ABelliqueux/nolibgs_hello_worlds
1
0
Fork 0
Code Issues 1 Pull Requests 1 Projects Releases 1 Wiki Activity

Add link to STR example

Browse Source
This commit is contained in:
ABelliqueux 2021-07-20 20:05:07 +02:00
parent c4da39cfc6
commit 46b0794c34
1 changed files with 69 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

69
hello_str/README.md Normal file
View File

@ -0,0 +1,69 @@
This is a STR playback example by @Lameguy64 : http://www.psxdev.net/forum/viewtopic.php?t=507
> 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 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 :
```bash
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`](http://psx.arthus.net/tools/pimp-psx.zip) 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
```
![MC32-avi-str](https://wiki.arthus.net/assets/MC32-avi-str.png)
**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;
```
![MC32-avi-str-interleave](https://wiki.arthus.net/assets/MC32-avi-str-interleaved.png)
### Finding a video's frame count
With `ffmpeg` :
```bash
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/addons/cd/MOVIE`
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