squirrel VS lossless-cut

RIME/Squirrel - super flexible input engine for Chinese typing.

I don't know how to solve your problem but one open source alternative that basically works on every system is Rime. Seems like this is the MacOS one: https://github.com/rime/squirrel

Use RIME.

It's an open source IME for your computer, https://rime.im/ and it has support for a lot of cool input methods including pinyin and zhuyin of course, as well as Shanghainese and Cantonese phonetic input, wubihua, cangjie, and a whole lot more. You can also easily switch between traditional and simplified characters with a few keystrokes. My favorite feature might be that one of the pinyin input methods, 地球拼音, allows you to enter tones on your pinyin to narrow down the characters that it suggests.

If you're stuck only using stock software (like on a company PC), do this, otherwise I'd really suggested RIME. It's open source, free and supports a lot more types of Pinyin. Traditional Chinese included. You can even select Terra Pinyin if you want to be able to filter the suggestions by tone.

You can try rime.

Try Rime and choose "朙月拼音•臺灣正體", it supports typing traditional Chinese in Pinyin and fits Taiwan standard for characters.

As a native chinese speaker, I recommend you install rime. It's smart and basically support all kinds of chinese input methods. To install, refer to the ubuntu section of this page and install all the require package using apt. Then open the setting app, go to region & language and click manage installed language. First change the input method framework back to ibus in the "keyboard input method system" section. Then click manage installed language, select Installed/Remove language, tick the language you want to use (In your case japanese and chinese).

For lossless cut, there's the LosslessCut [1] app, which even has an experimental but mostly working version of a "smart cut" feature [2] (aka. only re-encode the minimal mandatory amount of frames if you trim at a point between 2 key frames)

[1]: https://github.com/mifi/lossless-cut

[2]: https://github.com/mifi/lossless-cut/issues/126

> thought I cropped/edited a video, it is still there in full length and resolution

It's been possible to create a clip from a video file that merely changes what parts of the video are displayed without effecting the data in the original since the Classic Mac OS days.

If you want to completely remove unwanted portions of a video to reduce the size without a loss of quality, there are many options. LosslessCut is one option that is both free and open source.

https://github.com/mifi/lossless-cut

LosslessCut

Lossless Cut is probably the simplest way to cut out parts of a video without having to re-encode it or use an online service. It is open source, free and available for all platforms. It is in essence a frontend for FFMPEG and cuts without re-encoding, so the results are instantaneous.

Additionally I would like if possible to shorten (both to reduce dimension and to make them less boring) my videos by trimming the beginning and/or ends where often there is nothing interesting happening and possibly change the thumbnails for easier identification. Do you know of any tool that does the job with the minimum quality degradation possible? Many years ago I've tried with some videos and a tool I don't remember anymore, ending up with a bunch of corrupted files :( I've found https://github.com/mifi/lossless-cut for the point above.. need to try it. please let me know what experience you have with it.

Lossless Cut would probably be a better choice for this. Will let you cut out the commercials without having to re-encode the video.

>Of course, you could only re-encode only the GoPs that get broken while keeping the rest intact, and I guess this would be better and a lot faster than re-encoding everything. I don't know if any application tries to do this.

LosslessCut does have experimental support for this partial re-encode called "smart cut" [1]. Since it's using ffmpeg internally, the challenge become how to instruct ffmpeg to do this[2]?

[1]: https://github.com/mifi/lossless-cut/issues/126