RTSP streams of mpg files are lagging extremely in MediaPortal (1 Viewer)

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TV-Server Version: latest svn build
MediaPortal Version: latest svn build
MediaPortal Skin: blue2
Windows Version: Windows XP SP2
CPU Type: AMD AthlonXP 3000+
HDD: Samsung 200GB
Memory: 512 MB DDR PC3200
Motherboard: Asus A7N8X Deluxe
Motherboard Chipset: Nvidia nforce2
Motherboard Bios: Award 1008
Video Card: WinFast A6600 GT TDH-128 (S-Video out)
Video Card Driver: Forceware
Sound Card: realtek
Sound Card AC3: coaxial out/ optical out
Sound Card Driver: 1.16
1. TV Card: Technisat Skystar 2
1. TV Card Type: DVB-S
1. TV Card Driver: 4.4.0
2. TV Card: Hauppauge Nova-T USB Stick
2. TV Card Type: DVB-T
2. TV Card Driver: 2.5e
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: MPV
MPEG2 Audio Codec: MPA
Satelite/CableTV Provider: Astra 19.2°E
HTPC Case: standard ATX case
Cooling:
Power Supply: Bequite 400W
Remote: Microsoft MCE Remote
TV: Panasonic 16:9
TV - HTPC Connection: S-Video

In current SVN, all RTSP streams which are created from an mpg file
x either MyTV -> TV-Streams -> play a in progress scheduled recording
x or MyTV -> recordings -> play any recorded mpg file
are unwatchable because of extreme stuttering audio and video.

But when you connect to the same stream with VLC, it plays fine.

Different codecs have been tested. no change.

Steps to reproduce:
- recording format mpg
- a scheduled recording has to be in progress
- tested with dvb, no clue how analog behaves

1. start MediaPortal -> enter MyTV
2. go TV-Streams -> select the in progress scheduled recording
3. MyTV goes fullscreen and video/audio shows extreme stuttering
4. connect to the same stream with VLC -> plays very smooth

 

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has been confirmed by rtv and broce ->mantis1048<-