ugly loop

    for thread in range(1, total_threads + 1):
        new_lossless = lossless.replace('[NUM]', str(thread))
        joined_avs.write('tmp = FFVideoSource("{0}",colorspace="YV12_10-bit_hack",track=-1,pp="")\n'.format(new_lossless))
        if(thread == 0):
            if(total_threads == 1):
                #first and only thread
                joined_avs.write('total1 = tmp\n')
            else:
                #first thread
                joined_avs.write('total1 = tmp.Trim(0,tmp.FrameCount() - 51)\n')
        elif(thread == total_threads - 1):
            #final thread
            joined_avs.write('total1 = total1 + tmp.Trim(51,tmp.FrameCount())\n')
        else:
            joined_avs.write('total1 = total1 + tmp.Trim(51,tmp.FrameCount() - 51)\n')