[Feature Request]: subtitle autotranslate into selected language

[edmundlaugasson]

Guidelines

• I have searched the issue tracker for open and closed issues that are similar to the feature request I want to file, without success.
• I have searched the documentation for information that matches the description of the feature request I want to file, without success.
• This issue contains only one feature request.

Problem Description

Subtitles are often needed to be translated into selected language - very much missing feature for now. Feature exist in web version of YouTube. This will improve already existing subtitle feature.

Proposed Solution

The CC button could have an option to autotranslate subtitle. In Settings there could be an option to select the language for subtitle autotranslation. For subtitle, the Subtitle Settings could be created. Automatic language selection for subtitle autotranslate could be based on operating system language.

Alternatives Considered

Manually open video in web to get subtitle autotranslation - very uncomfortable.

Issue Labels

improvement to existing feature

Additional Information

Actually currently the missing feature of subtitle translation renders FreeTube quite useless in case when subtitle autotranslation is needed. To be honest, it is quite often needed.
Tested FreeTube version: v0.19.1 Beta (Flatpak)
OS: Linux Mint XFCE

[absidue]

FreeTube already does this on the local API for English videos when your "Locale Preference" (the language that FreeTube is displayed in) is not English and the video doesn't have any subtitles in that language. Due to a bug it only works for English videos, but it will work for all video languages after the currently on-going player migration.

We cannot do subtitle translation when the Invidious API is selected, because public Invidious instances don't use the normal way of getting subtitles, as the ratelimit for that is too low on YouTube's side (you may remember a few years ago that no Invidious instance had working subtitles, that's why). Their alternate way of getting subtitles doesn't support translation (if they switched back to the original way you would have no subtitles at all, because they would hit the ratelimit in no time, just like they used to).

[absidue]

Here is what it looks like when FreeTube's locale preference is set to French and you visit the latest video on the official @YouTube channel: https://youtu.be/78Ok52tMB30

[github-actions]

This issue has been automatically closed because there has been no response to our request for more information from the original author. With only the information that is currently in the issue, we don't have enough information to take action. Please reach out if you have or find the answers we need so that we can investigate further.