[FFmpeg-user] Piping video from REDline to ffmpeg

[David Favor]

Elliott Balsley wrote:
> I frequently work with footage from RED Digital Cinema cameras, and it would be great to use ffmpeg sometimes.  However, ffmpeg doesn't support the r3d codec.  RED provides a free conversion tool called REDline, but I can't figure out how to pipe its output to ffmpeg.  I'd really appreciate any help on this.
> REDline is available for Mac and Windows as part of the free RedCine-X Pro app at https://www.red.com/downloads but I also put just the mac binary on Google Drive for easy downloading:
> https://drive.google.com/file/d/0B52QuT8oHvtZZE5TMmdfSVZybFU/edit?usp=sharing
> 
> Here's some sample r3d footage: http://www.r3dfootage.com/footage
> 
> If piping can be made to work, it might be the ideal solution for r3d files, so that REDline can take care of the debayer and raw conversion, then ffmpeg takes care of everything else.

The hard way is using fifo (pipe) files.

The easy way is to use a recent version off ffmpeg + the pipe:# operator:

     http://www.ffmpeg.org/ffmpeg-protocols.html#pipe

To determine if your version off ffmpeg supports the pipe operator:

     ffmpeg -protocols | grep pipe

If you get output pipe is supported by your ffmpeg. If not, you may choose
to rebuild ffmpeg making sure all default protocols are built:

     http://www.ffmpeg.org/ffmpeg-protocols.html#Protocols

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