我一直在挖掘mplayer/mencoder和ffmpeg文档,我似乎无法想出任何东西.我对输出格式并不是特别挑剔,因为我可以使用正则表达式将其拉出来,我似乎无法在第一时间获取数据.
使用ffprobe(FFmpeg工具包的一部分)
例:
ffprobe -v quiet -print_format json -show_format -show_streams ~/Movies/big_buck_bunny_720p_5mb.mp4
输出:
{
"streams": [
{
"index": 0,
"codec_name": "h264",
"codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
"profile": "Main",
"codec_type": "video",
"codec_time_base": "1/50",
"codec_tag_string": "avc1",
"codec_tag": "0x31637661",
"width": 1280,
"height": 720,
"coded_width": 1280,
"coded_height": 720,
"has_b_frames": 0,
"sample_aspect_ratio": "1:1",
"display_aspect_ratio": "16:9",
"pix_fmt": "yuv420p",
"level": 31,
"chroma_location": "left",
"refs": 1,
"is_avc": "1",
"nal_length_size": "4",
"r_frame_rate": "25/1",
"avg_frame_rate": "25/1",
"time_base": "1/12800",
"start_pts": 0,
"start_time": "0.000000",
"duration_ts": 378368,
"duration": "29.560000",
"bit_rate": "1032960",
"bits_per_raw_sample": "8",
"nb_frames": "739",
"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": "1970-01-01 00:00:00",
"language": "und",
"handler_name": "VideoHandler"
}
},
{
"index": 1,
"codec_name": "aac",
"codec_long_name": "AAC (Advanced Audio Coding)",
"profile": "LC",
"codec_type": "audio",
"codec_time_base": "1/48000",
"codec_tag_string": "mp4a",
"codec_tag": "0x6134706d",
"sample_fmt": "fltp",
"sample_rate": "48000",
"channels": 6,
"channel_layout": "5.1",
"bits_per_sample": 0,
"r_frame_rate": "0/0",
"avg_frame_rate": "0/0",
"time_base": "1/48000",
"start_pts": 0,
"start_time": "0.000000",
"duration_ts": 1419264,
"duration": "29.568000",
"bit_rate": "383960",
"max_bit_rate": "416704",
"nb_frames": "1386",
"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": "1970-01-01 00:00:00",
"language": "und",
"handler_name": "SoundHandler"
}
}
],
"format": {
"filename": "/Users/farsheed/Movies/big_buck_bunny_720p_5mb.mp4",
"nb_streams": 2,
"nb_programs": 0,
"format_name": "mov,mp4,m4a,3gp,3g2,mj2",
"format_long_name": "QuickTime / MOV",
"start_time": "0.000000",
"duration": "29.568000",
"size": "5253880",
"bit_rate": "1421504",
"probe_score": 100,
"tags": {
"major_brand": "isom",
"minor_version": "512",
"compatible_brands": "isomiso2avc1mp41",
"creation_time": "1970-01-01 00:00:00",
"encoder": "Lavf53.24.2"
}
}
}
有关详细信息,请参阅文档
用途ffprobe:
ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=s=x:p=0 input.mp4
示例输出:
1280x720
有关详细信息,请参阅FFprobe文档和FFmpeg Wiki:FFprobe技巧.
运行命令
exiftool VIDEOFILE
你得到的输出类似于:
ExifTool Version Number : 9.76
File Name : gource2.mkv
Directory : .
File Size : 2010 MB
File Modification Date/Time : 2015:01:07 14:16:22-06:00
File Access Date/Time : 2015:01:07 14:16:22-06:00
File Inode Change Date/Time : 2015:01:07 14:16:22-06:00
File Permissions : rw-rw-r--
File Type : MKV
MIME Type : video/x-matroska
EBML Version : 1
EBML Read Version : 1
Doc Type : matroska
Doc Type Version : 4
Doc Type Read Version : 2
Timecode Scale : 1 ms
Muxing App : libebml v1.3.0 + libmatroska v1.4.1
Writing App : mkvmerge v7.4.0 ('Circles') 64bit built on Dec 17 2014 11:31:10
Duration : 2:35:09
Date/Time Original : 2015:01:07 20:14:22Z
Video Codec ID : V_MPEG4/ISO/AVC
Video Frame Rate : 60
Track Language : und
Image Width : 1280
Image Height : 1024
Display Width : 1280
Display Height : 1024
Track Number : 2
Track Type : Audio
Audio Codec ID : A_DTS
Default Duration : 10.666666 ms
Audio Sample Rate : 48000
Audio Channels : 6
Image Size : 1280x1024
使用ffmpeg/ffprobe
运行命令
ffprobe VIDEOFILE
或者:
ffmpeg -i VIDEOFILE
你得到的输出类似于:
ffprobe version 2.1.6 Copyright (c) 2007-2014 the FFmpeg developers
built on Nov 29 2014 12:07:56 with gcc 4.8.3 (GCC) 20140911 (Red Hat 4.8.3-7)
configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-frei0r --enable-gnutls --enable-libass --enable-libcdio --enable-libcelt --enable-libdc1394 --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopencv --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
libavutil 52. 48.101 / 52. 48.101
