28 Dec 2008 02:07:55 -0800 (PST), in 'rec.audio.pro', in article bext chunk, jojohamps wrote: On Dec 28, 2:26*am, Mike Rivers wrote: jojohamps wrote: I know that the bext chunk has a size of 752 bytes but i've failed to break it down into the different fields. I'm not sure if this will help, but you can check outhttp://www.cartchunk.com/applicat.htm It's a Windows application that lets you examine the bext chunk (as well as others). If you have some sample files, you can see just what's in them. -- If you e-mail me and it bounces, use your secret decoder ring and reach me he double-m-eleven-double-zero at yahoo -- I'm really Mike Rivers ) Thank you, but I need a description like that form byte 0-3 is the chunkID from byte 4-7 chunk size and 8-304 *there is the description field and so on.....i couldn't find such things in the web. http://tech.ebu.ch/webdav/site/tech/...h/tech3285.pdf http://tech.ebu.ch/webdav/site/tech/shared/r/r098.pdf http://tech.ebu.ch/webdav/site/tech/shared/r/r085.pdf http://tech.ebu.ch/webdav/site/tech/...h/tech3306.pdf -- Frank, Independent Consultant, New York, NY [Please remove 'nojunkmail.' from address to reply via e-mail.] Read Frank's thoughts on HDV athttp://www.humanvalues.net/hdv/ (also covers AVCHD and XDCAM EX). Hi Frank, thanks for your response, but i have already gone through these documents. I wanted to create a list in such a schema, like below (unfortunately it is in german and in a bad structure....) RIFF Chunk (Länge 12 Bytes) Byte Number Bemerkung * * * * * * * * * * * * * * * * * Kodierung * * * Bezeichnung 0 – 3 * * * * * * * * „RIFF“ ausgeschrieben * * * * * * * * * * * * * * * (ASCII) * * * * Chunk ID 4 – 7 * * * * * * * * Gesamtlänge der Datei inkl. den Subchunks * * * * * * *(uInt32) * * * * * * * *Chunk Size 8 – 11 * * * * * * * * „WAVE“ ausgeschrieben * * * * * * * * * * * * * * *(ASCII) * * * * RIFF Type FORMAT Subchunk (Länge 24 Bytes) Byte Number Bemerkung * * * * * * * * * * * * * * * * * Kodierung * * * Bezeichnung 0 – 3 * * * * * * * * „fmt_“ ausgeschrieben (mit Unterstrich) * * * * * * (ASCII) * * * * Subchunk 1 ID 4 – 7 * * * * * * * * Länge des FORMAT Chunks * * * * * * * * * * * * * * * *(uInt32, 0x10) *Suchunk 1 Size 8 – 9 * * * * * * * * Audioformat, komprimiert oder unkomprimiert * * * * * * (uInt16) * * * * * * * *Audio Format 10 – 11 * * * * * * * Anzahl der Kanäle, Mono oder Stereo * * * * * * * * * *(uInt16) * * * * * * * *Num Channels 12 – 15 * * * * * * * Sample Rate in Hz * * * * * * * * * * * * * * * * * * * (uInt32) * * * * * * * *Sample Rate 16 – 19 * * * * * * * Bytes pro Sekunde, Datenübertragungsbandbreite * * * * (uInt32) Byte Rate 20 – 21 * * * * * * * Anzahl der Bytes die für ein Sample gebraucht werden (uInt16) * * * * * * * *Block Align 22 - 23 * * * * * * * * Quantisierungsauflösung * * * * * * * * * * * * * * * *(uInt16) * * * * * * * *Bits per Sample Oh sorry for the mess!! I could solve my structual problme in my work. Thanx. |
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#7
Posted to rec.audio.pro
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bext chunk
On Sat, 27 Dec 2008 16:14:46 -0800 (PST), jojohamps wrote:
Dear group, I'm writing my pre-diploma and I like to have a chart for the bext chunk like on this page http://ccrma.stanford.edu/CCRMA/Cour...ts/WaveFormat/ I know that the bext chunk has a size of 752 bytes but i've failed to break it down into the different fields. You may have a look at http://en.wikipedia.org/wiki/Broadcast_Wave_Format and its subpages. HTH Norbert |
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#8
Posted to rec.audio.pro
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bext chunk
On Sun, 28 Dec 2008 10:11:56 -0800 (PST), jojohamps wrote:
thanks for your response, but i have already gone through these documents. I wanted to create a list in such a schema, like below (unfortunately it is in german and in a bad structure....) There is a better interpretation of the wav header in http://de.wikipedia.org/wiki/RIFF_WAVE Why can't you use it? Norbert |
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#9
Posted to rec.audio.pro
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bext chunk
On 29 Dez., 00:29, Norbert Hahn wrote:
On Sun, 28 Dec 2008 10:11:56 -0800 (PST), jojohamps wrote: thanks for your response, but i have already gone through these documents. I wanted to create a list in such a schema, like below (unfortunately it is in german and in a bad structure....) There is a better interpretation of the wav header inhttp://de.wikipedia.org/wiki/RIFF_WAVE Why can't you use it? Norbert Hi, because i don't really get in an unambiguos way the number of 752 bytes. I'am not a programmer so unable to recalculate it for myself. I'm even not sure whether 752 bytes is the correct size or not. But my problems dissolve in a way, because i haven't much time to finish this work due to an horrible deadline.... Johannes |
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#10
Posted to rec.audio.pro
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bext chunk
On 30 Dez., 01:49, jojohamps wrote:
On 29 Dez., 00:29, Norbert Hahn wrote: On Sun, 28 Dec 2008 10:11:56 -0800 (PST), jojohamps wrote: thanks for your response, but i have already gone through these documents. I wanted to create a list in such a schema, like below (unfortunately it is in german and in a bad structure....) There is a better interpretation of the wav header inhttp://de.wikipedia.org/wiki/RIFF_WAVE Why can't you use it? Norbert Hi, because i don't really get in an unambiguos way the number of 752 bytes. I'am not a programmer so unable to recalculate it for myself. I'm even not sure whether 752 bytes is the correct size or not. But my problems dissolve in a way, because i haven't much time to finish this work due to an horrible deadline.... Johannes But Norbert I know these sites... |
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#11
Posted to rec.audio.pro
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bext chunk
On Mon, 29 Dec 2008 16:49:26 -0800 (PST), jojohamps wrote:
On 29 Dez., 00:29, Norbert Hahn wrote: On Sun, 28 Dec 2008 10:11:56 -0800 (PST), jojohamps wrote: thanks for your response, but i have already gone through these documents. I wanted to create a list in such a schema, like below (unfortunately it is in german and in a bad structure....) There is a better interpretation of the wav header inhttp://de.wikipedia.org/wiki/RIFF_WAVE Why can't you use it? Norbert Hi, because i don't really get in an unambiguos way the number of 752 bytes. I'am not a programmer so unable to recalculate it for myself. I'm even not sure whether 752 bytes is the correct size or not. There is no fixed size for any chunk in a wav file except for the format chunk. Where do you find 752 bytes? Norbert |
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