User Manual v.1
QVidium
®
QVDEC4K™ UHD/HEVC Video Decoder
Copyright 2023 QVidium
®
Technologies, Inc.
Page 15 of 34
2.2.1 Basic Decoding Parameters
All the basic parameters you normally would need to set when creating a new decoding profile are
grouped together under the
Decoder
menu when editing or creating a profile, as shown in Figure
2, above. Below is a list of the basic decoding parameters and a short description for each setting:
Video Output: 2160p60, 2160p59.94, 2160p50, 2160p30, 2160p29.97, 2160p25, 2160p24,
2160p23.98; 1080p60, 1080p59.94, 1080p50, 1080p30, 1080p29.97, 1080p25, 1080p24,
1080p23.98; 1080i59.94, 1080i50; 720p60, 720p59.94, 720p50
. Default is
1080p59.94
. The
Video Output
setting scales the raw SDI output video to the selected resolution and frame
rate, regardless of the decoded video resolution and frame rate.
Audio Stream: Auto
,
1, 2, 3,
and
4
. Default is
Auto
. When in
Auto
, the QVDEC4K will decode all
of the Opus, AAC, or MPeg1/2 audio channels contained within the stream. Setting this to a
value from 1 to 4 allows you to select only that audio stream for decoding to the embedded
SDI output.
AC-3 Audio: Pass-through
or
Decode
. Default is
Pass-through
. This setting only applies when
the decoded audio/video stream contains AC-3 or Enhanced AC3 (aka., E-AC3 or Dolby-Plus).
For AC-3 audio, the QVDEC4K can decode the audio. However when encountering E-AC3,
the QVDEC4K can only pass-through the Dolby-encoded audio unchanged, and the "Decode"
option does not apply.
Downmix Audio: No
or
Yes
. Default is
No
. This setting only applies when the audio embedded
within the stream is AC-3 or AAC Surround-Sound with more than 2 channels. Setting this to
Yes
will process the multiple audio channels by mixing the audio to output a single stereo
output. This is particularly useful when the playback device can only output a left and right
audio pair.
Main Feed:
No default. This is the primary configuration for the decoder whereby the user can
select the IP
Transport
and the parameters associated with the selected IP Transport. The
QVDEC4K supports the following IP video transport protocols: SRT, RIST (main and simple
profiles), QVidium ARQ, HTTP (aka. HLS), RTSP, UDP, or file playback. Additional fields,
such as Encryption parameters, UDP port or URL string, server IP address for Caller (Pull)
Mode, etc. appear as appropriate for the IP transport mode that you select. As an example, the
settings for SRT are shown below in Figure 3: