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=Video=
=Video=
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==Encoding Video==
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I had some video which played way too slow on the N900, so I re-encoded with this pile of cruft:
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More space for talking about [[User:Jebba/Video|video]] at the new page.
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#!/bin/sh
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mencoder $1 -oac mp3lame -ovc lavc \
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        -lavcopts vcodec=mpeg4:mbd=1:vbitrate=300 -vf scale=352:208 \
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        -ffourcc DIVX -o $1-out.avi
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Run thusly:
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burger-encode ralf.mov
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And it will give you "ralf-out.mov.avi"...Uh, I will have the output file get a reasonable name, of course... Works for now. This does ''not'' work on the N900 at the moment because the mencoder in the mplayer package is compiled without mp3lame support. Bah.
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See also (where I got above from): [[Manual_video_encoding]].
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Ok, here's a far better script than the above that I took and slightly modified to work with gpac instead of mp4creator.
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#!/bin/bash
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# n900-encode
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# Encode videos for N900...
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#
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# On Fedora 12 (rpmfusion.org) needs packages:
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# gpac, mplayer, mencoder, x264, faac
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# Run thusly:
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# n900-encode [in video] [out video] [options]
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# Example:
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# n900-encode cabezon.mp4 cabezon.avi
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#
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# Largely taken from:
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# http://www.seiichiro0185.org/doku.php/n800:mp4encoding
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_INFILE="$1"
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_OUTFILE="$2"
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_MPOPTS="$3"
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identifySource()
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{
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  mplayer -identify -ao null -vo null -endpos 2 ${_MPOPTS} "${_INFILE}" | grep ID_ > /tmp/n800-encode.$$.ident
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  FPS=$(cat /tmp/n800-encode.$$.ident | grep ID_VIDEO_FPS | uniq | cut -d '=' -f 2)
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  ASPECT=$(cat /tmp/n800-encode.$$.ident | grep ID_VIDEO_ASPECT | tail -n 1 | cut -d '=' -f 2 | cut -d ' ' -f 2)
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  WS=`expr $ASPECT \> 1.6 \& $ASPECT \< 1.9`
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  if [[ `expr $ASPECT \> 2.0` -eq 1 ]]
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  then
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    WS=2
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  fi
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  case ${WS} in
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    0) SCALE="320:240"
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      echo "encoding for standard"
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      ;;
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    1) SCALE="400:224"
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      echo "encoding for widescreen"
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      ;;
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    2) SCALE="400:192"
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      echo "encoding for extra-widescreen"
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      ;;
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  esac
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}
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encode()
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{
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  x264 -o "$PWD/n800-encode.$$/video.264" "$PWD/n800-encode.$$/video.y4m" --threads 3 --no-cabac --bitrate 250 -A i4x4,p4x4,p8x8,b8x8 --level 1.2 >/dev/null 2>/dev/null &
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  faac -b 96 --mpeg-vers 4 -o "$PWD/n800-encode.$$/audio.aac" "$PWD/n800-encode.$$/audio.wav" 2>/dev/null >/dev/null&
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  sleep 1
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  mplayer -vf scale=${SCALE},unsharp=c4x4:0.3:l5x5:0.5 -ao pcm:file="$PWD/n800-encode.$$/audio.wav" -vo yuv4mpeg:file="$PWD/n800-encode.$$/video.y4m" -ass -embeddedfonts -noframedrop ${_MPOPTS} "${_INFILE}"
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  rm -f "${_OUTFILE}"
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  MP4Box -new -add "$PWD/n800-encode.$$/video.264" -add "$PWD/n800-encode.$$/audio.aac" -fps ${FPS} "${_OUTFILE}"
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}
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prepareTemp()
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{
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  mkdir -p "$PWD/n800-encode.$$"
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  mkfifo "$PWD/n800-encode.$$/video.y4m"
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  mkfifo "$PWD/n800-encode.$$/audio.wav"
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}
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cleanupTemp()
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{
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  rm -Rf "$PWD/n800-encode.$$"
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  rm -f /tmp/n800-encode.$$.ident
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}
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trap cleanupTemp SIGINT SIGTERM
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identifySource
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prepareTemp
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encode
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cleanupTemp
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==mplayer==
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Play video from main "good" back camera:
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mplayer tv:// -tv device=/dev/video0
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Play video from front camera (next to screen):
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mplayer tv:// -tv device=/dev/video1
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Note, the front camera looks absolutely terrible like there is far too much gain or something and has a huge band across the right side. I'm hoping this is just a kernel driver issue and it will contain less suck in the future.
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More extensive scriptlet:
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mplayer \
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        -fs \
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        -v \
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        -nosound \
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        -ao null \
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        -nojoystick \
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        -nolirc \
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        -ontop \
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        -framedrop \
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        -stop-xscreensaver \
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        -nocache \
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        -noslices \
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        -vo xv \
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        -tv device=/dev/video0 \
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        tv://
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The -tv option can take many more options, like:
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-tv brightness=50:contrast=50:hue=0:saturation=-0:gain=0:device=/dev/video0
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If your camera settings get weird (e.g. like everybody looks like a green monster), just quit mplayer, close the camera and re-open it. The default/stock program will reset it.
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===See also===
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[http://talk.maemo.org/showthread.php?t=26288 use cam as desktop webcam with gstreamer]
=Mirrors=
=Mirrors=

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