Image, audio and video requirements

In order for the multimedia resources you use in your projects to work properly, we recommend that you follow these guidelines:


You can include an image of up to 2Mb. The image formats supported by our courses are .jpg, .png and .gif.

JPEG is recommended for photos and images with many colours. PNG works best for infographics and images with solid colours and handles transparency better. Finally, GIF is ideal for elements with few colours, simple drawings, animations and basically any image that does not have gradients or blends.

GIF(Extension .gif) For elements with few colors, simple drawings, animations and basically any image without gradients or mixtures. The GIF format allows showing images with clear backgrounds.  
PNG(Extension .png) PNG generally produces images with a better aspect with smaller file sizes than GIF for the same types of images with limited color. PNG images handle transparencies better.
JPEG(Extension .jpg or .jpeg) JPEG is the best format for complex and colorful images (like photographs), images containing gradients or mixtures of colors and any other image with millions of colors.

Video requirements

You can add a video file of up to 1Gb. For videos only the .mp4 format is supported, but there are other aspects to take into account:

  • H.264 codec: the codec is the format in which videos are encoded. isEazy supports most major video codecs, but for best results we recommend using H.264. If you are uploading High Definition (HD) video, choose the High Profile H.264 setting instead of Main Profile.
  • Frame rate: When preparing a video for uploading to a course, it is best to maintain its native frame rate when compressing it. If there is an option for keyframes, choose the same value you used for the frame rate speed. Note: Always choose "constant" frame rate frecuency instead of "variable" frame rate speed.
  • Bit rate: The bit speed, also known as data rate, controls the visual quality of the video and its file size. If your video editing software allows you the option, choose a "variable" bit rate and select a value from the ranges shown below. You can experiment with different "rates" if your file is too large or you are not satisfied with the quality of your original file.
Quality Bit rate (kbit/s)
SD 2,000 – 5,000
720p 5,000 – 10,000
1080p 10,000 – 20,000
2K 20,000 – 30,000
4K 30,000 – 60,000

These are some of the most common formats regarding video resolution:

Format Resolution (px)
Standard Definition (SD)4:3 aspect ratio 640 × 480
Standard Definition (SD)16:9 aspect ratio 640 × 360
720p HD16:9 aspect ratio 1280 × 720
1080p HD16:9 aspect ratio 1920 × 1080
2K16:9 aspect ratio 2560 × 1440
4K16:9 aspect ratio 3840 × 2160

Audio requirements

You can include audio up to 30Mb. Audio formats supported by isEazy are .mp3 and .aac. If you have audio in a different format, you can convert it using free online tools such as or Online Audio Converter, among others.

With audio files there are also certain aspects to consider:

  • Codec AAC-LC (Advanced Audio Codec).
  • Data Rate: for best results, we recommend encode the audio at a constant rate of 320 kbit/second.
  • Sample Rate: in this sense, in order to obtain quality audio, it is best to set the audio sampling frequency to 48 kHz and if your configuration is already less than or equal to 48 kHz, do not modify it.

Continue reading  Requirements

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