File In CHOP
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Summary[edit]
The File In CHOP reads in channel and audio files for use by CHOPs. The file can be read in from disk or from the web. Use http://
when specifying a URL.
Valid Formats
For a complete listing of all valid formats for CHOPs, see the File Types section. The types of files that can be read into CHOPs include:
.chan
- Raw ASCII channel files; a row of numbers per frame. The channels are named automatically..clip .bclip
- TouchDesigner native CHOP clip files..aiff
- Audio files..wav
- Audio files.
Outputting Channel Files
The same files can be output from the RMB menu on the CHOP by selecting Save Data Channels.
Other Input Devices
For MIDI files (.mid
or .midi
), see the MIDI In CHOP.
Parameters - File In Page
Channel File
file
- The name of the file to load. Use http:// when specifying a URL.
Name Options
nameoption
- ⊞ - Use this menu to control the names of the loaded channels.
- Use Names In File
infile
- Use the channel names stored in the file.
- Use New Names
new
- Use the name specified in the Name parameter.
- Use Filename
filename
- Use the filename as the name for the loaded channels.
Name
name
- Used to name the channels when the Name Options parameter is set to Use New Names.
Rate Options
rateoption
- ⊞ - Use this menu to adjust the sample rate of the loaded channels.
- No Change
nochange
- The sample rate is taken from the file.
- Override
override
- The sample rate is set to the number in the Sample Rate parameter, but the channels in the file are not resampled.
- Resample
resample
- Resamples at the specified Sample Rate. Takes the channels and the sample rate found in the file, and resamples it to the desired sample rate. This prevents very large arrays from being used in memory unnecessarily.
Sample Rate
rate
- Samples per second, as utilized by the Rate Options parameter.
Extend Left
left
- ⊞ - The left extend conditions (before/after range).
- No Change
asis
- Leave the channel as is.
- Hold
hold
- Hold the current value of the channel.
- Slope
slope
- Continue the slope before the start of the channel.
- Cycle
cycle
- Cycle the channel repeatedly.
- Mirror
mirror
- Cycle the channel repeatedly, mirroring every other cycle.
- Default Value
default
- Use the constant value specified in the Default Value parameter
Extend Right
right
- ⊞ - The right extend conditions (before/after range).
- No Change
asis
- Leave the channel as is.
- Hold
hold
- Hold the current value of the channel.
- Slope
slope
- Continue the slope after the end of the channel.
- Cycle
cycle
- Cycle the channel repeatedly.
- Mirror
mirror
- Cycle the channel repeatedly, mirroring every other cycle.
- Default Value
default
- Use the constant value specified in the Default Value parameter
Default Value
defval
- The value used for the Default Value extend condition.
Rename to
renameto
- The replacement pattern for the names. The default parameters do not rename the channels. See Pattern Replacement.
Value Override Pattern
overridpattern
- Scopes channels to apply the Override Value to.
Override Value
overridevalue
- The value given to channels scope by the Value Override Pattern parameter above.
Refresh
refresh
- Reload the file when this parameter is set to On.
Refresh Pulse
refreshpulse
- Instantly reload the file from disk.
Parameters - Common Page
Time Slice
timeslice
- Turning this on forces the channels to be "Time Sliced". A Time Slice is the time between the last cook frame and the current cook frame.
Scope
scope
- To determine which channels get affected, some CHOPs use a Scope string on the Common page.
Sample Rate Match
srselect
- ⊞ - Handle cases where multiple input CHOPs' sample rates are different. When Resampling occurs, the curves are interpolated according to the Interpolation Method Option, or "Linear" if the Interpolate Options are not available.
- Resample At First Input's Rate
first
- Use rate of first input to resample others.
- Resample At Maximum Rate
max
- Resample to the highest sample rate.
- Resample At Minimum Rate
min
- Resample to the lowest sample rate.
- Error If Rates Differ
err
- Doesn't accept conflicting sample rates.
Export Method
exportmethod
- ⊞ - This will determine how to connect the CHOP channel to the parameter. Refer to the Export article for more information.
- DAT Table by Index
datindex
- Uses the docked DAT table and references the channel via the index of the channel in the CHOP.
- DAT Table by Name
datname
- Uses the docked DAT table and references the channel via the name of the channel in the CHOP.
- Channel Name is Path:Parameter
autoname
- The channel is the full destination of where to export to, such hasgeo1/transform1:tx
.
Export Root
autoexportroot
- This path points to the root node where all of the paths that exporting by Channel Name is Path:Parameter are relative to.
Export Table
exporttable
- The DAT used to hold the export information when using the DAT Table Export Methods (See above).
Info CHOP Channels
Extra Information for the File In CHOP can be accessed via an Info CHOP.
Common CHOP Info Channels
- start - Start of the CHOP interval in samples.
- length - Number of samples in the CHOP.
- sample_rate - The samplerate of the channels in frames per second.
- num_channels - Number of channels in the CHOP.
- time_slice - 1 if CHOP is Time Slice enabled, 0 otherwise.
- export_sernum - A count of how often the export connections have been updated.
Common Operator Info Channels
- total_cooks - Number of times the operator has cooked since the process started.
- cook_time - Duration of the last cook in milliseconds.
- cook_frame - Frame number when this operator was last cooked relative to the component timeline.
- cook_abs_frame - Frame number when this operator was last cooked relative to the absolute time.
- cook_start_time - Time in milliseconds at which the operator started cooking in the frame it was cooked.
- cook_end_time - Time in milliseconds at which the operator finished cooking in the frame it was cooked.
- cooked_this_frame - 1 if operator was cooked this frame.
- warnings - Number of warnings in this operator if any.
- errors - Number of errors in this operator if any.
TouchDesigner Build:
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