Dreamcast 4XM video testing

[MoeFoh]

If you want DVD quality, then the files are going to be large, really large, I can already see that with my low-bitrate test of 700k. It's not hard to extrapolate out. You are talking many, many CDR's or digital files for a 90m movie @5000k. That's a project I would not be interested in (MoeFoh has little patience). I was reading on Wiki, a typical DVD would use a video bitrate of 5000k, so I would think that would be a reasonable value to use. Also, DVD uses 48.1k sample rate and AAC and we know the Dreamcast does not support 48.1k. My mistake in thinking we could make something for the deprived people in North Korea, who are not concerned about video quality, just something that's viewable.

For what it's worth, I have always liked Ian, he has done a lot for the community for a long time.

[SMiTH]

its all good dude.
i was looking forward to you helping us with this project.
no worries.
i know you like ian, i just didn't want any1 getting upset at eachother is all.

[MoeFoh]

The matrix.4mv is using a bitrate of 1411k and this is said to be DVD quality on the dreamon CDI, so maybe this bitrate would be a good compromise between size and encoding speed.
Input #0, 4xm, from 'matrix.4xm':
Duration: 00:15:30.37, start: 0.000000, bitrate: 1411 kb/s
Stream #0:0: Video: 4xm, rgb565le, 640x480, 23.97 tbr, 23.97 tbn
Stream #0:1: Audio: adpcm_4xm, 44100 Hz, 2 channels, s16p, 1411 kb/s

The original video.4xm on the dev dreamon release also uses a bitrate of 1411k.

[MoeFoh]

Here's one that spec-wise matches the VIDEO.4XM on the dreamon demo:
Input: avi, 640x368 1400k vbr video, mp3 44.1k 128k stereo audio.
Compressor settings: 25 fps, 184000 data rate (min. value)
Works on GDEMU.

Will do another test with 800000 in the data rate field and see what happens. Any predictions?

[Dakangel]

The matrix.4mv is using a bitrate of 1411k and this is said to be DVD quality on the dreamon CDI, so maybe this bitrate would be a good compromise between size and encoding speed.
Input #0, 4xm, from 'matrix.4xm':
Duration: 00:15:30.37, start: 0.000000, bitrate: 1411 kb/s
Stream #0:0: Video: 4xm, rgb565le, 640x480, 23.97 tbr, 23.97 tbn
Stream #0:1: Audio: adpcm_4xm, 44100 Hz, 2 channels, s16p, 1411 kb/s

The original video.4xm on the dev dreamon release also uses a bitrate of 1411k.

The video codec and the program will always look for a way to make sure that the result is not going to depart from the standard for the time in which they were made.

In 1999 the media in which they could be distributed would be either a CD or the Mil-cd or even the Gdrom and even more a slow internet connection for the time.
So no matter how much you try to raise the quality to the maximum, it will always block the result video to enter in those standards.

I can share with you a bit rate calculator that I used back in 2005 or so to create my VCD movies.
It was very useful since it calculates the final size based on the quality of the video and audio you want to use.
Is funny when you want to create a multi movie DVD with VCD quality and the final result looks more like a VHS.

[Ian Micheal]

The matrix.4mv is using a bitrate of 1411k and this is said to be DVD quality on the dreamon CDI, so maybe this bitrate would be a good compromise between size and encoding speed.
Input #0, 4xm, from 'matrix.4xm':
Duration: 00:15:30.37, start: 0.000000, bitrate: 1411 kb/s
Stream #0:0: Video: 4xm, rgb565le, 640x480, 23.97 tbr, 23.97 tbn
Stream #0:1: Audio: adpcm_4xm, 44100 Hz, 2 channels, s16p, 1411 kb/s

The original video.4xm on the dev dreamon release also uses a bitrate of 1411k.

The video codec and the program will always look for a way to make sure that the result is not going to depart from the standard for the time in which they were made.

In 1999 the media in which they could be distributed would be either a CD or the Mil-cd or even the Gdrom and even more a slow internet connection for the time.
So no matter how much you try to raise the quality to the maximum, it will always block the result video to enter in those standards.

I can share with you a bit rate calculator that I used back in 2005 or so to create my VCD movies.
It was very useful since it calculates the final size based on the quality of the video and audio you want to use.
Is funny when you want to create a multi movie DVD with VCD quality and the final result looks more like a VHS.

