Av1an

[charliewares13-hash]

Av1an for VMAF not found

[frankie1024]

Hi, thanks for reporting this. To help diagnose the issue, could you provide the following information?

1. Av1an version — run av1an --version in a terminal
2. FFmpeg version — run ffmpeg -version and check if it mentions --enable-libvmaf
3. VapourSynth version — run vspipe --version
4. The exact error message you're seeing — a screenshot or terminal output would be very helpful

The most likely cause is that your FFmpeg build was not compiled with --enable-libvmaf. Av1an uses FFmpeg's libvmaf filter internally for VMAF target quality probing, and will fail if this dependency is missing. See Av1an #1102 for reference.

Additionally, if you are using VapourSynth R74 or later, Av1an is currently incompatible with it due to VSScript API changes — see Av1an #1239. In that case, downgrading to VapourSynth R73 would be a temporary workaround.

[charliewares13-hash]

https://prnt.sc/yDuj32oSswTz i am back to r73

[frankie1024]

Hi, thanks for following up and testing with R73. Unfortunately, the error is a known upstream issue in av1an's VapourSynth Rust binding — see av1an #1239. The av1an team is aware of this but a fix has not been released yet (latest av1an v0.5.2 still has this problem).

Due to these upstream limitations, we are unable to fully support the auto encode workflow at this time. We apologize for the inconvenience and will resolve this as soon as av1an ships a compatible release.

[frankie1024]

fixed it in 1.9.2

[charliewares13-hash]

nice aim go test thank you :-)

[charliewares13-hash]

https://prnt.sc/HwB5lSGLca5r :(

[frankie1024]

Sorry for that. Please attach the log file from the failed run. The generic Encoding loop terminated after worker failure message can hide the real chunk-level error, so the full log is needed to confirm the root cause.