Option to convert subtitle format

[qnapi]

Option to convert subtitle format

[zadziora]

This is good feature - thought I think TXT might be just renamed to SRT and it will be ok.

[krzemin]

Actually renaming is not a real conversion.

It would be nice to have general conversion mechanism (any format to any format including input auto-detection). But that require reliable way to retrieve FPS from any kind of movie file.

[zadziora]

You are absolutelly right.
My mistake.
I think SRT is a good format to have.

[krzemin]

I think I've found multi-platform way to retrieve meta-data from any kind of movie file.

https://ffmpeg.zeranoe.com/forum/viewtopic.php?t=1977

However it requries ffprobe which is part of ffmpeg package in most of Linux distros. In case of Windows/OSX there are static builds of ffprobe only (http://ffmpeg.zeranoe.com/builds/win32/static/ and https://evermeet.cx/ffmpeg/) which could be shipped with installer/dmg.

[krzemin]

General subtitle format conversion (from any format to any) is now implemented. There is support for 4 formats: SRT, mDVD, TMP, MPL2. Beside automatic conversion during subtitle post-processing, there is new conversion window where subtitles can be converted afterwards (including frame rate changing).

However nothing for free. Now ffprobe binary (from ffmpeg package) is required for frame rate detection. Static binaries will be provided with exe/zip/dmg packages for Windows/OSX which increase their size a bit. Under Linux ffmpeg should be declared as package dependency.