[Rock-dev] Avi export for log files

[Fabian Franzen]

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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> 
> --
>  Steffen Planthaber
>  Weltraumrobotik
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