[mythtv-users] [OT] ProjectX user guide
Michael T. Dean
mtdean at thirdcontact.com
Tue Nov 22 14:29:20 EST 2005
Steve Adeff wrote:
>project X is PERFECT for what your looking for. It is *meticulous* in keeping
>video and audio output time synced.
>
Audio and video stay (mostly) in sync at the expense of clicks and pops
in the audio (when audio was either deleted or inserted to maintain the
sync). The new mpeg2cut being integrated into SVN's mythtranscode, on
the other hand, inserts video frames to keep the sync (but Geoffrey is
still working on a plan for the missing audio corrections). Since video
never pops, this should be much less distracting.
Note, also, that I say mostly in sync because I have found that I get
sections of recordings lasting between 5 and 30 seconds where A/V sync
is off by as much as about 0.5 seconds. Depending on (you and) your
recording, you may not even notice this (if no mouths are shown or no
dialog is in progress, it's not noticeable, and since it happens at
"random" places throughout the stream, it's a matter of luck--which is
bound to run out after you edit enough recordings).
Also, A/V sync can be off by quite a bit before people are likely to
notice it; however, once a person has noticed a sync offset within a
video, that person is much more likely to notice other instances of sync
offset. Basically, the threshold at which a person notices the offset
is initially high, but once he/she has identified an offset, the
threshold plummets--allowing the viewer to easily identify offsets far
below the initial threshold.
Mike
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