MusicBrainz Picard/Documentation/Scripting

Scripting in Picard

This page describes a simple scripting language implemented in PicardQt.

Syntax

The syntax is derived from Foobar2000's titleformat. There are three base elements: text, variable and function. Variables consist of alpha-numeric characters enclosed in percent signs (e.g. %artist%). Functions start with a dollar sign and end with an argument list enclosed in parentheses (e.g. $lower(...)).

Variables

• TODO: Add all tag names from UnifiedTagging here.

Functions

$if(if,then,else)

• If if is not empty, it returns then, otherwise it returns else.

$if2(a1,a2,a3,...)

• Returns first non empty argument.

$lower(text)

• Returns text in lower case.

$upper(text)

• Returns text in upper case.

$left(text,num)

• Returns first num characters from text.

$right(text,num)

• Returns last num characters from text.

$num(num,len)

• ..

$replace(text,search,replace)

• ..

$rsearch(text,pattern)

• ..

$rreplace(text,pattern,replace)

• ..

$unset(context, name)

• Unsets the variable name.

$set(context, name, value)

• Sets the variable name to value.

$get(name)

• Returns the variable name (equivalent to %name%).

$trim(text[,char])

• Trims all leading and trailing whitespaces from text. The optional second parameter specifies the character to trim.

$add(x,y)

• Add y to x.

$sub(x,y)

• Substracts y from x.

$div(x,y)

• Divides x by y.

$mod(x,y)

• Returns the remainder of x divided by y.

$mul(x,y)

• Multiplies x by y.

$or(x,y)

• Returns true, if either x or y not empty.

$and(x,y)

• Returns true, if both x and y are not empty.

$not(x)

• Returns true, if x is empty.

$eq(x,y)

• Returns true, if x equals y.

$ne(x,y)

• Returns true, if x not equals y.

$lt(x,y)

• Returns true, if x is lower than y.

$lte(x,y)

• Returns true, if x is lower than or equals y.

$gt(x,y)

• Returns true, if x is greater than y.

$gte(x,y)

• Returns true, if x is greater than or equals y.

Examples

Use case 1: Disc numbers

$set(discnumber,$rsearch(%album%,\\\(disc \(\\d+\)\\\)))
$set(album,$rreplace(%album%,\\s\\\(disc \\d+\\\),))

Use case 2: Artist names

$if($search(%album%,(feat. conductor)),
  $set(artist,%orchestra%))

• Stupid assumption that all classical albums have "feat. conductor" in the title, but it shows the idea. :)

Use case 3: Live tracks on live albums

$if($and($eq(%albumstatus%,live),$not($search(%title,(\(live\))))),$set(title,%title% (live)))

Lower case filenames with underscores

$lower($replace(%albumartist%/%album%/$num(%tracknumber%,2) %title, ,_))