Video file to subtitles file

[Christian Gollwitzer]

Am 30.08.20 um 17:25 schrieb MRAB:
> On 2020-08-30 07:23, Muskan Sanghai wrote:
>> On Sunday, August 30, 2020 at 11:46:15 AM UTC+5:30, Chris Angelico wrote:
>>> I recommend looking into CMU Sphinx then. I've used that from Python.
>>> The results are highly entertaining.
>>> ChrisA
>> Okay I will try it, thank you.
>>
> Speech recognition works best when there's a single voice, speaking 
> clearly, with little or no background noise. Movies tend not to be like 
> that.
> 
> Which is why the results are "highly entertaining"...


Well, with enough effort it is possible to build a system that is more 
useful than "entertaining". Google did that, English youtube videos can 
be annotated with subtitles from speech recognition. For example, try 
this video:
https://www.youtube.com/watch?v=lYVLpC_8SQE

Go to the settings thing (the little gear icon in the nav bar) and 
switch on subtitles, English autogenerated. You'll see a word-by-word 
transcription of the text, and most of it is accurate.

There are strong arguments that anything one can build with open source 
tools will be inferior. 1) They'll probably have a bunch of highly 
qualified KI experts working on this thing 2) They have an enormous 
corpus of training data. Many videos already have user-provided 
subtitles. They can feed all of this into the training.

I'm waiting to be disproven on this point ;)

	Christian