echo 2048 >/sys/class/rtc/rtc0/max_user_freq
echo 2048 >/proc/sys/dev/hpet/max-user-freq

Reboot, and you should get better performance from things like mplayer.

All you have to do is copy the room name into the Join Chat window, and put in groupchat.google.com as the server.  I hope you find it useful.  If anyone knows how to make this a link that GNOME will throw at Pidgin, let me know.  That would be awesome.

Get the Script

Download the video

This can be done lots of ways, but somehow obtain a version of the video that ffmpeg can read. It can be just about any format. Let’s assume that we get a file called paris.flv.

Convert the video

ffmpeg -i paris.flv -b 500000 -s 176x144 -ac 1 -ab 64000 paris-high.mp4

This will make a nice movie for us to play. Let’s put it on the iPod:

scp paris-high.mp4 root@ipod:/var/mobile/Media/MxTube/

Make the Thumbnail

We need to grab a frame from the middle of the movie. Let’s use mplayer for that!

mplayer -vo jpeg -frames 1 -ss 30 paris.flv

This will make a file called 00000001.jpg. Let’s put that in the right spot:

scp 00000001.jpg root@ipod:/var/mobile/Media/MxTube/paris.thm

Add the video to the Library

Edit /var/mobile/Library/MxTube/VideoLibrary.plist on the iPod. Make a new dict entry in the list like so:

        <dict>
                <key>author</key>
                <string>hank</string>
                <key>duration</key>
                <string>01:50</string>
                <key>high</key>
                <string>/var/mobile/Media/MxTube/paris-high.mp4</string>
                <key>id</key>
                <string>64ad536a6dQ</string>
                <key>thumbnail</key>
                <string>/var/mobile/Media/MxTube/paris.thm</string>
                <key>title</key>
                <string>Paris for President</string>
        </dict>

Just fill in the right filenames for the thumbnail and movie like you used above. Also, change the author to yourself or the original director, and the duration accordingly. Keep the id something random. Also, you can change the display title as the last option there.

Other Pro Tips

Keep in mind that if you want to be able to delete the movie from the interface, you need to change the ownership on all the files to mobile:mobile using chown.

Results!

Well, it totally works, with sound even.

Good luck!

I wanted to put images on my iPod Touch without using iTunes since, as most of us know, there is no good way to use it from Linux. It turns out there is a magic directory on the iPod Touch where it saves images from Safari. I simply looked at how it saved them, and applied it on my box here at home.

Requirements

• Jailbroken iPod Touch (I used WinPWN), with OpenSSH installed and working (the root password is alpine)
• Firmware 2.0 (Though, 1.x may work, I just haven’t tried it)
• A Linux box with a bash shell
• Cool images
• convert and mogrify from ImageMagick installed

Method

These instructions might work for the iPhone as well. YMMV

All of your images must be in the format IMG_XXXX.YYY where XXXX is a number < 9999, and YYY is either JPG or THM (THM is a thumbnail). To rename our files, I use a simple trick I outlined in my last post:

EII=4; for i in *.jpg; do ls $i; \
NEWNAME=IMG_00`printf "%02d" $EII`.JPG; \
echo Renaming $i to $NEWNAME; \
mv $i $NEWNAME; EII=`expr $EII + 1`; done

That will rename all the JPEG files in order from 4 to, in my case, 62. Now, I have to make the thumbnails:

for i in `ls *.JPG | cut -d '.' -f 1`; do \
convert $i.JPG -resize 75x75! $i.THM; \
done

The 75×75! part makes sure they are exactly those dimensions. You end up with something like the following:

IMG_0004.JPG  IMG_0016.JPG  IMG_0028.JPG  IMG_0040.JPG  IMG_0052.JPG
IMG_0004.THM  IMG_0016.THM  IMG_0028.THM  IMG_0040.THM  IMG_0052.THM
IMG_0005.JPG  IMG_0017.JPG  IMG_0029.JPG  IMG_0041.JPG  IMG_0053.JPG
....

Now, note that the iPod can only display images under 100KB (to my knowledge). If your high-res image is too large, it will just display the magnified 75×75, which is really ugly. So, make sure all your images fit that description, and if they don’t, mogrify -resize them until they do (or take other measures as necessary). I used this:

mogrify -resize 400x *.JPG

All my images turned out to be between 30 and 90 KB. This also keeps the aspect ratio, unlike the 75×75!.

Now, SSH into your iPod (if you can’t do this yet, google it). You should have the following file:

/var/mobile/Media/DCIM/.MISC/Info.plist

Open this file in vi, and observe the plist>dict>integer part of the hierarchy:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
        <key>LastFileGroupNumber-100</key>
        <integer>62</integer>
</dict>
</plist>

So, I put 62 in there since the last image I have is numbered 0062. It’s a very simple idea. Now, just load them onto the iPod:

scp IMG_00* root@ipod:/var/mobile/Media/DCIM/100APPLE/

Let’s have a look from the iPod console!

HanksTouch:/var/mobile/Media/DCIM/100APPLE root# ls
IMG_0002.JPG  IMG_0014.THM  IMG_0027.JPG  IMG_0039.THM  IMG_0052.JPG
IMG_0002.THM  IMG_0015.JPG  IMG_0027.THM  IMG_0040.JPG  IMG_0052.THM

Beautiful. Now, to test it…

Premature end of JPEG file

So, this is nice, except it’s entirely unscriptable. The solution I found was using the following script to the display the images in sequence:

perl -e 'for(glob("*.png *.jpg")){$output = `qiv "$_" 2>&1;`; if($output =~ /Premature/){print $_, "\n";}}'

All this does is mix STDERR with STDOUT for a qiv of the file, and check the output for the word “Premature”. If it finds the word, it prints the filename. Simple.

The only problem is that qiv doesnt have a way to just check whether a JPEG file is corrupt (and if there is a command line utility that does, please let me know). To make it go thru the list, I wrote this little gem:

while(true); do xte "key q"; done

All this does is send the q key to the Xserver infinitely. All I have to do is put focus on the first qiv window to make it and all subsequent qiv windows receive q’s. So, just run it, and click on the window. Then there are lots of flashes, and eventually that perl script will print out the names of the bad files. It’s totally ghetto, but it’s the best I’ve got right now. The point of this post is to hopefully find new ways to do this more programmatically.