Updates from July, 2008 Toggle Comment Threads | Keyboard Shortcuts

  • Prasanna 9:03 am on July 12, 2008 Permalink | Reply
    Tags: beach, sunrise, time lapse   

    Sunrise .. 

    Time lapse videos seem to be my latest addiction. Here’s one video of a Sunrise taken today from Elliots Beach.

    Couple of photos from today’s early morning walk can be found at http://caughtonlens.wordpress.com/

     
    • Vikram S V 10:22 am on July 12, 2008 Permalink | Reply

      That was very beautiful video! It would have been much better if only there were fewer clouds. I also think you can make the video play at a little lower value of fps.

    • naveen 11:01 am on July 12, 2008 Permalink | Reply

      Wow!
      This is the most amazing video I’ve ever seen 🙂
      I always wanted to see sunrise on the beach… Thanks 🙂
      Good work.

    • Prasanna 11:25 am on July 12, 2008 Permalink | Reply

      @Vikram
      Thanks. I can’t reduce the FPS further because its already at 8fps
      which is too slow. Problem is that I did not take enough shots. Will
      try that next time

      @Naveen
      Thanks. And you can try searching for Sunrise Time Lapse videos on
      Youtube. Some of them are really good.

    • Akila 12:52 pm on July 12, 2008 Permalink | Reply

      It is very nice that you find time for the little experiments that make life so beautiful 🙂

    • Prasanna 4:26 pm on July 12, 2008 Permalink | Reply

      🙂

    • Akarsh 11:40 pm on July 13, 2008 Permalink | Reply

      Wow!

    • prakash 7:31 pm on July 20, 2008 Permalink | Reply

      Great video, really nice to see a sunrise video 🙂

    • Vinay 12:27 am on July 30, 2008 Permalink | Reply

      Good work!
      Its always nice to see the sunrise… I agree that taking a few more shots would make it even more appealing 🙂

    • prashant 3:11 am on December 16, 2008 Permalink | Reply

      Awesome!!! will love to see your timelapse videos of saarang 🙂

    • rimifooma 8:38 pm on December 9, 2009 Permalink | Reply

      Wow, I didn’t heard about this topic up to the present. Thanx.

  • Prasanna 8:03 pm on July 11, 2008 Permalink | Reply  

    My First Time-Lapse Video 

    I came to know about CHDK recently, which has given my Canon Powershot A540 a complete makeover. I decided to try out a time-lapse video which resulted in this:

     
    • Infy 3:46 am on July 13, 2008 Permalink | Reply

      Nice video 🙂

      And, a great find with CHDK. It’s amazing. Imagine shooting in RAW with a cam in the powershot series, extending exposures to 65s. Thanks 🙂 It’ll be the first thing I’ll be looking into tomorrow.

    • tdmphotography 10:20 pm on September 12, 2008 Permalink | Reply

      Nice idea I keep meaning to try this. Will probs be easier with a DSLR too. Thanks for inspiration.

  • Prasanna 8:45 pm on July 9, 2008 Permalink | Reply
    Tags: beginning, blog, photo   

    My New Photo Blog 

    Here’s the beginning of another long journey.

    http://caughtonlens.wordpress.com/

    First post:

    http://caughtonlens.wordpress.com/2008/07/05/the-beginning/

     
  • Prasanna 7:31 pm on July 5, 2008 Permalink | Reply
    Tags: binary, css, gif, html, image   

    Versatile CSS 

    Today, I learnt that CSS could make this:

    Out of this:

    background-image:url("data:image/gif;base64,R0lGODlhDwAPALMAALOzs/j4+MTExN7e3vDw8MzMzLy8vP///9XV1efn5wAAAAAAAAAAAAAAAAAAAAAAACH5BAAHAP8ALAAAAAAPAA8AAARH8MhJq70S6M07KAR2DIWWGMmFCIF2EEVKIUUGSIQwSEFRBDaKAHEoCGQH16EnMDhpMmVht9q1UhqCYWeBETQxkdZD3ojO6AgAOw==") ;

     
    • arunchaganty 1:14 am on July 6, 2008 Permalink | Reply

      I think that is valid for any image as well. So the much longer:

      Would show the ArchLInux logo.

    • arunchaganty 1:15 am on July 6, 2008 Permalink | Reply

      Ah, WordPress didn’t accept it. Here:
      I think that is valid for any image as well. So the much longer:

      Would show the ArchLInux logo.

