Custom FFmpeg Export Options

'Peter 12Aug15: ToDo-1 As far as I can see this has never been documented.

I'm pretty stuck as how to proceed further with this - it's way beyond my envelope of knowledge and experience ...

• Peter 12Aug15: there are a number of open Bugzilla entries associated with this that indicate that all may not be entirely well with this functionality:
  • from back in 2010 Bug 59 P3 Custom FFmpeg Export includes many invalid combinations. This looks pretty serious if it's still true
  • and also from 2010 Bug 135 P3 Custom FFmpeg Export dialogue does not respond to ENTER after clicking in the Formats or Codec selector in Linux
  • Bug 896 P3 Custom FFmpeg Export: Imported presets do not load
  • and one I added today Bug 1140 P4 - trivial, cosmetic, but very easily fixable

The Custom FFmpeg format options dialog appears in response to the Open custom FFmpeg format options button in the Export Audio or Export Multiple dialog Options pane when you have chosen Custom FFmpeg Export in the Save as type dropdown.

Note that it is necessary to supply the full file name and the extension as Audacity does not automatically add the extension when custom FFmpeg is used.

FLAC Options

Known issues from the 2.1.1 Release Notes: Custom FFmpeg Export: many combinations of formats and codecs are incompatible, as are some combinations of general options and codecs. Some files may be exported as zero kb files In the "Custom FFmpeg Export" dialog, imported presets do not load. (Linux) Custom FFmpeg Export dialog does not respond to ENTER after clicking in the Formats or Codec selector.