The only setting that seems to work is the video bit rate (-b:v). 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.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |