[FFmpeg-devel] [PATCH] vorbis_enc.c: avoid div zero that causes noise

[Frank Barchard]

Improves quality for ff vorbis encoding of silence.

Some audio files had clicking, typically at the beginning or end.  It was
tracked down to a divide by zero.
Two samples that improve in quality with the patch are:
pitivi - http://jeff.ecchi.ca/public/test-html5.html
red -
http://movies.apple.com/movies/us/hd_gallery/gl1800/1080p/artbeats_red_m1080p.mov
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