encode2mpeglight

来自「君正早期ucos系统(只有早期的才不没有打包成库),MPLAYER,文件系统,图」· 代码 · 共 1,545 行 · 第 1/5 页

        esac
        ;;
    mp3)
        case ${mpegchannels:-2} in
            1) : ${abr:=64} ;;
            2) : ${abr:=128} ;;
        esac
        ;;
    ac3)
        case ${mpegchannels:-2} in
            1) : ${abr:=96} ;;
            2) : ${abr:=192} ;;
            3) : ${abr:=320} ;; # to verify
            4) : ${abr:=384} ;; # to verify
            5) : ${abr:=448} ;; # to verify
            6) : ${abr:=448} ;;
        esac
        ;;
    aac) : ${abr:=$((${mpegchannels:-2}*48))} ;;
    #### mplex fails with asr != 48000 for lpcm
    lpcm) : ${asr:=48000} ${abr:=$((asr*16*${mpegchannels:-2}/1024))} ;;
esac
if [[ ${encode%,*} == 0:?:? && ${!audioformat} = copy ]]; then
    abr=0
    if [[ ! $multiaudio ]]; then
        get_abr
    fi
fi
[[ $mpeg && ${encode%,*} == ?:0:? ]] && \
  vbr=$(($(id_find ID_VIDEO_BITRATE "${MPLAYEROPT[@]}" ${dvddev:+-dvd-device "$dvddev"} "$@")/1000))
case $frameformat in
    DVD) : ${asr:=48000} ;;
    *)   : ${asr:=44100} ;;
esac
case $videonorm in
    p|s)
        : ${vfr:=3}
        ;;
    n)
        [[ $frameformat != VCD && ! $vfr && $hispeed -eq 0 && ! $testmca ]] && vfr=1 && telecine=1
        : ${vfr:=4}
        ;;
esac
[[ $encode && ${encode%,*} != ?:0:? ]] && : ${vfr:=2}
if [[ ! $ofps ]]; then
    case $vfr in
        1) ofps=24000/1001 ;;
        2) ofps=24 ;;
        3) ofps=25 ;;
        4) ofps=30000/1001 ;;
        5) ofps=30 ;;
        6) ofps=50 ;;
        7) ofps=60000/1001 ;;
        8) ofps=60 ;;
    esac
fi
if [[ $split && $split -eq 0 ]]; then
    [[ $mpeg ]] && split= || split=800
fi

###############################################################################
#### get MPlayer version
###############################################################################
mver=$(mencoder 2>/dev/null | awk '$1=="MEncoder"{print $2;exit}')

###############################################################################
#### threads check
###############################################################################
if [[ ! $cpu && -f /proc/cpuinfo ]]; then
    cpu=$(grep -c ^processor /proc/cpuinfo)
    #### if there are 2 logical cpu but 1 physical (hyperthreading)
    #### use only one thread. With kernel 2.4.x it is more efficent.
    ((cpu==2)) && [[ $(uname -r | cut -f 1-2 -d .) = 2.4 ]] && \
      [[ $(grep ^siblings /proc/cpuinfo | uniq | wc -l) -eq 1 ]] && \
      cpu=$((cpu/$(grep ^siblings /proc/cpuinfo | uniq | awk 'END{print $NF}')))
fi
((cpu<2)) && cpu=

###############################################################################
#### -ao pcm arguments
###############################################################################
PCMWAV=(pcm:waveheader:fast:file=%$((${#output}+4))%"$output".wav)
PCMTMP=(pcm:waveheader:fast:file=%$((${#output}+4))%"$output".tmp)
PCMNOWYUV=(pcm:nowaveheader:fast:file=/dev/fd/4)

[[ $dvddev ]] && MPLAYEROPT=( "${MPLAYEROPT[@]}" -dvd-device "$dvddev" )

###############################################################################
#### mplayer/mencoder/mjpegtools options
###############################################################################

