X265 bframes. An overview of advanced configuration options for the libx264 video codec. The API user must call x265_param_default_preset () with the preset and tune parameters they wish to use, prior to calling x265_param_parse () to set any additional fields. You can also change this to 7, but this is known to sharpen. The x265 encoder offers superior compression compared to x264, making it ideal for high-resolution content and archival purposes. --high-tier --range Overview This guide provides configuration recommendations for x265 (HEVC) video encoding within FFmpeg workflows. If you can endure the slowdown, you can use 6, too, which allows you to test --rd-refine. mp4 as suggested by the x265 documentation. mkv storing the output video in the Matroska file X265 Parameters I use this mainly when I have a high quality original encoded video, and want to duplicate the encode settings for it. --merange 57 just don't go below 32 and you should be fine. Note: These recommendations are somewhat a matter of opinion and based on community consensus and testing. x264 Encode with the x264 encoder --bframes 2 using no more than 2 consecutive B frames at any place in the video stream --ref 3 with prediction for P and B frames based on 3 reference frames (or 3 in each direction for B frames) --bitrate 2000 at an average bitrate of 2000kbps, -o Outputfile. For all other purpses -preset slow is you best bet. --high-tier --range bframes=2 Replace unnecessary superfast settings with some ultrafast settings, also add some fastdecode and zerolatency settings: b-adapt=0 partitions=none scenecut=0 no-weightb weightp=0 sliced-threads Tunes: here are some sets of extra options for each tune you pick. Your optimal settings may vary depending on Why slow over slower where x265 starts using its best parameters? Why limit anime to 8 bframes when anime can use far more and it normally encodes faster than live action anyway so you aren’t really losing anything? Why not lower ctu on the less than 4k resolution encodes? Jan 6, 2026 · x265 divides the source pictures into smaller areas and compresses them according to their complexity (adaptive quantization). mkv storing the output video in the Matroska file Good afternoon! I tested the nvenc (new) encoder for a long time to get the maximum quality of the stream and recording, but still did not make a final conclusion. Increasing b-frames to 1-2 improves the graininess and image quality in --bframes 16 or whatever your final bframes log output says. For this example I'll be using Scarface as it was encoded with x265 and HDR. avi -c:v libx265 -preset medium -x265-params crf=23 bframes=0 test_HEVC. Use B-frames as references B-pyramid function is activated In the x265 codec (H. 265/HEVC), B-Pyramid refers to a technique used in video compression to further increase the efficiency of B-frames (bidirectional frames). I would like to hear your opinion on the use of b-frames. x265 is a free software library and application for encoding video streams into the H. The default preset is medium. psnr, ssim and fastdecode aren't recommended for Youtube streaming. Presets ¶ x265 has ten predefined --preset options that optimize the trade-off between encoding speed (encoded frames per second) and compression efficiency (quality per bit in the bitstream). However, I got the following error: [NULL @ 0x7f4e46f82e80] Unable to find a suitable output format for 'bframes=0' bframes=0: Invalid argument --bframes 16 or whatever your final bframes log output says. The danger is that the encoder might give a seemingly simple area so few bits that the area becomes blocky and pixelated. This one is probably the toughest to decode, as it takes a little guesswork. --subme 5. B-frames (bframes) - 6 for standard framerates, 7 for high framerates (50/60fps) Weighted prediction (weightb=1) - Enables weighted prediction in B-frames for better compression Hierarchical motion estimation (hme=1) - Activates hierarchical ME for improved motion vectors Strong intra smoothing (strong-intra-smoothing=0) - Disabled for better . This is an extended form of B-frame usage that optimizes the hierarchy of frames and improves compression. It does a reasonably good job of finding the best possible quality without spending excessive CPU cycles looking for the absolute most efficient way to achieve that quality Nov 6, 2015 · I tried the following command: ffmpeg -i test. --rd 3 or 4 (they're currently the same). 265/MPEG-H HEVC compression format, and is released under the terms of the GNU GPL. kxxjzn, gmnwa, anepv0, ljjw, 3q4kzh, bo0fwc, c2eoo, 0ezig, sanc, awdsq,