MusicBrainz Picard/Documentation/Scripting: Difference between revisions
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#REDIRECT [[MusicBrainz Picard]] |
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==Syntax== |
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The syntax is derived from [http://wiki.hydrogenaudio.org/index.php?title=Foobar2000:Titleformat_Reference Foobar2000's titleformat]. There are three base elements: '''text''', '''variable''' and '''function'''. Variables consist of alpha-numeric characters enclosed in percent signs (e.g. <code><nowiki>%artist%</nowiki></code>). Functions start with a dollar sign and end with an argument list enclosed in parentheses (e.g. <code><nowiki>$lower(...)</nowiki></code>). |
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To use parenthesis or commas as-is inside a function call you must escape them with a backslash. |
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==Metadata Variables== |
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See [[Picard Tags|Picard tags]] for list of usable variables. |
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==Technical Variables== |
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===%_extension%=== |
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* Extension of the file name. For example ''mp3'' for file ''01 Track.mp3''. |
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==Functions== |
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===$if(if,then,else)=== |
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* If <code><nowiki>if</nowiki></code> is not empty, it returns <code><nowiki>then</nowiki></code>, otherwise it returns <code><nowiki>else</nowiki></code>. |
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===$if2(a1,a2,a3,...)=== |
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* Returns first non empty argument. |
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===$lower(text)=== |
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* Returns <code><nowiki>text</nowiki></code> in lower case. |
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===$upper(text)=== |
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* Returns <code><nowiki>text</nowiki></code> in upper case. |
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===$left(text,num)=== |
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* Returns first <code><nowiki>num</nowiki></code> characters from <code><nowiki>text</nowiki></code>. |
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===$matchedtracks()=== |
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''Added in version 0.12'' |
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* Returns the number of matched tracks within a release. |
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===$right(text,num)=== |
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* Returns last <code><nowiki>num</nowiki></code> characters from <code><nowiki>text</nowiki></code>. |
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===$num(num,len)=== |
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* Returns <code><nowiki>num</nowiki></code> formatted to <code><nowiki>len</nowiki></code> digits. |
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===$replace(text,search,replace)=== |
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* Replaces occurrences of <code><nowiki>search</nowiki></code> in <code><nowiki>text</nowiki></code> with value of <code><nowiki>replace</nowiki></code> and returns the resulting string. |
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===$rsearch(text,pattern)=== |
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* [http://docs.python.org/lib/re-syntax.html Regular expression] search. This function will return the first matching group. |
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===$rreplace(text,pattern,replace)=== |
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* [http://docs.python.org/lib/re-syntax.html Regular expression] replace. |
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===$in(x,y)=== |
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* Returns true, if <code><nowiki>x</nowiki></code> contains <code><nowiki>y</nowiki></code>. |
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===$unset(name)=== |
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* Unsets the variable <code><nowiki>name</nowiki></code>. |
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===$set(name, value)=== |
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* Sets the variable <code><nowiki>name</nowiki></code> to <code><nowiki>value</nowiki></code>. |
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Note: To create a variable which can be used for the file naming string, but which will not be written as a tag in the file, prefix the variable name with an underscore. %something% will create a "something" tag; %_something% will not. |
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===$get(name)=== |
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* Returns the variable <code><nowiki>name</nowiki></code> (equivalent to <code><nowiki>%name%</nowiki></code>). |
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===$copy(new,old)=== |
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* Copies metadata from variable <code><nowiki>old</nowiki></code> to <code><nowiki>new</nowiki></code>. The difference between <code><nowiki>$set(new,%old%)</nowiki></code> is that <code><nowiki>$copy(new,old)</nowiki></code> copies multi-value variables without flattening them. |
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===$trim(text[,char])=== |
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* Trims all leading and trailing whitespaces from <code><nowiki>text</nowiki></code>. The optional second parameter specifies the character to trim. |
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===$add(x,y)=== |
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* Add <code><nowiki>y</nowiki></code> to <code><nowiki>x</nowiki></code>. |
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===$sub(x,y)=== |
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* Subtracts <code><nowiki>y</nowiki></code> from <code><nowiki>x</nowiki></code>. |
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===$div(x,y)=== |
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* Divides <code><nowiki>x</nowiki></code> by <code><nowiki>y</nowiki></code>. |
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===$mod(x,y)=== |
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* Returns the remainder of <code><nowiki>x</nowiki></code> divided by <code><nowiki>y</nowiki></code>. |
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===$mul(x,y)=== |
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* Multiplies <code><nowiki>x</nowiki></code> by <code><nowiki>y</nowiki></code>. |
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===$or(x,y)=== |
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* Returns true, if either <code><nowiki>x</nowiki></code> or <code><nowiki>y</nowiki></code> not empty. |
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===$and(x,y)=== |
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* Returns true, if both <code><nowiki>x</nowiki></code> and <code><nowiki>y</nowiki></code> are not empty. |
