Dreamcast 4XM video testing

[SMiTH]

weird the video worked on nulldc with 48khz audio and 9000 bitrate.
i will test on real hardware.

media info shows 2794kbps overall bitrate.
video bitrate 2593
640x368 25fps
192kbps 48khz stereo

[Ian Micheal]

weird the video worked on nulldc with 48khz audio and 9000 bitrate.
i will test on real hardware.

If it did they might have a downsample code 48khz does not work on hardware

[SMiTH]

weird the video worked on nulldc with 48khz audio and 9000 bitrate.
i will test on real hardware.

If it did they might have a downsample code 48khz does not work on hardware

ya im thinking it downsamples the audio too
still weird though

[SMiTH]

works on real hardware
so now i guess i will convert a music video and use 9000 bitrate 640x368 25fps and 44.1 khz 192kbps stereo audio

[Ian Micheal]

works on real hardware
so now i guess i will convert a music video and use 9000 bitrate 640x368 25fps and 44.1 khz 192kbps stereo audio

Thats fking ace mate congrats

Still dont know why it works from dreamon only for me so far..

I did fine the src in archive from dumps from katana kits and it looks like it can be compiled to boot stand-alone i just have to do it

Dreamcast hardware cant run 48khz so it has to be downsample code..

9000 bitrate 640x368 25fps and 44.1 khz 192kbps stereo audio

9000 = a dvd

9000= 9 mbit/sec

Professionally encoded videos average a bitrate of 4–5 Mbit/s with a maximum of 7–8 Mbit/s in high-action scenes. Encoding at less than the max bitrate (like this) is typically done to allow greater compatibility among players,[16] and to help prevent buffer underruns in the case of dirty or scratched discs

As you see most uses 4000 or 4–5 Mbit/s

[SMiTH]

so why after using xilisoft to convert the avi with 9000 bitrate...

the media info of the converted avi shows:

2794kbps overall bitrate.
video bitrate 2593.

is the video actually 2593 bitrate even when converted at 9000 bitrate?
it is confusing.

the dreamon thing with 4xmplay is odd but i bet if we get another source i.e a dc game that uses 4xm
we could use that bin and it would not require ginxfer, ginreset, or a cfg file?

[Ian Micheal]

so why after using xilisoft to convert the avi with 9000 bitrate...

the media info of the converted avi shows:

2794kbps overall bitrate.
video bitrate 2593.

is the video actually 2593 bitrate even when converted at 9000 bitrate?
it is confusing.

the dreamon thing with 4xmplay is odd but i bet if we get another source i.e a dc game that uses 4xm
we could use that bin and it would not require ginxfer, ginreset, or a cfg file?

Must be vbr even so that's very high for a dreamcast lol

Like i noticed 4xm drops bit rate in scenes where it dont needs it dvd does this as well

DVD-Video discs have a raw bitrate of 11.08 Mbit/s, with a 1.0 Mbit/s overhead, leaving a payload bitrate of 10.08 Mbit/s. Of this, up to 3.36 Mbit/s can be used for subtitles, a maximum of 10.08 Mbit/s can be split amongst audio and video, and a maximum of 9.80 Mbit/s can be used for video alone

[SMiTH]

so i tested the music video on real hardware.
it has points where it slows down and audio glitches but i think we are close to finding the sweet spot.
more than likely drop the bitrate to 7000 and it might be fine?
i will upload it so you can check it out.
its still pretty cool imo.

---

Xilisoft details (mp4>avi):
640x368, 25fps, 9000 bitrate, 192kbps 44.1khz stereo MP3


Media Info of xilisoft converted avi:

MPEG-4 (Divx5)
Overall bitrate: 2059
Video stream: 1854 kbps, 640x368 (1.739), 25.000 fps
Audio stream: 192kbps, 44.1khz, stereo (MP3)

Converted 4XM:

47.1MB
video runtime: 4min 28sec
time spent converting: 2hrs 32min 39sec

4x_comp:

Speed: 25fps

Data rate:184000 (minimum)

[Ian Micheal]

so i tested the music video on real hardware.
it has points where it slows down and audio glitches but i think we are close at finding the sweet spot.
more than likely drop the bitrate to 7000 and it might be fine?
i will upload it so you can check it out.
its still pretty cool imo.

---

Xilisoft details (mp4>avi):
640x368, 25fps, 9000 bitrate, 192kbps 44.1khz stereo MP3


Media Info of xilisoft converted avi:

MPEG-4 (Divx5)
Overall bitrate: 2059
Video stream: 1854 kbps, 640x368 (1.739), 25.000 fps
Audio stream: 192kbps, 44.1khz, stereo (MP3)

Converted 4XM:

47.1MB
video runtime: 4min 28sec
time spent converting: 2hrs 32min 39sec

4x_comp:

Speed: 25fps

Data rate:184000 (minimum)

Great looking forward to it

[SMiTH]

here ya go.

https://mega.nz/file/xFpwCIib#sXi017IzB ... zbQcdw45kI