I have a problem with rendering rotoscoped videos. I have a simple video with a walking girl and I masked her out using rotobrush. Everything looks perfect, even RAM preiview is fine but when it comes to rendering it always looks odd. I tried different formats and settings, but nothing helps. The final rendered video always shows big mistakes and uncovered areas but there´s nothing like that in the composition. Does someone know how to solve this problem ? It would help me a lot. Thanks.