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'''NOTE:''' ''Nero recently released a version of their encoder that is linux native, but I haven't updated my script for it since I actually rarely use it now, I've been using dbPowerAmp at work...'' | '''NOTE:''' ''Nero recently released a version of their encoder that is linux native, but I haven't updated my script for it since I actually rarely use it now, I've been using dbPowerAmp at work...'' | ||
− | Recently [http://www.nero.com Nero] released their wonderful [http://www.nero.com | + | Recently [http://www.nero.com Nero] released their wonderful [http://www.nero.com/eng/nero-aac-codec.html AAC encoder] for "DOS" (command line app in windows). Since I'm a huge fan of AAC for compressed audio due to its quality I was hoping they'd release a linux version, but as it turns out their windows version was designed to work a-o-k in linux under [http://winehq.com WINE]! |
The only caveats I've found is that you need to have the folder where you music ready for conversion is mapped as a drive in Wine. As well, the filenames cannot have any periods in them except for the one that designates the extension (ie ''this.song.is.good.flac'' is no good but ''this song is good.flac'' is fine), which is an issue I know how to solve with a simple perl rename, but have yet to tackle in the script... Other than that, your good to go. | The only caveats I've found is that you need to have the folder where you music ready for conversion is mapped as a drive in Wine. As well, the filenames cannot have any periods in them except for the one that designates the extension (ie ''this.song.is.good.flac'' is no good but ''this song is good.flac'' is fine), which is an issue I know how to solve with a simple perl rename, but have yet to tackle in the script... Other than that, your good to go. |
Revision as of 13:25, 3 November 2007
Contents
Me
My Life
I am as of March 2006 an electrical engineer for Parsons in Boston, MA. I help design manufacturing and lab facilities for pharmaceuticals.
I can be reached for mythtv purposes at adeffs_dot_mythtv_at_gmail_dot_com.
My Myth Contributions
I don't really code, but I try to be active in bug and feature testing.
TVRage.com
I developed a TV.com import perl script for adding archived shows to the Watch Recordings DB. I've received help from folks on the myth mailing lists in this project (see source for a roll call).
- I recently updated it for TVRage.com importing. The new version can be found here (tvragegrab).
- I've recently been informed of a bug in which the same file can be added twice due to the random chanid generation. I'll be looking into this shortly, but if anyone knows of a quick fix drop me an email =)
6200changer.sh
I wrote a script for handling my DCT-6200 cable boxes connected via firewire that changes the channel and uses firewire_tester to stabilize the connection before Myth tries to record. This has, in the first 7 days of operation (at the time of writing this, the period I've used it) allowed me to not fail in recording a single show.
To use, set it up in mythtv-setup as the channel change script. Give it the GUID of the box as shown in mythtv-setup. The script takes two variables, the first being the GUID (which is why you have to specify it) and the second is the channel number (which mythtv automatically feeds it at the end of the command you give it). The script then changes the channel on that GUID and runs firewire_tester. In running firewire_tester it requires that it show the connection is stable twice. If it iterates 10 times it will automatically re-tune the channel, and after 50 attempts total it will send Myth the "failed" result, otherwise it will send Myth the "success" result.
You can change the script to use another channel changer if you require.
