使用MPlayer获取文件信息

原址：http://blog.csdn.net/songjinshi/article/details/6520696

关键字:mplayerffmpegfaacfaadlamexvidx264

1.使用mplayer分析多媒体文件信息

mplayer-identify-frames5-endpos0-vonullYOU-FILE

MPlayerSVN-r29319-4.3.2(C)2000-2009MPlayerTeam

Playingonepiece.mp4.

libavformatfileformatdetected.

ID_AUDIO_ID=0

[lavf]Audiostreamfound,-aid0

ID_VIDEO_ID=1

[lavf]Videostreamfound,-vid1

VIDEO:[avc1]1280x72024bpp23.976fps0.0kbps(0.0kbyte/s)

ID_FILENAME=onepiece.mp4

ID_DEMUXER=lavfpref

ID_VIDEO_FORMAT=avc1

ID_VIDEO_BITRATE=0

ID_VIDEO_WIDTH=1280

ID_VIDEO_HEIGHT=720

ID_VIDEO_FPS=23.976

ID_VIDEO_ASPECT=0.0000

ID_AUDIO_FORMAT=255

ID_AUDIO_BITRATE=0

ID_AUDIO_RATE=44100

ID_AUDIO_NCH=2

ID_LENGTH=629.98

ID_SEEKABLE=1

ID_CHAPTERS=0

==========================================================================

Openingvideodecoder:[ffmpeg]FFmpeg'slibavcodeccodecfamily

Selectedvideocodec:[ffh264]vfm:ffmpeg(FFmpegH.264)

==========================================================================

ID_VIDEO_CODEC=ffh264

==========================================================================

Openingaudiodecoder:[faad]AAC(MPEG2/4AdvancedAudioCoding)

FAAD:compressedinputbitratemissing,assuming128kbit/s!

AUDIO:44100Hz,2ch,s16le,128.0kbit/9.07%(ratio:16000->176400)

ID_AUDIO_BITRATE=128000

ID_AUDIO_RATE=44100

ID_AUDIO_NCH=2

Selectedaudiocodec:[faad]afm:faad(FAADAAC(MPEG-2/MPEG-4Audio))

以上红色部分就是我们需要的常规视频信息

2.使用ffmpeg获得多媒体视频文件信息

Seemsstream1codecframeratediffersfromcontainerframerate:1000.00(1000/1)->24.00(24/1)

Input#0,asf,from'Ter2_720.wmv':

Duration:00:02:02.94,start:5.000000,bitrate:7590kb/s

Stream#0.0:Audio:wmav2,44100Hz,stereo,s16,192kb/s

Stream#0.1:Video:vc1,yuv420p,1280x544,7078kb/s,24tbr,1ktbn,1ktbc

根据mplayer&ffmpeg的输出，用脚本（python）对输出做分析，既可以获得

多媒体视频文件的常规信息

比如

分辨率，码流，视频格式，音频格式，音频采样率，音频声道，fps，等等