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Upcoming Release8 Will Allow More MIPSpage  1 2 

Gunnar von Boehn
(Apollo Team Member)
Posts 5581
22 Nov 2021 12:13


The upcoming RELEASE 8 for V4 Standalone and Firebird does allow optional switching to Turbo Mode.
(This mode will run on number card but not all)
 



Roger Andre Lassen

Posts 141
22 Nov 2021 12:41


Very nice :-) Good work !


Cyberstormer Amiga

Posts 13
22 Nov 2021 17:26


You give new life and use to Amiga :)


Steve Hodson

Posts 21
22 Nov 2021 18:13


This is great, all hail the return of TURBO_MODE switch. I think I had one on a 486 way back when, clocked either from 25 to 33 or 33 to 40MHz :D

The V4 is *much* faster :D


John William

Posts 480
22 Nov 2021 20:57


We need 4 x times the current speed release8 offers to have a good experience with dosbox.  I think we need 512 x times the current speed of release8 offers to be able to play mp4 and all other compressed movies without using mpeg format. Maybe even be able to do youtube directly on a browser hehe.


NoXLar - DemoSceneLover

Posts 43
23 Nov 2021 04:43


512 times? what about using ammx they tell us is super duper fast


Gunnar von Boehn
(Apollo Team Member)
Posts 5581
23 Nov 2021 07:13


John William wrote:

We need 4 x times the current speed release8 offers to have a good experience with dosbox.

 
The 68080 is clock be clock a very fast CPU.
If you look at benchmark then you see that the 68080 is roughly 10 times more efficient per clock than an 68030 CPU. This means the 100Mhz V4 offers about the speed of a 1000MHz 68030.
The FPGA technology we are using will not allow more than this.
 
I think that this is excellent performance for running Amiga applications.
 
 
 
John William wrote:

think we need 512 x times the current speed of release8 offers to be able to play mp4

The 68080 is fast enough to play small MP4 movies.
We did this already on the Vampire.
 


John William

Posts 480
23 Nov 2021 14:57


Gunnar von Boehn wrote:

John William wrote:

  We need 4 x times the current speed release8 offers to have a good experience with dosbox.
 

 
  The 68080 is clock be clock a very fast CPU.
  If you look at benchmark then you see that the 68080 is roughly 10 times more efficient per clock than an 68030 CPU. This means the 100Mhz V4 offers about the speed of a 1000MHz 68030.
  The FPGA technology we are using will not allow more than this.
 
  I think that this is excellent performance for running Amiga applications.
 
 
 
 
John William wrote:

  think we need 512 x times the current speed of release8 offers to be able to play mp4
 

  The 68080 is fast enough to play small MP4 movies.
  We did this already on the Vampire.
 

Really??! What application do we use to run mp4 movies? When you said small mp4 movies, you mean like 1 or 2 minute maximum? If it can play 1 or 2 minute movie fine...why can't it play an hour movie?



Manos Sg

Posts 80
24 Nov 2021 07:48


This is a nice boost, thank you!


Henrich Raduska

Posts 53
24 Nov 2021 09:01



 
  Really??! What application do we use to run mp4 movies? When you said small mp4 movies, you mean like 1 or 2 minute maximum? If it can play 1 or 2 minute movie fine...why can't it play an hour movie?
 
 

  Small is probably not short. :-)


Olaf Schoenweiss

Posts 688
24 Nov 2021 10:05


small in this context propably means lower resolution


Przemyslaw Tkaczyk

Posts 154
24 Nov 2021 14:43


John William wrote:

  Really??! What application do we use to run mp4 movies? When you said small mp4 movies, you mean like 1 or 2 minute maximum? If it can play 1 or 2 minute movie fine...why can't it play an hour movie?

As previously stated "small" means resolution (and bitrate as well), not length. Like with regular MPEGs, it's decoding a certain frame size that is CPU-hungry, not its duration.



John William

Posts 480
24 Nov 2021 16:14


Ok. Then I have following questions to ask:

A) What resolution it needs to be?
C) What program in Windows I can use to do the conversion?
D) How do I convert mp4 from it's original state to another mp4 with lower resolution?
E) What Amiga program I can use to run mp4?


James Leadbeater

Posts 1
24 Nov 2021 17:16


Riva plays video files not sure what format and resolution
I would say standard def resolutions.... so upto 480 maybe? I dont see much point in videos on amiga really unless some how we can get youtube working.


Roy Gillotti

Posts 485
24 Nov 2021 17:36


Well wasn't there some kind of ibrowse youtube plug, it worked through some third party website which transcoded the youtube video to the right format and streamed it to the Amiga.


Roy Gillotti

Posts 485
24 Nov 2021 17:44


In the past I used ffmpeg on my linux machine for conversion of videos for use with my V2 vampire based on Niclas A command he shared here:
 
  EXTERNAL LINK 

Quality isn't really that bad, Seems to me it would be cool to make some front-end application for Riva that could connect to a transcoding server like Universal Media Server and could pick videos from a library and have it transcode on the fly.
 


John William

Posts 480
24 Nov 2021 17:55


How about ffplay for Amiga? Would that work to run videos smoothly?


Przemyslaw Tkaczyk

Posts 154
24 Nov 2021 20:23


Well, as the H264 is at the moment just an experiment as far as I reckon and also you still need to convert MP4 to something else, I suggest converting to a plain MPEG so that RiVa in its current form can handle them easily. I use ffmpeg for that (commandline tool) like this:

ffmpeg -i "input.mp4" -s 640x360 -vcodec mpeg1video -b:v 2500k -bf 3 -ac 2 -acodec mp2 -b:a 128k output.mpg

You can experiment with -b:v to lower the bitrate for smaller filesizes, for example -b:v 1M, -b:v 800K, etc.


John William

Posts 480
24 Nov 2021 21:29


Ooh! I already have the script stored in my notepad to convert mp4 to mpeg. I was thinking of playing mp4 directly, skipping conversion.


Roy Gillotti

Posts 485
24 Nov 2021 22:33


John William wrote:

  How about ffplay for Amiga? Would that work to run videos smoothly?
 

  Yeah aminet has it for 68k amiga, but I doubt it's AMMX optimized like Riva.
 
  It's also bundled with ffmpeg, and that might be able to transcode a video at a snails pace, but it likely would take days instead of minutes on a PC.

Przemyslaw Tkaczyk wrote:

Well, as the H264 is at the moment just an experiment as far as I reckon and also you still need to convert MP4 to something else, I suggest converting to a plain MPEG so that RiVa in its current form can handle them easily. I use ffmpeg for that (commandline tool) like this:
 
 
ffmpeg -i "input.mp4" -s 640x360 -vcodec mpeg1video -b:v 2500k -bf 3 -ac 2 -acodec mp2 -b:a 128k output.mpg

 

This is essentially what I tried to link earlier, but my link seems to break after posting.

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