Convert to RGB Channel
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The Convert to RGB Channel dialog enables you to convert existing channels into RGB channels. You can open the Convert to RGB Channel dialog by right-clicking on a channel's button, and selecting "Convert to RGB Channel" from the popup menu. The RGB channel that is created by the dialog will be placed at the erstwhile location of the channel that you click on, and (by default) will use that channel as its red constituent channel, and the immediately following channels (if any) as its green and blue constituent channels.
The Convert to RGB Channel dialog
The RGB Channel Name field allows you to specify the name of the RGB channel to be created; by default, it will be the same as the name of the channel that you clicked on. The names of the constituent channels will be changed to reflect the name of the RGB channel; for example, if you name the RGB channel "My RGB", then its red, green, and blue constituent channels will be renamed "My RGB (R)", "My RGB (G)", and "My RGB (B)", respectively.
The three component channel dropdown lists allow you to specify the existing channels to use as the component channels. Also, the top entry in each list, "Add a new channel", allows you to say that an entirely new channel should be created and used as that component channel, rather than using an existing channel. By default, the red channel will be the channel that you clicked on, the green channel will be the channel following that, and the blue will be the channel following that.
If the "Also do this for following channels" box is checked, you can specify a number of RGB channels to create (otherwise, only one will be created). The dialog will try to create as many as you specify, using succeeding channels from the track. Exactly which channels are used depends upon the relationship between the three channels that you specify in the "Component Channels" section:
The first mode is intended to support sequences whose channels are currently set up in the order R, G, B, R, G, B, R, G, B, and so on. So, if the specified green channel immediately follows the specified red channel, and the specified blue channel immediately follows the specified green channel, then the next RGB channel will be created from the three channels following those (as R, G, and B, respectively), and the RGB channel after that from the three channels following those, and so on. If this causes the dialog to run out of channels before creating the number of RGB channels that you requested (either due to reaching the end of the track or due to reaching an existing RGB channel instead of a channel), it will stop, and warn you that it was only able to create less RGB channels than you had requested.
The other mode is intended to support sequences whose channels are currently set up in the order R, R, R, ..., G, G, G, ..., B, B, B, .... So, if the specified green channel does not immediately follow the specified red channel, or the specified blue channel does not immediately follow the specified green channel, then the next RGB channel will consist of the channel following the specified red channel as its red channel, the channel following the specified green channel as its green channel, and the channel following the specified blue channel as its blue channel. Again, if this causes it to run out of channels before creating the requested number of RGB channels (either due to the conditions listed previously or else due to reaching a channel that has already been used), it will stop, and warn you that it created less than you asked for.