Image, audio and video requirements
Please follow these guidelines to create image, audio and video files and ensure they are correctly uploaded and function well.
Image requirements
Compatible image formats:
- .jpg
- .png
- .gif
One of the most frequent questions about images for websites has to do with when to use GIF or PNG image formats, and when to use JPEG. Here is a simple answer: JPEG is used for photos and other images with millions of colors while PNG is used for all others except for animated images,then GIF format is used.
| FORMAT | BEST USE |
| 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
Compatible image formats:
- .mp4
Codec: H.264
A codec is the format in which videos are coded. isEazy accepts the majority of the most important video codecs, but to obtain the best results we recommend using H.264. If you upload High Definition (HD), choose the High Profile configuration H.264 instead of Main Profile.
Frame rate
When preparing the video for uploading, it is better to maintain the native frame rate speed when sharing the video. If there is an option for key frame rates, choose the same value you used for the frame rate speed.
Note: Always choose a “constant” frame rate frequency instead of a “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 edition software allows you the option, choose a “variable” bit rate and then select a value for the ranges. You can experiment with different “rates” if your file is too large or you are not satisfied with the original file quality.
| 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
Compatible audio formats:
- .mp3
- .aac
If your video format is different, you can convert it into one of the compatible formats using free on-line tools like media.io, Online Audio Converter, etc.
Codec: AAC-LC (Advanced Audio Codec)
To obtain the best results, we recommend using AAC-LC (low complexity) for the audio codec.
Data rate: 320 kbit/s
To obtain the best results, codify your audio at a constant speed of 320 kbit/s.
Sample rate: 48 kHz
To obtain the best results, adjust the audio sampling frequency to 48 kHz. If its configuration is already less or equal to 48 kHz, do not modify it.
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