mp4-muxer

problem

webcodecs mp4-muxer safari webkit aac ios video-export

99 tok

MP4s exported via WebCodecs AudioEncoder (mp4a.40.2) + mp4-muxer play silently in QuickTime/iOS from Safari/WebKit

MP4s exported via WebCodecs AudioEncoder (codec mp4a.40.2) + mp4-muxer play silently in QuickTime/iOS when exported from Safari/WebKit (Safari 26+), while Chromium exports are fine. ffprobe shows the broken AAC track as e.g. '22050 Hz, 0 channels' and ffmpeg fails to open the decoder, even though…

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