record
The record
command starts recording data. VCR and waveform-audio devices recognize this command.
Although digital-video devices and MIDI sequencers also recognize this command,
the MCIAVI and MCISEQ drivers do not implement it.
wsprintf(lpstrCommand, "record %s %s %s",
lpszDeviceID, lpszRecordFlags,
lpszFlags);
Parameters
lpszDeviceID
Identifier of
an MCI device. This identifier or alias is assigned when the device is opened.
lpszRecordFlags
Flag for
recording data. The following table lists device types that recognize the record
command and the flags used by each type:
|
digitalvideo |
at rectangle |
insert |
|
sequencer |
from position |
overwrite |
|
vcr |
at time |
insert |
|
waveaudio |
from position |
overwrite |
The following
table lists the flags that can be specified in the lpszRecordFlags
parameter and their meanings:
|
at rectangle |
Specifies a
rectangular region of the external input used as the source for the pixels
compressed and saved. If not specified, the rectangle defaults to the
rectangle specified for put
video . When it is set differently from the video rectangle, the displayed
image is not what is recorded. |
|
at time |
Indicates
when the device should begin performing this command, or, if the device has
been cued, when the cued command begins. For more information, see the cue command. |
|
audio
stream stream |
Specifies
the audio stream used for recording. If this flag is not specified and the
file format does not define a default, it is recorded into the stream that is
physically first. |
|
from position |
Specifies a
starting position for the recording. If the from flag is not specified, the
device starts recording at the current position. |
|
hold |
Freezes the
image when recording has finished instead of showing live video. When
recording stops, an automatic monitor file command is performed. To return to live
video, issue the monitor input command. |
|
initialize |
Initialize
the tape (media), which involves recording timecode (if possible) for blank
video and audio. This command might take several hours if the entire tape
must be initialized. |
|
insert |
Specifies
that new data is added to the file at the current position. |
|
overwrite |
Specifies
that new data will replace data in the file. |
|
to position |
Specifies
an ending position for the recording. If the to flag is not specified, the
device records until it receives a stop or pause command. |
|
video
stream stream |
Specifies
the video stream used for recording. If this is not specified and the file
format does not define a default, then it is recorded into the stream that is
physically first. |
lpszFlags
Can be
wait , notify , or both. For digital-video and VCR devices, test can also
be specified. For more information about these flags, see The Wait, Notify,
and Test Flags.
Return Values
Returns zero
if successful or an error otherwise.
Remarks
The recording
stops when a stop
or pause
command is issued. For the MCIWAVE driver, all data recorded after a file is
opened is discarded if the file is closed without saving it.
Before
issuing any commands that use position values, you should set the desired time
format by using the set
command. The tracks to be recorded are specified by the settimecode record , set assemble
record , setvideo
record , and setaudio
record commands.
The following
command starts recording at the current position:
record mysound
See Also