#### mencoder output suffix
if [[ $encode ]]; then
    [[ $mpeg ]] && SUF=mpeg || SUF=avi
fi

#### MPLAYERINFO is used for [info]
MPLAYERINFO=( "${MPLAYEROPT[@]}" )

#### mf:// case
if [[ $pictsrc ]]; then
    if [[ $slideaudio && $slideaudio != /dev/null ]]; then
        [[ $(id_find ID_AUDIO_RATE "$slideaudio") != $asr ]] && SRATE="-srate $asr -af-adv force=1" || SRATE=
        CLEAN[${#CLEAN[*]}]="$output".wav
        mplayer "$slideaudio" $SRATE -vo null -vc dummy -ao "${PCMWAV[@]}" $afm ${mpegchannels:+-channels $mpegchannels -af channels=$mpegchannels}
        MPLAYEROPT=( "${MPLAYEROPT[@]}" -fps 1/$(id_find ID_LENGTH "$output".wav) -audiofile "$output".wav )
    else
        if [[ $slideaudio == /dev/null ]]; then
            MPLAYEROPT=( "${MPLAYEROPT[@]}" -fps $slidefps )
            encode=0:${encode#?:}
        else
            MPLAYEROPT=( "${MPLAYEROPT[@]}" -fps $slidefps -audiofile /dev/zero -audio-demuxer 20 -rawaudio format=0x1:rate=48000 )
        fi
    fi
fi

#### MENCODERARG is used for mencoding, vobsub dumping
MENCODERARG=( "${MPLAYEROPT[@]}" ${frames:+-frames $frames} )

MENCODERARG=( "${MENCODERARG[@]}" "${MENCODEROPT[@]}" ${endpos:+-endpos $endpos} ${ofps:+-ofps $ofps} )
if [[ $mpeg && $mpegchannels ]]; then
    MENCODERARG=( "${MENCODERARG[@]}" -channels $mpegchannels )
    af=$(echo "${af:--af }${af:+,}" | sed 's/channels=[^,]*,//')channels=$mpegchannels
elif [[ $channels ]]; then
    MENCODERARG=( "${MENCODERARG[@]}" -channels $channels )
    af=$(echo "${af:--af }${af:+,}" | sed 's/channels=[^,]*,//')channels=$channels
fi

YUVSCALEROPT="-v 1 -n $videonorm ${scale:+-O $frameformat} $YUVSCALEROPT"

MPEG2ENCOPT="${cpu:+-M $cpu }-v 1 -S ${split:-50000} -n $videonorm -F $vfr -s -r 16 ${telecine:+-p} $MPEG2ENCOPT"
case $vfr in
    1|2) MPEG2ENCOPT="-g 6 -G ${GOP:-12} $MPEG2ENCOPT" ;;
    3|6) MPEG2ENCOPT="-g 6 -G ${GOP:-15} $MPEG2ENCOPT" ;;
    4|5|7|8) MPEG2ENCOPT="-g 9 -G ${GOP:-18} $MPEG2ENCOPT" ;;
esac
[[ $frameformat = VCD ]] && MPEG2ENCOPT="-R 2 $MPEG2ENCOPT"
echo "$MPEG2ENCOPT" | grep -q -e '-K hi-res' && YUVSCALEROPT="-M BICUBIC $YUVSCALEROPT" && \
  MPEG2ENCOPT="-4 1 -2 1 $MPEG2ENCOPT" || MPEG2ENCOPT="-4 2 -2 1 $MPEG2ENCOPT"

