xHE-AAC (USAC) audio glitches after video seeking

[Raccffy]

Video seeking causes xHE-AAC (USAC) audio to glitch for a second.

System

• OS: Windows 10.0.19044 (64-bit) (Build 21H2)
• LAV Filters Version: 0.80.0.9

Tested Video Players

With LAV Filters

• MPC-HC (Version: 2.5.4 (38c090ec9), Build date: Oct 1 2025, K-Lite Codec Pack Mega Install): Constant audio glitches during keyframe seeking.
• Windows Media Player 12: Same as MPC-HC.

Without LAV Filters

• ffplay (Version: 8.0-full_build-www.gyan.dev): No glitches at all, but causes a video to slow down to sync with delayed audio stream.

Reproduction Steps

1. Install MPC-HC and LAV Filters via K-Lite Codec Pack or using any other method. Make sure that LAV Filters are decoding video and audio streams.
2. Open MPC-HC options (View tab --> Options...), select Tweaks block, then enable Fast seek (on keyframe) option and choose Nearest keyframe.
3. Download any source video (provided below) and open it in MPC-HC.
4. Press ← and → to seek the video (or use Shift+Left or Shift+Right if you haven't enabled fast seek).

If audio glitches - bug is successfully reproduced.

Video

Warning: Very loud noises and screeches.

lav_filters_xheaac_video_seeking_issue.mp4

Source Videos

Audio was encoded using exhale (Version: 1.2.1 (x64, built on May 10 2025)) with presets 1 and b. ffmpeg was used for video and audio streams merging.

Preset 1 (ISO/MPEG-D Extended HE-AAC)

input_xheaac_preset_1.mp4

Preset b (Extended HE-AAC using eSBR)

input_xheaac_preset_b.mp4