Changing Subtitle Size

[jungleMan]

Hi there,

I've dug around a lot of code trying to figure out how to change subtitle size *while* the video is playing. I've come to a conclusion that the correct way to do this is via

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config_PutInt(vlc_obj, "freetype-fontsize", 56);

config_GetInt will then return correctly 56, which leads me to believe that I'm on the correct path. Unfortunately, this config change doesn't propagate to the player. I've tried using config_SaveConfigFile, but nothing changed. To be honest, I'm not sure what to pass as the first parameter in config_PutInt, or what to call afterwards to make the video view update. I've tried passing the core vlc instance, the media itself, etc.

Could someone please give me a hint where to look?

Thanks in advance!

[Jean-Baptiste Kempf]

You need to add a callback in the freetype module.

[jungleMan]

Thank you for your response. Could you please point me to where e.g. VLC (for OS X) does this so that I can study the code?

I am using VLCKit for OS X and am trying to hack my way into more advanced stuff using some internal pointers to the libvlc, so I'm not that familiar with the entire libVLC yet - I've gone through the entire vlc_modules.h, as well as went through the text_renderer module's source code, bug haven't found a way to add a callback.

I have confirmed via module_config_get(...), however, that the value indeed makes it all the way to the module config...

Again, thanks for your answer and thank you in advance for any pointers you can give me.

[Jean-Baptiste Kempf]

var_AddCallback

[jungleMan]

Do you mean modifying the FreeType/Quartz CoreText text renderer module to add a callback in the Create(...) method to handle the change and change the value in the filter from there? I.e.

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var_AddCallback(p_filter->p_module, "quartztext-rel-fontsize", FontSizeChanged, p_filter);

?

I'm just wondering how VLC on OS X does this without these callbacks. I've searched through all OS X code and it doesn't do anything special other then use the config_PutInt(...) function and the behaviour I'm trying to achieve just works...

[Jean-Baptiste Kempf]

Yes, something like that.

[jungleMan]

If I manage to get this working, would you be interested in a patch file so that others can benefit from this?

[Jean-Baptiste Kempf]

Yes.