The length of the GOP stands for the number of frames between two I-frames. IBBBBP: I, BBBBB (four B frames in sequence) and P frames (highest latency highest bitrate efficiency) IBBBP: I, BBB (three B frames in sequence) and P frames IBBP: I, BB (two B frames in sequence) and P frames

IP: I and P frames only (high picture quality, efficient compression) I: I frames only (highest quality, least amount of bandwidth efficiency) For the Makito X4, you can choose from the following 6 options: Choosing the right combination and number of I, P, and B frames is key to optimizing video quality. I-frames contain the most amount of data while P-frames only contain the differences between it and the previous I-frame, and B frames contain both forward and backward changes resulting in even more efficient compression. The I-frame, intraframe, or also known as the key frame is the main reference for the subsequent P and B frames in a GOP. Tip #2 Pay Attention to GOP Size and FramingĪ GOP or Group of Pictures are several video frames grouped together for encoding in H.264 or HEVC. It’s worth noting that higher profiles generally result in higher bitrates and demand more resources to decode than lower ones. In the Makito X4 video encoder, for example, there is a range of profiles available for both HEVC/H.265 and AVC/H.264 with 8 or 10-bit pixel depths, 4:2:0 or 4:2:2 chroma subsampling options.

Some video encoders allow for the choice of different encoding profiles for different levels of picture quality. HEVC can also be used for when bandwidth is limited, a 3Mbps HD stream in HEVC will be comparable to a 5Mbps in H.264. A 5Mbps HD stream in HEVC will result in better picture quality than H.264. Although many broadcast workflows rely on the AVC/H.264 codec for video compression, HEVC offers nearly twice the bandwidth efficiency. Whenever possible, choose HEVC/H.265encoding.

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