How to use ffmpeg to create loop apk

Here's a detailed guide on using FFmpeg to create looping APNG files, including step-by-step instructions and relevant commands.

Step 1: Prepare the Video File

First, you need a video file, such as input.mp4, which you intend to convert into a looping APNG.

Step 2: Use FFmpeg to Convert the Video

You can use the following FFmpeg command to convert the video into a looping APNG:

bash
ffmpeg -i input.mp4 -plays 0 -vf "fps=10,scale=320:-1" output.apng

Here's the parameter explanation:

• -i input.mp4: Specifies the input file.
• -plays 0: Sets the APNG loop count to infinite. Replace 0 with a specific number for a defined loop count.
• -vf "fps=10,scale=320:-1": This is the video filter option. fps=10 sets the frame rate to 10 frames per second, and scale=320:-1 adjusts the image width to 320 pixels with the height scaled proportionally.

Example

Suppose you have a video file named example.mp4 and you want to generate a looping APNG animation with a width of 320 pixels. Apply the above command to convert it, resulting in a file named output.apng.

Conclusion

Creating looping APNG with FFmpeg is an efficient method applicable in various scenarios, such as website animations or digital media advertisements. By appropriately adjusting the parameters, you can achieve optimal output tailored to different requirements and conditions.