Convert Label text to LRC file

[bigboss97]

You can get multi-byte characters from labels using "GetInfo: Type=Labels Format=JSON" via Python.

Thank you for your time.
This is my current results:
A) ASCII only (all good!)

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C:\tmp>python pipe_test.py
pipe-test.py, running on windows
Write to  "\\.\pipe\ToSrvPipe"
Read from "\\.\pipe\FromSrvPipe"
-- Both pipes exist.  Good.
-- File to write to has been opened
-- File to read from has now been opened too

Send: >>>
GetInfo: Type=Labels Format=JSON
Rcvd: <<<
[
  [ 0,
    [
      [ 1.52091, 2.31039, "hello" ],
      [ 3.47138, 3.47138, "world" ] ] ] ]
BatchCommand finished: OK

B) Unicode
Exported labels:

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1.520907	2.310385	hello
3.471383	3.471383	小苹果

Piped:

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GetInfo: Type=Labels Format=JSON
Rcvd: <<<
[
  [ 0,
    [
      [ 1.52091, 2.31039, "hello" ],
    c:\wxwidgets-3.1.1\include\wx\strvarBatchCommand finished: OK

I know that my Windows/DOS shell doesn't display unicode characters. But it should at least show me some unreadable characters

[steve]

know that my Windows/DOS shell doesn't display unicode characters. But it should at least show me some unreadable characters

The scripts provided by Audacity assume that data is plain ASCII, and will not work with multi-byte Unicode characters. With Python3 you will probably see errors like:

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"UnicodeDecodeError: 'utf-8' codec can't decode bytes in position x-y: invalid continuation byte

You can get multi-byte characters from labels using "GetInfo: Type=Labels Format=JSON" via Python.

I should have said that "I think it should be possible to get ..."
The "GetInfo: Type=Labels" can definitely handle multi-byte Unicode characters
(try it from Audacity's "Extra menu > Scriptables II > Get Info").
I "assume" that Python3 is capable of accessing that data, but you would need to write your own Unicode compatible functions to read and write Unicode data to/from Audacity.

[bigboss97]

(try it from Audacity's "Extra menu > Scriptables II > Get Info").
I "assume" that Python3 is capable of accessing that data, but you would need to write your own Unicode compatible functions to read and write Unicode data to/from Audacity.

It took a while until I found where to activate the Extra-menu
Yes, that works. I can write a Python script to read the JSON output. But how do I pipe that output to my script?

[steve]

But how do I pipe that output to my script?

If you can get Python to read the Unicode labels, then you should be able to the whole thing with Python.

[bigboss97]

With my limited Python skill and Google's help , I tested the UTF-8 read/write:

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import io

encoding = 'utf8'

with io.open('utf-8.txt', 'r', encoding=encoding, newline='\n') as fin:
    text= fin.read()
    print( text)
    
with io.open('utf-8_out.txt', 'w', encoding=encoding, newline='\n') as fout:
    fout.write(text)

then I modified the pipe_test.py:

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FROMFILE = io.open( FROMNAME,'r', encoding='utf8', newline='\n')
*snip*
    while line != '\n':
        result += line
        line = FROMFILE.readline()
        print(" I read line:["+line+"]")
    return result

I guess I can leave TOFILE as it is.
This is my output:

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GetInfo: Type=Labels Format=JSON"
 I read line:[[
]
 I read line:[  [ 0,
]
 I read line:[    [
]
 I read line:[      [ 0, 0, "Hello" ],
]
 I read line:[    c:\wxwidgets-3.1.1\include\wx\strvararg.BatchCommand finished: OK
]
 I read line:[
]
Rcvd: <<<
[
  [ 0,
    [
      [ 0, 0, "Hello" ],
    c:\wxwidgets-3.1.1\include\wx\strvararg.BatchCommand finished: OK
    

Is Audacity writing an UTF-8 pipe?
mod-script-pipe is a DLL. I couldn't look into it.

[steve]

Does it work for you with just a single label:

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3.471383	3.471383	小苹果

[bigboss97]

Does it work for you with just a single label:

No, it shows one path. Basically it shows a path whenever it's unicode. For instance:

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0.359909	0.359909	Hello
2.159456	2.159456	回頭我也
4.040272	4.040272	world
6.315828	6.315828	不要你

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 I read line:[      [ 0.359909, 0.359909, "Hello" ],
]
 I read line:[    c:\wxwidgets-3.1.1\include\wx\st      [ 4.04027, 4.04027, "world" ],
]
 I read line:[    c:\wxwidgets-3.1.1\include\wx\strvarBatchCommand finished: OK
]

My UTF-8 routine failed totally when I tried with German:

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1.253878	1.253878	Lüneburg

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GetInfo: Type=Labels Format=JSON"
 I read line:[[
]
Traceback (most recent call last):
  File "pipe_utf-8.py", line 82, in <module>
    quick_test()
  File "pipe_utf-8.py", line 79, in quick_test
    do_command('GetInfo: Type=Labels Format=JSON"')
  File "pipe_utf-8.py", line 71, in do_command
    response = get_response()
  File "pipe_utf-8.py", line 64, in get_response
    line = FROMFILE.readline()
  File "C:\Users\home\AppData\Local\Programs\Python\Python37\lib\codecs.py", line 322, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xfc in position 42: invalid start byte

[steve]

Which version of Python are you using?

[steve]

On Linux, with Python 3, this will read the return message and print as hex values. You may notice that with two labels containing "小苹果", the printed data is a mix of UTF-8 and non-UTF-8 (UTF-8 and "latin 1" characters perhaps?).

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import os
import sys

PIPE_BASE = '/tmp/audacity_script_pipe.'
WRITE_NAME = PIPE_BASE + 'to.' + str(os.getuid())
READ_NAME = PIPE_BASE + 'from.' + str(os.getuid())
EOL = '\n'

write_pipe = open(WRITE_NAME, 'w')
read_pipe = open(READ_NAME, 'rb')

def send_command(command):
    """Send a single command."""
    print("Send: >>> \n"+command)
    write_pipe.write(command + EOL)
    write_pipe.flush()

def get_response():
    """Return the command response."""
    result = ''
    line = ''
    last = ''
    while (last != b'\n' or line != b'\n'):
        #result += line
        last = line
        line = read_pipe.read(1)
        print(line.hex(), end=' ')


send_command("GetInfo: Type=Labels")
get_response()

[bigboss97]

Which version of Python are you using?

Python 3.7.5 on Windows 10
Audacity 2.3.3