[Mplayer-dvb] Choppy audio with NTSC data

[André Weidemann]

Hi Arpi,
I have a similar problem with a quicktime movie...
It's encoded at 30fps with 22000Hz sound.
It plays well under X but playing it with the following option
"mplayer -speed 30:25 -ao mpegpes -vo mpegpes -vop 
expand=-1:576:-1:-1:3,scale=720:0,dvbscale" is no fun listening to.
The sound is choppy all the way through when playing it on the DVB card.
The -speed option actually makes no difference.
I'm curious as well... Why should the sound become choppy if frames are 
droped?
There is something else I'm interested in. Before transcoding the 
movie.. Does mplayer analyse the stream? Sometimes CPU usage goes up to 
100% on a scene cut (I-frame?!) and after 2 seconds it plays well again.

André.

Arpi wrote:
> Hi,
> 
> this way you play your 30fps video at 25fps, ie slower, but since teh audio
> plays at original rate, it gets choppy.
> 
> try -speed 25:30
> but it will lower the tone of audio too... >
> 
>>Hi!
>>
>>I'm trying to play back an NTSC VCD on my non-NTSC capable TV-Set. Of
>>course, passing the MPEG data through to the DVB's MPEG decoder results in
>>ok sound and a black&white picture which is not what I want. So I use the
>>command line
>>
>>-vo mpegpes -ao mpegpes -vop lavc,expand=352:576,scale=352:523 -framedrop
>>
>>to have the video rescaled so I get a nicely colored picture. But with these
>>settings the sound is very choppy and I did not find a way to fix that. When
>>playing the sound directly via the sound card it is not choppy but way out
>>of sync which is not the case with -ao mpegpes.
>>
>>Also a reason why I think it should work is that with the same settings
>>(except for scaling) I can play a PAL SVCD just fine, so I do not think that
>>my machine (1GHz Duron) is too slow as it usually runs at 40% CPU usage
>>during playback.
>>
>>Any ideas?
>>
>>Stefan
>>
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>>Mplayer-dvb at mplayerhq.hu
>>http://mplayerhq.hu/mailman/listinfo/mplayer-dvb
>>
>>
> 
> 
> 
> A'rpi / Astral & ESP-team
> 
> --
> Developer of MPlayer, the Movie Player for Linux - http://www.MPlayerHQ.hu
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