Video resize

Goal:

Through this blog, we strive to share a detailed explanation of how to resize videos and images. For example, I am taking a video with a resolution of 3840 x 2160 and resizing it to 1560 x 864.

Input:

Sample video.

To check its properties like codec formats , bitrate , etc., run the below command

ffprobe <file_location>

For example
ffprobe input.mp4

Process:

To resize the video , run the below command

ffmpeg -y -i <input_file_path> -vf scale=1560:864 <output_file_path>

-y: Overwrites the output file if it already exists.

-i <input_file_path>: Specifies the input video file path.

-vf scale=1560:864: Applies the video filter scale to resize the video. The dimensions 1560:864 represent the desired width and height of the output video. You can modify these dimensions as per your requirements.

<output_file_path>: Specifies the output file name for the resized video.

For example

ffmpeg -y -i input.mp4 -vf scale=1560:864 resized_video.mp4

Result:

After running the command resized video will be generated.

To check the output file properties run ffprobe <output_file> command

Image resize

Goal:

The goal of our blog is to showcase the Image resize concept using ffmpeg. In this blog , I m taking a image with resolution 1920 x 1080 and Resize to 1560 x 864

Input:

Sample image.

To check its properties like codec formats , bitrate , etc., run the below command

ffprobe <file_location>

For example
ffprobe input_image.jpg

Process:

To resize the image , run the below command

ffmpeg -y -i <input_image_path> -vf scale=w=1560:h=864:sws_flags=lanczos -q:v 2 <resized_img_path>

-y: Overwrites the output file if it already exists.

-i <input_image_path>: Specifies the input image file path.

-vf scale=w=1560:h=864:sws_flags=lanczos: Applies the video filter scale to resize the image. The options w=1560 and h=864 represent the desired width and height of the output image, respectively. The sws_flags=lanczos option specifies the scaling algorithm to be Lanczos, which provides high-quality resizing. You can modify the width and height values as per your requirements.

-q:v 2: Sets the quality of the output JPEG image. The value ranges from 2 (highest quality) to 31 (lowest quality). You can adjust this value as needed.

<resized_img_path>: Specifies the output file name for the resized image.

For example

ffmpeg -y -i input_image.jpg -vf scale=w=1560:h=864:sws_flags=lanczos -q:v 2 resized_img.jpeg

Result:

After running the command resized image will be generated .

To check the output file properties run ffprobe <output_file> command

How to resize a video using FFmpeg?