| AAC AudioEncoder always treats the first 1024 audio samples as silence | Safari | David (@dpayr) | Open |
| AVC VideoEncoder on Windows and Linux produces invalid AVCC record in decoder description | Firefox | @Vanilagy | Open |
| AVC VideoEncoder shifts EncodedVideoChunk timestamps by their duration | Firefox | @Vanilagy | Open |
| Software AVC VideoDecoder drops initial B-frames | Chrome | @Vanilagy | Fixed in 156.0.8064.0 |
| Rendering on a high-refresh-rate (144+ Hz) monitor throttles VideoDecoder by 5-10x | Chrome | @Vanilagy | Open |
| VideoEncoder does not respect visibleRect of VideoFrame, crops incorrectly | Chrome | @Vanilagy | Fixed in 153.0.8002.0 |
| AudioData.copyTo with interleaved f32 handles frameOffset incorrectly | Firefox | @JonnyBurger | Open |
| H.264 packet with "Unspecified" NALU (24..31) trips up key frame validation, erroring VideoDecoder | Chrome | @Vanilagy | Fixed in 145.0.7624.0 |
| H.264 VideoDecoder key frame detection fails for packets with an AUD not at the start | Chrome | @Vanilagy | Fixed in 151.0.7916.0 |
| YUV VideoFrame draws onto a canvas are 5-10x slower when resized | Chrome | @Vanilagy | Fixed in 145.0.7580.0 |
| AAC AudioEncoder produces incorrect decoder config description | Safari | @Vanilagy | Fixed |
| ArrayBuffer-backed YUV VideoFrame with visibleRect is rendered incorrectly (chroma channels are offset) | Safari | @Vanilagy | Fixed |
| AudioData.copyTo() crashes the tab with valid conversion | Safari | @JonnyBurger | Fixed |
| WebM audio plays back garbled when BlockGroup instead of SimpleBlock is used | Safari | @Vanilagy | Fixed |
| AudioEncoder emits humorous AAC bitrate suggestions in error message | Chrome | @Vanilagy | Fixed in 144.0.7527.0 |
| VideoEncoder encodeQueueSize behaves unpredictably after calling encode() | Chrome | @Vanilagy | Won't fix |
| AudioEncoder queue size not accurately reflected by encodeQueueSize | Chrome | @Vanilagy | Fixed in 145.0.7588.0 |
| WebCodecs VideoDecoder Outputs Frames in Incorrect Order | Safari | Jozef Chúťka | Fixed |
| HDR HEVC VideoFrame draws onto a canvas as fully transparent (regression) | Chrome | @Vanilagy | Fixed in 148 |
| VideoDecoder HEVC key frame detection is too strict; rejects packets that Chromium decodes just fine | Chrome | @Vanilagy | Fixed in 149.0.7820.0 |
| VideoDecoder fails on interlaced content when routed to hardware decoder | Chrome | @Vanilagy | Fixed in 144.0.7514.0 |
| VideoEncoder with VP8/VP9 fails with zero-duration VideoFrame | Chrome | @Vanilagy | Fixed in 142.0.7430.0 |
| VideoDecoder key frame detection too strict, rejects non-IDR AVC key frames, causing decoder error | Chrome | @Vanilagy | Open |
| VideoEncoder performance drastically degrades if the page needs to rerender | Chrome | @Vanilagy | Open |
| AudioDecoder.isConfigSupported() returns false positive | Chrome | @JonnyBurger | Fixed in 130.0.6711.0 |
| AudioDecoder doesn't respect chunks with negative timestamps, starts AudioData timestamps at 0 | Chrome | @Vanilagy | Fixed in 156.0.8070.0 |
| HEVC VideoEncoder on AMD hardware on Windows labels first emitted chunk as "delta" | Chrome | @Vanilagy | Won't fix |
| VideoPixelFormat I444AP12 is not recognized | Chrome | @Vanilagy | Open |
| VideoFrame RGBX -> RGB format conversion via .copyTo() outputs garbled data | Chrome | @Vanilagy | Fixed in 152.0.7941.0 |
| VideoEncoder encoding error surfaces AFTER flush() resolves, gets completely swallowed by close() | Chrome | @Vanilagy | Fixed in 152.0.7951.0 |
| VideoDecoder ignores VideoDecoderConfig.colorSpace for H.264 on macOS VideoToolbox and outputs bt709 | Chrome | @JonnyBurger | Open |
| VideoEncoder with bitrateMode: 'quantizer' has a large initial delay before emitting a chunk | Chrome | @Vanilagy | Open |