[FFmpeg-trac] #6204(undetermined:new): AAC-only hls stream slowly exceeds file descriptors

[FFmpeg]

#6204: AAC-only hls stream slowly exceeds file descriptors
-------------------------------------+-------------------------------------
             Reporter:  ncon         |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  hls          |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by ncon):

 Replying to [comment:1 cehoyos]:
 > Is the issue reproducible if the input is {{{-f lavfi -i sine}}}?

 Yes:

 {{{
 [hls muxer @ 0x3f36660] deleting old segment segment_128_0000001011.ts
 [file @ 0x5e23c40] Setting default whitelist 'file,crypto'
 [file @ 0x5fc7300] Setting default whitelist 'file,crypto'
 av_interleaved_write_frame(): Too many open files
 No more output streams to write to, finishing.
 [AVIOContext @ 0x5e23b00] Statistics: 0 seeks, 0 writeouts
 [hls muxer @ 0x3f36660] deleting old segment segment_128_0000001013.ts
 [hls muxer @ 0x3f36660] deleting old segment segment_128_0000001012.ts
 [file @ 0x3f61200] Setting default whitelist 'file,crypto'
 [hls muxer @ 0x3f36660] EXT-X-MEDIA-SEQUENCE:1018
 [AVIOContext @ 0x3f3d4a0] Statistics: 0 seeks, 1 writeouts
 size=N/A time=00:17:00.00 bitrate=N/A speed=46.6x
 video:0kB audio:15975kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 Input file #0 (sine):
   Input stream #0:0 (audio): 43930 packets read (89968640 bytes); 43930
 frames decoded (44984320 samples);
   Total: 43930 packets (89968640 bytes) demuxed
 Output file #0 (playlist_128.m3u8):
   Output stream #0:0 (audio): 43930 frames encoded (44984320 samples);
 43929 packets muxed (16358478 bytes);
   Total: 43929 packets (16358478 bytes) muxed
 43930 frames successfully decoded, 0 decoding errors
 [aac @ 0x3f384c0] Qavg: 2072.816
 Conversion failed!
 }}}

 > Does it only happen using the aac encoder?

 No, it also happens with libfdk_aac and libmp3lame (which would make no
 sense on hls)

 > Are two output streams necessary to reproduce the issue or does it also
 happen with one output stream?

 One output stream is sufficient (see above output)

 > Do you think this is a regression?

 I don't know yet, i recently ran the hls muxer for hours with no issues,
 but this is not comparable as the output had a video stream. I will test
 it against some older versions

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Ticket URL: <https://trac.ffmpeg.org/ticket/6204#comment:2>
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