[FFmpeg-trac] #9502(avdevice:new): Intermittent error when opening audio device with avfoundation (mac)

[FFmpeg]

#9502: Intermittent error when opening audio device with avfoundation (mac)
----------------------------------+---------------------------------------
             Reporter:  toots     |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  avdevice  |                  Version:  unspecified
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
----------------------------------+---------------------------------------
 We are having intermittent issues when quickly opening/closing
 avfoundation.

 The error that shows up:
 ```
 [avfoundation @ 0x7f964f032200] audio format is not supported
 ```

 The attached file can be used to reproduce the error. Please note that the
 original icecast connection details have been edited out.

 Full log:
 ```
 ./ffmpeg
 Starting ffmpeg connection test..
 Input #0, avfoundation, from 'default':
   Duration: N/A, start: 324489.404308, bitrate: 2822 kb/s
   Stream #0:0: Audio: pcm_f32le, 44100 Hz, stereo, flt, 2822 kb/s
 Output #0, mp3, to 'icecast':
   Metadata:
     TSSE            : Lavf58.76.100
   Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, s32p, 128 kb/s
 Reached max time!
 [Parsed_astats_1 @ 0x7f964ec41b00] Channel: 1
 [Parsed_astats_1 @ 0x7f964ec41b00] RMS level dB: -64.770078
 [Parsed_astats_1 @ 0x7f964ec41b00] Channel: 2
 [Parsed_astats_1 @ 0x7f964ec41b00] RMS level dB: -64.770078
 [Parsed_astats_1 @ 0x7f964ec41b00] Overall
 [libmp3lame @ 0x7f964f875000] 4 frames left in the queue on closing
 One iteration done..
 Input #0, avfoundation, from 'default':
   Duration: N/A, start: 324492.892676, bitrate: 2822 kb/s
   Stream #0:0: Audio: pcm_f32le, 44100 Hz, stereo, flt, 2822 kb/s
 Output #0, mp3, to 'icecast':
   Metadata:
     TSSE            : Lavf58.76.100
   Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, s32p, 128 kb/s
 Reached max time!
 [Parsed_astats_1 @ 0x7f964ec5ee40] Channel: 1
 [Parsed_astats_1 @ 0x7f964ec5ee40] RMS level dB: -64.933917
 [Parsed_astats_1 @ 0x7f964ec5ee40] Channel: 2
 [Parsed_astats_1 @ 0x7f964ec5ee40] RMS level dB: -64.933917
 [Parsed_astats_1 @ 0x7f964ec5ee40] Overall
 [libmp3lame @ 0x7f965100a800] 4 frames left in the queue on closing
 One iteration done..
 [avfoundation @ 0x7f964f032200] audio format is not supported
 errror: Input/output error
 One iteration done..
 ```

 Version: 4.4.1
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9502>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker