Sound only in TV-Preview, picture only when watching in MP (1 Viewer)

[VIXUN]

MediaPortal Version: 1.1 final
MediaPortal Skin: StreamedMP
Windows Version: Windows 7 Home Premium 32bit
CPU Type: AMD X2 240e
HDD: OS: 32 GB Mtron Mobi 3525 SSD, Daten: 1 TB WD Caviar Green
Memory: 4 GB DDR2 RAM
Motherboard: Asus M4A79XTD EVO
Video Card: ATI Radeon HD5450
Video Card Driver: Catalyst 10.7
Sound Card: VIA® VT1708S onboard
Sound Card AC3: optical out
Sound Card Driver: Realtek HD Audio
1. TV Card: FloppyDTV
1. TV Card Type: DVB-C
1. TV Card Driver: BDA
2. TV Card:
2. TV Card Type:
2. TV Card Driver:
3. TV Card: S
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: ffdshow Video Decoder
MPEG2 Audio Codec: ffdshow Audio Decoder
h.264 Video Codec: ffdshow DXVA Video Decoder
Satelite/CableTV Provider: Kabel Deutschland
HTPC Case: Antec Fusion Remote Black
Cooling: Scythe BIG Shuriken
Power Supply: Enermaxx Liberty 350 W
Remote: Logitech Harmony One
TV: Samsung LE 40 B750 UPZX
TV - HTPC Connection: HDMI

Hello

Sorry for the cryptic header, but I didn't know how to describe it better. The problem I am encountering since a couple of days (and I don't know what I changed...) is, that I have sound only when previewing a TV-Channel in the TV-Server-Setup, but picture only when watching TV via MP. Strange, I know. What can be wrong? I know that the sound signal is correctly processed and transmitted to my AVR, because watching other media (movies, series etc.) works just fine.
Does anyone here has an idea what can be wrong?

Thank you very much in advance!

 

[mm1352000]

Hi there

You should always provide logs when submitting support requests!
I'm guessing that the problem is codec related.
Did you install new codecs or media software?
Did you change your codec preferences?