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Updating FFmpeg libraries on MacOS
| Updating FFmpeg libraries on MacOS [message #84779] |
Sat, 08 June 2013 08:12 |
dg86
Messages: 118
Registered: September 2012
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Senior Member |
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I'm posting this in hope that it will be useful to others using
IDLffVideoWrite and IDLffVideoRead on MacOS.
The FFmpeg libraries that ship with IDL 8.2.* support a relatively
small set of formats and codecs. Fortunately, you can replace these
stock libraries with others on your system to extend IDL's video
reading and writing capabilities.
I use the ffmpeg libraries that are installed by MacPorts:
> sudo port install ffmpeg +nonfree
The nonfree variant provides support for additional formats and codecs.
Because of intellectual property issues (at least in the US) the resulting libraries
cannot be redistributed. Remove +nonfree to install unencumbered libraries.
Now we have to convince IDL to use these libraries rather than the stock
libraries. A standard IDL installation places the relevant libraries in
/Applications/exelis/idl/bin/bin.darwin.x86_64
A standard MacPorts installation places the relevant libraries in
/opt/local/lib
If you installed things in other places, you can identify the relevant directories with
> locate libavcodec.dylib
and then revise the paths in the following commands accordingly.
To back up the stock libraries and make the necessary links:
cd /Applications/exelis/idl/bin/bin.darwin.x86_64
sudo mv libavcodec.54.dylib libavcodec.54.bak
sudo mv libavformat.54.dylib libavformat.54.bak
sudo mv libavutil.52.dylib libavutil.52.bak
sudo mv libswscale.2.dylib libswscale.2.bak
sudo ln -s /opt/local/lib/libavcodec.54.dylib .
sudo ln -s /opt/local/lib/libavformat.54.dylib .
sudo ln -s /opt/local/lib/libavutil.52.dylib .
sudo ln -s /opt/local/lib/libswscale.2.dylib .
This did the trick for me.
TTFN,
David
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