How to convert webm files to mp3

Bash script:

   FFMPEG_PATH="ffmpeg"

for FILE in *.webm; do

    echo -e "Processing video $FILE";

    ${FFMPEG_PATH} -i "${FILE}" -vn -ab 128k -ar 44100 -y "${FILE%.webm}.mp3";

done;




Asus Chromebook C300 Debian Based Linux System with SeaBios

Install Debian based linux system on Asus C300 Chromebook

See my Git Repo here:

https://github.com/thomas41546/Asus_C300_Linux

Contents of the README.me

## Summary
This repository has essential files for installing a fully functional Asus C300 Chromebook Linux System

## Bios and Install
Remove write-protect screw from Asus C300 Chromebook motherboard, http://www.matws.org/c300/

Get Developer Access on Chromebook

Open Console

Install SeaBios via ./bios/lewis-fw-c300.tar.gz script

Install your OS choice on a USB drive (MBR boot), I used Linux Mint 17.2

Boot into your USB and install it to the MMC 16GB, be very careful not to touch the boot MMC.

## Kernel
Under the ./kernel directory is a bash script that will install Linux 4.4 32 bit, this version has the best support for the C300.

Keyboard, Touchpad, Wifi, Sleep, Screen Brightness, Sound all work if you do the work below with this kernel.

## Sound
Copy the ./sound/fw_sst* files to /lib/firmware/intel/

Copy the ./sound/asound.state to /var/lib/alsa/asound.state

Reboot

## Wifi
Copy ./wifi/iwlwifi-7260-17.ucode /lib/firmware

Reboot

 

Convert mp4 to mp3 using ffmpeg

How to convert mp4 files from youtube to mp3:

find . -type f -name "*.mp4" -exec ffmpeg -i "{}" -b:a 192K -vn "{}.mp3" -n ;

That can be re-run without issue, it will not overwrite files because of the "-n" flag.

Intel Nuc is a great Media Center Computer

Intel NUC Kit D34010WYK The Ultimate Media Center Device

Specifications:

• i3 Haswell Processor
• Intel HD 4400 GPU
• Micro HDMI
• 15W peak power usage

 What is required to get it working:

• TV or Monitor with HDMI
•  Laptop Ram
• Mini PCI express slot for a SSD based storage 

Total Cost:

• NUC - $300
• Ram 4GB - $60
• 256GB Corsair SSD - $150
• Total:
• ~$550 + TV/Monitor

Essentially the processor is an Ultrabook processor in a different form factor. So you get the performance of an Ultrabook, but for much much cheaper.

The Intel 4400 HD GPU is capable of playing most games on low-medium settings:
https://www.youtube.com/watch?v=ysDgUdQLvUk



So after setting up Netflix, ftp server, VLC media player, windows file sharing, snes/n64 emulator. You get a complete media center that is capable of playing movies, games, music off of a local network, while also being capable of playing most games on low-medium settings.

One big bonus for using such a power efficient device is that the peak power usage is 15W and standby is around 2-5W, so your electric bill will not go up by much -- even if you keep the device on all of the time.

Amazon Kindle 3.3 Sound Output FFMPEG

The following command is great for creating sound files for the Kindle:
ffmpeg -i 8bp027-04-nullsleep-playful_panda.mp3 -ar 8000 -ac 1 -acodec pcm_u8 panda.wav

Play the sound with the following:
aplay /tmp/panda.wav
 

Compiling Linux kindle 2.6.26-rt-lab126 armv6l for Kindle 3

Device Supported

These instructions are specifically for the Kindle 3, the kernel version on the original device must be exactly: Linux kindle 2.6.26-rt-lab126 after the 3.3 firmware update from Amazon.

ARM x64 Cross Compile Toolchain

I found and extracted the arm-2008q3 code sorcery tool-chain. (This one is older and most certainly compatible with the kernel verison)

Linux Kernel Source

Get and Extract the linux-2.6.26-lab126.tar.bz2  from Amazon sources (under Kindle 3) Kindle_src_3.3_611680021.tar.gz

Apply kindle-3.3-kernel-buildfix.patch

patch -p1 < ./kindle-3.3-kernel-buildfix.patch

Generate .config file

make imx35_luigi_defconfig

Modify the following config setting to the following

CONFIG_INITRAMFS_SOURCE=""

Setup Build ENV

export ARCH=arm
export CROSS_COMPILE=/home/thomas/workspace/arm-2008q3/bin/arm-none-linux-gnueabi-

Build Script

#!/bin/sh
echo "=============Making make"
make

echo "=============Making uImage"
make uImage

echo "=============Making modules"
make modules

echo "=============Making modules tar at linux-2.6.26-rt-lab126.tar.gz"
make targz-pkg

echo "=============Making modules.dep"
depmod -ae -F System.map -b tar-install -r 2.6.26-rt-lab126 -n > modules.dep

# replace /kernel with /lib/modules/2.6.26-rt-lab126/kernel/
echo "=============Applying /kernel directory remapping"
perl -pi -e 's/kernel\//\/lib\/modules\/2.6.26-rt-lab126\/kernel\//g' modules.dep

echo "=============Outputing uImage, modules.dep and tared modules into ./export directory"
mkdir ./export
cp arch/arm/boot/uImage ./export/.
cp modules.dep ./export/.
cp linux-2.6.26-rt-lab126.tar.gz ./export/. 

Flashing Kernel on Kindle

SCP the ./export folder contents to /tmp/. on your kindle
Extract linux-2.6.26-rt-lab126.tar.gz to /lib/modules
Extract modules.dep to /lib/modules/2.6.26-rt-lab126

chmod 644 /lib/modules/2.6.26-rt-lab126/modules.dep
/test/flashtools/luigi/update /tmp/uImage

How to Setup Perforce Merge p4merge with git in OSX

1. Download P4V.dmg (Perforce Client)

2. Copy the p4merge.app to your /Applications directory

3. Then run the following commands:

git config --global merge.tool p4merge
git config --global mergetool.p4merge.path /Applications/p4merge.app/Contents/Resources/launchp4merge