Hi,
Am Montag, 5. Januar 2009 schrieb Cengiz Gunay:
> On Mon, 5 Jan 2009, Francesco Fumanti wrote:
> > There is another feature that I would welcome:
> >
> > It would be handy if it was possible to play the stream in different
> > fast forward speeds (at least 16x and 32x) when searching for ads. This
> > way the user would simply have to watch and press the stop button when
> > an ad appears. He would not have to use the proportional slider, whose
> > precision depends on the length of the movie being cut and the size of
> > the window.
Guess mplayer isn't fast enough for this. Just try replaying some videos with
its -speed switch... on my CPU it's hardly possible to reach 8x speed!
Better use the skip-shortcuts ...
>
> Adding to this, I'd suggest having shortcut keys for skipping 30s, 1min,
> 5min to nearest I-frames, like in MPlayer and ProjectX. This helps in
> finding commercials much simpler than using the slidebar. I do like the
> slidebar and the exponential slidebar for fine-tuning, but it gets tiring
> for doing the bulk of the job.
... which are actually already there!
Ever tried using the srcollwheel of your mouse while holding Alt-, Ctrl- or
Shift-keys? Default wheel increments (in frames) are:
wheel_incr_alt=22500
wheel_incr_ctrl=1
wheel_incr_normal=1500
wheel_incr_shift=25
but you can adapt this in the settings file (~/.qt/dvbcut.sf.netrc) to your
needs.
BTW, with wheel_delta=-120 you can change the scroll direction... ;-)
>
> Now, to really make it simple for finding commercials, it would be GREAT
> if dvbcut could identify the black frames during indexing or a separate
> scan. Then, the user can jump through them and fine-tune cut points. I am
> a little confused about the "difference from frame" function and
... guess thats already answered...
> auto-chapters function. Maybe these can already do what I suggest, but I
> don't know how to use them properly.
>
"Auto-Chapters" sets a chapter mark every fixed number of frames or a fixed
number of chapters if chapters/interval is negative, which you can also
configure in the settings files.
I also had in mind implementing a black frame detection for "Auto cut points",
but that was far too slow with the used imageprovider. Maybe it could be
implemented more effectively on the mpeg level during indexing somehow...
don't know... however, not every commercial begins with a black frame and not
every black frame starts a commercial.
BTW, If you want tho see how slow frame processing is or have a fast enough
CPU you could set chapters/tolerance>0. That way inbetween the given numer of
frames around the normaly fixed chaptermarks from above the nearest scene
change (=sum of color distances > chapters/threshold) is detected to find a
more appropriate chapter mark.
A black frame detection would work similar slow ...
ciao
Ralph
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