– Baseline Profile, such as that used by iPods, does not support B-frames. This parameter simply serves to limit the max number of B-frames. Most, however, do not as a result, there is rarely any negative effect to setting this to the maximum (16) since x264 will, if B-adapt is used, automatically choose the best number of B-frames anyways.

Some specific targets, such as HD-DVD and Blu-Ray, have limitations on the number of consecutive B-frames. Recommended default: 40ī-frames are a core element of H.264 and are more efficient in H.264 than any previous standard. Recommended default: 25Īdjusts the sensitivity of x264's scenecut detection. Minimum GOP length, the minimum distance between I-frames. Very high GOP lengths will result in slightly more efficient compression, but will make seeking in the video somewhat more difficult. This determines the maximum distance between I-frames. Keyframe interval, also known as GOP length. FFmpeg developer superdump has implemented x264 presets to FFmpeg. This guide maps most of x264's options to FFmpeg's options along with detailed descriptions by libx264 developer Dark_Shikari.

Ffmpeg h264 quality