mpeg2 and transparency
Posted: Mon Mar 20, 2017 2:47 pm
Having tried very hard to solve the following problem myself I am hoping that someone will point out where I am going wrong. I am using Adobe Premiere CS5.5.
I wish to create a graphic, (of simulated smoke), by defining the shape of the smoke envelope, copying it and then painting, (in Photoshop), two different pictures of the smoke.
These two versions of the smoke envelope are then played alternately in 5 frame clips on the time line for the time required.
If I now place a colour matte on a time line below the alternating smoke clips to check that the smoke behaves as I wish it to behave; and it does.
I then remove the colour matte because I wish to ‘export the media’, with the smoke on a transparent background, and import it into another project.
I export as an mpeg2 file but when I import it into the other project the transparency is lost and the smoke plays on a black background which, of course, defeats the object of the exercise.
There are other ‘workarounds’, which I have adopted, but I would like to understand why the more elegant approach did not succeed.
Arthur Best
DVMC
I wish to create a graphic, (of simulated smoke), by defining the shape of the smoke envelope, copying it and then painting, (in Photoshop), two different pictures of the smoke.
These two versions of the smoke envelope are then played alternately in 5 frame clips on the time line for the time required.
If I now place a colour matte on a time line below the alternating smoke clips to check that the smoke behaves as I wish it to behave; and it does.
I then remove the colour matte because I wish to ‘export the media’, with the smoke on a transparent background, and import it into another project.
I export as an mpeg2 file but when I import it into the other project the transparency is lost and the smoke plays on a black background which, of course, defeats the object of the exercise.
There are other ‘workarounds’, which I have adopted, but I would like to understand why the more elegant approach did not succeed.
Arthur Best
DVMC