#!/bin/bash # GUID=`echo "$1"|sed -r "s/[A-Z]+/\L&/g"` CHANNEL=$2 NODE=`plugreport | grep $GUID | awk '{if (($1 == "Node") && ($4 == "'"0x$GUID"' ")) print $2}'` echo "Node: '$NODE'" echo "Changing to channel $CHANNEL" 6200ch -v -s -g $GUID $CHANNEL #maybe a pause is needed? sleep 4 STABILIZE="1" COUNT=0 TOTALCOUNT=0 STABLECOUNT=0 echo "Stabilizing Firewire Connection!..." #maybe an initial run followed by a verification run? #initial run firewire_tester -B -r2 -n$NODE #while [ "$STABILIZE" != "Broadcast Fix: Success (already stable)" ] while [ $STABLECOUNT -lt 2 ] do STABILIZE=`firewire_tester -B -n$NODE|grep "already stable"` if [[ "$STABILIZE" != "Broadcast Fix: Success (already stable)" ]] then echo "Not Stable! Attempt $COUNT" ((COUNT+=1)) ((TOTALCOUNT+=1)) if [ $TOTALCOUNT -gt 50 ] then echo "FAILED to Stabilize!!" exit 1 fi if [ $COUNT -gt 10 ] then 6200ch -v -s -g $GUID $CHANNEL COUNT=0 firewire_tester -B -r2 -n$NODE fi else echo $STABILIZE ((STABLECOUNT+=1)) fi done echo "Stable!" exit 0
My Systems
I have Comcast cable here in Boston. I use QAM for my HD and have two DCT-6200 digital cable boxen. My area has heavy 5C DRM enabled making firewire capture pretty pointless. So I use one connected to a PVR-150 for recording all the channels I get and the other is connected directly to my TV for HD use. It is also connected to my remote frontend via firewire and can be used for capture, which I've started doing now. Eventually I hope to replace them with two better quality 1000bT switches so this is no longer an issue).
Current Dedicated Back End
Running SVN trunk 14542 as of 10-October-2007
- Norco RPC-810 4U Rackmount Chassis (wonderful!!)
- MSI K8N Neo2 Platinum
- AMD Athlon 64 3200+ 2000MHz HT Socket 939 Venice Core
- 1024MB Corsair DDR400 RAM
- Antec TruePower 2.0 TP2-550 EPS12V 550W Power Supply
- Adaptec 2940U2W SCSI Controller Card
- Maxtor Atlas10K III U320 18GB - System Drive
- Recordings and General Storage Drive RAID 5, 1.4TB
- 2x Maxtor 7L300R0 (ATA)
- 2x Maxtor 7L300S0 (SATA)
- 2x Western Digital WD3200JD-60KLB0 (SATA)
- Tuners
- 1x pcHDTV HD3000
- 2x Avermedia A180 HDTV Tuner
- 2x Hauppauge WinTV-PVR-150 MCE with a Motorola DCT-6200 Digital Cablebox controlled via firewire.
Current Dedicated Front End
Running SVN trunk 14542 as of 10-October-2007
- Silverstone SST-LC16S-M Silver
- ECS KN1 Extreme Socket 939 NVIDIA nForce4 Ultra ATX AMD Motherboard
- AMD Athlon 64 X2 4200+ Toledo 2.2GHz Toledo Core, overclocked
- Antec TruePower 2.0 TP2-550 EPS12V 550W Power Supply
- 1024MB Corsair DDR400 RAM
- MSI NX6200TC-TD128ELF GeForce 6200TC 128MB DDR 64-bit PCI Express x16 Low Profile Video Card Running the Nvidia 9746 driver with Option "UseEvents" "True" and Xvideo Vsync enabled in nvidia-settings.
- SEAGATE ST340014A 40GB system drive
- 6x500GB SATA RAID5 TV Rips, HDTV conversions, music, etc (2.3TB total)
- 1x320GB unconnected SATA ripped movies, HDTV movies (need to copy to above RAID)
Current Bedroom Frontend
My laptop, I accidentally killed my old CPU....
Encoding
I've become somewhat of a mencoder/BASH scripting guru through my many adventures using it and writing scripts. Hopefully, one day, MythArchive will allow for custom profiles with some of the better options/features of mencoder so that such scripts are no longer needed. But for now here are some of the scripts I've written for encoding...
So here are some of my encoding scripts. If you like them feel free to drop me an email (adeffs_dot_mythtv_at_gmail_com) and let me know. If you have some improvements drop me an email as well and I'll update the script here and give you a little shout-out!
HR.HDTV script
I wrote this script to create my own versions of what "the scene" calls HR.HDTV encodes. These look decent on HDTV's up to about 50". Beyond that I highly recommend using x264 at 720p encodes. It may take a lot more processing to get done, but if your TV is that big you'll thank me for recommending it.
