Your message dated Tue, 4 Jun 2013 21:32:37 +1000 (EST) with message-id <alpine.deb.2.02.1306042130550.8...@dirac.rather.puzzling.org> and subject line Re: Bug#637611: mplayer: redirected stdin from /dev/null causes 100% busy loop has caused the Debian Bug report #637611, regarding mplayer: redirected stdin from /dev/null causes 100% busy loop to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact ow...@bugs.debian.org immediately.) -- 637611: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=637611 Debian Bug Tracking System Contact ow...@bugs.debian.org with problems
--- Begin Message ---Package: mplayer Version: 3:1.0~rc4+svn20110505-0.2 Severity: normal It seems that relatively recently there has been a regression where the keyboard reading from /dev/stdin doesn't do appropriate error checking. If /dev/stdin is redirected from /dev/null (eg, when mplayer is run from a cronjob), strace shows: select(1, [0], NULL, NULL, {0, 10000}) = 1 (in [0], left {0, 9997}) read(0, "", 256) = 0 select(1, [0], NULL, NULL, {0, 10000}) = 1 (in [0], left {0, 9997}) read(0, "", 256) = 0 select(1, [0], NULL, NULL, {0, 10000}) = 1 (in [0], left {0, 9997}) read(0, "", 256) = 0 select(1, [0], NULL, NULL, {0, 10000}) = 1 (in [0], left {0, 9996}) read(0, "", 256) = 0 The parent process is stuck read()ing with a return code that should imply EOF. mplayer appears not to check for EOF, so just reads again immediately. Fortunately, the worker process is still doing its job, but my poor dualcore CPU in my laptop is getting a bit warm. (If I simply redirect /dev/stdin to a named pipe with no writer connected to it, then mplayer doesn't even start up because it's blocking on read. So that's not a suitable workaround) -- System Information: Debian Release: 6.0.2 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'oldstable'), (500, 'stable'), (5, 'testing'), (1, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 2.6.39-2-amd64 (SMP w/2 CPU cores) Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages mplayer depends on: ii liba52 0.7.4-14 library for decoding ATSC A/52 str ii libaa1 1.4p5-38 ascii art library ii libaso 1.0.23-2.1 shared library for ALSA applicatio ii libatk 1.30.0-1 The ATK accessibility toolkit ii libaud 1.9.2-4 Network Audio System - shared libr ii libbs2 3.1.0-0.2 Bauer stereophonic-to-binaural DSP ii libbz2 1.0.5-6 high-quality block-sorting file co ii libc6 2.11.2-10 Embedded GNU C Library: Shared lib ii libcac 0.99.beta17-1 colour ASCII art library ii libcai 1.8.10-6 The Cairo 2D vector graphics libra ii libcdp 3.10.2+debian-9 audio extraction tool for sampling ii libdca 0.0.5-3 decoding library for DTS Coherent ii libdir 1.0.2-3 open and royalty free high quality ii libdir 1.0.2-3 open and royalty free high quality ii libdir 1.2.10.0-4 direct frame buffer graphics - sha ii libdv4 1.0.0-2.1 software library for DV format dig ii libenc 1.13-3 Extremely Naive Charset Analyser - ii libfaa 1.28-0.3 an AAC audio encoder - library fil ii libfaa 2.7-6 freeware Advanced Audio Decoder - ii libfon 2.8.0-2.1 generic font configuration library ii libfre 2.4.2-2.1 FreeType 2 font engine, shared lib ii libfri 0.19.2-1 Free Implementation of the Unicode ii libgcc 1:4.4.5-8 GCC support library ii libgdk 2.23.5-1 GDK Pixbuf library ii libggi 1:2.2.2-5 General Graphics Interface runtime ii libggi 0.3.2-2 GGI Window Manager Hints extension ii libgif 4.1.6-9 library for GIF images (library) ii libgl1 7.7.1-4 A free implementation of the OpenG ii libgli 2.28.6-1 The GLib library of C routines ii libgtk 2.24.5-2 GTK+ graphical user interface libr ii libjac 1:0.118+svn3796-7 JACK Audio Connection Kit (librari ii libjpe 8c-2 Independent JPEG Group's JPEG runt ii liblir 0.8.3-5 infra-red remote control support - ii liblzo 2.03-2 data compression library ii libmad 0.15.1b-5 MPEG audio decoder library ii libmng 1.0.10-1+b1 