Capture/Encoding Property Page
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The encoding page will appear different depending on the configuration of the product being used. Screen shots are shown for the different configurations that are possible. In both configurations, if the computer has a DV port, it can also be used to capture the video. The software encoder would of course be used for the DV capture option.
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· | Video Source is for those systems that support more than one type of input connector, this option specifies which video connectors to capture from.
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· | Composite - RCA type connector, usually colored yellow.
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· | S-Video - standard S-Video source.
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· | RGB - component RGB source.
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· | YUV - component YUV source.
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· | SDI - digital SDI source.
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· | DV - IEEE 1394 port.
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· | Audio Input is used by those systems which support more than one audio connector.
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· | Line In - this input is the unbalanced line level source. This connector is typically a 1/8" diameter phone plug connecter.
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· | Balanced - this input is balanced source. This connector is typically an XLR type connector. In fact for stereo audio, there should be two XLR connectors.
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· | AES - digital AES source
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· | Embedded AES - digital AES audio embedded with the SDI video signal. In this case, both the audio and video will be coming in on the SDI video connector.
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· | Video Aspect Ratio for capture cards that support it is used to specify the aspect ratio of the video source.
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· | Bitrate - the MPEG-2 video encoder can be configured to use a constant bit rate encoder or a more advanced variable bit rate encoder. The variable bit rate encoder will typically produce better results than the constant bit rate encoder but the file sizes may be slightly less deterministic.
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· | Audio Algorithm - specifies the encoder to be used on the audio stream. This option may be set to be set to MPEG audio but in virtually all cases, will be set to AC3. The default DVD bitrate for stereo (two-channel) Dolby Digital is 192 kbits/sec. The bitrate can be set as high as 640 kbits/sec.
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· | Bitrate Computation
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· | Auto - this option will usually be used which will automatically compute the optimal bitrate for the DVD length selected. The maximum value that will be used for the target bitrate is 8000 kbps. If a higher bitrate is desired, the manual bitrate computation method should be chosen.
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· | Manual - this option is chosen only when the user requires a specific bitrate or if they wish to exceed 8000 kbps.
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· | Configure Resize...
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· | Top Field First - this option is not always visible because it only applies to the software encoder. When using the software encoder, you can speify the field ordering. If this option is not set to match the source, the video may appear to be jumpy when there is motion.
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