java - 七牛分析的视频信息都什么意思？

Question

下面就是视频的信息，个别的我知道什么意思，但是大多数不知道，谁能给解释下？
"streams": [

    {
        "index": 0,
        "codec_name": "h264",
        "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
        "profile": "Baseline",
        "codec_type": "video",
        "codec_time_base": "1/180000",
        "codec_tag_string": "avc1",
        "codec_tag": "0x31637661",
        "width": 640,
        "height": 360,
        "coded_width": 640,
        "coded_height": 368,
        "has_b_frames": 0,
        "sample_aspect_ratio": "0:1",
        "display_aspect_ratio": "0:1",
        "pix_fmt": "yuv420p",
        "level": 30,
        "chroma_location": "left",
        "refs": 1,
        "is_avc": "true",
        "nal_length_size": "4",
        "r_frame_rate": "30/1",
        "avg_frame_rate": "82845000/2759069",
        "time_base": "1/90000",
        "start_pts": 0,
        "start_time": "0.000000",
        "duration_ts": 5518138,
        "duration": "61.312644",
        "bit_rate": "999962",
        "bits_per_raw_sample": "8",
        "nb_frames": "1841",
        "disposition": {
            "default": 1,
            "dub": 0,
            "original": 0,
            "comment": 0,
            "lyrics": 0,
            "karaoke": 0,
            "forced": 0,
            "hearing_impaired": 0,
            "visual_impaired": 0,
            "clean_effects": 0,
            "attached_pic": 0
        },
        "tags": {
            "creation_time": "2016-10-21 08:56:15",
            "language": "eng",
            "handler_name": "VideoHandle"
        }
    },
    {
        "index": 1,
        "codec_name": "aac",
        "codec_long_name": "AAC (Advanced Audio Coding)",
        "profile": "LC",
        "codec_type": "audio",
        "codec_time_base": "1/44100",
        "codec_tag_string": "mp4a",
        "codec_tag": "0x6134706d",
        "sample_fmt": "fltp",
        "sample_rate": "44100",
        "channels": 2,
        "channel_layout": "stereo",
        "bits_per_sample": 0,
        "r_frame_rate": "0/0",
        "avg_frame_rate": "0/0",
        "time_base": "1/44100",
        "start_pts": 0,
        "start_time": "0.000000",
        "duration_ts": 2716351,
        "duration": "61.595261",
        "bit_rate": "123638",
        "max_bit_rate": "96000",
        "nb_frames": "2652",
        "disposition": {
            "default": 1,
            "dub": 0,
            "original": 0,
            "comment": 0,
            "lyrics": 0,
            "karaoke": 0,
            "forced": 0,
            "hearing_impaired": 0,
            "visual_impaired": 0,
            "clean_effects": 0,
            "attached_pic": 0
        },
        "tags": {
            "creation_time": "2016-10-21 08:57:26",
            "language": "eng",
            "handler_name": "VideoHandle"
        }
    }
],
"format": {
    "nb_streams": 2,
    "nb_programs": 0,
    "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
    "format_long_name": "QuickTime / MOV",
    "start_time": "0.000000",
    "duration": "61.594444",
    "size": "8653336",
    "bit_rate": "1123911",
    "probe_score": 100,
    "tags": {
        "major_brand": "isom",
        "minor_version": "0",
        "compatible_brands": "isom3gp4",
        "creation_time": "2016-10-21 08:57:28"
    }
}