video format

./ffprobe -print_format json -show_format -show_streams -i ../java01/01.mp4

新东方flv格式

```json
{
    "streams": [
        {
            "index": 0,
            "codec_name": "h264",
            "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
            "profile": "High",
            "codec_type": "video",
            "codec_time_base": "1/50",
            "codec_tag_string": "[0][0][0][0]",
            "codec_tag": "0x0000",
            "width": 1280,
            "height": 720,
            "coded_width": 1280,
            "coded_height": 720,
            "has_b_frames": 1,
            "sample_aspect_ratio": "1:1",
            "display_aspect_ratio": "16:9",
            "pix_fmt": "yuv420p",
            "level": 40,
            "chroma_location": "left",
            "field_order": "progressive",
            "refs": 1,
            "is_avc": "true",
            "nal_length_size": "4",
            "r_frame_rate": "25/1",
            "avg_frame_rate": "25/1",
            "time_base": "1/1000",
            "start_pts": 40,
            "start_time": "0.040000",
            "bits_per_raw_sample": "8",
            "disposition": {
                "default": 0,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0
            }
        },
        {
            "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": "[0][0][0][0]",
            "codec_tag": "0x0000",
            "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": "1/1000",
            "start_pts": 0,
            "start_time": "0.000000",
            "disposition": {
                "default": 0,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0
            }
        }
    ],
    "format": {
        "filename": "../koolearn/2018kysxqhgs01.flv",
        "nb_streams": 2,
        "nb_programs": 0,
        "format_name": "flv",
        "format_long_name": "FLV (Flash Video)",
        "start_time": "0.000000",
        "duration": "872.536000",
        "size": "27235681",
        "bit_rate": "249715",
        "probe_score": 100,
        "tags": {
            "moovPosition": "44",
            "avcprofile": "100",
            "avclevel": "40",
            "aacaot": "2",
            "videoframerate": "25",
            "audiochannels": "2",
            "language": "und",
            "length": "38478848",
            "timescale": "44100",
            "sampletype": "mp4a"
        }
    }
}
```


七牛ts格式

```json
{
    "streams": [
        {
            "index": 0,
            "codec_name": "h264",
            "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
            "profile": "High",
            "codec_type": "video",
            "codec_time_base": "1/60",
            "codec_tag_string": "[27][0][0][0]",
            "codec_tag": "0x001b",
            "width": 1920,
            "height": 1080,
            "coded_width": 1920,
            "coded_height": 1088,
            "has_b_frames": 2,
            "sample_aspect_ratio": "1:1",
            "display_aspect_ratio": "16:9",
            "pix_fmt": "yuv420p",
            "level": 40,
            "chroma_location": "left",
            "field_order": "progressive",
            "refs": 1,
            "is_avc": "false",
            "nal_length_size": "0",
            "id": "0x100",
            "r_frame_rate": "30/1",
            "avg_frame_rate": "30/1",
            "time_base": "1/90000",
            "start_pts": 132000,
            "start_time": "1.466667",
            "duration_ts": 167013000,
            "duration": "1855.700000",
            "bits_per_raw_sample": "8",
            "disposition": {
                "default": 0,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0
            }
        },
        {
            "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": "[15][0][0][0]",
            "codec_tag": "0x000f",
            "sample_fmt": "fltp",
            "sample_rate": "44100",
            "channels": 2,
            "channel_layout": "stereo",
            "bits_per_sample": 0,
            "id": "0x101",
            "r_frame_rate": "0/0",
            "avg_frame_rate": "0/0",
            "time_base": "1/90000",
            "start_pts": 126000,
            "start_time": "1.400000",
            "duration_ts": 166980962,
            "duration": "1855.344022",
            "bit_rate": "132644",
            "disposition": {
                "default": 0,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0
            },
            "tags": {
                "language": "und"
            }
        }
    ],
    "format": {
        "filename": "../java01/01.mp4",
        "nb_streams": 2,
        "nb_programs": 1,
        "format_name": "mpegts",
        "format_long_name": "MPEG-TS (MPEG-2 Transport Stream)",
        "start_time": "1.400000",
        "duration": "1855.766667",
        "size": "238265184",
        "bit_rate": "1027134",
        "probe_score": 50
    }
}
```