Difference between revisions of "ReNamer:Rules:Extension"
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== Extension Rule == | == Extension Rule == | ||
<center>[[Image:ExtensionsRule.png]]</center> | <center>[[Image:ExtensionsRule.png]]</center> | ||
| − | This rule allows you to attach a new extension. It is useful when the extension of a file is missing (or if the file has a wrong extension). There is an option to find the correct extension based on the file's structure | + | This rule allows you to attach a new extension. It is useful when the extension of a file is missing (or if the file has a wrong extension). There is an option to find the correct extension based on the file's structure. |
The parameters are as follows: | The parameters are as follows: | ||
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|- | |- | ||
| New extension | | New extension | ||
| − | | | + | | New extention that has to be added to the filename. |
| − | |||
|- | |- | ||
| Append to the original filename | | Append to the original filename | ||
| − | | If this option is | + | | If this option is selected, the new extension will be placed after the old extension. |
| − | If | + | If it is deselected (default option) the new extention will replace the old one. |
|- | |- | ||
| Detect using binary signature | | Detect using binary signature | ||
| − | | Sometimes the extension of a file is missing. At other times it is wrong (e.g. some downloaded files get the '''aspx '''extension, although they may ''actually'' be '''zip '''or '''pdf'''.) | + | | Sometimes the extension of a file is missing. At other times it is wrong (e.g. some downloaded files get the '''aspx '''extension, although they may ''actually'' be '''zip '''or '''pdf''' files.) |
One way to identify the file extension is by trial-and-error: Attach different extensions and try to open the file with its associated application. This is very tedious. | One way to identify the file extension is by trial-and-error: Attach different extensions and try to open the file with its associated application. This is very tedious. | ||
| − | A far more efficient way is to compare the file's ''digital signature ''with the signatures of known file types and identify the file's type. This is done internally within ReNamer, so you do not have to know what a "digital signature" means, or the actual value of the signature for the given file. | + | A far more efficient way is to compare the file's ''digital signature'' with the signatures of known file types and identify the file's type. This is done internally within ReNamer, so you do not have to know what a "digital signature" means, or the actual value of the signature for the given file. |
Note that different extensions do not have unique signatures. So sometimes the file's signature may match the signature of several different extensions. In such cases, ReNamer shows the New filename with all matching extensions. For example, "fileName.flv|wmv|pdf". ReNamer also pops up an error window (because the combined extension is invalid). Just read the suggested extensions and then try them out one by one. This method is still better compared to making wild guesses, because ReNamer suggests only 2-3 extensions. | Note that different extensions do not have unique signatures. So sometimes the file's signature may match the signature of several different extensions. In such cases, ReNamer shows the New filename with all matching extensions. For example, "fileName.flv|wmv|pdf". ReNamer also pops up an error window (because the combined extension is invalid). Just read the suggested extensions and then try them out one by one. This method is still better compared to making wild guesses, because ReNamer suggests only 2-3 extensions. | ||
Revision as of 12:36, 26 August 2009
Extension Rule
This rule allows you to attach a new extension. It is useful when the extension of a file is missing (or if the file has a wrong extension). There is an option to find the correct extension based on the file's structure.
The parameters are as follows:
| Parameter | Details |
|---|---|
| New extension | New extention that has to be added to the filename. |
| Append to the original filename | If this option is selected, the new extension will be placed after the old extension.
If it is deselected (default option) the new extention will replace the old one. |
| Detect using binary signature | Sometimes the extension of a file is missing. At other times it is wrong (e.g. some downloaded files get the aspx extension, although they may actually be zip or pdf files.)
One way to identify the file extension is by trial-and-error: Attach different extensions and try to open the file with its associated application. This is very tedious. A far more efficient way is to compare the file's digital signature with the signatures of known file types and identify the file's type. This is done internally within ReNamer, so you do not have to know what a "digital signature" means, or the actual value of the signature for the given file. Note that different extensions do not have unique signatures. So sometimes the file's signature may match the signature of several different extensions. In such cases, ReNamer shows the New filename with all matching extensions. For example, "fileName.flv|wmv|pdf". ReNamer also pops up an error window (because the combined extension is invalid). Just read the suggested extensions and then try them out one by one. This method is still better compared to making wild guesses, because ReNamer suggests only 2-3 extensions. For more accurate results, use ReNamer with TrID, a specialized utility for identifying the file's real extension. Be aware that even TrID often suggests multiple extensions, and you still have to try them out. |