Enable screenshot filter

When we want to take screenshots when playing video, first we need to set the “-vf screenshot” option:

$ mplayer -vf screenshot video.file

If we want to enable the screenshot filter by default, we may put the option by adding one line into ~/.mplayer/config :

vf=screenshot

To take a single screenshot

Just press ‘s‘.

To take continuous screenshots

To start taking continuous screenshots, press ‘S‘; press ‘S‘ again to stop.

Remember to stop it, otherwise mplayer will keep taking screenshots.

Screenshots will be stored under the current directory with name “shot00001.png”, “shot00002.png”, and so on.

That’s quite easy, right? Then enjoy it~

Extract the audio, convert it to PCM and write the resulting wave file to audio.wav:

mplayer -vo null -hardframedrop -ao pcm:file=audio.wav video.avi

Convert .wav file to .mp3 file:

lame -h out.wav out.mp3

Preview a video composed of all jpeg files from the current folder at 15fps:

mplayer "mf://*.jpg" -mf fps=15

Create a 15fps video from all jpeg files of the current folder:

mencoder "mf://*.jpg" -mf fps=15 -ovc lavc -o ./output.avi

Cut a video from second 6 to second 206 (which is 200+6, the output.avi is 200 seconds long):

mencoder big-file.avi -ss 6 -endpos 200 -ovc copy -oac copy -o output.avi

Convert raw videos into ISO standard MPEG-4 (DivX 5, XVID compatible) videos:

mencoder source.avi -ovc lavc -oac lavc -ffourcc DX50 -lavcopts
 vcodec=mpeg4:vbitrate=400:v4mv:mbd=2:trell:autoaspect:dia=2:acodec=mp3:abitrate=32:vpass=1
 -vf hqdn3d -o output.avi

Get informations about a video:

mplayer -frames 0 -identify ./video.avi

Show all mplayer filter list:

mplayer -vf help

Play audio files over ssh connection

ssh user@example.com "cat audio.mp3" | mplayer -cache 8192 -

Play files from FTP:

wget ftp://example.com/file.avi -O - | mplayer -cache 8192 -

Repeat a file multiple times:

mplayer file1 -loop 2 file2 -loop 1 file3 -loop 4

Record stream:

mplayer -dumpstream -dumpfile output.rm -cache 4096 rtsp://example.com/file.rm

Update history:
Jun 23, 2010. Correct the errors about vcodec and endpos options.

1. Add rpmfusion repository:

Enable RPM Fusion repositories

2. Install MPlayer

# yum install mplayer

3. Get codecs

Dowload all-yyyymmdd.tar.bz2 from http://www1.mplayerhq.hu/MPlayer/releases/codecs

Let’s use all-20100303.tar.bz2 now.

# tar xf all-20100303.tar.bz2
# mkdir -p /usr/local/lib/codecs/
# mv all-20100303/* /usr/local/lib/codecs/

4. Enjoy it!

5. Play rmvb files

If there is no video or mplayer crashes when playing .rmvb files, you need to install libstdc++ libraries:

# yum install libstdc++ compat-libstdc++-33 compat-libstdc++-296

Then try using mplay to play rmvb files again. It should work now.

Update history
Dec. 21, 2010. Change codecs

Mplayer keyboard control:

      Seek backward/forward 10 seconds.
    up and down
      Seek forward/backward 1 minute.
    pgup and pgdown
      Seek forward/backward 10 minutes.
    [ and ]
      Decrease/increase current playback speed by 10%.
    { and }
      Halve/double current playback speed.
    backspace
      Reset playback speed to normal.

