What parameters should be set in ffmpeg to improve image quality?

To improve the clarity of the video, you can use the following parameter settings:

1. Increase the bitrate of the video by using the -b:v parameter to set the desired bitrate. A higher bitrate will result in a larger video file size, but it will also improve the video quality. For example, you can use -b:v 2000k to set the target bitrate of the video to 2000kbps.
2. Increase the video resolution by using the -s parameter to set the target resolution of the video. A higher resolution provides more pixels, thus improving the clarity of the video. For example, you can use -s 1920×1080 to set the target resolution of the video to 1920×1080.
3. Utilize higher video encoding quality: Adjust the -crf parameter to set the encoding quality of the video. A lower -crf value will result in higher video quality, but will also increase the file size. For instance, you can set the video encoding quality to 18 using -crf 18.
4. Utilize higher video encoder presets: By using the -preset parameter, you can adjust the preset of the video encoder. A higher preset can improve both the compression efficiency and quality of the video. For example, you can set the preset of the video encoder to medium by using -preset medium.

By integrating the above parameters, adjustments can be made according to specific needs to enhance the clarity of the video.