libavcodec 55. 39.101 / 55. 39.101
libavformat 55. 19.104 / 55. 19.104
libavdevice 55. 5.100 / 55. 5.100
libavfilter 3. 90.100 / 3. 90.100
libavresample 1. 1. 0 / 1. 1. 0
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Input #0, matroska,webm, from 'gource2.mkv':
Metadata:
creation_time : 2015-01-07 20:14:22
Duration: 02:35:09.70, start: 0.000000, bitrate: 1811 kb/s
Stream #0:0: Video: h264 (Constrained Baseline), yuv420p, 1280x1024, SAR 1:1 DAR 5:4, 60 fps, 60 tbr, 1k tbn, 120 tbc (default)
Stream #0:1(eng): Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536 kb/s (default)
使用mplayer
运行命令
mplayer -really-quiet -ao null -vo null -identify -frames 0 VIDEOFILE
你得到的输出类似于:
ID_VIDEO_ID=0 ID_AUDIO_ID=0 ID_AID_0_LANG=eng ID_CLIP_INFO_NAME0=creation_time ID_CLIP_INFO_VALUE0=2015-01-07 20:14:22 ID_CLIP_INFO_N=1 ID_FILENAME=gource2.mkv ID_DEMUXER=lavfpref ID_VIDEO_FORMAT=H264 ID_VIDEO_BITRATE=0 ID_VIDEO_WIDTH=1280 ID_VIDEO_HEIGHT=1024 ID_VIDEO_FPS=60.000 ID_VIDEO_ASPECT=0.0000 ID_AUDIO_FORMAT=8193 ID_AUDIO_BITRATE=1536000 ID_AUDIO_RATE=48000 ID_AUDIO_NCH=6 ID_START_TIME=0.00 ID_LENGTH=9309.70 ID_SEEKABLE=1 ID_CHAPTERS=0 ID_VIDEO_CODEC=ffh264 ID_AUDIO_BITRATE=1536000 ID_AUDIO_RATE=48000 ID_AUDIO_NCH=6 ID_AUDIO_CODEC=ffdca ID_EXIT=EOF使用mediainfo
运行命令
mediainfo VIDEOFILE
你得到的输出类似于:
General
Unique ID : 311795358270161665158539797930749663166 (0xEA919A09196F0CAEF4E1B4FEB72B17BE)
Complete name : gource2.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 1.96 GiB
Duration : 2h 35mn
Overall bit rate : 1 811 Kbps
Encoded date : UTC 2015-01-07 20:14:22
Writing application : mkvmerge v7.4.0 ('Circles') 64bit built on Dec 17 2014 11:31:10
Writing library : libebml v1.3.0 + libmatroska v1.4.1
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L4.2
Format settings, CABAC : No
Format settings, ReFrames : 1 frame
Codec ID : V_MPEG4/ISO/AVC
Bit rate : 266 Kbps
Width : 1 280 pixels
Height : 1 024 pixels
Display aspect ratio : 5:4
Frame rate mode : Variable
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Writing library : x264 core 138 r2363 c628e3b
Encoding settings : cabac=0 / ref=1 / deblock=0:1:1 / analyse=0:0 / me=dia / subme=0 / psy=1 / psy_rd=0.40:0.00 / 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=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=250 / keyint_min=25 / scenecut=0 / intra_refresh=0 / rc=crf / mbtree=0 / crf=22.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=0
Default : Yes
Forced : No
Audio
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Mode : 16
Format settings, Endianness : Big
Codec ID : A_DTS
Duration : 2h 35mn
Bit rate mode : Constant
Bit rate : 1 509 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Compression mode : Lossy
Stream size : 1.64 GiB (83%)
Language : English
Default : Yes
Forced : No
时间总结
exiftool
real 0m0.089s
user 0m0.081s
sys 0m0.008s
mplayer
real 0m0.050s
user 0m0.034s
sys 0m0.017s
ffprobe/ffmpeg
real 0m0.017s
user 0m0.011s
sys 0m0.007s
mediainfo
real 0m0.029s
user 0m0.025s
sys 0m0.004s
YMMV,但ffprobe是最快的媒体信息,然后是mplayer,最后是exiftool
ffprobe < mediainfo < mplayer < exiftool
MediaInfo有一个命令行版本,并提供维度以及大量其他信息.
要仅返回宽度和高度mediainfo是一个很好的工具.
mediainfo --Inform ="Video;%Width%"Videofile && mediainfo --Inform ="Video;%Height%"Videofile将为大量支持的视频文件做到这一点,不多也不少.
Inform=您可以使用该命令获得一长串有用的参数mediainfo --Info-Parameters
如果要使用标准WidthXHeight格式的输出 Video;%Width%" Video.File)&& Video;%Height%" Video.File)&&echo $Width"X"$Height
有一个bash脚本,在这里,你可以很容易地修改,以满足您的需求.
资料来源:
使用具有最小重新编码的FFMPEG添加叠加
http://manpages.ubuntu.com/manpages/xenial/man1/mediainfo.1.html
whiptail:如何将输出重定向到环境变量？
如何在Bash中连接字符串变量
尝试midentify.sh(MPlayer的源代码树中的TOOLS/midentify.sh).
它将以可解析的格式显示信息:
$ ./midentify.sh /data/myvid.flv ID_VIDEO_ID=0 ID_AUDIO_ID=1 ID_FILENAME=/data/myvid.flv ID_DEMUXER=lavfpref ID_VIDEO_FORMAT=VP6F ID_VIDEO_BITRATE=0 ID_VIDEO_WIDTH=640 ID_VIDEO_HEIGHT=480
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