[Rock-dev] Avi export for log files

[Matthias Goldhoorn]

Just had a quick look on the orogen-video_streamer.

I think an mix between this component and the video_writer will be the 
best solution.
If you want to do something in this area please combine (and test) botth 
librarys.
It would be very helpful then to have an "rock-movie-creator" command 
which does the logfile conversion.

An extension have to be done on every component.


Matthias


On 24.06.2013 13:26, Matthias Goldhoorn wrote:
> To add one other library i trow this software into the pool:
>
> http://spacegit.dfki.uni-bremen.de/dfki-image-processing/video_writer
>
> This is not used too for a longer time but worked in the past.
> I only adapted this once, not sure if this still work,
>
> I think there is a lot of intreest in an generiv video-exporter but a
> usal there are no real rescources availible for such  an "helper tool".
>
> Feel free to inplement/extend something in coop with us developers.
>
> Greetings,
> Matthias
>
> On 24.06.2013 13:16, Fabian Franzen wrote:
>> Hmm, i am not sure if this is the optimal solution... When I create a
>> presentation quickly at 1 o'clock in the morning i normally doesn't want
>> to look up ffmpeg commands or write a script to connect some exisiting
>> tasks to do video encoding. ;-)
>>
>> I took a quick lock at the source code and noticed that rock-export
>> uses the frame helper to export the images using opencv. OpenCV also
>> provides a nice way to export and encode multiple pictures as mpg or
>> h264 video...
>>
>> Is there interest in a patch for rock-export that adds a way to
>> directly export camera pictures to an h264 or mpg avi? If there is some
>> interest, then i will try to add it ;-)
>>
>> Regards,
>> Fabian
>>
>> Am 2013-06-21 08:32, schrieb Steffen Planthaber:
>>> Hi,
>>>
>>>    After you got the export of several frames, from rock-export giving
>>> i.e. --start 0 --end 100, you can use ffmpeg to put them together in
>>> any format. ffmpeg (mplayer) supports it by using the "image2" format
>>> as input for ffmpeg:
>>>
>>>    $>   ffmpeg -f image2 image%02d.png out.mpg
>>>
>>>    puts together all images with a two digit number image01.png,
>>> image02.png
>>>
>>>    You'll need leading zeros for a correct order in the video.
>>>    I don't knot the output filename of rock-export, but the "%02d" is
>>> for two digit numbers, %03d for three.
>>>
>>>    For bitrates, resolution and stuff see the ffmpeg manual.
>>>
>>>    Best,
>>>    Steffen
>>>
>>>    Am 21.06.2013 00:35, schrieb Fabian Franzen:
>>>
>>>> Hi,
>>>>
>>>> is it possible in rock to convert/export a log file with frames to a
>>>> movie file format like MPEG or avi? If looked around in rock and today
>>>> and the only way I found is via the png/jpeg export of rock-export...
>>>> I have tried that command with my log file but no pictures was
>>>> created...
>>>>
>>>> My idea was to export a camera log of avalon for the open campus day.
>>>> I finally used some non rock log files for this, but I can't belive
>>>> that there is no easy way for rock log files....
>>>>
>>>> Regards
>>>> Fabian
>>>>
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-- 
  Dipl.-Inf. Matthias Goldhoorn
  Space and Underwater Robotic

  Universität Bremen
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