I run the following from command line:
handbrakeCLI.exe -i SourceFile.mkv -o OutputFile.mkv --stop-at 120
According to the CLIGuide you can supply the --stop-at value as seconds (which is what I want, stop encoding 120 seconds into the file).
My purpose for this is to quickly create a very high quality video clip from a full movie for testing other encoding processes.
However, when I view my output file, it is the entire movie. Any ideas?