[FFmpeg-trac] #6592(undetermined:new): DNxHD error during encoding: too many threads

[FFmpeg]

#6592: DNxHD error during encoding: too many threads
-------------------------------------+-------------------------------------
             Reporter:  ralambda     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  DNxHD, too   |               Blocked By:
  many threads                       |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 '''Summary:'''
 When encoding DNxHD mxf file the encoder crashes with the error "too many
 threads". I've reproduced this error with various input files of various
 resolutions and codecs including h264 (yuv420, high, 5.1), AVC Intra, and
 MPEG-2.

 '''Error:'''
 {{{
 [dnxhd @ 0x3e92c00] too many threads
 Error initializing output stream 0:0 -- Error while opening encoder for
 output stream #0:0 - maybe incorrect parameters such as bit_rate, rate,
 width or height
 }}}

 '''How to reproduce:'''
 {{{
 /usr/local/bin/ffmpeg -v 9 -loglevel 99 -y -r 23.976 -i input_file -c:v
 dnxhd -b:v 36M -pix_fmt:v yuv422p -s:v 1920x1080 -an output_file.mxf
 }}}
 '''ffmpeg version'''
 {{{
 ffmpeg version N-86980-g62b7553 Copyright (c) 2000-2017 the FFmpeg
 developers
 built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11)
 configuration: --prefix=/home/alchemist/ffmpeg_build --extra-
 cflags=-I/home/alchemist/ffmpeg_build/include --extra-
 ldflags='-L/home/alchemist/ffmpeg_build/lib -ldl'
 --bindir=/home/alchemist/bin --pkg-config-flags=--static --enable-gpl
 --enable-libfdk_aac --enable-libfreetype --enable-libmp3lame --enable-
 libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-
 libx265 --enable-nonfree
 libavutil      55. 73.100 / 55. 73.100
 libavcodec     57.102.100 / 57.102.100
 libavformat    57. 76.100 / 57. 76.100
 libavdevice    57.  7.100 / 57.  7.100
 libavfilter     6. 98.100 /  6. 98.100
 libswscale      4.  7.102 /  4.  7.102
 libswresample   2.  8.100 /  2.  8.100
 libpostproc    54.  6.100 / 54.  6.100
 }}}
 '''Built on:''' CentOS 7 from source (Git master)

 The command above worked successfully on the last version I had built.
 Unfortunately I don't have the build info for that version. I compiled
 from the git today (August 16, 2017) and now getting the error.

 The issue might be related to this update:
 [https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/9835ee60da31184dd6f6700328e75c78fa485efe]

 The terminal output is over 26,000 lines when using `-v 9 -loglevel 99`.
 Here's the output once encoding starts:
 {{{
 [dnxhd @ 0x5ac2e80] cid 1253
 [dnxhd @ 0x6018820] cid 1253
 [dnxhd @ 0x61489c0] cid 1253
 [dnxhd @ 0x6278d60] cid 1253
 [dnxhd @ 0x63a8f00] cid 1253
 [dnxhd @ 0x64d9140] cid 1253
 [dnxhd @ 0x66093c0] cid 1253
 [dnxhd @ 0x6739760] cid 1253
 [dnxhd @ 0x6869900] cid 1253
 [dnxhd @ 0x6999ca0] cid 1253
 [dnxhd @ 0x6ac9e40] cid 1253
 [dnxhd @ 0x6bfa1e0] cid 1253
 [dnxhd @ 0x6d2a380] cid 1253
 [dnxhd @ 0x6e5a720] cid 1253
 [dnxhd @ 0x6f8a8c0] cid 1253
 [dnxhd @ 0x70bac60] cid 1253
 [dnxhd @ 0x71eae00] cid 1253
 [dnxhd @ 0x731b1a0] cid 1253
 [dnxhd @ 0x744b340] cid 1253
 [dnxhd @ 0x757b6e0] cid 1253
 [dnxhd @ 0x76ab880] cid 1253
 [dnxhd @ 0x77dbc20] cid 1253
 [dnxhd @ 0x790bdc0] cid 1253
 [dnxhd @ 0x7a3c160] cid 1253
 [dnxhd @ 0x7b6c300] cid 1253
 [dnxhd @ 0x7c9c6a0] cid 1253
 [dnxhd @ 0x7dcc840] cid 1253
 [dnxhd @ 0x7efcbe0] cid 1253
 [dnxhd @ 0x802cd80] cid 1253
 [dnxhd @ 0x815d120] cid 1253
 [dnxhd @ 0x828d2c0] cid 1253
 [dnxhd @ 0x83bd660] cid 1253
 [dnxhd @ 0x84ed800] cid 1253
 [dnxhd @ 0x861dba0] cid 1253
 [dnxhd @ 0x874dd40] cid 1253
 [dnxhd @ 0x887e0e0] cid 1253
 [dnxhd @ 0x89ae280] cid 1253
 [dnxhd @ 0x8ade620] cid 1253
 [dnxhd @ 0x8c0e7c0] cid 1253
 [dnxhd @ 0x8d3eb60] cid 1253
 [dnxhd @ 0x3e92c00] cid 1253
 [dnxhd @ 0x3e92c00] too many threads
 Error initializing output stream 0:0 -- Error while opening encoder for
 output stream #0:0 - maybe incorrect parameters such as bit_rate, rate,
 width or height
 [AVIOContext @ 0x3e96d80] Statistics: 0 seeks, 0 writeouts
 [AVIOContext @ 0x3e710c0] Statistics: 2790563 bytes read, 1 seeks
 Conversion failed!
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6592>
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