| Summary: | Pitch compensation on clips sped up by ~1000% or more may cause audio playback issues on those clips | ||
|---|---|---|---|
| Product: | [Applications] kdenlive | Reporter: | Alex <alexthornton9898> |
| Component: | Audio Effects & Transitions | Assignee: | Jean-Baptiste Mardelle <jb> |
| Status: | REPORTED --- | ||
| Severity: | normal | ||
| Priority: | NOR | ||
| Version First Reported In: | 23.04.1 | ||
| Target Milestone: | --- | ||
| Platform: | Microsoft Windows | ||
| OS: | Microsoft Windows | ||
| Latest Commit: | Version Fixed/Implemented In: | ||
| Sentry Crash Report: | |||
| Attachments: | Short clip of the issue at 5% volume, occurred immediately after enabling proxy clips (VOLUME WARNING) | ||
Created attachment 159799 [details] Short clip of the issue at 5% volume, occurred immediately after enabling proxy clips (VOLUME WARNING) SUMMARY Pitch compensation on clips sped up by ~1000% (+/-100%) or more may cause audio playback issues on those clips. Random noise will play at random times through the right audio channel during video playback, usually lasting less than 1 second, up to around 3 seconds. Occasionally, the random noise plays for the entire duration of the clip, the same noise repeats if the clip is replayed; restarting Kdenlive may change the noise that plays back, but it will still repeat when the clip is replayed. This random noise can be VERY loud. Audio playback on the left channel appears to be normal. STEPS TO REPRODUCE 1. Create a new project 2. Add a clip to the timeline 3. Speed up the clip to 1000% and enable "Pitch Compensation" 4. Turn down your volume and play the video preview Strangely, enabling proxy clips seems to more consistently cause the issue, tested on an existing project with sped up video already on the timeline. In this case the steps are: 1. Create a new project 2. Add a clip to the timeline 3. Speed up the clip to 1000% and enable "Pitch Compensation" 4. Open Project Settings and enable proxy clips 5. turn down your volume and play the video preview OBSERVED RESULT Random noise occasionally plays through the right audio channel, or for the entire duration of the clip. EXPECTED RESULT Audio plays back normally at the speed selected. SOFTWARE/OS VERSIONS OS: Windows 10 Version 22H2 (OS Build 19045.3086) KDE Frameworks Version: 5.105.0 Qt Version: 5.15.9 ADDITIONAL INFORMATION Playback works properly with pitch compensation disabled, at even higher speeds Original files are 1080p 60fps .mkv files with 3 audio tracks recorded using OBS Studio version 29.1.2 Maybe relevant OBS settings: Recording Format: .mkv Audio Encoder: FFmpeg AAC Audio Bitrate: 320Kbps (per track) Sample rate: 48kHz Channels: Stereo Video Encoder: NVIDIA NVENC AV1 Rate Control: CQP (Level 24) Keyframe Interval: 2s Preset: P7: Slowest Tuning: High Quality Profile: main Look-ahead and Psycho Visual Tuning: enabled Max B-frames: 2 System specs: CPU: Ryzen 7 3700X GPU: NVIDIA RTX 4090 Asus TUF RAM: 64GB DDR4 3200MHz (CL20) Storage: 2TB Crucial MX500 SATA SSD Audio interface: Behringer UCA-202 USB interface