[FFmpeg-trac] #6852(ffmpeg:new): Encoding process gets stuck and cpu load goes to 100% on Linux (ffmpeg version 2.8.13)
FFmpeg
trac at avcodec.org
Wed Nov 22 16:33:03 EET 2017
#6852: Encoding process gets stuck and cpu load goes to 100% on Linux (ffmpeg
version 2.8.13)
-------------------------------------+-------------------------------------
Reporter: fcarvalho | Type: defect
Status: new | Priority: important
Component: ffmpeg | Version: 2.8.11
Keywords: ffmpeg | Blocked By:
encoding mp4 process stuck | Reproduced by developer: 1
Blocking: |
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
I am having issues with ffmpeg version 2.8.13 while trying to encode a
ulaw to mp4. For more than 95% of the files it works fine, but some of the
encoding process simply get stuck and the cpu load goes up to 100% until i
kill the process.
Details:
- Command line: /bin/ffmpeg -f mulaw -ar 8000 -y -i
/home/recording_outbound_394485.ulaw -strict -2
/home/recording_outbound_394485.mp4
- I am running on CentOS Linux release 7.3.1611 (Core)
- On version 2.8.11 and 2.8.13 the process gets stuck with 100% cpu load
- On version 2.5.4 the same files that cause the ffmpeg encoding process
to get stuck work as expected in a couple of seconds.
- On windows version 2.2.2 it works too and the file is encoded to mp4 as
expected.
Command ran with valgrind:
valgrind /bin/ffmpeg -f mulaw -ar 8000 -y -i
/home/recording_outbound_394485.ulaw -strict -2
/home/recording_outbound_394485.mp4
==48708== Memcheck, a memory error detector
==48708== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==48708== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright
info
==48708== Command: /bin/ffmpeg -f mulaw -ar 8000 -y -i
/home/recording_outbound_394485.ulaw -strict -2
/home/recording_outbound_394485.mp4
==48708==
ffmpeg version 2.8.13 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11)
configuration: --prefix=/usr --bindir=/usr/bin
--datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg
--libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2
-g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-
strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64
-mtune=generic' --extra-ldflags='-Wl,-z,relro ' --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3
--enable-bzlib --disable-crystalhd --enable-gnutls --enable-ladspa
--enable-libass --enable-libcdio --enable-libdc1394 --disable-indev=jack
--enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal
--enable-libopenjpeg --enable-libopus --enable-libpulse --enable-
libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora
--enable-libvorbis --enable-libv4l2 --enable-libx264 --enable-libx265
--enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample
--enable-postproc --enable-pthreads --disable-static --enable-shared
--enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64
--enable-runtime-cpudetect
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
[mulaw @ 0x162de840] Estimating duration from bitrate, this may be
inaccurate
Guessed Channel Layout for Input Stream #0.0 : mono
Input #0, mulaw, from '/home/recording_outbound_394485.ulaw':
Duration: 00:04:17.12, bitrate: 64 kb/s
Stream #0:0: Audio: pcm_mulaw, 8000 Hz, 1 channels, s16, 64 kb/s
[aac @ 0x163093c0] Too many bits per frame requested, clamping to max
Output #0, mp4, to '/home/recording_outbound_394485.mp4':
Metadata:
encoder : Lavf56.40.101
Stream #0:0: Audio: aac ([64][0][0][0] / 0x0040), 8000 Hz, mono, fltp,
48 kb/s
Metadata:
encoder : Lavc56.60.100 aac
Stream mapping:
Stream #0:0 -> #0:0 (pcm_mulaw (native) -> aac (native))
Press [q] to stop, [?] for help
size= 322kB time=00:01:04.51 bitrate= 40.9kbits/s
===>> And it gets stuck <<===
Unfortunatelly i can't attach the audio file (ulaw) due to client's
privacy.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/6852>
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