> Unfortunately, Cinelerra doesn't allow for CLI driven rendering other
> than the rather inflexible batch render functions, and I though I found
> that rendering an edited project first to DV, then rendering the DV file
> to MPEG, gives a noticeable quality degradation.

The very noticeable degradation comes about due to a bug in libdv which is
used to do the encoding to DV from cinelerra.  When I last looked into this
about 2 years ago ffmpeg's DV codec wasn't as badly affected but it still
wasn't great.  AFAIK libdv is in deep maintenance mode now and I haven't
seen any evidence that there's any work going on to find and fix the DV
encoding bug.  As for ffmpeg I haven't tested the DV encoding functionality
of recent versions so I don't know what its status is.

Regards
  jonathan

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