[Webkit-unassigned] [Bug 85851] MediaStream API: support MediaStreamRecorder implementation

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=85851

--- Comment #65 from Marcos G. <marcosdg3 at gmail.com> ---
I had 'Modern WebAudio API' enabled in experimental features which prevented sound from being recorded. After disabling and restarting the browser, audio is recorded. The video is corrupted though.

Also updating my audio constraints to: 
{sampleRate: 24000, noiseSuppression: true, echoCancellation: true} 
prevented audio recording. 

Noting that the video constraints are ignored as well. 

Output from ffprobe for video recording:

[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbd52008200] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 640x480, 1 kb/s): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'safari.mp4':
  Metadata:
    major_brand     : iso5
    minor_version   : 1
    compatible_brands: isomiso5hlsf
    creation_time   : 2020-09-22T20:16:42.000000Z
  Duration: 20:44:27.94, start: 2.249333, bitrate: 1 kb/s
    Stream #0:0(und): Video: h264 (avc1 / 0x31637661), none, 640x480, 1 kb/s, SAR 1:1 DAR 4:3, 30.05 fps, 600 tbr, 600 tbn, 1200 tbc (default)
    Metadata:
      creation_time   : 2020-09-22T20:16:42.000000Z
      handler_name    : Core Media Video
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 174 kb/s (default)
    Metadata:
      creation_time   : 2020-09-22T20:16:42.000000Z
      handler_name    : Core Media Audio

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