case $frameformat in
    VCD) MPGRES=${MPGRES:-1} ;;
    SVCD)
        case $frameres in
            1) MPGRES=${MPGRES:-3} ;;
            2) MPGRES=${MPGRES:-1} ;;
        esac
        ;;
    DVD)
        case $frameres in
            1) MPGRES=${MPGRES:-7} ;;
            2) MPGRES=${MPGRES:-6} ;;
            3) MPGRES=${MPGRES:-3} ;;
            4) MPGRES=${MPGRES:-2} ;;
            5) MPGRES=${MPGRES:-1} ;;
        esac
        ;;
esac
case $MPGRES in
    1) H_RES=352 ; [[ $videonorm = n ]] && V_RES=240 || V_RES=288 ;;
    2) H_RES=352 ; [[ $videonorm = n ]] && V_RES=480 || V_RES=576 ;;
    3) H_RES=480 ; [[ $videonorm = n ]] && V_RES=480 || V_RES=576 ;;
    4) H_RES=528 ; [[ $videonorm = n ]] && V_RES=480 || V_RES=576 ;;
    5) H_RES=544 ; [[ $videonorm = n ]] && V_RES=480 || V_RES=576 ;;
    6) H_RES=704 ; [[ $videonorm = n ]] && V_RES=480 || V_RES=576 ;;
    7) H_RES=720 ; [[ $videonorm = n ]] && V_RES=480 || V_RES=576 ;;
esac
case $frameformat in
    VCD)
        : ${vbr:=1152}
        MPEG2ENCOPT="-f 2 -b $vbr -V 46 -B $(((abr*audiostream*101875-vbr*2819+3980000)/100000)) $MPEG2ENCOPT"
        MPLEXOPT="-f 2 -V -b 46 -r $(((abr*audiostream+vbr)*4)) $MPLEXOPT"
        VCDIMAGEROPT="-t vcd2 $VCDIMAGEROPT"
        H_STILL=704
        [[ $videonorm = n ]] && V_STILL=480 || V_STILL=576
        ((MPGRES!=1)) && YUVSCALEROPT="-O SIZE_${H_RES}x${V_RES} ${YUVSCALEROPT/ -O $frameformat}"
        MAXBR=1394
        ;;
    SVCD)
        : ${vbr:=2500}
        MPEG2ENCOPT="-f 5 -b $vbr -V 113 -B $(((abr*audiostream*101250+vbr*742+1665400)/100000)) $MPEG2ENCOPT"
        MPLEXOPT="-V -b 113 -r $(((abr*audiostream+vbr)*4)) $MPLEXOPT"
        if [[ $trick ]]; then
            MPLEXOPT="-f 2 $MPLEXOPT"
            VCDIMAGEROPT="-t vcd2 $VCDIMAGEROPT"
        else
            MPLEXOPT="-f 5 $MPLEXOPT"
            VCDIMAGEROPT="-t svcd $VCDIMAGEROPT"
        fi
        H_STILL=704
        [[ $videonorm = n ]] && V_STILL=480 || V_STILL=576
        ((frameres>1||MPGRES!=3)) && YUVSCALEROPT="-O SIZE_${H_RES}x${V_RES} ${YUVSCALEROPT/ -O $frameformat}"
        MAXBR=2778
        ;;
    DVD)
        : ${vbr:=7500}
        MPEG2ENCOPT="-f 8 -b $vbr -V 230 -B $(((abr*audiostream*101250+vbr*742+1665400)/100000)) $MPEG2ENCOPT"
        MPLEXOPT="-f 8 -V -b 230 -r $(((abr*audiostream+vbr)*4)) $MPLEXOPT"
        H_STILL=720
        [[ $videonorm = n ]] && V_STILL=480 || V_STILL=576
        ((frameres>1||MPGRES!=7)) && YUVSCALEROPT="-O SIZE_${H_RES}x${V_RES} ${YUVSCALEROPT/ -O $frameformat}"
        MAXBR=10080
        ;;
esac

