Hi,
Sorry I did not give correct information. <out-file-prefix> is correct and is for demonstrating multi threads:
-t,--num-thread <number> Number of thread to process [Default = 1]
If you set –num-thread 2, you will see test.yuv0 and test.yuv1.
You can customize the naming in
tctx->out_file = new ofstream(out_file_path + to_string(index));