digitalvideo

algorithm algorithm
alignment to integer
bass to factor
bitspersample to bit_count
bytespersec to integer
clocktime
input
left off
left on
left volume to factor
off
on
output

over duration
quality descriptor
record off
record on
right off
right on
right volume to factor
samplespersec to integer
source to sourcename
stream to number
treble to factor
volume to factor

vcr

off
on
monitor to type number number
record off
record track track_number off

record on
record track track_number on
source to type number number
track track_number off
track track_number on

algorithm algorithm

Selects a specific audio compression algorithm for use by a subsequent reserve203GP5 or recordO3IFU command. The algorithms supported are device specific.

MCI defines the values  g711 ,  g721 ,  g722 ,  g728 ,  pcm ,  cdxa ,  adpcm , and  adpcm4e  for algorithm. If a device supports the algorithm names  pcm ,  cdxa , and  adpcm4e , they adhere to standard definitions. The  cdxa  algorithm has been defined by Sony Corporation. The  adpcm4e  algorithm has been defined by Intel Corporation. The  g711 ,  g721 ,  g722 , and  g728  values represent audio algorithms recommended by the International Telegraph and Telephone Consultative Committee (CCITT).

If the specified algorithm conflicts with the current file format, the file format is changed to the default format for the algorithm.

alignment to integer

Sets the alignment of data blocks relative to the start of input waveform-audio data.

bass to factor

Sets the audio low frequency level.

bitspersample to bit_count

Sets the number of bits per sample recorded. The file is saved in this format. This flag applies only to devices supporting the  pcm  algorithm.

bytespersec to integer

Sets the average number of bytes per second for recording in the  pcm  and  adpcm  algorithms. The file is saved in this format.

clocktime

Indicates the time specified in the  over  flag is in milliseconds. This time is absolute and not in step with the playing of the workspace.

input

Modifies the  bass ,  treble , or  volume  flag so that it affects the input signal and modifies what is recorded. If possible, this is the default when monitoring the input.

left off
left on

Enables or disables audio output on the left channel. The audio presentation source can be the external input or the workspace. The default is  left on . If there is only one channel, that channel is set on or off.

left volume to factor

Sets the audio volume of the left audio channel. If there is only one channel it sets its volume.

monitor to type number number

Controls which source input will be passed to the VCR output without changing the recording source input selection. Type can be  output,  or one of the valid input sources. If number is not specified, then the first input of that type will be chosen.

off
on

Enables or disables audio. The audio presentation source can either be the external input or the workspace. This command affects the left and right audio channels simultaneously. The default is setaudio  on .

output

Modifies the  bass ,  treble , or  volume  flag so that it modifies only the played signal and not what is recorded. If possible, this is the default when monitoring a file.

over duration

Specifies how long it should take to make a change that uses a factor variable. The units for duration are in the current time format. Changes occur in step with the playing of the workspace. When playing is suspended, the change is also suspended until the play continues. If  over  is not specified or not supported, the change occurs immediately.

quality descriptor

Specifies the characteristics of the audio compression performed when audio is recorded to a file. All devices support the three descriptors  low ,  medium , and  high . The default is device specific.

If the  algorithm  flag is not specified, the  quality  adjustment applies to the current algorithm.

The qualityBN8V4O command can be used to define additional descriptor names.

record off

Clears the audio-source selection so that no audio will be recorded with the next recordO3IFU command.

record on

Enables recording of audio data. The default is to record audio data.

record track track_number off

Clears the audio-source selection so that no audio will be recorded with the next recordO3IFU command.  Track  allows independent track selection. Track 2 corresponds to the PCM track in Hi8. If  track  is not specified, a default value of 1 is assumed.

record track track_number on

Selects the audio source to be recorded with the next record command.  Track  allows independent track selection. Track 2 corresponds to the PCM track in Hi8. If  track  is not specified, a default value of 1 is assumed.

right off
right on

Enables or disables audio output on the right channel. The audio presentation source can be the external input or the workspace. The default is  right on . If there is only one channel, this flag has no effect.

right volume to factor

Sets the audio volume to the right audio channel. If there is only one channel, it has no effect.

samplespersec to integer

Sets the sample rate for recording with the  pcm  and  adpcm  algorithms. The file is saved in this format.

source to sourcename

Specifies the source for the audio input digitizer. The constants defined for sourcename include:  left ,  right ,  average , and  stereo . The first three specify monophonic recording using the left input only, the right input only, and the average of the two inputs.

source to type number number

Selects the audio source to be recorded on the tape. Type must be  tuner ,  line ,  svideo ,  aux ,  generic , or  mute .

stream to number

Specifies the audio stream played back from the workspace. If the stream is not specified and the file format does not define a default, then the interleaved audio stream that is physically first will be played.

track track_number off

Disables an individual track.

track track_number on

Enables an individual track.

treble to factor

Sets the audio high-frequency level.

volume to factor

Sets the average audio volume for both audio channels. If the left and right volumes have been set to different values, then the ratio of left-to-right volume is approximately unchanged.