[mythtv-users] nuvexport and ffmpeg-CVS

John Andersen jsamyth at gmail.com
Sun Dec 18 01:47:23 EST 2005

On 12/17/05, Matt <skd5aner at gmail.com> wrote:

> > The output file size is slightly different (350095580 vs 349024640)
> > and the transcode version is indeed a little better, but not 5 times
> > better.
> >
> > Thats right it took transcode 3 hours and 45 minutes to
> > transcode a 1 hour show, and it took ffmpeg 48 minutes.
> >
> > Further, the transcoded version has occasional jerkyness in
> > the video, (I think there is some playback frame dropping
> > happening) on some players, and the video falls behind
> > the audio in other players.
> >
> > This does not happen with ffmpeg.


Further tests seems to suggest that using --transcode
with a single pass and no noise reduction gives virtually
identical picture quality as transcode with multi-pass and
noise reduction.

The run time on that is 1h 28 minutes (still twice ffmpeg's time)
and it plays perfectly in xine, mplayer, kaffeine, vlc. and
Windows Media Player 9 and later.  It shows
slight jerkyness in Winamp and Windows DivX Player
(older version).

So this may be my new standard, its cleaner than
ffmpeg.   Down side:  files are 21% bigger at
424221176 bytes.

Now if I can just get the command line to work so
I can run these nuvexport jobs from the backend I'll be happy.


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