So what this script does is convert any 1080i or 720p recording to "HR.HDTV" which is basically a 960x544 resolution file with the original AC3 soundtrack. It will encode to the CD size standard of putting one hour of tv on a CD (ie 44minutes into 700MB, 22minutes into 350MB). It's also a good start to doing other conversions as the options can easily be changes to do things like encode to x264 at 1280x720(hint hint)...
You will need PerlCalc for some math in the script...
#!/bin/bash # # My script to create hr.hdtv encodes. # # This script will perform the following tasks: # 1. Analyze the original mpeg for # a. play length # b. audio size # c. frame speed (60fps/30fps) # 2. Calculate final file size (350MB or 700MB) # 3. Calculate final video size based on final file # size and audio size. # 4. Encode. # #variables overheadbytes=16 server_default=POT #Functions #Video Length Calculation function VideoSizeCalc() { audiosize=`pc $audiobitrate/1000*$totalseconds*0.1220703125/1024` echo "Audio Size in MB = $audiosize" # audiooverhead=`pc $totalseconds*1000/64` # videooverhead=`pc 23.976*$totalseconds` # totaloverhead=`pc $audiooverhead+$videooverhead` # overheadsize=`pc $totaloverhead*$overheadbytes/1024**2` # overheadsize=`echo `${overheadsize:0:4}`` # echo "(DD) Overhead = $overheadsize MB" totalseconds=`echo $totalseconds|sed -e 's/\.[0-9]*//'` # echo "(DD) Total Seconds = $totalseconds" if [ $totalseconds -lt 1800 ]; then totalsize=350 elif [ $totalseconds -lt 3600 ]; then totalsize=700 else echo "I don't know how to handle this length!" exit 1 fi echo "Total Size = $totalsize" # videosize=`pc $totalsize-$overheadsize-$audiosize` #original formula videosize=`pc $totalsize-$audiosize` # new one since overhead doesn't #really matter its so small videosize=`echo `${videosize:0:3}`` echo "Videosize = $videosize MB" } function FolderNameClean() { input=$1 input=`echo "$input" | sed -e 's/.[Aa][Vv][Ii]//'` input=`echo "$input".XviD-MythTV` folder_name=$input } #test for arguements if [[ -z "@ARGV" ]]; then echo "first arguement is the original mpg" echo "second arguement is the new folder name, will be used for filename" exit else #Reassign variables if [[ ! -e $1 ]]; then echo "no such input mpg!" exit else original_name=$1 fi folder_name=$2 FolderNameClean $2 file_name=`echo "$folder_name" | tr A-Z a-z` # display arguments echo "Original mpeg is: $original_name" echo "Folder name will be: $folder_name" echo "File name will be: $file_name" fi #Grab input file information echo "Determining total file length..." totalseconds=`mencoder $original_name -ovc copy -nosound -o /dev/null -quiet 2>&1 | awk '/^Video stream:/{print $10+$10/$12}'` echo "total seconds = $totalseconds" audiobitrate=`mplayer -vo null -ao null -frames 0 -identify "$original_name" 2>/dev/null | grep "ID_AUDIO_BITRATE" | sed -e 's/ID_AUDIO_BITRATE=0//' | grep "ID_AUDIO_BITRATE" | sed -e 's/ID_AUDIO_BITRATE=//'` echo "audio bitrate = $audiobitrate" videowidth=`mplayer -vo null -ao null -frames 0 -identify "$original_name" 2>/dev/null | grep "ID_VIDEO_WIDTH" | sed -e 's/ID_VIDEO_WIDTH=//'` videoheight=`mplayer -vo null -ao null -frames 0 -identify "$original_name" 2>/dev/null | grep "ID_VIDEO_HEIGHT" | sed -e 's/ID_VIDEO_HEIGHT=//'` videofps=`mplayer -vo null -ao null -frames 0 -identify "$original_name" 2>/dev/null | grep "ID_VIDEO_FPS" | sed -e 's/ID_VIDEO_FPS=//'` videofps=`echo `${videofps:0:2}`` echo "FPS: $videofps" aspect=`pc $videowidth/$videoheight` aspect=`echo "$aspect" | tr -s [:digit:]` echo "Aspect Ratio: $aspect" #Calculate Video size VideoSizeCalc sleep 10 videosize=`pc $videosize*1024` echo "Videosize = $videosize" if [[ -e "$original_name" ]]; then echo start `date +%H:%M`>$file_name.runtime if [[ "$videofps" -eq "59" ]]; then nice -n 17 mencoder $original_name -oac copy -ovc xvid -vf decimate=2:1000:1600:.001,scale=960:544 -ofps 24000/1001 -xvidencopts pass=1:vhq=0:me_quality=5:turbo:quant_type=mpeg:aspect=$aspect:max_bframes=0:bitrate=-$videosize -o /dev/null # nice -n 17 mencoder $original_name -oac copy -ovc xvid -vf decimate=2:1000:1600:.001,scale=960:544 -ofps 24000/1001 -xvidencopts pass=2:quant_type=mpeg:aspect=$aspect:max_bframes=0:bitrate=-$videosize -o $file_name.avi elif [[ "$videofps" -eq "29" ]]; then nice -n 17 mencoder $original_name -oac copy -ovc xvid -vf pullup,softskip,scale=960:544 -ofps 24000/1001 -xvidencopts pass=1:vhq=0:me_quality=5:turbo:quant_type=mpeg:aspect=$aspect:max_bframes=0:bitrate=-$videosize -o /dev/null # nice -n 17 mencoder $original_name -oac copy -ovc xvid -vf pullup,softskip,scale=960:544 -ofps 24000/1001 -xvidencopts pass=2:vhq=0:me_quality=5:quant_type=mpeg:aspect=$aspect:max_bframes=0:bitrate=-$videosize -o $file_name.avi fi echo stop `date +%H:%M`>>$file_name.runtime echo "Runtime" more $file_name.runtime fi exit
NeroAAC in linux
NOTE: Nero recently released a version of their encoder that is linux native, but I haven't updated my script for it since I actually rarely use it now, I've been using dbPowerAmp at work...
Recently Nero released their wonderful AAC encoder for "DOS" (command line app in windows). Since I'm a huge fan of AAC for compressed audio due to its quality I was hoping they'd release a linux version, but as it turns out their windows version was designed to work a-o-k in linux under WINE!
The only caveats I've found is that you need to have the folder where you music ready for conversion is mapped as a drive in Wine. As well, the filenames cannot have any periods in them except for the one that designates the extension (ie this.song.is.good.flac is no good but this song is good.flac is fine), which is an issue I know how to solve with a simple perl rename, but have yet to tackle in the script... Other than that, your good to go.
So what I did, is I wrote a script that will convert any format mplayer supports, as well as APE to M4A. Right now I really only have it setup for WAV, FLAC and APE though, but its pretty easy to add other formats. For mplayer supported formats look at the FLAC functions, for formats that require another decoder to get to WAV look at the APE section. This script can also recursively enter folders, so you can rip a whole lot of CD's (using cdparanoia or EAC under WINE of course!) into seperate folders and run this script from their root and it will go into each folder and convert! how handy!
This site has some great info on the encoder, as well as how to encode directly to M4A when ripping with EAC. This is a good guide to do the same in K3B.
This script has two command line options as of now. First it will allow you to delete the original after a successful encode using -e, or you can specify a specific directory with -d.
This script also has some defined options near the top, EncoderDir=~/.wine/drive_c/Program\ Files/Nero QualityLevel="0.8"
EncoderDir is obviously where your neroAACenc.exe file is, and Quality level is a numerical value for the recording quality setting. I don't like compressed audio and find that 0.8 is a good balance for my ears and my desire to keep file sizes down. This equates to about 300Kbps, which is rather large for even the MP3 format, so feel free to change this value for your needs.
