So I started to google around to see how I could get better results.īut except for a few posts here and there, I'm mostly coming up blank. GitHub - Vargol/ffmpeg-apple-arm64-build: Build script for ffmpeg targeting the latest open source video codecs running on macOS using Apple's M1 processor. The only setting that seems to work is the video bit rate (-b:v). Build script for ffmpeg targeting the latest open source video codecs running on macOS using Apple's M1 processor. Then I noticed that changing the crf or the preset makes no difference, ffmpeg seems to ignore those settings. The conversion speeds increased from 0.75x to 4x, almost a 500% improvement !īut then I noticed large filesizes and slightly fuzzy results. I'm using this command: ffmpeg -i input_h264.mp4 -c:v hevc_videotoolbox -b:v 6000K -c:a copy -crf 19 -preset veryslow output_h265.mp4 My Mac hardware is the 10th generation Intel i5 with AMD Radeon Pro 5300 I'm using ffmpeg 4.3.1 to convert videos from h264 to h265 and initially I was excited to discover that I can use my Mac's GPU to speed up the conversion with the flag hevc_videotoolbox.

Ffmpeg mac