An easy way to start using VVC / AV1 / HEVC / H264 / VP9 / VP8 encoding. AOM, RAV1E, SVT-AV1, SVT-VP9, VPX, x265, x264, VTM(Experimental) are supported.
Example with default parameters:
av1an -i input
With your own parameters:
av1an -i input -enc aom -v "--cpu-used=3 --end-usage=q --cq-level=30 --threads=8" -w 10
--split_method aom_keyframes --target_quality 95 --vmaf_path "vmaf_v0.6.1.pkl" -min_q 20 -max_q 60
-ff "-vf scale=-1:1080" -a "-c:a libopus -ac 2 -b:a 192k" -s scenes.csv -log my_log -o output
-i --input Input file(s), or Vapoursynth (.py,.vpy) script (relative or absolute path)
-o --output_file Name/Path for output file (Default: (input file name)_(encoder).mkv)
Output file ending is always `.mkv`
-enc --encoder Encoder to use
(`aom`,`rav1e`,`svt_av1`,`svt_vp9`,`vpx`,`x265`, `x264`,`vvc`)
Default: aom
Example: -enc rav1e
-v --video_params Encoder settings flags (If not set, will be used default parameters.)
Must be inside ' ' or " "
-p --passes Set number of passes for encoding
(Default: AOMENC: 2, rav1e: 1, SVT-AV1: 1, SVT-VP9: 1,
VPX: 2, x265: 1, x264: 1, VVC:1)
-w --workers Override number of workers.
-r --resume If encode was stopped/quit resumes encode with saving all progress.
Resuming automatically skips scenedetection, audio encoding/copy,
splitting, so resuming only possible after actual encoding is started.
Temp folder must be present to resume.
--no_check Skip checking numbers of frames for source and encoded chunks.
Needed if framerate changes to avoid console spam.
By default, any differences in frames of encoded files will be reported.
--keep Doesn't delete temporary folders after encode has finished.
-q --quiet Do not print tqdm to the terminal.
-log --logging Path to .log file(By default created in temp folder)
--temp Set path for the temporary folder. Default: .temp
--mkvmerge Use mkvmerge for concatenating instead of FFmpeg.
Use when concatenation fails.
-c --config Save/Read config file with encoder, encoder parameters,
FFmpeg and audio settings.
Options provided to cli overwrite config values.
All options except in/out/VMAF/log/temp/config paths are saved.
--webm Outputs webm file.
Use only if you're sure the source video and audio are compatible.
-a --audio_params FFmpeg audio settings (Default: copy audio from source to output)
Example: -a '-c:a libopus -b:a 64k'
-ff --ffmpeg FFmpeg options video options. Applied to each encoding segment individually.
(Warning: Cropping doesn't work with Target VMAF mode without
specifying it in --vmaf_filter)
Example:
--ff " -vf scale=320:240 "
-fmt --pix_format Setting custom pixel/bit format for piping
(Default: 'yuv420p10le')
Options should be adjusted accordingly, based on the encoder.
--split_method Method used for generating splits.(Default: PySceneDetect)
Options: `pyscene`, `aom_keyframes`, `none`
`pyscene` - PyScenedetect, content based scenedetection
with threshold.
`aom_keyframes` - using stat file of 1 pass of aomenc encode
to get exact place where encoder will place new keyframes.
(Keep in mind that speed also depends on set aomenc parameters)
`ffmpeg` - Uses FFmpeg built in content based scene detection
with threshold. Slower and less precise than pyscene but requires
fewer dependencies.
`none` - skips scenedetection. Useful for splitting by time
-cm --chunk_method Determine the method in which chunks are made for encoding.
By default the best method is selected automatically in this order:
vs_ffms2 > vs_lsmash > hybrid
['hybrid'(default), 'select', 'vs_ffms2'(Recommended), 'vs_lsmash']
-tr --threshold PySceneDetect threshold for scene detection Default: 35
-s --scenes Path to file with scenes timestamps.
If the file doesn't exist, a new file will be generated in the current folder
First run to generate stamps, all next reuse it.
Example: "-s scenes.csv"
-xs --extra_split Adding extra splits if frame distance between splits bigger than the
given value. Pair with none for time based splitting or with any
other splitting method to break up massive scenes.
Example: 1000 frames video with a single scene,
-xs 200 will add splits at 200,400,600,800.
--min_scene_len Specifies the minimum number of frames in each split.
--target_quality Quality value to target.
VMAF used as substructure for algorithms.
Supported in all encoders supported by Av1an except for VVC.
Best works in range 85-97.
When using this mode specify full encoding options.
Encoding options must include quantizer based mode,
and some quantizer option provided. (This value will be replaced)
`--crf`,`--cq-level`,`--quantizer` etc
--target_quality_method Type of algorithm for use.
Options: per_shot, per_frame.
Per frame is only supported in SVT-AV1.
--min_q, --max_q Min,Max Q values limits
If not set by the user, the default for encoder range will be used.
--vmaf Calculate VMAF after encode is done and make a plot.
--vmaf_plots Make plots for target quality search decisions
(Exception: early skips)
Saved in the temp folder by default.
--vmaf_path Custom path to libvmaf models.
example: --vmaf_path "vmaf_v0.6.1.pkl"
Recomended to place both files in encoding folder
(`vmaf_v0.6.1.pkl` and `vmaf_v0.6.1.pkl.model`)
(Required if VMAF calculation doesn't work by default)
--vmaf_res Resolution scaling for VMAF calculation,
vmaf_v0.6.1.pkl is 1920x1080 (by default),
vmaf_4k_v0.6.1.pkl is 3840x2160 (don't forget about vmaf_path)
--probes Number of probes for interpolation.
1 and 2 probes have special cases to try to work with few data points.
The optimal level is 4-6 probes. Default: 4
--vmaf_filter Filter used for VMAF calculation. The passed format is filter_complex.
So if crop filter used ` -ff " -vf crop=200:1000:0:0 "`
`--vmaf_filter` must be : ` --vmaf_filter "crop=200:1000:0:0"`
--probing_rate Setting rate for VMAF probes (Every N frame used in probe, Default: 4)
--n_threads Limit number of threads that are used for VMAF calculation
Example: --n_threads 12
(Required if VMAF calculation gives error on high core counts)
Splitting video by scenes for parallel encoding because AV1 encoders are currently not very good at multithreading and encoding is limited to a very limited number of threads.
- PySceneDetect used for splitting video by scenes and running multiple encoders.
- Vapoursynth script input support.
- Fastest way to encode AV1 without losing quality, as fast as many CPU cores you have :).
- Target Quality mode. Targeting end result reference visual quality. VMAF used as a substructure
- Resuming encoding without loss of encoded progress.
- Simple and clean console look.
- Automatic detection of the number of workers the host can handle.
- Building encoding queue with bigger files first, minimizing waiting for the last scene to encode.
- Both video and audio transcoding with FFmpeg.
- Logging of the progress of all encoders.
-
Prerequisites:
- Windows Prebuilds
- Install Python3
When installing under Windows, select the optionadd Python to PATHin the installer - Install FFmpeg
- Recommended to install vapoursynth with lsmash for faster and better processing
-
Encoder of choice:
- Install AOMENC
- Install rav1e
- Install SVT-AV1
- Install SVT-VP9
- Install vpx VP9, VP8 encoding
- Install VTM VVC encoding test model
-
Optional :
-
With a package manager:
-
Manually:
- Clone Repo or Download from Releases
python setup.py install
-
Also: On Ubuntu systems, the packages
python3-opencvandlibsm6are required
Av1an can be run in a Docker container with the following command if you are in the current directory
docker run -v "$(pwd)":/videos --user $(id -u):$(id -g) -it --rm masterofzen/av1an:latest -i S01E01.mkv {options}Docker can also be built by using
docker build -t "av1an" .To specify a different directory to use you would replace $(pwd) with the directory
docker run -v /c/Users/masterofzen/Videos:/videos --user $(id -u):$(id -g) -it --rm masterofzen/av1an:latest -i S01E01.mkv {options}The docker image has the following tags
| Tag | Description |
|---|---|
| latest | Contains the latest stable av1an version release |
| master | Contains the latest av1an commit to the master branch |
| sha-##### | Contains the commit of the hash that is referenced |
| #.## | Stable av1an version release |
The --user flag is required to avoid permission issues with the docker container not being able to write to the location, if you get permission issues ensure your user has access to the folder that you are using to encode.
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