2018-06-20 16:50 GMT+02:00, Ariel Frailich <ar...@websiteatelier.com>:
> Input: mostly ProRes (10-20Gb), HD to 4K res, 90 mins average length. > > Output: a set of .mp4 files at 5 different resolutions, up to 1080. > These are further processed (primarily bento4) to create multiple/ > variable bitrate HLS and DASH streams, with encryption and DRM. (The most important information would be the target codec.) > On our office machine (iMac, 3.2 GHz Intel Core i5, 8Gb, macOS > Sierra), encoding typically takes 6-7 hours per film. Ideally, we > would like to cut this down to 1-2 hours. > > WHAT WE NEED TO KNOW > > 1. Hardware: what's a good hardware configuration for our needs? That depends on the question if you want hardware or software encoding (that nobody here can answer, only you). > CPUs, cores, RAM, RAM disk, graphics cards, etc. The more cpu cores the faster software encoding is, you will find information online about the performance of graphic cards for hardware encoding. > Also, which version of Linux is recommended (or which to avoid). No limitations known. (musl 32bit is unsupported which we are not allowed to document but this will not hit you.) > 2. ffmpeg setup: how should ffmpeg be compiled to best take > advantage of the particular hardware configuration? $ ./configure --enable-gpl && make for hardware encoding, $ ./configure --enable-gpl --enable-libx264 && make for software encoding. > 3. Video processing: how should ffmpeg be run to maximize > speed and efficiency, and to produce the most suitable files > for our needs? I may misunderstand (and this is possibly not an FFmpeg- related question) but for software encoding, remember that threads do not scale well, single-threaded encoding (of multiple files at the same time) is always most efficient. Carl Eugen PS: In case you don't know: Hardware encoding is potentially faster than software encoding but provides worse quality for a given bitrate or larger files for a given quality. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
