[MPlayer-users] Re: mpeg -> dxr3 hwac3 sound

[Jaroslav Tulach]

Denes, Jean-Luis, David,
thanks for your replies - my comments inlined. If there are other ideas 
how to do the mp2 -> ac3 conversion, please throw them in, because I am 
still not closer to solution for my problem.

-jst

Comments inlined...

 > From: Balatoni Denes <pnis at coder.hu>
 >
 > I don't know whether dxr3 can decode mp3/2/1 too not just ac3.
 > But format 0x50 is mp2 and it is an entirely different format from ac3
 > Anyway, I don't know how to do what you want, sorry.

Too bad. Anybody else knows a way how to convert mp2 to ac3? Btw. how to 
extract the audio stream from the mpeg2 stream? I can separate video one 
(extract_mpeg2) but is there a tool for separation of audio stream?

 > From: DEBERT Jean-Louis <jl.debert at rsd.com>
 >
 > Jaroslav Tulach wrote:
 >> I would like to play mpeg2 file thru my dxr3 card. Video
 >> works fine, but
 >> audio always prints "Audio: no sound!". Btw. playing DVD works, even
 >> with sound. Here is the command I use
 >>
 >> mplayer -vo dxr3:noprebuf -ao oss:/dev/em8300_ma -ac hwac3
 >
 >
 > I don't have the source available right now, but I'm pretty sure
 > that the device is /dev/em8300_ma-0   (the -0 at the end is
 > the card number since the driver allows for several ...)
 > This would explain the "Audio: no sound!" because it could never
 > open the device specified in your command line.

That is not the problem. First of all I am able to play DVDs. Second, as 
  David Holm expected I have a simlink from em8300_ma to em8300_ma-0. 
The problem is that I am not able to find any convertor from mp2 format 
to ac3.



> From: Jaroslav Tulach <jst at seznam.cz>
 >
> Hi.
> I would like to play mpeg2 file thru my dxr3 card. Video works fine, but 
> audio always prints "Audio: no sound!". Btw. playing DVD works, even 
> with sound. Here is the command I use
> 
> mplayer -vo dxr3:noprebuf -ao oss:/dev/em8300_ma -ac hwac3
> 
> with argument X.mpg or -dvd 1 (for DVDs). My version of mplayer is build 
> from CVS, so should be really uptodate.
> 
> I did a bit of digging and found out that when playing the mpeg file the 
>   audio format is 80 (0x50) and when playing DVDs the format is 8192 
> (0x200). hwac3 seems to be available just for 0x200, for 0x50 there are 
> only:
> 
> mp3
> ffmp2
> mad
> 
> and that is why no audio output is selected. Fine, but now I need help:
> 
> 
> User level: Which options to pass to mplayer to play also 0x80? Is there 
> a program that could process mpeg streams and change the audio format 
> from 0x80 to 0x200 on a fly? How do I make it work with mplayer? Or is 
> there something I should setup on dxr3 card (probably belongs to 
> dxr3.sf.net, but this forum might know the answer as well).
> 
> 
> Developer level: If user level fails I might be able to code something. 
> What would be necessary to change and in which source files to have 
> format 0x80 to 0x200 conversion? Easy/straighforward/hard/unknown level?
> 
> Thanks in advance for explanation/help.
> -jst
> 
> 
> Message: 7
> To: "'mplayer-users at mplayerhq.hu'" <mplayer-users at mplayerhq.hu>
> From: DEBERT Jean-Louis <jl.debert at rsd.com>
> subject: RE: [MPlayer-users] mpeg -> dxr3 hwac3 sound
> Date: Tue, 12 Nov 2002 09:54:00 +0100
> Reply-To: mplayer-users at mplayerhq.hu
> 
> Jaroslav Tulach wrote:
> 
> 
>> I would like to play mpeg2 file thru my dxr3 card. Video 
>> works fine, but 
>> audio always prints "Audio: no sound!". Btw. playing DVD works, even 
>> with sound. Here is the command I use
>> 
>> mplayer -vo dxr3:noprebuf -ao oss:/dev/em8300_ma -ac hwac3
> 
> 
> I don't have the source available right now, but I'm pretty sure
> that the device is /dev/em8300_ma-0   (the -0 at the end is 
> the card number since the driver allows for several ...)
> This would explain the "Audio: no sound!" because it could never
> open the device specified in your command line.
> 
> 
> 
> --__--__--
> 
> Message: 8
> From: "Andrew Goodney" <andy at falsetruth.net>
> To: <mplayer-users at mplayerhq.hu>
> Date: Tue, 12 Nov 2002 01:21:12 -0800
> Subject: [MPlayer-users] Codec request
> Reply-To: mplayer-users at mplayerhq.hu
> 
> I think it would be a good idea if mplayer supported some MJPEG-2000 based
> codec's. The results from MJPEG-2000 can be stunning at low bit rates. I
> have prepared two tar files and uploaded them to the incoming directory.
> 
> The first is from Image Power. www.imagepower.com
> It uses the fourcc ipj2 and is a vfw codec only
> 
> ftp://ftp.mplayerhq.hu/MPlayer/incomming/imagepower_mjpeg2000.tgz
> 
> The second is from Morgan Multimedia www.morgan-multimedia.com
> It uses the fourcc mj2c and is a vfw and directshow filter.
> 
> ftp://ftp.mplayerhq.hu/MPlayer/incomming/morgan_mjpeg2000.tgz
> 
> The three DirectShow filters have the info as following:
> {3902B4C1-1C41-423E-BEE6-66D72678C2CB};Morgan MJ2 Dest	Morgan
> Multimedia;C:\Program Files\Morgan\M3JPEG2K\MJ2Dest.ax
> {3902B4C0-1C41-423E-BEE6-66D72678C2CB};Morgan MJ2 Source	Morgan
> Multimedia;C:\Program Files\Morgan\M3JPEG2K\MJ2Source.ax
> {3902B4C2-1C41-423E-BEE6-66D72678C2CB};Morgan MJPEG2000 VFW Decompressor
> Morgan Multimedia;C:\Program Files\Morgan\M3JPEG2K\M3JP2KdecVFW.ax
> 
> I hope that support for these codecs can be added. I do not think people
> would be disappointed with the results. The Morgan codec at 1Mbps is many
> times better than any mpeg-4 derivative.
> 
> Thank you,
> Andrew Goodney
> andy at falsetruth.net
> ------------------------
> "Looks like there is no money for you, crazy round man!"
> -Samurai Jack
> 
> 
> 
> 
> --__--__--
> 
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