Video im Web

Video im Web

Format

  • Flash Video
    • Flash Videoplayer Applikation FlowPlayer
    • Adobe Flash Plugin erforderlich

Konvertierung

  • Konvertieren in flv -Video mittels mencoder 

mencoder -of lavf \
         -oac mp3lame -lameopts abr:br=56 \
         -ovc lavc -lavcopts vcodec=flv:vbitrate=500:mbd=2:mv0:trell:v4mv:cbp:last_pred=3 -srate 22050 \
         -vf pp=ac \
         <infile> -o <outfile.flv>

  • oder via ffmpeg
  • ggf. zunächst in "portables" Format für ffmpeg konvertieren
  • Erzeugen der FLV-Metadaten mittels Javaklasse swfx-flv-duration.jar 

# identify media
mplayer -identify -ao null -vo null -frames 0 <infile>  2>/dev/null

# create portable media file with ffv1-format
mencoder -quiet <infile> -ovc lavc -lavcopts vcodec=ffv1 -oac pcm -o <outfile.ffv1>

# convert into flv-format
# bit rate of audio (valid values are 16,32,64)
AUDIO_BITRATE=32
# sampling rate (valid values are 11025, 22050, 44100)
AUDIO_SAMPLINGRATE="22050"
VIDEO_BITRATE="400"
VIDEO_SIZE="384x288"     # Beachte Seitenverhältnis

$ ffmpeg -i <infile.ffv1> -ab $AUDIO_BITRATE -ar $AUDIO_SAMPLINGRATE -b $VIDEO_BITRATE -s "${VIDEO_SIZE}" -y <outfile.tmp.flv>

# add flv metadata
$ CLASSPATH=$CLASSPATH:swfx-flv-duration.jar java org.swfx.flvduration.Main <outfile.tmp.flv> <outfile.flv>

FlowPlayer

  • Wiedergabe von flv -Video

Einbettung in Webseiten 

<object type="application/x-shockwave-flash" data="FlowPlayerClassic.swf"
        width="360" height="308" id="FlowPlayer">
        <param name="allowScriptAccess" value="sameDomain" />
        <param name="movie" value="FlowPlayerClassic.swf" />
        <param name="quality" value="high" />
        <param name="flashvars" value="config={videoFile: 'myvideo.flv', autoPlay: false, loop: false}" />
</object>

Links

TUCaktuell