Parse FFMPEG streams with square brackets

[B3QL]

Hikvisions CCTV recordings use custom codec which causes FFMPEG
to return stream "value" in square brackets.

Original FFMPEG issue:
https://trac.ffmpeg.org/ticket/3566

Sample files:
https://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket4182/

• I have provided code that clearly demonstrates the bug and that only works correctly when applying this fix
• I have added suitable tests demonstrating a fixed bug or new/changed feature to the test suite in tests/
• I have properly documented new or changed features in the documentation or in the docstrings
• I have properly explained unusual or unexpected code in the comments around it

[coveralls]

Coverage increased (+0.08%) to 84.865% when pulling 7b98b02 on TraseeHQ:b/handle-hikvision-codec into 025c3fe on Zulko:master.

[B3QL]

@mondeja can you take a look? This should be a quick one ;) Thanks!

[mondeja]

Great, but in this case the language key of streams has no sense anymore:

{'audio_found': True,
 'bitrate': 266,
 'default_video_input_number': 0,
 'default_video_stream_number': 0,
 'duration': 135.0,
 'inputs': [{'input_number': 0,
             'streams': [{'bitrate': None,
                          'default': True,
                          'fps': 25.0,
                          'input_number': 0,
                          'language': '0x1e0',
                          'stream_number': 0,
                          'stream_type': 'video'},
                         {'bitrate': None,
                          'default': False,
                          'fps': 'unknown',
                          'input_number': 0,
                          'language': '0x1c0',
                          'stream_number': 1,
                          'stream_type': 'audio'}]}],
 'metadata': {},
 'start': 52874.498178,
 'video_bitrate': None,
 'video_duration': 135.0,
 'video_found': True,
 'video_fps': 25.0,
 'video_n_frames': 3375,
 'video_size': None}

Could you handle it, please? Also, would you mind to add a CHANGELOG entry? Thanks!

---

Attaching the sample just in case we need in the future:

Sample

Sample.mp4

[B3QL]

Could you handle it, please? Also, would you mind to add a CHANGELOG entry? Thanks!

Done! Should I add an extra test for it or extend the test_stream_square_brackets will be sufficient?

[mondeja]

Awesome, thank you! 👍🏼