Hi. My animation video has black bars area (left and right side). When I upload the video as a background video on my website I see black area. I think I did something wrong on after effect render step I don't know. I use first time. What can I do ? I don't want to see black bars on my background video.Like this.(I used jpeg image and onto alpha channel video animation. Image size 1900x1188,video format mp4) Thanks.
If you are going to have video fill the frame of a media player you need to use standard video frame sizes. 1900x1188 is not a standard size. You need to fill your frame with 1920 X 1080 or any or the other standard square pixel video format sizes or the media player will add black bars. Also, MP4 compression has a standard set of frame sizes that it will work with. All others are either distorted or cropped to fit. That's just how video works.
Thanks Rick. You right.
Thank you Rick I did and it works well