FAQ, Known Problems and Workarounds

There are a few known problems that have not yet been fixed for which there are some workarounds presented here.

Workaround for the alpha channel not working as intended when using an EDL inserted as a reference or when an EDL is nested.

Using the Projector on the EDL within a Master Project follow these next steps. This solves the alpha channel not working as expected and the Master Project now looks correct.

Workaround for using a transition, like Dissolve, between 2 edits with the plugin Motion51.

In this case, the Motion51 plugin and the Dissolve transition are not seen during the transition phase and is stopped at the cut point between 2 edits. The left edit's plugin should be in effect until the end of that clip and should include the dissolve. Instead, there is a jump inside the dissolve, as if the plugin does not exist. There are 2 possible workarounds. For example, extend the Motion51 plugin to cover both clips rather than having a separate plugin for each clip. Or another workaround is to use two tracks and have the plugin cover the cut point and use a Fade auto instead of the Dissolve transition.

The Fade auto in certain circumstances produces an unwanted black flash.

When you insert an effect on an empty track the fade fades as if it were on a black background; it interprets the alpha as black where there is transparency, which is what produces the fade. So the problem in the case of text is that the letters appear as a black flash briefly in the first few frames, then goes back to transparent, then the fade starts normally with the white color. To avoid the unwanted effect produced by the fade over black (because there is no content) leave the fade in/out of the effect at 0 and use the fade line to perform the intended results to avoid the problem with the alpha channel. The same problem occurs when using transparent PNG images with fade video transitions and can be resolved in the same manner. However this workaround can be quite tedious and complicated if you want to fade many snippets of text and transparent PNGs on the same track, with always the same video transition filter set to the same duration.

Just a side note here. Fade in/out in the Title plugin works fine if there is a clip/image above the plugin in the same track without an alpha channel but not if there is no clip/image. And the Transition effect works fine when there is a transition between two clips/images without an alpha channel.

The CINELERRA-GG Community, 2021
https://www.cinelerra-gg.org