code: public CreateTranscodingJobResponse createTranscodingJob(
              String pipelineName, List<SourceClip> clips, String targetKey, String presetName) {
          return createTranscodingJob(pipelineName, clips, targetKey, presetName,
                  null, null);
      }
docs: Creates a new transcoder job which converts media files in BOS buckets with specified preset.
  
  @param pipelineName The name of pipeline used by this job.
  @param clips    The keys of the source media file in the bucket specified in the pipeline.
  @param targetKey    The key of the target media file in the bucket specified in the pipeline.
  @param presetName   The name of the preset used by this job.
  
  @return The newly created job ID.