[rtve] Add support for audio only

[kebianizao]

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Description of your pull request and other information

This adds support to audio only urls to the rtve extractor. So far this extractor did not support urls like Audio only episode . With this extension such audio only url is supported.

The class supporting the above mentioned url includes a test case which runs successfully here.

[dstftw]

Read coding conventions.

[sukiletxe]

Also, with the new redesign this no longer works for downloading. Now you need to do the same thing that the video downloader does (i. e. get the formats from the png using _decrypt_url, replacing videos with audios in the png url).

[kebianizao]

Thanks for the comments, Sukil. I've addressed somehow the problems of the new urls (just pushed), but I'll look further into your suggestions. Regards,

[sukiletxe]

Weird, seems like with your test it works, but with other radio programs it doesn't and you have to take the _decrypt_url route. With these you get a generic url in filepath.

[kebianizao]

Thanks for your comment. I guess it is possible to improve something or fetch more information about the media, but I have tried some other urls and they work:

$ python3 -m youtube_dl -g https://www.rtve.es/play/audios/a-hombros-de-gigantes/palabra-ingeniero-codigos-informaticos-27-04-21/5889192/
https://mediavod-lvlt.rtve.es/resources/TE_SAHOMB/mp3/4/3/1619511337934.mp3
$ python3 -m youtube_dl -g https://www.rtve.es/play/audios/las-mananas-de-rne-con-pepa-fernandez/asier-etxeandia-actua-en-la-gala-de-los-premios-max/6124417/
https://mediavod-lvlt.rtve.es/resources/TE_SMAPPDE/mp3/3/7/1633339436173.mp3
$ python3 -m youtube_dl -g https://www.rtve.es/play/audios/atlantic-express/rafael-guastavino-arquitecto-novelesco-deslumbrante/6120193/
https://mediavod-lvlt.rtve.es/resources/TE_R800011/mp3/4/5/1633075321954.mp3
$ python3 -m youtube_dl -g https://www.rtve.es/play/audios/radiogramas/cinicos-10-05-21/5898967/
https://mediavod-lvlt.rtve.es/resources/TE_SRADIOG/mp3/5/2/1620637788325.mp3

Could you let me know of any that it is not working so I can test proof it myself?
Thanks,

[sukiletxe]

Every episode under https://www.rtve.es/play/audios/frankenstein-o-el-moderno-prometeo/, and https://www.rtve.es/play/audios/teatro-en-el-archivo-de-rtve/escalera-caracol-pajaros/3625815/, for example.

[kebianizao]

I've taken a look at those examples. The problem is that the json provided by the rtve api service https://www.rtve.es/api/audios/<id>.json does not contain the final media url in some cases, for instance, in the json section page.items[0].qualities[0]

• Working example: "filePath": "https://mediavod-lvlt.rtve.es/resources/TE_SAHOMB/mp3/4/3/1619511337934.mp3"
• Not working example: "filePath": "http://ztnr.rtve.es/ztnr/res/_PROVIDER_/audio/high/_TOKEN_"
  I'll try to find out another method for retrieving the right download url.

[sukiletxe]

I've already explained the correct method. Look at how the video extractor does it, and do the same thing, changing videos to audios when getting the thumnail url to pass it to _decrypt_url.
I don't know which formats are there going to be in all audio-only streams, but the in my testing there has been mp3 only.

[kebianizao]

Sorry not considering you advice, I now see png decrypt is required (by the way, extracting info like this is insane). I have pushed a first approach. I now need to refactor it more properly.

[kebianizao]

FYI I've moved to yt-dlp. I moved the PR to yt-dlp/yt-dlp#1657 Feel free to follow-up there.

[kebianizao]

Closing as PR is already merged.

[dirkf]

I'd rather keep it open to remind us to implement the functionality here, but probably by pulling the dlp code.