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w3c/webcodecs
VideoDecoder output guarantees

My use case requires me to decode multiple video streams at the same time. The source files can be of extremely high bitrate, 4K videos, so I would like to be mindful of how I use the GPU. My root issue ...
  • bartadaniel
  • 3
  • Opened 
    5 days ago
  • #900

w3c/webcodecs
Delayed H264 decoding on browsers when using VideoDecoder for macOS devices

I have been trying to put together an end to end H264 real-time streaming implementation from macOS devices to browsers. The macOS implementation uses native hardware accelerated APIs to encoder the frames, ...
  • mycodingneeds
  • 3
  • Opened 
    5 days ago
  • #899

w3c/webcodecs
The Compute Layout and Allocation Size algorithm is rounding up subsampled height but not subsampled width

When reading https://www.w3.org/TR/webcodecs/#videoframe-compute-layout-and-allocation-size, I can see: - Set computedLayout’s sourceTop to the result of the division of truncated parsedRect.y by sampleHeight, ...
  • youennf
  • Opened 
    on May 27
  • #897

w3c/webcodecs
Hardware acceleration and fingerprinting

I just filed a bug on Bugzilla but what Firefox is doing is spec compliant, so I wanted to raise the issue here too. Background I m making a website that heavily utilizes WebCodecs. I need to determine ...
  • kixelated
  • 1
  • Opened 
    on May 21
  • #896

w3c/webcodecs
Add rtpTimestamp to VideoFrameMetadata registry

We would like to propose the addition of a new optional field, rtpTimestamp, to the VideoFrameMetadata registry. Field name rtpTimestamp Type double Description An optional RTP timestamp indicating ...
  • agiyengar
  • 2
  • Opened 
    on Apr 29
  • #893

w3c/webcodecs
ROI-based encoding with CBR/CQP mode

A typical video conferencing app may perform video segmentation and apply background replacement or blur, then encode. If the segmentation mask can be delivered to WebCodecs as the input for ROI-based ...
  • taste1981
  • 2
  • Opened 
    on Apr 24
  • #892

w3c/webcodecs
ios system viersion is 17.5.1、iphone is 15 pro max、play error

ios system viersion is 17.5.1、iphone is 15 pro max、play error。 play url is https://github.com/user-attachments/assets/3cd37b98-3349-4b58-9f11-dcdaf835f012
  • duanyuanyuan01
  • 1
  • Opened 
    on Apr 22
  • #891

w3c/webcodecs
ISO/IEC 14496-15:2019 was withdrawn

From https://w3c.github.io/webcodecs/hevc_codec_registration.html#informative New version available: ISO/IEC 14496-15:2024
editorial
registry
  • plehegar
  • Opened 
    on Apr 18
  • #890

w3c/webcodecs
Using VideoDecoder for security camera app leads to codec reclaimation

As suggested in #121, I m opening a new issue to discuss my use case. I have just started using WebCodecs for a security camera application, and my VideoDecoders are getting reclaimed due to inactivity ...
  • dominic-p
  • 6
  • Opened 
    on Apr 17
  • #889

w3c/webcodecs
AudioDecoderConfig.description should be `[AllowShared]`

The video side and chromium are [AllowShared]. This is copied, regardless, so it doesn t matter, it s just for ergonomics. Gecko bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1958020 Chromium code: ...
  • padenot
  • 1
  • Opened 
    on Apr 17
  • #887
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