For those that used the old Nero encoder with "Quality Levels", here's a quick conversion chart...
Old Presets | Quality Levels |
Tape | -q=0.0 |
Radio | -q=0.1 |
Internet | -q=0.2 |
Streaming | -q=0.3 |
Normal | -q=0.5 |
Extreme | -q=0.6 |
Audiophile | -q=0.8 |
Transcoding | -q=1.0 |
#!/bin/bash # # IFS=$'\n' EncoderDir=~/.wine/drive_c/Program\ Files/Nero QualityLevel="0.8" CURRENTDIR=`pwd` directory=$CURRENTDIR function Main() { until [ -z "$1" ] do echo "Processing parameter of: '$1'" if [ ${1:0:1} = '-' ]; then tmp=${1:1} # Strip off leading '-' . . . parameter=${tmp%%=*} # Extract name. if [ "$parameter" = "e" ]; then echo "Will erase originals upon successful encode!" opt_e=1 fi if [ "$parameter" = "d" ]; then directory=$1 echo "Directory taken from command line as: $dir ectory" fi fi shift done echo "Working directory: $directory" for dir in $( find -type d ) do cd $dir for file in $( find -maxdepth 1 -type f -name '*.flac' -printf '"%f"\n'| sort ) do echo "FLAC format found! Converting \""$file"\"..." rename 's/\.{2,}//' $file file=`echo "$file"|sed 's/\.{2,}//'` basename=`echo "$file"|sed 's/\..*//'` basename=`echo "$basename"|sed 's/\"//'` RANDOM='time' TEMPFILE=/dev/shm/neroaac-$RANDOM DecodeMplayerSupported $basename.flac $TEMPFILE EncodeToAAC $basename $TEMPFILE rm -f $TEMPFILE RemoveOriginal $basename flac ls *flac done for file in $( find -maxdepth 1 -type f -name '*.wav' -printf '"%f"\n'|sort ) do echo "File "$file" already in Wave format, converting to AAC..." basename=`echo "$file"|sed 's/\..*//'` basename=`echo "$basename"|sed 's/\"//'` EncodeToAAC $basename RemoveOriginal $basename wav ls *wav done for file in $( find -maxdepth 1 -type f -name '*.ape' -printf '"%f"\n'|sort ) do echo "APE format found! Converting \""$file"\"..." basename=`echo "$file"|sed 's/\..*//'` basename=`echo "$basename"|sed 's/\"//'` RANDOM='time' TEMPFILE=/dev/shm/neroaac-$RANDOM DecodeAPE $basename.ape $TEMPFILE EncodeToAAC $basename $TEMPFILE rm -f $TEMPFILE RemoveOriginal $basename ape ls *ape done cd $CURRENTDIR done exit 0 } function DecodeAPE() { inputfile=$1 outputfile=$2 nice -n 17 mac $inputfile $outputfile -d } function DecodeMplayerSupported() { inputfile=$1 outputfile=$2 nice -n 17 mplayer -vc null -vo null -ao pcm:file=$outputfile:fast "$inputfile" } function EncodeToAAC() { filebase="$1" infile="$filebase".wav outfile="$filebase".m4a if [ "$2" ]; then infile="$2" fi echo "File base: $filebase" echo "TEMPFILE: $2" echo "Input File: $infile" echo "Output File: $outfile" nice -n 17 wine $EncoderDir/neroAacEnc.exe -q $QualityLevel -if "$infile" -of "$outfile" if [ $? -eq 0 ]; then echo "Encode Success!" success=1 # mv tmp.m4a "$outfile" else echo "Encode Failed!" success=0 # rm -f "tmp.m4a" # rm -f "tmp.m4a" fi } function DiscoverFormat { input=$1 } function RemoveOriginal { origfile=$1 extension=$2 if [ $opt_e -eq 1 ]; then if [ $success -eq 1 ]; then echo "Removing Original file: $origfile.$extension" rm -f $origfile.$extension else echo "Not Removing Original file!" fi fi } Main $@