[BETA][BASH] Convertitore video per device Android!

[elegos]

Ciao ragazzi!

Ho creato questo (secondo, più avanzato) script per la conversione dei video (qualsiasi formato) in video compatibili con Android (H.264/AAC). Supporta varie risoluzioni. Attualmente (per un bug di FFmpeg) l'audio in DTS è sballato (diciamo pure girato di 90° a sinistra). Se il contenitore è matroska (.mkv) cercherà prima una traccia AC3 e solo se non la trova prenderà la prima traccia audio che trova (di solito, appunto, DTS). L'aspect ratio viene cercato in modo automatico, se non lo trova lo richiede (facendovi vedere la risoluzione del filmato originale).

Eseguibili richiesti: ffmpeg, mkvtoolnix (comprendente gli strumenti per il formato matroska come mkvmerge, mkvextract etc)

FFmpeg 0.5.1 per Ubuntu con librerie closed (necessario per encoding in AAC)

avc (chmod +x avc)

#!/bin/bash

echo -e "EleGoS' Advanced Video Converter for Android Devices v.1.8.3\n"

function echoHelp() {
	echo "Options (required):"
	echo -e "\ti: the video to convert"
	echo "Usage:"
	echo -e "\t$0 -i MyMovie.ext"
}

if [ $# -eq 0 ]; then
	echoHelp
	exit 0
fi

while getopts "i:o:h" Option
do
	case $Option in
		i	) input=${OPTARG};;
		*	)
			echoHelp
			exit 0
		;;
	esac
done

ffmpeg_check=$(which ffmpeg)
matroska_check=$(which mkvmerge)

if [[ -z $ffmpeg_check ]] || [[ -z $matroska_check ]]; then
	echo -e "\nffmpeg or mkvtoolnix not installed! Please install them."
	exit 0
fi

if [ ! -f $input ]; then
	echo -e "\n $input not found."
	exit 0
fi

output=$(basename $input)
output=${output%.*}
output=$output-android.mp4

# get some info from the original video
ffmpeg -i $input 2>ffmpeg.tmp

# presets and preferences
source preferences.avc
source functions


if [ -z $device_height ] || [ -z $device_width ]; then
	echo -e "\nIt was impossible to find your device, please check the resolutions.preset file. Please insert your device screen resolution (in landscape):"
	read -p "Height: " device_height
	read -p "Width: " device_width
fi

# check if it's in a Matrioska format (audio extraction)
matroska=0
check=$(isMatroska $input)
if [ $check -eq 1 ]; then
	matroska=1
fi

# get the aspect ratio
aspect_ratio=$(getAspectRatio ffmpeg.tmp)
if [[ $aspect_ratio = "" ]]; then
		echo "The script was not able to detect the aspect ratio."
		echo "Please input the right AR (see the next line to guess it)."
		cat ffmpeg.tmp | grep "Video"
		read aspect_ratio
fi

# get the original video size
video_original_size=$(cat ffmpeg.tmp | grep Video | awk 'BEGIN{RS=","}/x/{print $1}')
stream=$(echo $video_original_size | grep Stream)

if [[ ! -z $stream ]]; then
	for word in $video_original_size
	do
		check=$(echo $word | grep x)
		if [[ ! -z $check ]]; then
			video_original_size=$word
			break
		fi
	done
fi

IFS='x' read video_original_width video_original_height <<< "$video_original_size"

if [[ -z $video_original_height ]] || [[ -z $video_original_width ]]; then
	echo "The script was not able to detect the video resolution."
	echo "Please input the right values (see the next line to get them)."
	cat ffmpeg.tmp | grep "Video"
	read -p "Height: " video_original_height
	read -p "Width: " video_original_width
fi

new_video_size=($(resizeVideo $video_original_height $video_original_width $device_height $device_width))

inner_height=${new_video_size[0]}
inner_width=${new_video_size[1]}

let height_dif=($device_height-$inner_height)
let width_dif=($device_width-$inner_width)
let pad_height=($height_dif/2)
let pad_width=($width_dif/2)

if [[ $height_dif -lt 0 ]]; then
	let height_dif="($height_dif*(-1))"
fi

if [[ $width_dif -lt 0 ]]; then
	let width_dif="($width_dif*(-1))"
fi

pad_height_rest=`expr $pad_height % 2`
pad_width_rest=`expr $pad_width % 2`

if [ $pad_height_rest -eq 0 ] || [ $pad_height -eq 0 ]; then
		pad_top_bottom="-padtop $pad_height -padbottom $pad_height"
		pad_top=$pad_height
	else
		let pad_top=($pad_height-1)
		let pad_bottom=($pad_height+1)
		pad_top_bottom="-padtop $pad_top -padbottom $pad_bottom"
fi

if [ $pad_width_rest -eq 0 ] || [ $pad_width -eq 0 ]; then
		pad_left_right="-padleft $pad_width -padright $pad_width"
		pad_left=$pad_width
	else
		let pad_left=($pad_width-1)
		let pad_right=($pad_width+1)
		pad_left_right="-padleft $pad_left -padright $pad_right"
fi

if [ "$vf_pad" -gt "0" ]; then
	pad_left_right=""
	pad_top_bottom="-vf pad=$device_width:$device_height:$pad_left:$pad_top"
fi

x="x"
device="$inner_width$x$inner_height"

#extract the audio track
if [ $matroska -eq 1 ]; then
		track=$(mkvmerge -i $input | grep "AC3" | awk '/audio/ { sub(/:$/, "", $3); print $3; exit }')
		if [ -z $track ]; then
			track=$(mkvmerge -i $input | awk '/audio/ { sub(/:$/, "", $3); print $3; exit }')
		fi
		mkvextract tracks $input $track:audio.raw.tmp
		ffmpeg -i audio.raw.tmp -vn -acodec libfaac -ab $audio_bitrate -ac 2 audio.aac
	else
		ffmpeg -i $input -vn -acodec libfaac -ab $audio_bitrate -ac 2 audio.aac
fi

ffmpeg -i $input -threads 0 -an -pass 1 -s $device $pad_top_bottom $pad_left_right -aspect $aspect_ratio -vcodec libx264 -b $video_bitrate -flags +loop -cmp +chroma -partitions 0 -me_method epzs -subq 1 -trellis 0 -refs 1 -coder 0 -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bt $video_bitrate -maxrate 768k -bufsize 2M -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 13 -f rawvideo -y /dev/null
ffmpeg -i $input -threads 0 -an -pass 2 -s $device $pad_top_bottom $pad_left_right -aspect $aspect_ratio -vcodec libx264 -b $video_bitrate -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -flags2 +mixed_refs -me_method umh -subq 5 -trellis 1 -refs 5 -coder 0 -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bt $video_bitrate -maxrate 768k -bufsize 2M -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 13 tmp-video.mp4

ffmpeg -i tmp-video.mp4 -i audio.aac -threads 0 -acodec libfaac -ab $audio_bitrate -ac 2 -vcodec copy $output

rm *.tmp *.aac tmp-video.mp4 *.log*
exit 0

functions

# returns 1 if it's in the Matroska format
function isMatroska() {
	file=$1

	#extension check
	ext=${file/*./}
	if [[ $ext = "mkv" ]]; then
		echo 1
		exit 0
	fi

	#ffmpeg check
	if [ -f "ffmpeg.tmp" ]; then
		ffmpeg -i $file 2>ffmpeg.tmp
	fi
	log=$(cat ffmpeg.tmp | grep "matroska")
	
	if [[ -n $log ]]; then
		echo 1
		exit 0
	fi
	
	echo 0
	exit 0
}

# number1 number2
function max2() {
	if [[ "$1" -gt "$2" ]]; then
			echo $1
		else
			echo $2
	fi
}

# original height, width, device height, width
function resizeVideo() {
	echo "D/resizeVideo: init" >&2
	h1=$1
	w1=$2
	
	h1orig=$1
	w1orig=$2
	
	h2=$3
	w2=$4
	
	max=$(max2 $h1 $w1)
	if [ $max = "$h1" ]; then
			h1=$h2
			let w1="(($w1orig*$h1)/$h1orig)"
			
			if [ $w2 -lt $w1 ]; then
				h1orig=$h1
				w1orig=$w1
				w1=$w2
				let h1="(($w1*$h1orig)/$w1orig)"
			fi
		else
			w1=$w2
			let h1="(($w1*$h1orig)/$w1orig)"
			
			if [ $h2 -lt $h1 ]; then
				h1orig=$h1
				w1orig=$w1
				h1=$h2
				let w1="(($w1orig*$h1)/$h1orig)"
			fi
	fi
	
	new_video_resize[0]=$h1
	new_video_resize[1]=$w1
	
	if [ $w2 -lt $w1 ] || [ $h2 -lt $h1 ]; then
		new_video_resize=($(resizeVideo $h1 $w1 $h2 $w2))
	fi
	
	echo ${new_video_resize[0]} ${new_video_resize[1]}
}

# ffmpeg_output_file
function getAspectRatio() {
	log=$(cat $1 | grep "PAR")
	if [[ -n $log ]]; then
			check=$(echo $log | grep "\[")
			if [[ -z $check ]]; then
					video_aspect=$(echo $log | awk 'BEGIN{RS=","}/PAR /{print $4}')
				else
					video_aspect=$(echo $log | awk 'BEGIN{RS=","}/PAR /{print substr($5, 0, length($5) -1)}')
			fi
	fi
	echo $video_aspect
}

preferences.avc (edita la risoluzione)

audio_bitrate=128k
video_bitrate=500k
device_height=480
device_width=800

# used for newly SVN builds of FFmpeg ("please use vf=pad") (1=yes)
vf_pad=0

## Acer A1 Liquid, HTC Desire, Nexus One
# => 480x800
## HTC (Dream, Hero, Legend, Magic), Samsung (i5700, i7500)
# => 320x480
## HTC Tatoo
# => 240x320
## Motorola (Droid, Milestone), Sony Xperia X10
# => 480x854

Per favore riportate qualsiasi bug/commento!
Per ora l'ho testato su piccoli file in 16:9, vedete di provare con dei filmati 4:3, formati diversi etc. Teoricamente è anche possibile convertire i filmati di YouTube.

[eafkuor]

Complimenti, deve essere tosto fare una cosa del genere.

[AndroBoz]

Complimenti, lo proverò appena avvio linux.

[nk02]

Ti amo:-) quando passo al PC lo provo!

[AndroBoz]

L'ho provato un po' ma non sono riuscito a fare niente.
Mi dice sempre che l'encoder libfaac è sconosciuto.
Non riesco a installare la libreria libfaac con ubuntu 10.04, ho provato a installarla singolarmente in vari modi dai repository di ubuntu e compilandola dal sito ma niente.

Ho provato a ricompilare ffmpeg abilitando libfaac come avevo trovato su una guida, ma come succede al solito, ora non funziona più nulla.

Tu cosa usi? Hai consigli per farlo funzionare?

[nk02]

devo dire che ho provato solo di fretta, però non ho capito se mi manca qualche dipendenza o se sono un idiota io:

