RDD25 Proxy

The RDD25 format is often used if it comes to bandwidth preview videos that support growing processing. A suitable ShapeTag usable can be find below. Typical points to consider here are:

H.264 Video Codec
AAC Audio Codec
Usage of Index files recommended when used with Vidispine Frontends
Open/Incomplete Header for growing support required
Bandwidth and Resolution should be as low as possible for proper performance and as high as possible for best visual quality. It’s a trade off decision per system.
The Aspect Ratio and the resulting resolution are free to choose
The Frame rate is free to choose but must be constant
Baseline Preset is recommended to ensure B-Frames are not part of GOP which can be problematic when using it inside web browsers.
48kHz Audio is recommended when using it with Vidispine frontends to avoid sample rate conversion and improve performance.

ShapeTag:

XML

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<TranscodePresetDocument xmlns="http://xml.vidispine.com/schema/vidispine">
    <description>Proxy_RDD25</description>
    <name></name>
    <format>mxf_nablet</format>
    <audio>
        <codec>nablet_aac</codec>
        <framerate>
            <numerator>1</numerator>
            <denominator>48000</denominator>
        </framerate>
        <stream>2</stream>
    </audio>
    <video>
        <scaling>
            <width>960</width>
            <height>540</height>
        </scaling>
        <codec>h264</codec>
        <bitrate>4000000</bitrate>
        <framerate>
            <numerator>1</numerator>
            <denominator>25</denominator>
        </framerate>
        <preset>baseline</preset>
        <setting>
            <key>level_id</key>
            <value>31</value>
        </setting>
        <setting>
            <key>nablet_hdr_preset</key>
            <value>CIP_BT709</value>
        </setting>
        <setting>
            <key>nablet_hdr_source_colorRange</key>
            <value>1</value>
        </setting>
        <setting>
            <key>colorRange</key>
            <value>1</value>
        </setting>
    </video>
    <metadata>
        <field>
            <key>V3_GUID</key>
            <value>ff635abf-dedf-72bb-30c7-d34b3a30d0f4</value>
        </field>
        <field>
            <key>V3_DisplayName</key>
            <value>Proxy_RDD25</value>
        </field>
    </metadata>
    <script></script>
    <muxerSetting>
        <key>nablet_muxing_mode</key>
        <value>Afn100</value>
    </muxerSetting>
    <muxerSetting>
        <key>MXF_MUX_FLAG_KEEP_HEADER_INCOMPLETE</key>
        <value>true</value>
    </muxerSetting>
    <muxerSetting>
        <key>MXF_MUX_FLAG_KEEP_HEADER_OPEN</key>
        <value>true</value>
    </muxerSetting>
    <muxerSetting>
        <key>MXF_MUX_FLAG_DO_NOT_FINALYZE_HEADER</key>
        <value>true</value>
    </muxerSetting>
    <muxerSetting>
        <key>MXF_MUX_FLAG_DO_NOT_FINALYZE_BODIES</key>
        <value>false</value>
    </muxerSetting>
</TranscodePresetDocument>

Instead of “Afn100” muxing mode “RDD25” is also possible.

New in 25.1

The muxer settings MXF_MUX_FLAG_* can be omitted because they are set up appropriately, according to the muxing mode.