def get_media_info(Bucket, Key, **kwargs)

response = client.get_media_info(
    Bucket=bucket_name,
    Key='demo.mp4'
)
print(response)

{
    'MediaInfo': [{
        'Format': {
            'Bitrate': '16869.432000',
            'Duration': '129.200000',
            'FormatLongName': 'QuickTime / MOV',
            'FormatName': 'mov,mp4,m4a,3gp,3g2,mj2',
            'NumProgram': '0',
            'NumStream': '2',
            'Size': '272441346',
            'StartTime': '0.000000'
        },
        'Stream': {
            'Audio': {
                'Bitrate': '125.712000',
                'Channel': '2',
                'ChannelLayout': 'stereo',
                'CodecLongName': 'AAC (Advanced Audio Coding)',
                'CodecName': 'aac',
                'CodecTag': '0x6134706d',
                'CodecTagString': 'mp4a',
                'CodecTimeBase': '1/44100',
                'Duration': '129.160998',
                'Index': '0',
                'Language': 'und',
                'SampleFmt': 'fltp',
                'SampleRate': '44100',
                'StartTime': '0.000000',
                'Timebase': '1/44100'
            },
            'Subtitle': None,
            'Video': {
                'AvgFps': '30/1',
                'Bitrate': '16738.543000',
                'CodecLongName': 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10',
                'CodecName': 'h264',
                'CodecTag': '0x31637661',
                'CodecTagString': 'avc1',
                'CodecTimeBase': '1/600',
                'Duration': '129.200000',
                'Fps': '30.500000',
                'HasBFrame': '1',
                'Height': '1920',
                'Index': '1',
                'Language': 'und',
                'Level': '40',
                'NumFrames': '3876',
                'PixFormat': 'yuvj420p',
                'Profile': 'High',
                'RefFrames': '1',
                'Rotation': '0.000000',
                'StartTime': '0.000000',
                'Timebase': '1/600',
                'Width': '1080'
            }
        }
    }]
}