Facebook Video Size Limits for Upload

Use the site’s required video aspect ratio range of 9:16 to 16:9, or the video will be immediately rejected for upload. Your video should use a maximum frame rate of 30 frames per second — videos above this frame rate are decimated by whole integers until the video falls within this range. For example, a 100 fps video is decimated by a factor of four to 25 fps, which is both below the 30 fps maximum and well below the video’s original quality. Audio is resampled in either 22,050hz or 44,100hz, selecting whichever rate is closer to the original video’s sample rate. Additional audio and video streams are omitted in favor of the first streams found in the video’s container file.