Category: Computer Science

All my coding, modding … projects

Android-x86 Honeycomb 3.2 for Acer1825 series – Beta 3 (Acer 1825, 1820, 1425, 1420 and compatible Packard Bell)

ICS beta 1 is out please step forward to this release! http://www.ceh-photo.de/blog/?p=464

So it takes some/a lot of time to develop this new build (more like expected like every time), but I tried to put as much as possible into beta3. But I struggled hard with the integration of something like a slider mechanism on a phone, if you change from tablet to laptop mode and vice versa. My goal was automatically disabling/enabling onscreen keyboard and locking screen rotation in laptop mode, but it seems like this is one of these things which are not really well implemented in honeycomb and may a reason why google published that code so late (google sayed some things are really hacked together in honeycomb… and if I compare responsible files in honeycomb and ics there are a lot of changes and commented dead code in honeycomb). So the result is, I got really deep in touch with android internals, but I could not solve the problem and decided to step back and publish my new beta 3 without this feature, because I had already done a lot (see below). Inside the tips and information sections I will try to answer some unanswered questions from comments. read more

Streaming HD video to low performance devices with UPNP server mediatomb (Watching HD mkv on XBMC4XBOX on X-Box classic)

I have figured out a solution for watching HD videos on my old XBOX classic. This attempt should work also for other low performance devices which are not able to render HD media standalone.

The basic idea is using UPNP (because many devices are able to use it) and an UPNP server which supports live transcoding of the media. I choose mediatomb on my debian desktop system(also available for windows…).

After you have installed mediatomb you need add some directories/media`s with the web-interface. I think it is not necessary to explain that step, because its quite easy. If someone needs support please ask. After you have added some media with HD content, in my case some movies inside MKV containers, you need to edit the configuration.

On debian mediatomb configuration is stored in /etc/mediatomb/config.xml. Open this file with an editor and do following changes inside the transcoding section. Changes are marked bold. <transcoding enabled=”yes“>

<mimetype-profile-mappings> <transcode mimetype="video/x-flv" using="vlcmpeg"/> <transcode mimetype="application/ogg" using="vlcmpeg"/> <transcode mimetype="application/ogg" using="oggflac2raw"/> <transcode mimetype="audio/x-flac" using="oggflac2raw"/> <transcode mimetype="video/x-matroska" using="vlcmpeg"/> </mimetype-profile-mappings> <profiles> <profile name="oggflac2raw" enabled="no" type="external"> <mimetype>audio/L16</mimetype> <accept-url>no</accept-url> <first-resource>yes</first-resource> <accept-ogg-theora>no</accept-ogg-theora> <agent command="ogg123" arguments="-d raw -o byteorder:big -f %out %in"/> <buffer size="1048576" chunk-size="131072" fill-size="262144"/> </profile> <profile name="vlcmpeg" enabled="yes" type="external"> <mimetype>video/mpeg</mimetype> <accept-url>yes</accept-url> <first-resource>yes</first-resource> <accept-ogg-theora>yes</accept-ogg-theora> <agent command="vlc" arguments="-I dummy %in --sout #transcode{venc=ffmpeg,vcodec=mp2v,vb=4096,fps=25,aenc=ffmpeg,acodec=mpga,ab=192,samplerate=44100,channels=2}:standard{access=file,mux=ps,dst=%out} vlc:quit"/> <buffer size="14400000" chunk-size="512000" fill-size="120000"/> </profile> </profiles> </transcoding> read more

Android x86 Multiboot with Win7 and Ubuntu on Acer1825

Most of you know that nice Androidx86 release from arobase for the Acer1825, but a lot of you asked for installation on hard-disk. I have done it and here comes, how it works:

First my start configuration: I had a installation of Windows7 (seldom used) (NTFS) and Ubuntu 10.10 on LVM(ext4), no free space for a new partition. read more