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Feature Request: support for pcm or audio/wav output from mediaRecorder
Reported by
jbnesl...@gmail.com,
Nov 6 2017
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Issue descriptionUserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.75 Safari/537.36 Steps to reproduce the problem: 1. Pass a mimeType of audio/wav to a MediaRecorder instance What is the expected behavior? mediaRecorder.onDataAvailable should be passed raw uncompressed audio data. What went wrong? mediaRecorder.onDataAvailable is passed compressed audio data using a default codec. Did this work before? No Does this work in other browsers? No Chrome version: 62.0.3202.75 Channel: stable OS Version: OS X 10.12.6 Flash Version: This is necessary if you need to capture uncompressed audio data. Most audio editors and producers will only work with lossless wav files. For these cases, the MediaRecorder is unusable at the moment and the only alternative is to use scriptProcessorNodes which have issues with dropping frames.
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Nov 7 2017
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Nov 7 2017
Instead of audio/wav, there's work ongoing to produce uncompressed PCM in a Matroska container, see e.g. https://crrev.com/c/749864 & associated. ttay@, do we have a crbug.com for your work?
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Nov 8 2017
The crbug I asked for in c3 is https://crbug.com/782492 . jbneslein@ does that cover your needs?
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Nov 9 2017
I believe so. Would this make it possible to record video along with uncompressed pcm audio and have that available in the onDataAvailable event?
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Nov 9 2017
Thank you for providing more feedback. Adding requester "mcasas@chromium.org" to the cc list and removing "Needs-Feedback" label. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Nov 9 2017
#5: yes it would! Note that you'd need to specify it in the MR ctor, mr = new MediaRecorder(stream, "video/webm;codecs=pcm_f32le"); or some such, see the other bug. The produced file will be a matroska, so technically the extension, if and when saved, should be .mkv.
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Nov 9 2017
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Nov 15 2017
The NextAction date has arrived: 2017-11-15 |
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Comment 1 by ligim...@chromium.org
, Nov 6 2017