Multiple-image Network Graphics li ii libmp3 1:3.98.4-0.2 LAME Ain't an MP3 Encoder (shared ii libncu 5.7+20100313-5 shared libraries for terminal hand ii libogg 1.2.0~dfsg-1 Ogg bitstream library ii libope 0.1.2-1 Adaptive Multi Rate speech codec - ii libope 0.1.2-1 Adaptive Multi-Rate - Wideband spe ii libope 1.3+dfsg-4 JPEG 2000 image compression/decomp ii libpan 1.28.3-1+squeeze2 Layout and rendering of internatio ii libpng 1.2.44-1+squeeze1 PNG library - runtime ii libpul 0.9.21-3+squeeze1 PulseAudio client libraries ii librtm 2.3-2 toolkit for RTMP streams (shared l ii libsch 1.0.9-2 library for encoding/decoding of D ii libsdl 1.2.14-6.1 Simple DirectMedia Layer ii libsmb 2:3.5.6~dfsg-3squeeze5 shared library for communication w ii libspe 1.2~rc1-1 The Speex codec runtime library ii libstd 4.6.0-2 The GNU Standard C++ Library v3 ii libsvg 1:1.4.3-29 console SVGA display libraries ii libthe 1.1.1+dfsg.1-3 The Theora Video Compression Codec ii libvdp 0.4.1-2 Video Decode and Presentation API ii libvor 1.3.1-1 The Vorbis General Audio Compressi ii libvor 1.3.1-1 The Vorbis General Audio Compressi ii libvpx 0.9.1-2 VP8 video codec (shared library) ii libx11 2:1.3.3-4 X11 client-side library ii libx26 2:0.116.2037+gitf8ebd4a-3~bpo60+1 x264 video coding library ii libxex 2:1.1.2-1 X11 miscellaneous extension librar ii libxin 2:1.1-3 X11 Xinerama extension library ii libxss 1:1.2.0-2 X11 Screen Saver extension library ii libxt6 1:1.0.7-1 X11 toolkit intrinsics library ii libxv1 2:1.0.5-1 X11 Video extension library ii libxvi 2:1.2.2-0.1 High quality ISO MPEG4 codec libra ii libxvm 2:1.0.5-1 X11 Video extension library ii libxxf 2:1.1.1-2 X11 Direct Graphics Access extensi ii libxxf 1:1.1.0-2 X11 XFree86 video mode extension l ii mplaye 1.6-2 blue skin for mplayer ii zlib1g 1:1.2.3.4.dfsg-3 compression library - runtime mplayer recommends no packages. Versions of packages mplayer suggests: pn jackd <none> (no description available) ii libdvdcss2 [libdvdcss] 1.2.10-0.3 Simple foundation for reading DVDs pn mplayer-doc <none> (no description available) ii nvidia-vdpau-driver 275.09.07-5 NVIDIA vdpau driver pn pulseaudio <none> (no description available) -- no debconf information
--- End Message ---
--- Begin Message ---On Sun, 4 Mar 2012, Reimar Döffinger wrote: > Old issue and not that much new to add, but still... > > On Sat, Aug 13, 2011 at 08:50:11PM +1000, Tim Connors wrote: > > On Sat, 13 Aug 2011, Reimar Döffinger wrote: > > > Behaviour is to make keyboard control of MPlayer more reliable mostly I > > > expect. > > > I think the MPlayer documentation says you must use -noconsolecontrols > > > when using MPlayer without a terminal (in particular from cron jobs). > > > > The description in the manpage doens't cover this case (stdin being > > /dev/null rather than a command file or the file being played). > > > > And it makes matters worse. CPU usage is still 100%, but I can't see why. > > strace -f doesn't show it busy looping on file descriptor 0 - it's just > > reading the input file and sending stuff to X11. > > Using latest SVN MPlayer: > mplayer http://80.237.155.73:80 -dumpaudio -noconsolecontrols > results in low CPU usage. > As does > mplayer http://80.237.155.73:80 -dumpaudio -nocache > (giving specific examples, because the issue will _not_ be > reproducible at all when dumping from a source that can > be read faster than MPlayer can dump - which is why > I never saw the issue when trying with a local file). Haha! I seem to have forgotten about this bug. Well, indeed, it does seem to be working in wheezy with flags like the above. Probably time to close this bug... -- Tim Connors
--- End Message ---
_______________________________________________ pkg-multimedia-maintainers mailing list pkg-multimedia-maintainers@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-multimedia-maintainers
