nolibgs_hello_worlds/hello_str

This example will play a fullscreen STR file and is as straightforward as possible. If you need more advanced control other the display size and position, see the STR playback library section.

Compiling

You need mkpsxiso in your $PATH to generate a PSX disk image. Typing

make

in a terminal will compile and generate the bin/cue files.

Typing

make cleansub

will clean the current directory.

STR playback library

@Lameguy64 has spent some time making a STR playback library that's easily included in a project :

One thing that I find somewhat missing here is a decent piece of code for playing STR video files easily. So, what I did was take the old and messy PsyQ STR player example, clean it up entirely, and finally make it into a cute little c library for easy implementation.

Original post : http://www.psxdev.net/forum/viewtopic.php?t=507
Original download link : https://www.mediafire.com/download/s61u86sxd1djncy/strplay.7z
Mirror : http://psx.arthus.net/code/strplay.7z

Converting to AVI

You need AVI file 320x240, 15 fps, 24-bit color, Stereo 16-bit sound @ 44100 Hz.

Stream #0:0: Video: rawvideo, bgr24, 320x240, 27763 kb/s, 15 fps, 15 tbr, 15 tbn, 15 tbc
Stream #0:1: Audio: pcm_u8 ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, u8, 705 kb/s

Video to AVI

Use Virtualdub or ffmpeg :

ffmpeg -i $INPUT.MKV -vcodec rawvideo -pix_fmt bgr24 -vf scale=320:240,setsar=1:1 -acodec pcm_u8 -ar 44100 -r 15 $OUTPUT.avi

AVI to STR

Use MC32.EXE to convert the AVI file to STR using these settings :

Format : Input : Avi (Uncompressed), Output : str (MDEC)
Sound: 37.8 KHz, Stereo;
Easy: Double Speed, 15 fps, 1ch, Leap Sector;
MDEC: version 2

If MC32.exe crashes when hitting the 'Go' button, you have to open the ffmpeg AVI file in virtualdub, then save it again ; File > Save as AVI... or F7 key, then retry.

You should now have a STR file and a XA file that you have to interleave in MC32:

Format : Input : str (MDEC), Output: str (MDEC)
Sound: Input: XA , 37.8 KHz, Stereo;
Frame rate: 15 fps, # Channels : 1(150sectors/s), Leap Sector;
CD-ROM speed : Double Speed;

Finding a video's frame count

With ffmpeg :

ffprobe -v error -select_streams v:0 -count_packets -show_entries stream=nb_read_packets -of csv=p=0 VIDEOFILE.AVI

Alternatively, open the STR file in MC32.exe and look at the bottom left of the window.

Tools & Refs

MC32 : http://psx.arthus.net/tools/pimp-psx.zip
STR converter : http://psx.arthus.net/tools/str_converter.rar

Original PsyQ sample code :

/psyq/psx/sample/scee/CD/MOVIE2
/psyq/addons/cd/MOVIE (same as /psx/sample/cd/MOVIE )
/addons/sound/STREAM/TUTO2.C

Original post : http://www.psxdev.net/forum/viewtopic.php?t=507
Video to STR conversion tutorial : http://www.psxdev.net/forum/viewtopic.php?f=51&t=277
MDEC notes : http://psx.arthus.net/sdk/Psy-Q/DOCS/TECHNOTE/mdecnote.pdf

Video credits

The video and song used in this example are by Nina Paley : https://archive.org/details/CopyingIsNotTheft-ScratchTrack1280X720Hdv