I have a number of home-recorded video DVDs of Prom concerts, etc, and I
want to make notes of the elapsed times when various items of music start.
In the past I've done that using a DVD player/recorder, but that is tedious
for various reasons. So I thought I'd use VLC on a box running Xubuntu.
This plays the DVDs OK (although I have to rip as iso images to a file to
avoid some 'skipping' when playing from DVD). It also shows an elapsed time
and the duration of the 'track' (title) being played.
However the snag is that although the total time is correct, the elapsed
time is often wrong.
For example, on one disc a given item of music starts at a time which my
DVD recorders/players show as 28min 36secs. But VLC shows this same point
as being at 28mins 59secs. i.e. Adrift by 23 seconds. So if I use VLC to
note the time the music 'starts' I then find that is more than 20 sec into
the actual music when I play the DVD on a conventional DVD player/recorder!
I've done a duckduckgo search but not found any info on how to fix this.
Can someone point me at the solution?
FWIW I'm *not* talking about a lip-synch offset. The vision and sound are
in synch OK. The problem is that the 'elapsed time' displayed by VLC is
simply inaccurate by many seconds. Yet it starts off at 00:00 and if I play
near the end of the item it gets to the end with the elapsed time showing
Although I've not yet let it play the entire file to see if the drift then
accumulates, this doesn't seem to be a cumulative error as the value I get
above doesn't depend on if I drag the time-slider to some point or another.
So puzzling all around!
As a cross-check I also tried using Parole (which installed with Xubuntu).
This *does* show an elapsed time that matches the DVD players/recorders, so
give the 'correct' value. *But* Parole is a PITA because I can't find any
way to tell it to send the audio to ALSA. So using that I have to judge on
movement, not audio!
And, yes, I've wasted time trying to get pulse audio to let the output go
to 'alsa' with the 'card' being my external USB DAC. No joy. But if anyone
know how I can force Parole to send audio direct to alsa and bypass the
awful pulse audio, please let me know. Again, a search I did failed to give
me any leads on that.
Please use the address on the audiomisc page if you wish to email me.
Armstrong Audio http://www.audiomisc.co.uk/Armstron...trong.html
Audio Misc http://www.audiomisc.co.uk/index.html