Before running the demo script, make sure you '. setenv' from the parent
directory. Also, please create clips clip1.dv, clip2.dv, clip3.dv, clip1.mpeg,
-clip2.mpeg, clip3.mpeg, and music1.ogg. It is okay if some of these are
-duplicates. Please make sure clips are at least 500 frames duration.
+clip2.mpeg, clip3.mpeg, and music1.ogg. Please make sure clips are at least 500
+frames duration.
These notes explain the the concepts presented in each demonstration and
what details to look for.
representation of the service network. That can be played directly due to the
westley producer plugin. See docs/westley.txt for more information. The
"MainConcept DV" consumer refers to the proprietary MLT plugin required to
-use MLT with MainConcept DV, DVCPro, and MPEG codecs. "/dev/dv1394" refers
+use MLT with MainConcept DV, DVCPro, and MPEG codecs. "/dev/dv1394/0" refers
to a device file for transmitting DV over FireWire using the Linux dv1394 kernel
module. The "BlueFish444" consumer is another proprietary plugin to use
the BlueFish444 manufactured SDI video/audio output cards with MLT.
This image can be a 16 bit PGM (grayscale bitmap) or the luma channel of
any video producer. A number of high quality wipes can be downloaded from
http://mlt.sf.net/. It also performs field rendering.
+ The second wipe demonstrates the ability to control the direction of the
+ wipe as well.
Obscure
A music bed sound track can be mixed with a video. The sound track of the
video clip has a "floating" amplitude normalisation filter applied.
- Typically, audio nornmalisation applies a constant gain factor across the
+ Typically, audio normalisation applies a constant gain factor across the
entire duration of an audio segment from a single source where the
gain factor is automatically determined by anaylsing the maximum "power"
or peak levels. However, in news production, a popular requirement is to
A variation on the above Bouncy, Bouncy demo that applies a shape, or
alpha producer, to the the compositing region.
+
+Breaking News
+
+ This demonstrates layout capabilities of the compositor.
+
+Squeeze Transitions
+
+ This demonstrates a distorting barndoor-like wipe.
+
+
+J Cut
+
+ A J cut is an edit where the audio cuts before the video.
+ It gets its name from the way it looks on a NLE timeline user interface.
+ When the audio cuts over, it does an audio crossfade over the duration of
+ one frame. This makes the audio cut slightly less abrupt and avoids any
+ "click" due to mismatched sample levels at the edit point. The video edit
+ is a hard cut.
+
+L Cut
+
+ An L cut is an edit where the video cuts before the audio.
+ It gets its name from the way it looks on a NLE timeline user interface.
+ This demo shows a very quick dissolve over 5 frames for a soft video cut.
+ Like the J Cut demo, an audio crossfade for the duration of one frame makes
+ an audio edit nearly instantaneous while being slightly softened and
+ avoiding aberrations.
+
+Fade from/to black/silence
+
+ Of course, it is possible using MLT to fade from black on video and silence
+ on audio as well fade to black and silence.
+
+Push wipe
+
+ A push wipe is a somewhat fancier transition than most standard wipes
+ because it involves motion. The new video clip "pushes" the old video
+ clip off one edge. If you can preview on an analog monitor you will notice
+ how smooth the motion is due to field-based rendering.
+
+Ticker tape
+
+ A very minimal reverse crawling title neard the bottom of the screen.
+ The goal of the demo is show fluid motion of the field-based rendering of
+ the compositor when viewed on an analog monitor using a DV or BlueFish444
+ consumer. The demo also shows the potientional for using and extending the
+ existing set of services for a full blown news ticker implementation.
projects / melted / blobdiff