      Go backward/forward in the playlist.
    enter
      go forward in the playlist, even over the end.
    home and end
      next/previous playtree entry in the parent list
    ins and del (asx playlist only)
      next/previous alternative source.
    p / space
      pause (pressing again unpauses).
    .
      step forward. pressing once will pause movie, every con-
      secutive press will play one frame and then go into pause
      mode again (any other key unpauses).
    q / esc
      stop playing and quit.
    u
      stop playing (and quit if -idle is not used).
    + and -
      adjust audio delay by +/- 0.1 seconds.
    / and *
      decrease/increase volume.
    9 and 0
      decrease/increase volume.
    ( and )
      adjust audio balance in favor of left/right channel.
    m
      mute sound.
    _ (mpeg-ts, avi and libavformat only)
      cycle through the available video tracks.
    # (dvd, mpeg, matroska, avi and libavformat only)
      cycle through the available audio tracks.
    tab (mpeg-ts and libavformat only)
      cycle through the available programs.
    f
      toggle fullscreen (also see -fs).
    t
      toggle stay-on-top (also see -ontop).
    w and e
      decrease/increase pan-and-scan range.
    o
      toggle osd states: none / seek / seek + timer / seek +
      timer + total time.
    d
      toggle frame dropping states: none / skip display / skip
      decoding (see -framedrop and -hardframedrop).
    v
      toggle subtitle visibility.
    j
      cycle through the available subtitles.
    y and g
      step forward/backward in the subtitle list.
    f
      toggle displaying "forced subtitles".
    a
      toggle subtitle alignment: top / middle / bottom.
    x and z
      adjust subtitle delay by +/- 0.1 seconds.
    r and t
      move subtitles up/down.
    i (-edlout mode only)
      set start or end of an edl skip and write it out to the
      given file.
    s (-vf screenshot only)
      take a screenshot.
    s (-vf screenshot only)
      start/stop taking screenshots.
    i
      show filename on the osd.
    ! and @
      seek to the beginning of the previous/next chapter.
    d (-vo xvmc, -vo vdpau, -vf yadif, -vf kerndeint only)
      activate/deactivate deinterlacer.
    a  cycle through the available dvd angles.

    (the following keys are valid only when using a hardware accel-
    erated video output (xv, (x)vidix, (x)mga, etc), the software
    equalizer (-vf eq or -vf eq2) or hue filter (-vf hue).)

    1 and 2
      adjust contrast.
    3 and 4
      adjust brightness.
    5 and 6
      adjust hue.
    7 and 8
      adjust saturation.

    (the following keys are only valid if gui support is compiled in
    and will take precedence over the keys defined above.)

    enter
      start playing.
    esc
      stop playing.
    l
      load file.
    t
      load subtitle.
    c
      open skin browser.
    p
      open playlist.
    r
      open preferences.

1. 外挂字体方法

比如当前目录下有文件为Gone with the Wind.avi, 字幕文件为: Gone.With.the.Wind.1939.Bluray.720p.DTS.2Audio.x264-CHD.chs.srt

可以使用如下命令来播放, 将不会出现中文字幕乱码的问题了:

mplayer -ass -subcp cp936  Gone with the Wind.avi -sub Gone.With.the.Wind.1939.Bluray.720p.DTS.2Audio.x264-CHD.chs.srt

对于以上参数的解释:
-ass: Turn on SSA/ASS subtitle rendering. With this option, libass will be used for SSA/ASS external subtitles and Matroska tracks. You may also want to use -embeddedfonts. NOTE: Unlike normal OSD, libass uses fontconfig by default. To disable it, use -nofontconfig.

-subcp codepage: Specify the subtitle codepage.
The Chinese character codepages:
936 — GBK Supports Simplified Chinese 简体中文
950 — Supports Traditional Chinese 繁体中文

-sub: Use these subtitle files.

另外可以使用sub-fuzziness参数来自动加载字幕文件:
-sub-fuzziness mode: Adjust matching fuzziness when searching for subtitles:
0 exact match
1 Load all subs containing movie name.
2 Load all subs in the current directory.

2. 内嵌字体方法

对于mkv, ogm等内嵌字体文件格式, 可以使用 sid 选项选择内嵌字体:
-sid ID: Display the subtitle stream specified by ID (0-31). MPlayer prints the available subtitle IDs when run in verbose (-v) mode. If you cannot select one of the subtitles on a DVD, also try -vobsubid.

如ID为1的字幕为简体中文:

mplayer *.mkv -sid 1 -subcp cp936

硬盘上的DVD内容:

mplayer dvd://1 -dvd-device /xxx/dvd -sid 0 -subcp cp936

mplayer -ao pcm:file=%7%out.wav MOVIE_FILES

(2) then it is easy to convert .wav file to .mp3 file:

lame -h out.wav out.mp3