Video resolution: During transcoding, the resolution of the video may change, resulting in blurred images. When transcoding, the resolution of the original video should be kept as much as possible to avoid blurring caused by resolution change.
2. Compression algorithm: Different compression algorithms will have different effects on video quality, which may lead to image blurring. Choose better compression algorithms, such as H.264 and H.265, to reduce the loss of video quality.