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===$not(x)=== |
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* Returns true, if <code><nowiki>x</nowiki></code> is empty. |
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===$eq(x,y)=== |
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* Returns true, if <code><nowiki>x</nowiki></code> equals <code><nowiki>y</nowiki></code>. |
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===$ne(x,y)=== |
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* Returns true, if <code><nowiki>x</nowiki></code> not equals <code><nowiki>y</nowiki></code>. |
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===$lt(x,y)=== |
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* Returns true, if <code><nowiki>x</nowiki></code> is lower than <code><nowiki>y</nowiki></code>. |
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===$lte(x,y)=== |
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* Returns true, if <code><nowiki>x</nowiki></code> is lower than or equals <code><nowiki>y</nowiki></code>. |
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===$gt(x,y)=== |
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* Returns true, if <code><nowiki>x</nowiki></code> is greater than <code><nowiki>y</nowiki></code>. |
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===$gte(x,y)=== |
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* Returns true, if <code><nowiki>x</nowiki></code> is greater than or equals <code><nowiki>y</nowiki></code>. |
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===$noop(...)=== |
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* Does nothing (useful for comments or disabling a block of code). |
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===$len(text)=== |
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* Returns the number of characters in text. |
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===$performer(pattern="",join=", ")=== |
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* Returns the performers where the performance type (e.g. "vocal") matches <code>pattern</code>, joined by <code>join</code>. |
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===$firstalphachar(text,nonalpha="#")=== |
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* Returns the first character of <code>text</code>. If <code>text</code> is not an alphabetic character <code>nonalpha</code> is returned instead. |
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===$initials(text)=== |
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* Returns the first character of each word in <code>text</code>, if it is an alphabetic character. |
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===$truncate(text,length)=== |
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* Truncate <code>text</code> to <code>length</code>. |
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==Tagger Script Examples== |
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'''''Options'' → ''Options...'' → ''Advanced'' → ''Scripting''''' |
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Tagger Script usually creates, modifies or deletes metadata variables. |
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===Artist names=== |
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<pre>$if($search(%album%,(feat. conductor)), |
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$set(artist,%orchestra%)) |
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</pre> |
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* ''Stupid assumption that all classical albums have "feat. conductor" in the title, but it shows the idea. :)'' |
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=== Live tracks on live albums=== |
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<pre>$if($and($eq(%releasetype%,live),$not($in(%title%,\(live\)))),$set(title,%title% \(live\))) |
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</pre> |
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===Remove "feat." from track titles=== |
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<pre>$set(title,$rreplace(%title%,\\s\\\(feat. [^\)]+\\\),)) |
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</pre> |
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===Convert triple-dot to ellipsis=== |
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<pre>$set(title,$replace(%title%,...,…)) |
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$set(album,$replace(%album%,...,…)) |
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</pre> |
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This one is useful for people concerned about correct typography and also fixes one problem on Linux: if an album (assuming it's also a directory) is called something like "...for you!", it is considered hidden and therefore might be not accessible from some applications. |
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==File Naming Examples== |
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'''''Options'' → ''Options...'' → ''File naming''''' |
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===Lower case filenames with underscores=== |
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<pre>$lower($replace(%albumartist%/%album%/$num(%tracknumber%,2) %title%, ,_)) |
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</pre> |
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===(Year) only if available=== |
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<pre>$if(%date%,\($left(%date%,4)\)) |
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</pre> |
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===Use a different naming pattern for NATs=== |
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<pre>$if($eq([non-album tracks],%album%),[non-album tracks]/%tracknumber%. %artist% - ,%artist% - $if(%date%, $left(%date%,4) )- %album%/%tracknumber%.)%title% |
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</pre> |
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Result: |
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* Non-Album Tracks: [non-album tracks]/Band Name - Track Name.ext |
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* Tracks in releases: Band Name - year - Release Name/##. Track Name.ext |
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===Remove "Various Artists" on compilations=== |
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By default, Picard marks various-artist compilations with an album artist called "Various Artists". Even if you don't have anything by [http://musicbrainz.org/artist/4e46dd54-81a6-4a75-a666-d0e447861e3f.html Torsten Pröfrock], it still means that you player will sort your comps between Vangelis and VCR instead of down at the end, which you may not want. |
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This is easy to fix: |
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<pre>$if($and($eq(%compilation%,1), $eq(%albumartist%,Various Artists)), $unset(albumartist) $unset(albumartistsort))</pre> |
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[[Category:MusicBrainz Picard]] [[Category:How To]] |
Latest revision as of 21:16, 25 November 2014
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