This is not compatible with threading, however, and so -pre-scenecut is automatically activated when multiple encoding threads are used.ī-frames are a core element of H.264 and are more efficient in H.264 than any previous standard. Normal scenecut detection decides whether a frame is a scenecut after the frame is encoded, and if so then re-encodes the frame as an I-frame. Slightly faster (but less precise) scenecut detection. 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. This guide maps most of x264's options to FFmpeg's options along with detailed descriptions by x264 developer Dark_Shikari. Please see `avconv -h | less` or `ffmpeg -h | less` and scroll down to ' libx264 AVOptions:'. For encoder such as libx264, I attach the following right before the 'output.mp4' without any issue: -vf eq=gamma=0.8:saturation=0.9:contrast=1.Please Note: This guide will remain here for historic purposes but FFmpeg and libav now use libx264's internal -preset, -profile and -tune options. I am not trying to do anything fancy, just to tone down the gamma a bit, reduce saturation a bit, and increase contrast by a bit. However, when I use h264_vaapi or hevc_vaapi, I can NOT attach (video) equalizer on top of it. The command I use is the following: ffmpeg -hwaccel vaapi -hwaccel_output_format vaapi -vaapi_device /dev/dri/renderD128 -pattern_type glob -i '/picture/20220116/*.jpg' -c:v hevc_vaapi output.mp4

I have figure out how to use vaapi and Intel's hardware acceleration to create such video clip. I am trying to create a time-lapse video from a set of photos taken by a cheap webcam on my intel/linux machine.

Ffmpeg filters linux