This is a movie player for the NSpire calculator. http://youtu.be/Yx0L7ce5hq4
Precompiled binaries are available for download at http://www.omnimaga.org/index.php?topic=12855.0
At the moment, this is working for the NSpire CX. Porting to the older models is underway (and should work but is untested)
Only a POC at the moment. More polish to come.
I haven't had a look since the start of 2011 at nPlayer but at that time, it looked like it couldn't run for more than a few seconds. The compression they used was run length encoding.
This player uses a public domain jpeg decoder to decode each frame and relies on jpeg compression to keep file sizes low. This has a performance penalty on the calculator (it had trouble even running 15fps video natively) but significantly reduces the file size (especially for the CX where there's more pixel data).
I don't know about nPlayer, but a typical NMP movie file size is about ~2.86Mb per minute at 15fps.
Technically, this can also work with any image type supported by the stb_image.c file. This includes PNG images.
Clone this repo to some location on your computer. Alternatively, download an archive and extract it.
Make sure you have a working Ndless SDK. Go into the source code and change the movie filename.
Change into the directory and run make and it should compile everything.
First you need the following installed on your host machine:
- ffmpeg
- A C compiler
You can simply run make helper then you can use the ./convert.sh script and it'll do everything for you.
Otherwise, if you enjoy more control over the ffmpeg options, make a folder for all your frames. Then compile the helper.c program and copy the executable into your folder.
Change into your directory and run the following command on the command line:
ffmpeg -i /path/to/movie -s qvga -an -r 15 frame-%05d.jpg
This will spit out a whole lot of files. When it finishes, run the moviecompile program and it will produce a file. Copy this to your calculator along with the main program and run it. Make sure the extension ends in .nmp.tns.
Enjoy your movie.
Licenced under GPLv3. See LICENSE.