User`s manual

User’s Manual v.16 QVidium

H.264 HD Video Codecs™

Technologies, Inc. Page 52 of 72

Known Problems

The following problems are currently known to exist:

Encoder:

 Scaling from 1080i input to Half-D1 or CIF resolutions on the encoder in MPEG2

encoding is not supported.

 Glitches in the SDI input (seen when SDI Error light blinks) can cause problems during

decoding unless ResyncSDI is enabled. With ResyncSDI enabled, a glitch in the SDI

input will cause a brief disruption in the stream.

Decoder:

 Genlock may initially cause the output frequency to drift away from the actual

frequency until the Genlock mechanism acquires a lock on the signal, possibly causing

some video artifacts during startup. A work-around is to set the Genlock setting to

Strict or Off.

Transcoding:

1. Is no longer supported, but is available upon request.

2. For QVENC: ASI to IP & IP to ASI only with the optional ASI daughter card.

3. For QVDEC: ASI input is not supported for decoding, must use QVPRO.

4. Support for IP to IP on the QVENC upon request.