how to get (or parse) video and audio codec?

Get codec via ffprobe
```
ffprobe -loglevel fatal -print_format json -show_format -show_streams test/tears-of-steel.mp4 |grep codec_name
            "codec_name": "h264",
            "codec_name": "aac",
```

How to get (or parse) video and audio codec via this package?