###############################################################################
#### mencoder audio/video/pass options
###############################################################################
if [[ $encode ]]; then
    OPTIONS="-noskiplimit -sws $((hispeed?1:7))"
    if [[ $mpeg ]]; then
        # mencoder can put in the MPEG container:
        # video: mpeg1, mpeg2, mpeg4
        # audio: mp1, mp2, mp3, ac3, aac (not yet: lpcm, dts)
        [[ ${encode%,*} != ?:0:? ]] && : ${mpegaspect:=2}
        #MUX="-mpegopts ${mpegaspect:+vaspect=${ASPECT[mpegaspect]}:}:vbitrate=${vbr}"
        MUX="-mpegopts "
        if [[ $telecine ]]; then
            if [[ $vcodec = mpeg2video || ! $vcodec && $frameformat != VCD ]]; then
                if [[ $vfr == [12] ]]; then
                    [[ $videonorm = n ]] && MUX2=":telecine" || MUX2=":film2pal"
                else
                    do_log "++ WARN: [$PROGNAME] telecine only works with 24000/1001 or 24 fps, disabling it"
                fi
            else
                do_log "++ WARN: [$PROGNAME] telecine only works for MPEG-2, disabling it"
            fi
        fi
        case $frameformat in
            VCD)  MUX="${MUX}format=xvcd"  LAVC="vcodec=${vcodec:-mpeg1video}${LAVC:-:vrc_buf_size=327:vrc_minrate=${vbr}:vrc_maxrate=${vbr}}" ;;
            SVCD) if [[ $trick ]]; then MUX="${MUX}format=xvcd" ; else 
                  MUX="${MUX}format=xsvcd" ; fi ; LAVC="vcodec=${vcodec:-mpeg2video}:vrc_buf_size=917" ;;
            DVD)  MUX="${MUX}format=dvd"   LAVC="vcodec=${vcodec:-mpeg2video}:vrc_buf_size=1835" ;;
        esac
        case $vfr in
            1|2) LAVC="$LAVC:keyint=$((hispeed?1:${GOP:-12}))" ;;
            3|6) LAVC="$LAVC:keyint=$((hispeed?1:${GOP:-15}))" ;;
            4|5|7|8) LAVC="$LAVC:keyint=$((hispeed?1:${GOP:-18}))" ;;
        esac
        [[ $frameformat = VCD && ! $bframes ]] && LAVC="$LAVC:vmax_b_frames=2"
        [[ $mpegmbr ]] && [[ $mpegmbr -lt $vbr ]] && mpegmbr=$vbr
        #### -a 1 is SAR=1 (do not scale), not DAR=1
        [[ $mpegaspect != 1 ]] && LAVC="${LAVC}:aspect=${ASPECT[mpegaspect]}"
        LAVC="${LAVC}${mpegmbr:+:vrc_maxrate=$mpegmbr}${inter_matrix:+:inter_matrix=${inter_matrix}}${intra_matrix:+:intra_matrix=${intra_matrix}}"
        OF="-of mpeg"
        NOSKIP=-noskip
        vbitrate=$vbr
        if [[ ${encode%,*} != ?:0:? ]]; then
            for ((a=0;a<${#MENCODERARG[*]};a++)); do
                while [[ ${MENCODERARG[a]} = -vf ]]; do
                    unset MENCODERARG[a] MENCODERARG[a+1]
                    MENCODERARG=( "${MENCODERARG[@]}" )
                done
            done
            MENCODERARG=( "${MENCODERARG[@]}" ${vf:--vf }${vf:+,}${scale:+scale=${H_RES}:${V_RES}${interlaced:+:1},}harddup )
        fi
    fi

    BASIC="$LAVC:vbitrate=${vbitrate}${cpu:+:threads=$cpu}${bframes:+:vmax_b_frames=$bframes}"
    ((hispeed)) && BASIC="$BASIC:vme=0" || BASIC="$BASIC:psnr"
    [[ $mpeg && $frameformat = VCD ]] || BASIC="$BASIC${interlaced:+:ildct:ilme}"
    echo "$YUVSCALEROPT" | grep -q -e '-O MONOCHROME' && BASIC="$BASIC:gray"
    
