No transcoding: we recommend keeping static MMS images files under 740Kb.Sinch transcoding: we recommend keeping static MMS images files under 1Mb.
The optimal image size across all devices has an aspect ratio of 9:16. We recommend 640px by 1138px or 1080px by 1920px.
When an MMS image is delivered to a phone there are typically two ways the content is displayed.
It is therefore important that any image be designed with the “content of interest” within a more restricted areas of the image so that it is readable from within the conversation view.
For images 640px by 1138px: avoid adding content of interest on the top 129px and the bottom 89px. For images 1080px by 1920px: avoid adding content of interest on the top 219px and the bottom 150px.
An animated gif is a .gif image file composed of multiple images that play on a loop. Unlike videos, animated gifs files do not include sound and do not require the viewer to press play.
No transcoding: we recommend keeping animated MMS images files under 740Kb. Sinch trancoding: we recommend keeping animated MMS images files under 1Mb.
When transcoding an animated gif, we will reduce the dimensions of the animated gif by 25% and 50%. We will also apply compression to the animated gif.
The results of this compression will vary based on the number of colors and compression you have already applied to your source animated gif.
Animated GIFs are displayed too large on iOS v13 – 13.4 unless the width is 320px or less. This issue is fixed in 13.5
No transcoding: we recommend keeping MMS video files under 740Kb. Sinch trancoding: we recommend keeping MMS video files under 10MB. This will result in Video files from 300Kb to 1.5Mb.
Landscape format (Horizontal):1280px by 720px
Portrait format (Vertical):640px by 1138px
Frame rate: 30 FPS.
You can improve the quality of your video by using the following techniques: