I guess this is hardware independent? (i.e. you have tried on few
boxes/laptops with the same success)
have you asked PsychoPy guys themselves?
O mighty Mario, would you happen to have ideas where to look at?
On Fri, 29 Nov 2013, Michael Hanke wrote:
> Package: psychopy
> Version: 1.77.02.dfsg-1
> Severity: normal
> Hi,
> using movie stimuli in Psychopy doesn't really work smoothly. Whenever a
> movie with sound is played I experience dropped frames. I am attaching a
> little benchmark that can be used to show this (done in the builder,
> just select a movie file and run it). This issue is only present when
> sound is actually played. When it is not played, even when a sound
> stream is present in the file and avbin just 'ignores' it, the stimulus
> is smooth.
> All files and codec combinations I tested play smooth in avplay, vlc,
> mplayer and others. I see this issue on amd64 and i386 -- independent of
> whether Psychopys own system check reports 'dropped frames' on a
> particular system or not. I tested Debian Jessie and Ubuntu 13.04, both
> show the problem.
> Psychopy upstream recommends avbin 5 for movie stimuli, but Debian never
> had it (according to snapshots.d.o). Psychopy upstream also recommend
> uncompressed PCM audio -- that makes no difference in comparison to,
> e.g. FLAC.
> Interestingly, I see a similar jerky playback in openshot. However, when
> using the MELT player (from the framework that openshot is based on)
> everything is smooth.
> This is also not an obvious IO issue. Even if I cache the entire movie
> file in memory, the frame drops are still present. System load at
> playback is negligible.
> Any advise would be very much appreciated.
> Thanks,
> Michael
> -- System Information:
> Debian Release: jessie/sid
> APT prefers testing
> APT policy: (650, 'testing'), (600, 'unstable')
> Architecture: amd64 (x86_64)
> Foreign Architectures: i386
> Kernel: Linux 3.10-3-amd64 (SMP w/4 CPU cores)
> Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
> Versions of packages psychopy depends on:
> ii python 2.7.5-5
> ii python-configobj 4.7.2+ds-5
> ii python-lxml 3.2.0-1+b1
> ii python-matplotlib 1.1.1~rc2-1
> ii python-numpy 1:1.7.1-3
> ii python-opengl 3.0.1-1
> ii python-pygame 1.9.1release+dfsg-8
> ii python-pyglet 1.1.4.dfsg-2
> ii python-scipy 0.12.0-2+b1
> ii python-support 1.0.15
> Versions of packages psychopy recommends:
> ii ipython 0.13.2-2
> ii libavbin0 7-1.4
> ii libxxf86vm1 1:1.1.3-1
> ii python-imaging 1.1.7-4
> ii python-openpyxl 1.5.8-1
> ii python-pygame 1.9.1release+dfsg-8
> ii python-pyglet 1.1.4.dfsg-2
> ii python-pyo 0.6.8-1
> ii python-serial 2.6-1
> ii python-wxgtk2.8 2.8.12.1+dfsg-1
> Versions of packages psychopy suggests:
> pn python-iolabs <none>
> pn python-pyxid <none>
> -- debconf-show failed
> <PsychoPy2experiment version="1.77.01" encoding="utf-8">
> <Settings>
> <Param name="Show mouse" val="False" valType="bool" updates="None"/>
> <Param name="Save csv file" val="False" valType="bool" updates="None"/>
> <Param name="Monitor" val="testMonitor" valType="str" updates="None"/>
> <Param name="Enable Escape" val="True" valType="bool" updates="None"/>
> <Param name="color" val="$[0,0,0]" valType="str" updates="None"/>
> <Param name="Window size (pixels)" val="[1024, 768]" valType="code"
> updates="None"/>
> <Param name="Full-screen window" val="False" valType="bool"
> updates="None"/>
> <Param name="colorSpace" val="rgb" valType="str" updates="None"/>
> <Param name="Save log file" val="True" valType="bool" updates="None"/>
> <Param name="Experiment info" val="{u'session': u'001', u'participant':
> u''}" valType="code" updates="None"/>
> <Param name="Save excel file" val="False" valType="bool" updates="None"/>
