It does. MOVはQuickTimeで、Apple-ネイティブで、MP4が持ち運べないProResとアルファチャネルビデオの通常のホームです. That governs how the tracks are stored and therefore how cleanly one can be dropped.
透明度の決定は，透明度の変更を行う段階である。 That is the step most people actually came for, and doing it after MOV をミュート rather than before it means the conversion works from the file you finally settled on.
