video sizer

Use this tool to help you create encoder-friendly and playback optimized video dimensions. mod16 sizes are best for encoding and playback. If your preferred size isn’t mod16, you can encode at mod16 and then set the playback dimensions to your preferred size in HTML, Flash, or whatever playback mechanism you use.

Source File Info
Preferred width:
Preferred height:
Aspect ratio:
Strict Aspect Ratio
mod16 dimensions:
mod8 dimensions:
mod4 dimensions:
mod2 dimensions:
Loose Aspect Ratio
mod16 dimensions:
mod8 dimensions:
mod4 dimensions:
mod2 dimensions:

optimal frame dimensions for online video

Video codecs such as AVC/H.264 (MP4), On2 VP8 (WebM), On2 VP6 and Sorenson Spark (FLV) perform best when the frame width and height use multiples of 16, or “mod16″. While you can use any width and height in your encoding settings, non-optimal dimensions can result in poor image quality and reduced frame rate. For the best image quality and playback, you should always use width and height dimensions that use a multiple of 16 (best), 8 (better), or 4 (good). Refer to the following tables to pick dimensions for your layout.

NOTE: Both the native encoding dimensions and the playback dimensions should be a multiple of 16 if possible. For example, if you encode your video file to use a frame dimension of 320×240, you should scale to a size such as 512×384.

Table 1 – 4:3 Aspect Ratio Sizes
Best (16) Better (8) Good (4)
640 x 480 608 x 456 624 x 468
576 x 432 544 x 408 592 x 444
512 x 384 480 x 360 560 x 420
448 x 336 416 x 312 528 x 396
384 x 288 352 x 264 496 x 372
320 x 240 288 x 216 464 x 348
256 x 192 224 x 168 432 x 324
192 x 144 160 x 120 400 x 300
128 x 96   368 x 276
    336 x 252
    304 x 228
    272 x 204
    240 x 180
    208 x 156
    176 x 132
    144 x 108
    112 x 84
Table 2 – 16:9 Aspect Ratio Sizes
Best (16) Better (8) Good (4)
1280 x 720 1920 x 1080 1216 x 684
1024 x 576 1152 x 648 1088 x 612
768 x 432 896 x 504 960 x 540
512 x 288 640 x 360 832 x 468
256 x 144 384 x 216 704 x 396
  128 x 72 576 x 324
    448 x 252
    320 x 180
    192 x 108





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