有一项测试的需求是判断录像是否和预期一致，检查项是：分辨率、录像时长等内容
刚开始考虑使用os模块直接获取文件的详细信息
文件的详细信息.png
os模块有一个stat()方法
- st_mode: inode 保护模式
- st_ino: inode 节点号。
- st_dev: inode 驻留的设备。
- st_nlink: inode 的链接数。
- st_uid: 所有者的用户ID。
- st_gid: 所有者的组ID。
- st_size: 普通文件以字节为单位的大小；包含等待某些特殊文件的数据。
- st_atime: 上次访问的时间。
- st_mtime: 最后一次修改的时间。
- st_ctime: 由操作系统报告的"ctime"。在某些系统上（如Unix）是最新的元数据更改的时间，在其它系统上（如Windows）是创建时间。
查看了一下发现它只能获取文件的常规属性
文件的常规属性.png
通过百度后找到了pymediainfo
pymediainfo 安装
1、使用pip安装
pip install pymediainfo
2、下载MediaInfo
点击MediaInfo下载MediaInfo，安装到本地，打开安装所在的路径
获取dll文件.png
将dll文件复制到python更目录下
以上就完成了环境的搭建
开始获取音频文件的详细信息
1.从网上下载一个ts媒体文件
from pymediainfo import MediaInfo
media_info = MediaInfo.parse('C:\\Users\\Administrator\\Desktop\\test.ts')
data = media_info.to_json()
print(data)
更多用法欢迎去pymediainfo的官方文档查找，虽然我没找到
data中就包含了我们所需要的内容，大概长这样，不过里面不知道为什么有很多重复的内容，但是已经满足需求了。
{
"tracks": [
{
"track_type": "General",
"count": "332",
"count_of_stream_of_this_kind": "1",
"kind_of_stream": "General",
"other_kind_of_stream": [
"General"
],
"stream_identifier": "0",
"track_id": 1,
"other_track_id": [
"1 (0x1)"
],
"count_of_video_streams": "1",
"count_of_audio_streams": "1",
"count_of_menu_streams": "1",
"video_format_list": "AVC",
"video_format_withhint_list": "AVC",
"codecs_video": "AVC",
"audio_format_list": "AAC",
"audio_format_withhint_list": "AAC",
"audio_codecs": "AAC LC",
"menu_format_list": "AVC / AAC",
"menu_format_withhint_list": "AVC / AAC",
"menu_codecs": "AVC / AAC LC",
"complete_name": "C:\\Users\\Administrator\\Desktop\\test.ts",
"folder_name": "C:\\Users\\Administrator\\Desktop",
"file_name": "test.ts",
"other_file_name": [
"test"
],
"file_extension": "ts",
"format": "MPEG-TS",
"other_format": [
"MPEG-TS"
],
"format_extensions_usually_used": "ts m2t m2s m4t m4s tmf ts tp trp ty",
"commercial_name": "MPEG-TS",
"internet_media_type": "video/MP2T",
"codec": "MPEG-TS",
"other_codec": [
"MPEG-TS"
],
"codec_extensions_usually_used": "ts m2t m2s m4t m4s tmf ts tp trp ty",
"file_size": 4721808,
"other_file_size": [
"4.50 MiB",
"5 MiB",
"4.5 MiB",
"4.50 MiB",
"4.503 MiB"
],
"duration": "31240.000000",
"other_duration": [
"31 s 240 ms",
"31 s 240 ms",
"31 s 240 ms",
"00:00:31.240",
"00:00:31.240"
],
"overall_bit_rate_mode": "VBR",
"other_overall_bit_rate_mode": [
"Variable"
],
"overall_bit_rate": 1208833,
"other_overall_bit_rate": [
"1 209 kb/s"
],
"file_creation_date": "UTC 2018-08-26 04:05:47.439",
"file_creation_date__local": "2018-08-26 12:05:47.439",
"file_last_modification_date": "UTC 2018-08-26 04:05:49.220",
"file_last_modification_date__local": "2018-08-26 12:05:49.220",
"overallbitrate_precision_min": "1208813",
"overallbitrate_precision_max": "1208852"
},
{
"track_type": "Video",
"count": "344",
"count_of_stream_of_this_kind": "1",
"kind_of_stream": "Video",
"other_kind_of_stream": [
"Video"
],
"stream_identifier": "0",
"streamorder": "0-0",
"track_id": 256,
"other_track_id": [
"256 (0x100)"
],
"menu_id": 1,
"other_menu_id": [
"1 (0x1)"
],
"format": "AVC",
"format_info": "Advanced Video Codec",
"format_url": "http://developers.videolan.org/x264.html",
"commercial_name": "AVC",
"format_profile": "Main@L3.1",
"format_settings": "CABAC / 4 Ref Frames",
"format_settings__cabac": "Yes",
"other_format_settings__cabac": [
"Yes"
],
"format_settings__reframes": 4,
"other_format_settings__reframes": [
"4 frames"
],
"internet_media_type": "video/H264",
"codec_id": "27",
"codec": "AVC",
"other_codec": [
"AVC"
],
"codec_family": "AVC",
"codec_info": "Advanced Video Codec",
"codec_url": "http://developers.videolan.org/x264.html",
"codec_profile": "Main@L3.1",
"codec_settings": "CABAC / 4 Ref Frames",
"codec_settings__cabac": "Yes",
"codec_settings_refframes": "4",
"duration": 31280,
"other_duration": [
"31 s 280 ms",
"31 s 280 ms",
"31 s 280 ms",
"00:00:31.280",
"00:00:31.280"
],
"nominal_bit_rate": 1024000,
"other_nominal_bit_rate": [
"1 024 kb/s"
],
"width": 1280,
"other_width": [
"1 280 pixels"
],
"height": 720,
"other_height": [
"720 pixels"
],
"sampled_width": "1280",
"sampled_height": "720",
"pixel_aspect_ratio": "1.000",
"display_aspect_ratio": "1.778",
"other_display_aspect_ratio": [
"16:9"
],
"frame_rate_mode": "VFR",
"other_frame_rate_mode": [
"Variable"
],
"resolution": 8,
"other_resolution": [
"8 bits"
],
"colorimetry": "4:2:0",
"color_space": "YUV",
"chroma_subsampling": "4:2:0",
"other_chroma_subsampling": [
"4:2:0"
],
"bit_depth": 8,
"other_bit_depth": [
"8 bits"
],
"scan_type": "Progressive",
"other_scan_type": [
"Progressive"
],
"interlacement": "PPF",
"other_interlacement": [
"Progressive"
],
"delay": "1481.000",
"other_delay": [
"1 s 481 ms",
"1 s 481 ms",
"1 s 481 ms",
"00:00:01.481"
],
"delay__origin": "Container",
"other_delay__origin": [
"Container"
],
"writing_library": "x264 - core 148",
"other_writing_library": [
"x264 core 148"
],
"encoded_library_name": "x264",
"encoded_library_version": "core 148",
"encoding_settings": "cabac=1 / ref=1 / deblock=1:0:0 / analyse=0x1:0 / me=dia / subme=2 / psy=0 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=4 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=0 / open_gop=0 / weightp=2 / keyint=75 / keyint_min=25 / scenecut=60 / intra_refresh=0 / rc_lookahead=40 / rc=abr / mbtree=1 / bitrate=1024 / ratetol=1.0 / qcomp=0.40 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=1500 / vbv_bufsize=1500 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00"
},
{
"track_type": "Audio",
"count": "275",
"count_of_stream_of_this_kind": "1",
"kind_of_stream": "Audio",
"other_kind_of_stream": [
"Audio"
],
"stream_identifier": "0",
"streamorder": "0-1",
"track_id": 257,
"other_track_id": [
"257 (0x101)"
],
"menu_id": 1,
"other_menu_id": [
"1 (0x1)"
],
"format": "AAC",
"format_info": "Advanced Audio Codec",
"commercial_name": "AAC",
"format_version": "Version 4",
"format_profile": "LC",
"muxing_mode": "ADTS",
"codec_id": "15",
"codec": "AAC LC",
"other_codec": [
"AAC LC"
],
"duration": 31093,
"other_duration": [
"31 s 93 ms",
"31 s 93 ms",
"31 s 93 ms",
"00:00:31.093",
"00:00:31.093"
],
"bit_rate_mode": "VBR",
"other_bit_rate_mode": [
"Variable"
],
"channel_s": 2,
"other_channel_s": [
"2 channels"
],
"channel_positions": "Front: L R",
"other_channel_positions": [
"2/0/0"
],
"channellayout": "L R",
"samples_per_frame": "1024",
"sampling_rate": 44100,
"other_sampling_rate": [
"44.1 kHz"
],
"samples_count": "1371201",
"frame_rate": "43.066",
"other_frame_rate": [
"43.066 FPS (1024 SPF)"
],
"compression_mode": "Lossy",
"other_compression_mode": [
"Lossy"
],
"delay": "1400.000",
"other_delay": [
"1 s 400 ms",
"1 s 400 ms",
"1 s 400 ms",
"00:00:01.400"
],
"delay__origin": "Container",
"other_delay__origin": [
"Container"
],
"delay_relative_to_video": -81,
"other_delay_relative_to_video": [
"-81 ms",
"-81 ms",
"-81 ms",
"-00:00:00.081"
],
"video0_delay": -81,
"other_video0_delay": [
"-81 ms",
"-81 ms",
"-81 ms",
"-00:00:00.081"
]
},
{
"track_type": "Menu",
"count": "94",
"count_of_stream_of_this_kind": "1",
"kind_of_stream": "Menu",
"other_kind_of_stream": [
"Menu"
],
"stream_identifier": "0",
"streamorder": "0",
"track_id": 4096,
"other_track_id": [
"4096 (0x1000)"
],
"menu_id": 1,
"other_menu_id": [
"1 (0x1)"
],
"format": "AVC / AAC",
"commercial_name": "AVC / AAC",
"codec": "AVC / AAC LC",
"other_codec": [
"AVC / AAC LC"
],
"duration": "31240.000000",
"other_duration": [
"31 s 240 ms",
"31 s 240 ms",
"31 s 240 ms",
"00:00:31.240",
"00:00:31.240"
],
"delay": "1401.000000",
"other_delay": [
"1 s 401 ms",
"1 s 401 ms",
"1 s 401 ms",
"00:00:01.401"
],
"list_streamkind": "1 / 2",
"list_streampos": "0 / 0",
"list": "256 / 257",
"other_list": [
"256 (0x100) (AVC) / 257 (0x101) (AAC)"
],
"service_name": "Service01",
"service_provider": "FFmpeg",
"service_type": "digital television",
"pointer_field": "0",
"section_length": "23"
}
]
}
