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@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@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@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@mplayerhq.hu'" <mplayer-users@mplayerhq.hu> From: DEBERT Jean-Louis <jl.debert@rsd.com> subject: RE: [MPlayer-users] mpeg -> dxr3 hwac3 sound Date: Tue, 12 Nov 2002 09:54:00 +0100 Reply-To: mplayer-users@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.
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Message: 8 From: "Andrew Goodney" <andy@falsetruth.net> To: <mplayer-users@mplayerhq.hu> Date: Tue, 12 Nov 2002 01:21:12 -0800 Subject: [MPlayer-users] Codec request Reply-To: mplayer-users@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@falsetruth.net ------------------------ "Looks like there is no money for you, crazy round man!" -Samurai Jack
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