english Howto photography video

miniature time-lapse with fake tilt shift (howto)…

i recently came across some videos that took my breath. tilt shift time-lapse videos. they produce kind of a miniature look combined with a stop motion and time lapse feature that was just nice.

of course i wanted to make one 🙂

here is how:

OnlineLife Net Webapps Software video

[video] Willkommen bei Facebook…

viel besser kann man es nicht auf den punkt bringen. ich kann kaum offene alternativen, die man selbst hosten kann, erwarten.

alexander lehmann hat schon ein paar so geniale filmchen gemacht. ich fand auch karls posting zu dem thema sehr lesenswert.

english Hardware Gadgets Howto Motoriges video

How to make time-lapse videos on a motorcycle…

a few weeks ago i got my hands on a motorcylce camera stand (thx Patrick). one that was actually made for a motorbike and not a modified tankbag with rubber wraps. please don’t ever use those and please do never put a camera into your helmet as some youtube idiots present.

the camera i used is my canon ixus 750. since the lense on this camera is rather low i had to improve the camera stand. i added some aluminum ducts to make it higher and to make the camera see the street. about 7 centimeters were enough.

since i was not able to get the CHDK timelapse to work i shot video. to generate a timelapse i used ffmpeg to extract images out of the video and to unite them to a timelapse video.
using this tutorial and the man pages i was able to come up with this:

# sample usage: ./ input.avi output.mp4
mkdir ffmpeg_temp
ffmpeg -i $1 -r 1.4 -f image2 ffmpeg_temp/%05d.png
ffmpeg -i ffmpeg_temp/%05d.png -sameq $2
rm -rf ./ffmpeg_temp

note that it is important for ffmpeg to have the images you use to generate the timelapse video in order and sequenced. if you decide to delete some images you have to rename them and must not leave gaps.
also you may have to vary the rate (i used: 1.4) acording to the speed of your input video and the speed of the output video you want to have.

one step i did between extracting and generating the timelapse was sending it through imagemagick to blend the speedometer. using info from this mailing list:

#usage: IN.file OUT.file center_x_coord center_y_coord border_x_coord border_y_coord
convert $1 \( -clone 0 -scale 10% -scale 1000% \) \
\( -clone 0 -gamma 0 -fill white \
-draw "circle ${3},${4},${5},${6}"\
\) -composite $2

of course this has to be done for every image 😉

and here is the resulting video:

Hardware Gadgets video

linux am ipod nano…

es ist mir mit hilfe von ipod linux und einem guten tutorial gelungen auf meinen nano ein linux zu spielen. der vorteil?
naja, jetzt kann ich mir auch videos anschauen. leider nur unkomprimierte varianten. d.h. eine halbe stunde kommt auf etwa 1,1 gigabyte.
spiele laufen auch recht gut.
musik abzuspielen geht leider nicht so fein wie unter der original firmware.
auch funktioniert die shell nicht wie sie soll.
alles in allem nett videos schaun zu können aber nur eine kleine spielerei 🙂

english version 😉
since there were a lot of downloads of my little video [ mirror 1]*
[ mirror 2]* , and not everybody does speak german, i decided to translate a bit.

i was curious about how linux on ipod would be. and ipodlinux is just supporting 1-3G ipods. so i first gave up the thought of installing linux on my nano which is apparently one of the 5thG.
i read that some guys did manage to do it anyhow. and then i just tried. thanks to this little how to. well that worked whit some twisting.
the next step was video. i encoded a video and then put it on my nano.
it worked great. although this half an hour shorty did take 1.1 gigabytes of memory since the nano doesn’t support compressed video (yet).
it seems that the big encoded video does have little problems with synchronous sound and video in the last part. you can see that in the video, when i wind the video forward.
sound does work. for video as well as for mp3 files (other formats not yet tested).

what does work:
-games. 🙂
-music playback (filebrowser)
-video playback (uncompressed only)

what does not work with the nano:
-doom does work, never the less there seems to be a little problem with the keylinking.
-the ‘music’ section does show the categories, but no content and whenever i try to enter the linux idles.
-the clock seems to reset everytime i reboot.

links zum thema:
ipodlinux – Video Player
Installationsanweisungen für den nano / how to install on the ipod nano

follow ups: 😉
MacPress (brasil)
and others i wasn’t even able to read, because of the charsets (since i don’t speak russian or thai)

*EDIT: it seems mirror servers are unlasting. although the video is just a ‘quotation’ youtube took it off. and i guess so did