99 lines
3.4 KiB
Markdown
99 lines
3.4 KiB
Markdown
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](https://github.com/ABelliqueux/nolibgs_hello_worlds/tree/main/hello_str#str-playback-library) section.
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## Compiling
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You need [mkpsxiso](https://github.com/Lameguy64/mkpsxiso) in your $PATH to generate a PSX disk image.
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Typing
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```bash
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make
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```
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in a terminal will compile and generate the bin/cue files.
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Typing
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```bash
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make cleansub
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```
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will clean the current directory.
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## STR playback library
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@Lameguy64 has spent some time making a STR playback library that's easily included in a project :
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> 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.
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Original post : http://www.psxdev.net/forum/viewtopic.php?t=507
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Original download link : https://www.mediafire.com/download/s61u86sxd1djncy/strplay.7z
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Mirror : http://psx.arthus.net/code/strplay.7z
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## Converting to AVI
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You need `AVI file 320x240, 15 fps, 24-bit color, Stereo 16-bit sound @ 44100 Hz`.
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```
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Stream #0:0: Video: rawvideo, bgr24, 320x240, 27763 kb/s, 15 fps, 15 tbr, 15 tbn, 15 tbc
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Stream #0:1: Audio: pcm_u8 ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, u8, 705 kb/s
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```
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### Video to AVI
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Use Virtualdub or ffmpeg :
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```bash
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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
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```
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### AVI to STR
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Use [`MC32.EXE`](http://psx.arthus.net/tools/pimp-psx.zip) to convert the AVI file to STR using these settings :
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```
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Format : Input : Avi (Uncompressed), Output : str (MDEC)
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Sound: 37.8 KHz, Stereo;
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Easy: Double Speed, 15 fps, 1ch, Leap Sector;
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MDEC: version 2
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```
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**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.**
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You should now have a STR file and a XA file that you have to interleave in `MC32`:
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```
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Format : Input : str (MDEC), Output: str (MDEC)
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Sound: Input: XA , 37.8 KHz, Stereo;
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Frame rate: 15 fps, # Channels : 1(150sectors/s), Leap Sector;
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CD-ROM speed : Double Speed;
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```
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### Finding a video's frame count
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With `ffmpeg` :
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```bash
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ffprobe -v error -select_streams v:0 -count_packets -show_entries stream=nb_read_packets -of csv=p=0 VIDEOFILE.AVI
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```
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Alternatively, open the STR file in `MC32.exe` and look at the bottom left of the window.
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### Tools & Refs
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MC32 : http://psx.arthus.net/tools/pimp-psx.zip
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STR converter : http://psx.arthus.net/tools/str_converter.rar
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Original PsyQ sample code :
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```
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/psyq/psx/sample/scee/CD/MOVIE2
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/psyq/addons/cd/MOVIE (same as /psx/sample/cd/MOVIE )
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/addons/sound/STREAM/TUTO2.C
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```
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Original post : http://www.psxdev.net/forum/viewtopic.php?t=507
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Video to STR conversion tutorial : http://www.psxdev.net/forum/viewtopic.php?f=51&t=277
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MDEC notes : http://psx.arthus.net/sdk/Psy-Q/DOCS/TECHNOTE/mdecnote.pdf
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## Video credits
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The video and song used in this example are by Nina Paley : https://archive.org/details/CopyingIsNotTheft-ScratchTrack1280X720Hdv
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