While many phones (e.g. Sony Xperia) could only capture still images **during** video recording with the same resolution as the video resolution itself (e.g.: 2.1 megapixels for 1080p), Samsung flagships since 2012 (Galaxy S3) could capture photos of the entire available image sensor resolution with the same aspect ratio of the video (rear camera only). I.e. during 16:9 aspect ratio videos, this means that the picture captured during video recording had the same resolution as the highest possible 16:9 photo resolution. Since the 2016 flagships (S7 and S7 edge), still images for video recordings also works for 1440p and 2160p (but not 1080p@60fps). Before then, up to 1080p@30fps. Since 2013 (Galaxy S4), this works in combination with the digital video stabilization. Because the Galaxy S5, Note 4, S6 (and S6 Edge) and Note 5 (and S6 edge+) had wide 16:9 image sensors, this meant that they could capture full 16 megapixel still images (5322×2988 pixels) during 1080p video recording. The S4 and Note 3 could capture 9,6 megapixel still images (4128×2322) during 16:9 video recording (i.e. 1080p, 720p). But during 4:3 video recording (e.g. 640×480), they capture full 13 Megapixel (4128×3096) still images. This suggests that they could technically have done that too during 1080p 16:9 video recording, but Samsung did probably forego that so the field of view of the video matches the still image. But if I designed it, I would allow full image sensor still images regardless of the aspect ratio of the currently recording video.