    HQ="${BASIC}:mbd=2"

    if [[ $mpeg ]]; then
        #### dia=6 could be added
        BESTSIZE="${BASIC}:mbd=1:loop:mv0:vlelim=-4:vcelim=7:trell:precmp=1:cmp=1:subcmp=1"
        [[ ! $bframes ]] && BESTSIZE="$BESTSIZE:vmax_b_frames=2"

        #### last_pred=1-2 could be added
        BESTQUALITY="${BASIC}:mbd=2:mv0:precmp=6:cmp=6:subcmp=6"
        [[ $vbitrate -ge 3500 && $frameformat != VCD && $vcodec != mpeg1video ]] && BESTQUALITY="$BESTQUALITY:dc=9"
    fi

    case $encode in
        0:?:?|0:?:?,*) AUDIOPASS="-oac copy" ;;
        1:?:?|1:?:?,*) AUDIOPASS="-oac pcm" ;;
        2:?:?|2:?:?,*) AUDIOPASS="-oac mp3lame -lameopts ${acustom:-fast}" ;;
        3:?:?) AUDIOPASS="-oac mp3lame -lameopts preset=standard" ;;
        4:?:?) AUDIOPASS="-oac lavc -lavcopts acodec=mp2:abitrate=$abr" ;;
        5:?:?) AUDIOPASS="-oac lavc -lavcopts acodec=mp3:abitrate=$abr" ;;
        6:?:?) AUDIOPASS="-oac lavc -lavcopts acodec=ac3:abitrate=$abr" ;;
        7:?:?) AUDIOPASS="-oac $TOOLAME -${TOOLAME}opts br=$abr" ;;
        8:?:?) AUDIOPASS="-oac faac -faacopts ${acustom:-br=$abr}" ;;
        3:?:?,*) AUDIOPASS="-oac mp3lame -lameopts preset=${encode#*,}" ;;
        4:?:?,*) AUDIOPASS="-oac lavc -lavcopts acodec=mp2:abitrate=${encode#*,}" ;;
        5:?:?,*) AUDIOPASS="-oac lavc -lavcopts acodec=mp3:abitrate=${encode#*,}" ;;
        6:?:?,*) AUDIOPASS="-oac lavc -lavcopts acodec=ac3:abitrate=${encode#*,}" ;;
        7:?:?,*) AUDIOPASS="-oac $TOOLAME -${TOOLAME}opts br=${encode#*,}" ;;
        8:?:?,*) AUDIOPASS="-oac faac -faacopts ${acustom:-br=${encode#*,}}" ;;
    esac
    encode=${encode%,*}
    case $encode in
        ?:0:?) VIDEOPASS="$OF $MUX -ovc copy $NOSKIP" ; encode=${encode%%:*}:0:1 ; turbo=0 ;; # copy uses only one pass
        ?:1:?) VIDEOPASS="$OF $MUX$MUX2 -ovc lavc -lavcopts ${BASIC}${vcustom:+:$vcustom}" ; : ${turbo:=0} ;;
        ?:2:?) VIDEOPASS="$OF $MUX$MUX2 -ovc lavc -lavcopts ${HQ}"                         ; : ${turbo:=1} ;;
        ?:3:?) VIDEOPASS="$OF $MUX$MUX2 -ovc lavc -lavcopts ${BESTSIZE}"                   ; : ${turbo:=1} ;;
        ?:4:?) VIDEOPASS="$OF $MUX$MUX2 -ovc lavc -lavcopts ${BESTQUALITY}"                ; : ${turbo:=1} ;;
    esac
    ((turbo)) && turbo=:turbo || turbo=
    PASS=${encode##*:}
    [[ $normalize && $encode != 0:?:? ]] && af=${af:--af }${af:+,}volnorm
fi


###############################################################################
#### more functions
###############################################################################