nutmeg 2017.7.30

Simple video processing tools using Python with fmpeg

# NutMeg

A collection of simple video processing tools. Nice Python classes and functions
that wrap practical predefined ffmpeg commands.


## Example NutmegClip

```python
f = '/home/Videos/GoPro/Malibu/GOPR6248.MP4'

p = NutmegProbe()
p.probe(f)

print('\nOriginal file: {}'.format(os.path.basename(f)))
print('Original duration: {}'.format(p.results.container.duration))

time_start = 0
time_stop = 0.5*p.results.container.duration

c = NutmegClip()
c.clip(f, time_start, time_stop)

print('\nClip file: {}'.format(os.path.basename(c.results.fname_out)))

p = NutmegProbe()
p.probe(c.results.fname_out)

print('Clip duration: {}'.format(p.results.container.duration))

```

The above example yields the following output:

```text
Original file: GOPR6248.MP4
Original duration: 40.323617

Clip file: GOPR6248.clip-0.00-20.16.mp4
Clip duration: 20.182

```


## Example NutmegProbe

```python
f = '/home/Videos/GoPro/Malibu/GOPR6248.MP4'

p = NutmegProbe()
p.probe(f)

print('\nContainer:')
IPython.display.display(p.results.container)

for s in p.results.streams:
print('\nStream {}:'.format(s.index))
IPython.display.display(s)
```

Running the above sample code yields the following output:

Container:
```python
{'bit_rate': '24243114',
'duration': '40.323617',
'filename': '/home/Videos/GoPro/Malibu/GOPR6248.MP4',
'format_long_name': 'QuickTime / MOV',
'format_name': 'mov,mp4,m4a,3gp,3g2,mj2',
'nb_programs': 0,
'nb_streams': 3,
'probe_score': 100,
'size': '122196256',
'start_time': '0.000000',
'tags': {'compatible_brands': 'avc1isom',
'creation_time': '2014-07-06T15:20:02.000000Z',
'major_brand': 'avc1',
'minor_version': '0'}}
```

Stream 0:
```python
{'avg_frame_rate': '60000/1001',
'bit_rate': '23967131',
'bits_per_raw_sample': '8',
'chroma_location': 'left',
'codec_long_name': 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10',
'codec_name': 'h264',
'codec_tag': '0x31637661',
'codec_tag_string': 'avc1',
'codec_time_base': '1001/120000',
'codec_type': 'video',
'coded_height': 1080,
'coded_width': 1920,
'color_primaries': 'bt709',
'color_range': 'pc',
'color_space': 'bt709',
'color_transfer': 'bt709',
'display_aspect_ratio': '16:9',
'disposition': {'attached_pic': 0,
'clean_effects': 0,
'comment': 0,
'default': 1,
'dub': 0,
'forced': 0,
'hearing_impaired': 0,
'karaoke': 0,
'lyrics': 0,
'original': 0,
'visual_impaired': 0},
'duration': '40.323617',
'duration_ts': 2419417,
'has_b_frames': 1,
'height': 1080,
'index': 0,
'is_avc': 'true',
'level': 42,
'nal_length_size': '4',
'nb_frames': '2417',
'pix_fmt': 'yuvj420p',
'profile': 'Main',
'r_frame_rate': '60000/1001',
'refs': 1,
'sample_aspect_ratio': '1:1',
'start_pts': 0,
'start_time': '0.000000',
'tags': {'creation_time': '2014-07-06T15:20:02.000000Z',
'encoder': 'GoPro AVC encoder',
'handler_name': '\rGoPro AVC',
'language': 'eng',
'timecode': '15:19:06:51'},
'time_base': '1/60000',
'width': 1920}
```

Stream 1:
```python
{'avg_frame_rate': '0/0',
'bit_rate': '128040',
'bits_per_sample': 0,
'channel_layout': 'stereo',
'channels': 2,
'codec_long_name': 'AAC (Advanced Audio Coding)',
'codec_name': 'aac',
'codec_tag': '0x6134706d',
'codec_tag_string': 'mp4a',
'codec_time_base': '1/48000',
'codec_type': 'audio',
'disposition': {'attached_pic': 0,
'clean_effects': 0,
'comment': 0,
'default': 1,
'dub': 0,
'forced': 0,
'hearing_impaired': 0,
'karaoke': 0,
'lyrics': 0,
'original': 0,
'visual_impaired': 0},
'duration': '40.320000',
'duration_ts': 1935360,
'index': 1,
'nb_frames': '1890',
'profile': 'LC',
'r_frame_rate': '0/0',
'sample_fmt': 'fltp',
'sample_rate': '48000',
'start_pts': 0,
'start_time': '0.000000',
'tags': {'creation_time': '2014-07-06T15:20:02.000000Z',
'handler_name': '\rGoPro AAC',
'language': 'eng',
'timecode': '15:19:06:51'},
'time_base': '1/48000'}
```

Stream 2:
```python
{'avg_frame_rate': '60/1',
'codec_tag': '0x64636d74',
'codec_tag_string': 'tmcd',
'codec_type': 'data',
'disposition': {'attached_pic': 0,
'clean_effects': 0,
'comment': 0,
'default': 1,
'dub': 0,
'forced': 0,
'hearing_impaired': 0,
'karaoke': 0,
'lyrics': 0,
'original': 0,
'visual_impaired': 0},
'duration': '40.323617',
'duration_ts': 2419417,
'index': 2,
'nb_frames': '1',
'r_frame_rate': '0/0',
'start_pts': 0,
'start_time': '0.000000',
'tags': {'creation_time': '2014-07-06T15:20:02.000000Z',
'language': 'eng',
'timecode': '15:19:06:51'},
'time_base': '1/60000'}
```