Operations like this are done by writing a so-called “stitch.xml” file and load it into the Atmos Conversion Tool. By clicking on “Start converting” the stitch.xml file will be executed and a continuous master will be created as the output. It´s possible to do a framerate and/or format conversion at the same time.
As a starting point you should use the example file act_reels_stitch.xml attached to this article. Similar example files are included with the Atmos Conversion Tool installer, you will find them at /Applications/Dolby/Dolby Atmos Conversion Tool/Examples/ (Mac) or C:\Program Files\Dolby\Dolby Atmos Conversion Tool\Examples (PC).
Stitch.xml files can be opened and edited in any text editor.
In the example file you´ll find two “sources”. Every reel of your film will be one source. You can add more sources by copy-pasting the text block starting with <source> and ending with </source>.
Every source has four parameters associated to it, which you need to edit to create a valid stitch file:
<path> Here you need to provide the full file path of each source master file (“reel”). Master files can be in the format .atmos, ADM.wav,.rpl or .mxf.
<sourceStart> This is the timecode of the “First Frame of Action”, aka the timecode where the reel starts. Typically, reels start at the full hour or at 8 seconds if there´s a technical leader.
<outputStart> This is the timecode where the reel will start in the final, continuous feature. The first reel will typically start at 00:00:00:00 or at the full hour 01:00:00:00. All following reels should start exactly at the end of the previous reel. For example, if reel 1 ends at TC 01:20:30:05, reel 2 should start at this timecode.
<outputEnd> This is the timecode where the reel ends. This line is optional. Without this line, the start of the next reel automatically defines the end of the previous reel.
A few things to note:
- All commands in the stitch file are case-sensitive.
- Make sure that the <framerate> matches your original content. The tool doesn´t support stitching master files with different framerates.
- You have to define one master to be the “primary source”. This is indicated by the text <source primary=”true”>. Certain global metadata information is taken from the “primary master” and copied to the output file. Refer to the Dolby_Atmos_Conversion_Tool_v1.9_Software_Guide for more information.