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- Ex 3 : a 640*480 video at 60 frames/sec on the Dreamcast (SEGA).
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Far better then any VCD it's just not going to fit.. I have Proved this with this SB CDI if you missed it download it and see
above this nothing like the others your talking about..

You can Make HDDVD on 3 normal dvd's as well lol that play in HD format on HDDVD player I have done this the format or meda does not matter in this case but the tech above

Only fit 15 mins or less on one CDR at DVD Quality and it can be done and works on a dreamcast .


4xm does DVD quality on any format

- On any supports: CD, DVD, GD ROM,…
Max bit rate is only the speed of the drive it's self with this codec it's not like mpeg or the others your talking about

[MoeFoh]

The matrix.4mv is using a bitrate of 1411k and this is said to be DVD quality on the dreamon CDI, so maybe this bitrate would be a good compromise between size and encoding speed.
Input #0, 4xm, from 'matrix.4xm':
Duration: 00:15:30.37, start: 0.000000, bitrate: 1411 kb/s
Stream #0:0: Video: 4xm, rgb565le, 640x480, 23.97 tbr, 23.97 tbn
Stream #0:1: Audio: adpcm_4xm, 44100 Hz, 2 channels, s16p, 1411 kb/s

The original video.4xm on the dev dreamon release also uses a bitrate of 1411k.

The video codec and the program will always look for a way to make sure that the result is not going to depart from the standard for the time in which they were made.

In 1999 the media in which they could be distributed would be either a CD or the Mil-cd or even the Gdrom and even more a slow internet connection for the time.
So no matter how much you try to raise the quality to the maximum, it will always block the result video to enter in those standards.

I can share with you a bit rate calculator that I used back in 2005 or so to create my VCD movies.
It was very useful since it calculates the final size based on the quality of the video and audio you want to use.
Is funny when you want to create a multi movie DVD with VCD quality and the final result looks more like a VHS.

4xm sure set a high standard, then.

[Ian Micheal]

The matrix.4mv is using a bitrate of 1411k and this is said to be DVD quality on the dreamon CDI, so maybe this bitrate would be a good compromise between size and encoding speed.
Input #0, 4xm, from 'matrix.4xm':
Duration: 00:15:30.37, start: 0.000000, bitrate: 1411 kb/s
Stream #0:0: Video: 4xm, rgb565le, 640x480, 23.97 tbr, 23.97 tbn
Stream #0:1: Audio: adpcm_4xm, 44100 Hz, 2 channels, s16p, 1411 kb/s

The original video.4xm on the dev dreamon release also uses a bitrate of 1411k.

The video codec and the program will always look for a way to make sure that the result is not going to depart from the standard for the time in which they were made.

In 1999 the media in which they could be distributed would be either a CD or the Mil-cd or even the Gdrom and even more a slow internet connection for the time.
So no matter how much you try to raise the quality to the maximum, it will always block the result video to enter in those standards.

I can share with you a bit rate calculator that I used back in 2005 or so to create my VCD movies.
It was very useful since it calculates the final size based on the quality of the video and audio you want to use.
Is funny when you want to create a multi movie DVD with VCD quality and the final result looks more like a VHS.

4xm sure set a high standard, then.

Yeah it's not just bitrate using gpu and the encoding is not normal packing every frame in almost loss less format that's why the out put is so big

[Ian Micheal]

You can make a 4xm video of any bitrate you want it's only the speed of the drive Not the size of the drive ..if you have not read again i post for you

Max bitrate this if gdrom drive is the speed of the drive so
12× 1,800 14.7456 1.76 2,400–6,360

-On a CD, maximum bitrate for video files is ~1.4mbps this not 4xm but the speed of the gdrom drive
click to read large

4X Movie Presentation 2.pdf

(297.9 KiB) Downloaded 128 times

4X Movie For Dreamcast 4.5.pdf

(324.67 KiB) Downloaded 135 times

4X Movie Presentation 1.pdf

(71.41 KiB) Downloaded 151 times

Clearly 4xm is not like anything else in this fact DVD Quality on 166mhz p1


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high definition from low-end computers upwards
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API C/C++, Xtra Director, ActiveX
4X Movie allows full screen display of your animated sequences
(video, cinema, computer generated, etc) with DVD quality and
even on low-end computers.

[MoeFoh]

With 800k in the data rate field instead of the minimum value of 184k. Looks pretty good to me. Still need to run it through GDEMU.