[MPlayer-dev-eng] Supporting em84xx as output device
Helmut Auer
vdr at helmutauer.de
Fri Sep 22 21:36:58 CEST 2006
P.P.S
>> I'm just trying to enhance the mpegpes output module to write to the em84xx decoder (successor of dxr3). My first try was the following:
>> Setting HAVE_DVB to 0 and adding the EM84 stuff by adding the define HAVE_EM84 to vo_mpegpes and ao_mpegpes ( analogue to HAVE_DVB ).
>> This works a little bit, which means I can see the video via the em84, but the decoder is not able to play the default mpegpes audio format.
>> This one is choosen:
>> ==========================================================================
>> Opening Audiodecoder: [mp3lib] MPEG layer-2, layer-3
>> AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)
>> Choosen Audiocodec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
>> ==========================================================================
>> which will translate the audio stream (when using mpegpes to file) to:
>> ==========================================================================
>> Opening Audiodecoder: [dvdpcm] Uncompressed DVD/VOB LPCM audio decoder
>> AUDIO: 48000 Hz, 2 ch, s16be, 1536.0 kbit/100.00% (ratio: 192000->192000)
>> Choosen Audiocodec: [dvdpcm] afm: dvdpcm (Uncompressed DVD/VOB LPCM)
>> ==========================================================================
>>
>> The em84 decoder is able tlay mp2 but not mp3, so can you give me any hints what I can try to get mp2 audio data instead of dvdpcm from the mp3lib ?!
>>
>> Thanks in advance
>>
>> Helmut Auer
>>
>>
>>
>>
> if necessary you should write an af_lavc to encode to mp2; this filter
> should be automatically
> inserted in the audio chain (for sure someone already began to write it).
> BTW, if your audio source is already in mp2 format you can use
> -ac hwmpa (mpeg audio pass through),
> but be aware that this decoder really sucks (surely my worst code in
> mplayer :) )
>
>
Sorry for writing so much mails ;)
I have additional informations:
Playing a DVD without Sound but perfekt video over EM84 takes only about
4 % CPU usage on a celeron 733
When I play the sound via Alsa or oss ( Thats working ) the CPU usage
goes up to 80-100 %.
I think that should be much less ?!
--
Helmut Auer, helmut at helmutauer.de
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