Preload a scene or picture?

Check the wiki. http://wiki.visionaire-tracker.net/wiki/Image_Encoding

I've linked the batch tool I use & how to use it.

P.S: if you were to open up your ved file in a text editor like sublime text, atom or notepad++ then you would be able to do a search & replace of all instances containing ".png" & replace them with ".webp" in a matter of seconds. We do however recommend backing up your ved before opening them up in a text editor as it's very easy to mess something up in the xml code.

Thank you. I did this ved-exchange for mp3-files to ogg-files. Of course I need the same file names as *.ogg. The same with *,png and *.webp either.

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...as they are not supported by the large majority of image editing applications

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That's what I means... ;-) But I'm going to try it. I think I will work with png up to upload the final game, then I change the whole stuff into webp...

Machtnix

We keep the png & psd files for editing, but we convert & implement the converted webp files from the beginning.

There is supposed to be a plugin for webp for photoshop (well for exporting to webp at least, not sure about opening & editing webp files).

Yes, there is a plugin for photoshop and you can "save as" webp and open/work on webp files. The best converter I've found to change lot of images in one single click is XnConvert from Irfanview.

Yeah XnConvert is great. It's what I've recommended on the wiki page. So easy to use & can convert tons of files in record time.

I think it's better to work / edit the original image files as opposed to the inferior webp files mind. The original files are going to be better no matter what.

I downloaded the converter and will try it. My Photoshop is an oldfashioned one - I don't think, I can get this plugin yet.

But nevertheless which format is used - the problem of no-preloading is still there...

I have found that, for me, the best tools are:
- Irfanview to convert to webp (possible batch conversion)
- Mediacoder to convert to mkv in vp8 or vp9 with ogg sound
- Audacity to convert mp3 to ogg vorbis
With these 3 free tools, I have all I need and my game works fine.

Regarding the preloading issue, I think I will try something like Machtnix says, by loading the scene in a "hidden" way somehow.

Not heard of the first 2 apps you've mentioned. I like XnConvert for webp conversion - it's also free & supports batch conversion & macros. I'll check out the mediacoder app you mentioned as I don't have anything for video encoding / conversion - it's not something I know a right lot about.

About XnConvert :

After reading some documentation, I'd recommend to set the 'compression method' found in the webP output settings to 6.

As a result you'll be able to get a better quality image and a lighter file, although it may take a little bit longer to convert.

I set 'filter strenght' value to 50 or so, but we don't really care.

I let 'filter sharpness' value to default 0.

All is explained here : https://developers.google.com/speed/webp/docs/cwebp

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There is a cool stuff for Windows that aims to let you see webP files into your File Explorer and open them with the default viewer. Here : https://developers.google.com/speed/webp/docs/webp_codec

There is also a Visionaire option to compress automatically before create the vis-file, but it doesn't work properly for all games. Sometimes some transparency disappears. But it's possible to get a size of 50%.

I only need a tool for pictures and maybe movies, my sound tools make ogg-files.

Machtnix

Well you can't go wrong with XnConvert for the images.

What sound apps you using?