> <Param name="Save wide csv file" val="True" valType="bool"
> updates="None"/>
> <Param name="Save psydat file" val="True" valType="bool" updates="None"/>
> <Param name="expName" val="movie_benchmark" valType="str" updates="None"/>
> <Param name="logging level" val="exp" valType="code" updates="None"/>
> <Param name="Units" val="use prefs" valType="str" updates="None"/>
> <Param name="Show info dlg" val="True" valType="bool" updates="None"/>
> <Param name="Saved data folder" val="" valType="code" updates="None"/>
> <Param name="Screen" val="1" valType="num" updates="None"/>
> </Settings>
> <Routines>
> <Routine name="movie_routine">
> <MovieComponent name="movie_clip">
> <Param name="opacity" val="1" valType="code" updates="constant"/>
> <Param name="name" val="movie_clip" valType="code"
> updates="constant"/>
> <Param name="movie" val="fg_av_test.mov" valType="str"
> updates="constant"/>
> <Param name="stopVal" val="10" valType="code" updates="constant"/>
> <Param name="durationEstim" val="" valType="code" updates="None"/>
> <Param name="pos" val="[0, 0]" valType="code" updates="constant"/>
> <Param name="forceEndRoutine" val="False" valType="bool"
> updates="constant"/>
> <Param name="startEstim" val="" valType="code" updates="None"/>
> <Param name="units" val="from exp settings" valType="str"
> updates="None"/>
> <Param name="startType" val="time (s)" valType="str" updates="None"/>
> <Param name="ori" val="0" valType="code" updates="constant"/>
> <Param name="stopType" val="duration (s)" valType="str"
> updates="None"/>
> <Param name="startVal" val="0.0" valType="code" updates="None"/>
> <Param name="size" val="" valType="code" updates="constant"/>
> </MovieComponent>
> <CodeComponent name="code">
> <Param name="Begin Experiment" val="from datetime import
> datetime import numpy as np" valType="code" updates="constant"/>
> <Param name="name" val="code" valType="code" updates="None"/>
> <Param name="Each Frame" val="cur_movietime =
> movie_clip._movie._last_video_timestamp if last_movietime and
> cur_movietime > last_movietime: n_movieframes += 1 incr =
> cur_movietime - last_movietime
> movie_frame_increments.append(incr) movie_lags.append(cur_movietime -
> t) if lastframe_time: realtime_frame_increments.append(t
> - lastframe_time) lastframe_time = t last_movietime =
> cur_movietime" valType="code" updates="constant"/>
> <Param name="Begin Routine" val="n_movieframes = 0 last_movietime
> = None lastframe_time = None movie_frame_increments =
> [] realtime_frame_increments = [] movie_lags = []" valType="code"
> updates="constant"/>
> <Param name="End Routine" val="" valType="code" updates="constant"/>
> <Param name="End Experiment" val="import pylab as
> pl pl.subplot(1,2,1) pl.hist(realtime_frame_increments,
> bins=100) pl.title('Distance of two movie frames in real
> time') pl.xlabel('Time in
> secs') pl.subplot(1,2,2) pl.hist(movie_lags,
> bins=100) pl.title('Lag between movie time and real time for all
> frames') pl.xlabel('Time in seconds') print "Movie frames
> played:", n_movieframes print 'Mean movie frame increment:',
> np.mean(movie_frame_increments), 's (', 1./np.mean(movie_frame_increments),
> 'fps )' print 'Unique movie frame increments',
> np.unique(movie_frame_increments) pl.show()" valType="code"
> updates="constant"/>
> </CodeComponent>
> </Routine>
> </Routines>
> <Flow>
> <Routine name="movie_routine"/>
> </Flow>
> </PsychoPy2experiment>
--
Yaroslav O. Halchenko, Ph.D.
http://neuro.debian.net http://www.pymvpa.org http://www.fail2ban.org
Senior Research Associate, Psychological and Brain Sciences Dept.
Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
Phone: +1 (603) 646-9834 Fax: +1 (603) 646-1419
WWW: http://www.linkedin.com/in/yarik
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