    • arunchaganty 1:16 am on July 6, 2008 Permalink | Reply

      I’m sorry for cupping so many times.
      Delete my old failures.
      “data:image/png;base64,
      iVBORw0KGgoAAAANSUhEUgAAAFAAAAAPCAYAAABzyUiPAAAABmJLR0QAAAAAAAD5Q7t/AAAACXBI
      WXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH1AsYAwg6q5VXGwAAAB10RVh0Q29tbWVudABDcmVhdGVk
      IHdpdGggVGhlIEdJTVDvZCVuAAACqUlEQVRYw+2Y3UtTYRzHP+dFXc1p6maQNl2lmJniHAPrJsug
      O4lgeFvQvPI/MLzZf+DV/oUFgSBFsKggJMTKUMnXXM2arJzHZdt82+nCZvO4F9/IoH2vzvN7nt/h
      eT58f+f8zhGcTqdKTgeWDOB2u3MkDqCurq4tgADdrn4ASopPsLQcBUBXIFNafBJRFFhUIkRj6//E
      xvt6OvB6vce6h/b29j8OTFYCXn6exI0rtdRdOI0siYxNBRgcnmMpHM1ZT1vCqWRvMmNtqESSRACa
      6yvZ3Izz4vUMsdWNHLnfElMFz5nLsDWat+EByLJIy+Wz1FhMRH+G2dxYz1hifT0dKWPaeKb1qa5T
      yeFwZIxp59PN7TUnI8D8PIlai4miQh2qqhJeieGbD6GEo8iSiL3JjKlMz+jQE5TvX1PC6Hb10+3q
      33XwVPFM649S6QCkk8fj2c5xOBx4PJ69lXBRoY7qylJEUSAQDON9NcmiEsGgL+CqzcL5KiMmYxkz
      44PMTQxx+54rJcR0zkx+YWmljR8l0ASQdCAOmrPLgeVGA+VGA5HoGg8fjzD7eRElHMUfUBh4No7P
      H8LaUEEo6Ic0HWTCUdkAZQOf7j6Hhbgf12bL2QWwqqIEURB4OzZPSInsmAuFFB49fU/vg15OlZ3B
      fr1z34fQlmpinCjlw5ToXuBo3ZQApHVa8jgTRMHpdKput3t78/c7Wyky6PAMvMMfUABQ43F8U8NM
      jDyn0XaN0TcvsbbewlhxCVGS/ts+cEcjnZCxVM+07xvLP6KEgn4W/JMEv0yj0xdT33KTTx/HuHO3
      B0kUCa/Ecn2gNjAxG+TDzAKx1TUkWcZy0U5dcxuiuOW0qhorsdV1ZEnMNYHJABPPpbiq0marRhCE
      jImqqmZd8zc+pY5bQu5vzOH0C2jxKDzqBF7KAAAAAElFTkSuQmCC

  • Prasanna 5:48 pm on July 5, 2008 Permalink | Reply
    Tags: convert, ffmpeg, format, ipod, mobile, movie, nokia, video   

    Movies for Mobile Phones / iPods 

    Want to watch your favourite movies on your iPod or mobile phone ? (Great for long journeys) And are you a Linux user ? Read on.

    (Windows / Mac users might as well use the software that comes with the mobile phone / iPod)

    Most of the phones / iPods play videos in MPEG – 4 format and sounds in AAC format. So, all we we need to do is to convert a video into MPEG – 4 with sound encoded as AAC.


    Step 1: Get ffmpeg code


    According to the ffmpeg project website, “SVN snapshots work really well 99% of the time so people are not afraid to use them”. So, we checkout their SVN repository

    $ svn checkout svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg


    Step 2: Compile


    Before compiling, we need to set proper compile options.

    $ cd ffmpeg/
    $ ./configure --enable-gpl --enable-pthreads --enable-libvorbis --enable-liba52 --enable-libgsm --disable-debug --enable-shared --enable-libfaac --prefix=/usr/local

    Now, compile

    $ make
    $ sudo make install


    Step 3: Convert


    Convert the video file of your choice to the MPEG -4 / AAC format.

    $ ffpeg -i some_video.avi -s 320x240 -ab 32000 -b 64000 output.mp4

    • 320×240 is the screen size for my mobile phone (Nokia 6233) and for a standard iPod (I think)
    • -ab 32000 signifies the the output audio bitrate.(32 kbits/s)
    • -b 64000 signifies the output video bitrate (64 kbits/s)

    You can experiment with the two features above. I found these to be the ideal values, the opposing factors being quality and file size.

    You can use the following command for a Widescreen format movie. (16:9 types)

    $ ffpeg -i some_video.avi -s 320x180 -padtop 30 -padbottom 30 -ab 32000 -b 64000 output.mp4

    Suppose the audio doesn’t get encoded in AAC format by default, one can also try adding the option -acodec libfaac or -acodec aac.


    Step 4: Transfer


    Transfer the the output video to your phone / iPod and enjoy!

     
    • homothety 5:53 pm on July 5, 2008 Permalink | Reply

      A very nice and useful tutorial 🙂

    • arunchaganty 6:23 pm on July 5, 2008 Permalink | Reply

      A question, does on have to use the svn version? Would an existing build work?

      A clarification, is it ffpeg or ffmpeg? (the cmd line tool)

      And finally, thanks! Finally, I’ll be able to put movies onto my IPod.

    • Srinidhi 11:20 pm on July 9, 2008 Permalink | Reply

      Hey, nice post. But, you can as well switch to an open source OS for your IPod. I use Rockbox on my Ipod and i don’t need to convert anything to AAC for it to work. The loading into the IPod takes very less time and very much works like a Flash memory, the OS is exactly like any distro with a lot of options. Just google it and read about it if you have the patience, MAC OS X is good, but I think this is equally good.

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