For the general edition of the videos use Blender VSE, it is unfamiliar, but blender has one of the best video editors with free software.
As we already have organized the video files we can now order them in a timeline and add the sounds and voices to them.
Video Editor in Blender
When you work with videos you have to have sorted the files and always work in the same folder.
A good method is to add the takeovers of Storyboard or Layouts as a reference of the shots that we do not yet have, this is called animatic and to be replaced by videos when it is advanced in animation.
Add an image
Once we have the cursor there we press Shift A and click Image in the pop-up menu that appears.
In the file selector shown by Blender we search the folder where we unzip the animation shots. We go to the folder where our first shot is and choose it, if we need all the files we press the A. Finally we click on “Add image clip”. This is repeated for each shot.
Modify the duration
Press the right button on one side of the image and then press G this allows us to vary the duration.
Transactions
We place the timeline on the position and select the right-click to modify the clip, we go to the Edit Clip control and modify the opacity.
If we want to make it modify in opacity in several positions we have to press the letter I in each position, we will notice that opacity changes from color to yellow.
If we need a thinner control we can use the Curve Editor
If we want to smooth the transition in the images we can use a chained melt.
Volume management
We place the timeline on the position and select the right button to modify the clip, we go to volume control and modify the volume.
If we want to make it modify in the volume in several positions we have to press the letter I in each position, we will notice that the volume changes from color to yellow.
If we need a thinner control we can use the Curve Editor
Properties render
For 4232 I am using 1920 wide by 1080 high to 25 fps which is the PAL configuration in HD.
Export in OGG Theora format Matroska compression Theora.
Render
To perform a render press Ctrl F12