AVI question

[AAACHIPSET]

i have some avis  downloaded  an burnt from around 1997/1998  ..my 1200
can play them quite ok  ..if i download a avi from  a later time  i get a encoding error ..sound and movie ..how can i discover what encoding the avis from 1998 are ..id like to burn  a few things on cd  from more recent times  an be able to play on my 1200..

[amiman99]

VLC player can tell you which CODEC your avis are using.

Go to Tools>Codec Information

[Zac67]

AVI is just a container format. You need to have the correct codec as well. The AVI's FourCC code will tell you which one.

[AndyFC]

I'm interested to know about how you are playing AVIs.

What program do you use please, and if you find the format of the videos, can you post that too?

What frame size and frame rate do you get?

Thanks.

[fishy_fiz]

As mentioned already avi is a container.  Theres many, many codecs it can use.
Cinepak is probably the best compromise between speed and compression for slower hardware and can produce some decent results.
There's other options that give still better results on slow cpus, but the a1200's slow ide controller is a bottleneck so avoid them unless you use something like a fastata.
Also, make sure you have ks in fast ram as it makes a surprising difference in playback speed (especially with froggerng).

[AAACHIPSET]

various  movie  adds  ..startrek  voyager  previews from 1997..get about 15 frames a sec ..some play good  some  a bit  jerky  ..on my 030/50

[x303]

You might wanna try ffmpeg to convert the avi to mpg or play directly with ffplay [http://aminet.net/gfx/conv/ffmpeg-git7df9937-m68k.lha].

:biglaugh::biglaugh::biglaugh:

[LaserBack]

i have some avis  downloaded  an burnt from around 1997/1998  ..my 1200
can play them quite ok  ..if i download a avi from  a later time  i get a encoding error ..sound and movie ..how can i discover what encoding the avis from 1998 are ..id like to burn  a few things on cd  from more recent times  an be able to play on my 1200..

most of the avis of that time generally use intel indeo video 3

[fishy_fiz]

Ffplay requires RTG/sdl and is very slow vs things like moovid and froggerng anyway.
Its really only usable under emulation.

Converting to mpeg will also be slower than using cinepak.

[PanterHZ]

Most of the AVI video files included on the AmigaOS3.9 CD seems to have the following details:

Video:
Codec = Cinepak (cvid)
Size =  320 x 240
FPS = 20

Audio:
Codec = PCM (Uncompressed)
Rate = 22050Hz
Channels = 1 (Mono)
Sample = 16 bit

Have in mind that although the width is 320 pixels, the height varies in order to preserve aspect ratio.

This could at least be a starting point.

[NovaCoder]

Most of the AVI video files included on the AmigaOS3.9 CD seems to have the following details:

Video:
Codec = Cinepak (cvid)
Size =  320 x 240
FPS = 20

Audio:
Codec = PCM (Uncompressed)
Rate = 22050Hz
Channels = 1 (Mono)
Sample = 16 bit

Have in mind that although the width is 320 pixels, the height varies in order to preserve aspect ratio.

This could at least be a starting point.

Yep a good starting point.

I've noticed that those videos are very low quality, even if you watch them in a Window on Windows (confused?)

One strange thing that I noticed with video playback on Classics, if I play the same OS 3.9 video with an 030 and then an 060 the playback speed is not much better.   Considering the increase in MIPS (from 10 to 110), you'd expect a bigger improvement?

I've also played around and converted a few of my own clips to AVI but haven't got it working very well yet.

[fishy_fiz]

Perhaps the '060 offering little performance increase vs a fast '030 is due to a bottleneck with the a1200's ide controller.
Would be interesting to try a more heavily compressed video and compare (or even seeing how much of a difference running from ram: makes)

[x303]

Ffplay requires RTG/sdl

CyberGfx or Picasso96, yes; SDL, no...

[LaserBack]

Yep a good starting point.

I've noticed that those videos are very low quality, even if you watch them in a Window on Windows (confused?)

One strange thing that I noticed with video playback on Classics, if I play the same OS 3.9 video with an 030 and then an 060 the playback speed is not much better.   Considering the increase in MIPS (from 10 to 110), you'd expect a bigger improvement?

I've also played around and converted a few of my own clips to AVI but haven't got it working very well yet.

110 mips a 060 ? what ?
10 mips is a 030/50 in sysinfo the 060/50 is only 38 mips
an overclocked 060/100mhz is only 77 mips

anyways that is some times faster than the 030 the difference in playing compressed videos 030 vs 060 is way notorious,seems you are drunk

[LaserBack]

Most of the AVI video files included on the AmigaOS3.9 CD seems to have the following details:

Video:
Codec = Cinepak (cvid)
Size =  320 x 240
FPS = 20

Audio:
Codec = PCM (Uncompressed)
Rate = 22050Hz
Channels = 1 (Mono)
Sample = 16 bit

Have in mind that although the width is 320 pixels, the height varies in order to preserve aspect ratio.

This could at least be a starting point.

videos are in cinepack because cinepack is enough fast and low quality to be played on the slow 68k cpus
but generally avi videos in the web around 1998-2000 were using intel indeo 3 or 4, much better quality/small filesize but requiring more cpu power which most Amigas could not handle