[Ssc-dev] Redaction filter for ffmpeg.

[Hans-Christoph Steiner]

I set up a separate android-ffmpeg project since it seems there were so
many different ways of doing it, it was confusing.  So here is my clean,
easily changeable, static ffmpeg creator for Android.  The result is a
single 'ffmpeg' that is statically linked, so its the only file you
need.

https://github.com/guardianproject/android-ffmpeg

Build instructions are in the README.  I did this on Ubuntu, hopefully
it work on Mac OS X.

.hc

-- 
  Hans-Christoph Steiner
  mobile: +1 347 850 4872  work: +1 718 360 4872


On Thursday, September 01, 2011 8:48 PM, "Andrew Senior"
<andrew.senior at gmail.com> wrote:
> Hi Shawn,
> I wrote a video filter (attached file) for ffmpeg that reads a text file
> with redaction regions and timing and applies the redaction to the video.
> I've only tried this on my windows laptop, not inside the android client
> yet.
> 
> /* Use:
>  * put this file in the libavfilter directory
>  * add the line
>        REGISTER_FILTER (REDACT,      redact,      vf);
>  * to avfilter_register_all in libavfilter/allfilters.c,
>  * add
>        OBJS-$(CONFIG_REDACT_FILTER)                 += vf_redact.o
>  * to libavfilter/Makefile, and
>        CONFIG_REDACT_FILTER=yes
>  * to config.mak
>  */
> More "how-to" in the file
> 
> Sample command line- the parameter to the filter is just the filename of
> a
> text file for now:
>  ./ffmpeg.exe -i 'myvideo.mp4' -vf 'redact=redact_unsort.txt' -acodec
>  copy
> output.mp4
> 
> Here are a couple of sample config files:
> 
> # This is a set of coloured bars moving from left to right
> # Each bar lasts for a second, overlapping for 0.5s with left and
> # right neighbours.
> # re-ordered to test the sorting of vf_redact
> 3,4,300,350,0,1000,white
> 0.5,1.5,50,100,0,1000,green
> 1.5,2.5,150,200,0,1000,blue
> 2,3,200,250,0,1000,cyan
> 3.5,4.5,350,400,0,1000,red
> 1,2,100,150,0,1000,yellow
> 4.5,5.5,450,500,0,1000,yellow
> # another comment for testing
> 4,5,400,450,0,1000,green
> 2.5,3.5,250,300,0,1000,magenta
> # another comment for testing
> 0,1,0,50,0,1000,red
> 
> 
> 
> 0,3,50,400,50,100,pixel
> 2,4,150,200,100,150,pixel
> 3,6,150,500,200,310,pixel
> 1,5,100,400,150,200,red
> 5,9,0,70,0,80,green
> 
> _______________________________________________
> Ssc-dev mailing list
> 
> Post: Ssc-dev at lists.mayfirst.org
> List info: https://lists.mayfirst.org/mailman/listinfo/ssc-dev
> 
> To Unsubscribe
>         Send email to:  Ssc-dev-unsubscribe at lists.mayfirst.org
>         Or visit:
>         https://lists.mayfirst.org/mailman/options/ssc-dev/hans%40at.or.at
> 
> You are subscribed as: hans at at.or.at
> 
> Email had 1 attachment:
> + vf_redact.c
>   14k (text/x-csrc)