Here is another post on the cross-compile series for DroboFS.
Introduction: Why ffmpeg?
It’s needed for my insane desire to have my DroboFS appear as another TiVo, from my TiVo
Overall compiling complexity: Easy.
Step 1: Background info
To be able to make use of this post, you need a VM configured as indicated in this post.
Step 2: Enter the cross-compiling environment
See step 2 of this post to see instructions on how to enter the chroot environment.
Step 3: Get the source code
ffmpeg’s website: http://www.ffmpeg.org/
Direct link: http://www.ffmpeg.org/releases/ffmpeg-0.6.1.tar.gz
Make sure that you are in the folder /root/code, then type:
tar zxf ffmpeg-0.6.1.tar.gz
Step 4: Configuration
Configuration for ffmpeg is a bit different than other libraries:
./configure --enable-cross-compile --target-os=linux --arch=armv5te --cross-prefix=arm-none-linux-gnueabi- --prefix=/usr/arm
This should return no errors.
Step 5: Compiling
Within the folder /root/code/ ffmpeg-0.6.1:
Again, there should be no errors. If any errors are reported, make sure you performed steps 3 and 4 correctly. If you still have errors, make sure that the VM is properly configured (e.g. like I did the first time around, when I got the wrong toolchain, or forgot to ‘export’ the proper compiler flags).
Step 6: Installing
Installing is simple:
which will place the compiled library under /usr/arm.
Then we package the whole /usr/arm and copy it over to the DroboFS, as indicated on step 9 here.
Now you can cross-compile any application that uses ffmpeg, since the required headers are libraries are present in /usr/arm both in the VM and on the Drobo.