processed/<job>/ and originals are archived under originals/<job>/.mp3_image_to_mp4 combines one audio file plus one image into a still-image H.264 MP4.to_h264_mp4 converts supported video files to H.264 MP4.transcribe_audio creates a transcript .txt and captions .srt from audio/video files..mov, .mp4, .m4v..mp3 plus .jpg or .png.