[MEncoder-users] h264 (and help with encoding) or divx

[Alex Samad]

Hi

I am in the process of processing my video camera footage I have taken.

I was hoping to go to h264, but testing the resultant files on my xbox
(xbmc), it is very choppy, it can't seem to keep up (also encoding sound
to aac).  So I am thinking to either go back to encoding with divx or
buy an xbox360 ?

I would like to stay with h264 it saves a lot of space.

My other problem with x264 is I get boxy area's when the back ground is
a wall, with a visible light gradient (you can see it get darker the
further away it is).  This looks okay in the original format, but when
encoded with x264 it goes all blocky and not smooth at all

these are the flags I am using
    H264COMMON=":frameref=4:mixed_refs:bframes=16:b_adapt:b_pyramid:weight_b:bime:direct_pred=auto:me=umh:me_range=24:subq=7:brdo:chroma_me:trellis=1:cabac:deblock:8x8dct:partitions=p8x8,b8x8,i8x8,i4x4:nofast_pskip:nodct_decimate:threads=auto:keyint=250:qp_min=10:qp_max=51:ip_factor=1.4:pb_factor=1.3:qcomp=0.6:qblur=0.5:chroma_qp_offset=0"

    ENC1="x264 -x264encopts pass=1:crf=18:turbo$H264COMMON"
    ENC2="x264 -x264encopts pass=3:bitrate=$BITRATE$H264COMMON"

    AENC="-af volnorm=1"

    FILTER1=""

    FILTER2="-vf spp,hqdn3d=2:1:2"

   AUDIO="-oac faac -faacopts object=1:tns:quality=300:mpeg=4"

    ASPECT="-aspect 16:9"

    ADDOPT=


    echo "Video Pass 1/3"
 	nice mencoder $QUIET \
            $ASPECT \
            -alang en\
            $FILTER1 \
            -ovc $ENC1 \
            -nosound \
            -passlogfile "$PASSLOG" \
            -o /dev/null \
            "$INFILE" $ADDOPT

    echo "Video & Audio Pass 2/3"
    nice mencoder $QUIET \
            $ASPECT \
            -alang en\
            $FILTER2 \
            $AENC \
            -ovc $ENC2 \
            -passlogfile "$PASSLOG" \
            $AUDIO \
            -o "$AVIFILE" \
            "$INFILE" $ADDOPT

    echo "Video & Audio Pass 3/3"
    nice mencoder $QUIET \
            $ASPECT \
            -alang en\
            $FILTER2 \
            $AENC \
            -ovc $ENC2 \
            -passlogfile "$PASSLOG" \
            $AUDIO \
            -o "$AVIFILE" \
            "$INFILE" $ADDOPT


    echo "Extract Video"
    nice MP4Box -aviraw video "$AVIFILE" > "$WRKDIR/aviraw_video.out" &
    WAITPD="$!"

    # Extracts to ${BFILE}_audio.raw
    echo "Extract Audio"
    nice MP4Box -aviraw audio "$AVIFILE" > "$WRKDIR/aviraw_audio.out" &
    WAITPD="$WAITPD $!"

    wait $WAITPD

    mv $SNDFILERAW $SNDFILEAAC

    echo "Make mp4"
    MP4Box -add "$VIDFILERAW" -add "$SNDFILEAAC" -fps 25 -new
"${OUTFILE}" > "$WRKDIR/MP4Box.out"



What can I do to smooth out these ares with out loosing too much
definition in the for ground.

Also how can I use mplayer (or mencoder) to output to a jpg a specific
frame (or time reference) so I can give examples

Thanks


- 
"The march to war affected the people's confidence. It's hard to make investment. See, if you're a small business owner or a large business owner and you're thinking about investing, you've got to be optimistic when you invest. Except when you're marching to war, it's not a very optimistic thought, is it? In other words, it's the opposite of optimistic when you're thinking you're going to war."

	- George W. Bush
02/09/2004
Springfield, MO
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