nk02@nk02-desktop:~$ ./avc -i video.avi -d nexus_one
FFmpeg version SVN-r0.5.2-4:0.5.2-1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --disable-encoder=h263 --disable-encoder=h263p --disable-encoder=mpeg2video --disable-encoder=mpeg4 --disable-encoder=msmpeg4v1 --disable-encoder=msmpeg4v2 --disable-encoder=msmpeg4v3 --extra-version=4:0.5.2-1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libfaad --enable-libdc1394 --enable-shared --disable-static
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 1 / 52.20. 1
  libavformat   52.31. 0 / 52.31. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libavfilter    0. 4. 0 /  0. 4. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Jun  3 2010 13:01:17, gcc: 4.4.4
Input #0, avi, from 'video.avi':
  Duration: 00:39:47.96, start: 0.000000, bitrate: 1228 kb/s
    Stream #0.0: Video: mpeg4, yuv420p, 624x352 [PAR 1:1 DAR 39:22], 23.98 tbr, 25 tbn, 23.98 tbc
    Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 160 kb/s
Unknown encoder 'libfaac'
FFmpeg version SVN-r0.5.2-4:0.5.2-1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --disable-encoder=h263 --disable-encoder=h263p --disable-encoder=mpeg2video --disable-encoder=mpeg4 --disable-encoder=msmpeg4v1 --disable-encoder=msmpeg4v2 --disable-encoder=msmpeg4v3 --extra-version=4:0.5.2-1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libfaad --enable-libdc1394 --enable-shared --disable-static
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 1 / 52.20. 1
  libavformat   52.31. 0 / 52.31. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libavfilter    0. 4. 0 /  0. 4. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Jun  3 2010 13:01:17, gcc: 4.4.4
Input #0, avi, from 'video.avi':
  Duration: 00:39:47.96, start: 0.000000, bitrate: 1228 kb/s
    Stream #0.0: Video: mpeg4, yuv420p, 624x352 [PAR 1:1 DAR 39:22], 23.98 tbr, 25 tbn, 23.98 tbc
    Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 160 kb/s
Incorrect aspect ratio specification.
FFmpeg version SVN-r0.5.2-4:0.5.2-1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --disable-encoder=h263 --disable-encoder=h263p --disable-encoder=mpeg2video --disable-encoder=mpeg4 --disable-encoder=msmpeg4v1 --disable-encoder=msmpeg4v2 --disable-encoder=msmpeg4v3 --extra-version=4:0.5.2-1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libfaad --enable-libdc1394 --enable-shared --disable-static
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 1 / 52.20. 1
  libavformat   52.31. 0 / 52.31. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libavfilter    0. 4. 0 /  0. 4. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Jun  3 2010 13:01:17, gcc: 4.4.4
Input #0, avi, from "video.avi':
  Duration: 00:39:47.96, start: 0.000000, bitrate: 1228 kb/s
    Stream #0.0: Video: mpeg4, yuv420p, 624x352 [PAR 1:1 DAR 39:22], 23.98 tbr, 25 tbn, 23.98 tbc
    Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 160 kb/s
Incorrect aspect ratio specification.
FFmpeg version SVN-r0.5.2-4:0.5.2-1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --disable-encoder=h263 --disable-encoder=h263p --disable-encoder=mpeg2video --disable-encoder=mpeg4 --disable-encoder=msmpeg4v1 --disable-encoder=msmpeg4v2 --disable-encoder=msmpeg4v3 --extra-version=4:0.5.2-1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libfaad --enable-libdc1394 --enable-shared --disable-static
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 1 / 52.20. 1
  libavformat   52.31. 0 / 52.31. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libavfilter    0. 4. 0 /  0. 4. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Jun  3 2010 13:01:17, gcc: 4.4.4
tmp-video.mp4: no such file or directory
rm: impossibile rimuovere "*.aac": No such file or directory
rm: impossibile rimuovere "tmp-video.mp4": No such file or directory
rm: impossibile rimuovere "*.log*": No such file or directory

vedo un incorrect aspect ratio specification. io mi son limitato a copiare lo script e i preset, dargli i permessi di esecuzione e dare un "aptitude install ffmpeg mkvtoolnix" per installare le due dipendenze di cui hai parlato

[AndroBoz]

Anche a te da il mio stesso errore.

Unknown encoder 'libfaac'

Penso che il problema sia lì. Ubuntu ha tolto il supporto a questa libreria perchè non è sotto licenza LGPL, almeno così ho letto su internet.

[elegos]

Ecco, sapevo io che non poteva esser perfetto :P I filmati AVI (non so perché) vengono letti con parametri PAR e DAR tra parentesi quadre... fixato nella 1.1

Per libfaac: mi sa che dovete ricompilare FFmpeg (non conosco altre librerie per l'AAC). Ecco i parametri che ha usato MacPorts (ossia: aggiungete le librerie)

configuration: --prefix=/opt/local --disable-vhook --enable-gpl --enable-postproc --enable-swscale --enable-avfilter --enable-avfilter-lavf --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libdirac --enable-libschroedinger --enable-libfaac --enable-libfaad --enable-libxvid --enable-libx264 --enable-nonfree --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/gcc-4.2 --arch=x86_64

Tradotto: copiate la VOSTRA configurazione e inserite tutti i --enable-lib* che vi mancano

EDIT: Ovviamente bisogna avere installato libfaac e libfaac-dev (o come si chiamano)

[pierissimo]

complimenti elegos.
cmq io mi son fatto uno script semplicissimo che utilizza handbrakeCLI, e nessun'altra libreria. Come argomenti prende solo l'elenco dei file da convertire.
Se a qualcuno serve, o secca ricompilare è un'alternativa al completo script di elegos.
Lo trovate qui.

[elegos]

fico, non sapevo esistesse "CLI-only" di handbrake!

Solo che con FFmpeg puoi ottimizzare al midollo la conversione A/V