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A set of tools (API + script) to read, write and transform captions from/to many formats

Project description

Introduction

This package is a set of tools to transform captions from one format to another. You will find Writer and Reader for each format and a script if you want to use it in command line.

Supported Format:

  • sbv Reader and Writer
  • srt Reader and Writer
  • ttml Reader and Writer
  • transcript Reader and Writer

How to use (API)

You can read the provided unittest to have complete examples:

from captionstransformer.sbv import Reader
from captionstransformer.ttml import Writer
from StringIO import StringIO
test_content = StringIO(u"""
0:00:03.490,0:00:07.430
>> FISHER: All right. So, let's begin.
This session is: Going Social

0:00:07.430,0:00:11.600
with the YouTube APIs. I am
Jeff Fisher,

0:00:11.600,0:00:14.009
and this is Johann Hartmann,
we're presenting today.

0:00:14.009,0:00:15.889
[pause]
""")
reader = Reader(test_content)

captions = reader.read()
len(captions) == 4
first = captions[0]
type(first.text) == unicode
first.text == u">> FISHER: All right. So, let's begin.\nThis session is: Going Social\n"

# next get a writer
filelike = StringIO()
writer = Writer(filelike)
writer.set_captions(captions)
text = writer.captions_to_text()
text.startswith(u"""<tt xml:lang="" xmlns="http://www.w3.org/ns/ttml"><body><div>""")
writer.write()
writer.close()

About Formats

This quite hard to find simple documentation about existing caption format. Here is a set of existing named caption format:

SubViewer (SUB):

00:04:35.03,00:04:38.82
Hello guys... please sit down...

00:05:00.19,00:05:03.47
M. Franklin,[br]are you crazy?

Youtube (SBV):

0:00:03.490,0:00:07.430
FISHER: All right. So, let's begin.
This session is: Going Social

0:00:07.430,0:00:11.600
with the YouTube APIs. I am
Jeff Fisher,

0:00:11.600,0:00:14.009
and this is Johann Hartmann,
we're presenting today.

0:00:14.009,0:00:15.889
[pause]

SubRip (SRT):

1
00:00:03,490 --> 00:00:07,430
FISHER: All right. So, let's begin.
This session is: Going Social

00:00:07,430 --> 00:00:11,600
with the YouTube APIs. I am
Jeff Fisher,

2
00:00:11,600 --> 00:00:14,009
and this is Johann Hartmann,
we're presenting today.

3
00:00:14,009 --> 00:00:15,889
[pause]

Timed Text Markup Language (TTML):

<tt xml:lang="" xmlns="http://www.w3.org/ns/ttml">
  <body region="subtitleArea">
    <div>
      <p xml:id="subtitle1" begin="0.76s" end="3.45s">
        It seems a paradox, does it not,
      </p>
      <p xml:id="subtitle2" begin="5.0s" end="10.0s">
        that the image formed on<br/>
        the Retina should be inverted?
      </p>
    </div>
  </body>
</tt>

Transcript

<?xml version="1.0" encoding="utf-8" ?>
<transcript>
    <text start="10" dur="2">Hi, I&amp;#39;m Emily from Nomensa</text>
    <text start="12" dur="3">and today I&amp;#39;m going to be talking about the order of content on your pages.</text>
    <text start="16" dur="6">Making sure the content on your web pages is presented logically is a really important part of web accessibility.</text>
    <text start="23" dur="2">Page content should be ordered so it makes sense</text>
</transcript>

Microsoft SAMI (SAMI, SMI):

<SAMI>
<Head>
   <Title>President John F. Kennedy Speech</Title>
   <SAMIParam>
      Copyright {(C)Copyright 1997, Microsoft Corporation}
      Media {JF Kennedy.wav}
      Metrics {time:ms; duration: 73000;}
      Spec {MSFT:1.0;}
   </SAMIParam>
</Head>

<Body>
   <SYNC Start=0>
      <P Class=ENUSCC ID=Source>Pres. John F. Kennedy
   <SYNC Start=10>
      <P Class=ENUSCC>Let the word go forth,
         from this time and place to friend and foe
         alike that the torch
</Body>
</SAMI>

Credits

Companies

cirb CIRB / CIBG

makinacom

Authors

Changelog

1.2.1 (2012-08-07)

  • force rawcontent to be unicode

1.2 (2012-08-06)

  • add support for time format like start=”1.8” in transcript
  • add youtube download captions: captionstransformer.youtube.get_captions & get_reader

1.1 (2012-08-05)

  • add extension and mimetype info into REGISTRY
  • add id info into REGISTRY

1.0 (2012-07-23)

  • Initial release

Project details


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