id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc	blockedby	blocking	reproduced	analyzed
2053	ffplay's frame step not accurate	ubitux	cus	"Frame stepping in ffplay doesn't work that well. It seems there is some kind of race. Start playing a relatively big video (with the drawtext filter as shown below to print the frame id), and switch to step-by-step mode ('s').

{{{
☭ ./ffplay ~/samples/big_buck_bunny_1080p_h264.mov -vf drawtext=text=%{n}:expansion=normal:fontcolor=yellow:fontsize=50:fontfile=LiberationMono                                                    
ffplay version N-48100-g3f72dbe Copyright (c) 2003-2012 the FFmpeg developers
  built on Dec 22 2012 12:54:34 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-fontconfig --enable-libfreetype --enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264 --enable-libvpx --enable-libtheora --enable-x11grab --enable-libopenjpeg --enable-libass --enable-libmodplug --enable-libv4l2 --cc=colorgcc --samples=/home/ubitux/fate-samples --prefix=/tmp/ffinstall --enable-runtime-cpudetect --enable-libcelt
  libavutil      52. 12.100 / 52. 12.100
  libavcodec     54. 81.100 / 54. 81.100
  libavformat    54. 49.102 / 54. 49.102
  libavdevice    54.  3.102 / 54.  3.102
  libavfilter     3. 29.100 /  3. 29.100
  libswscale      2.  1.103 /  2.  1.103
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/ubitux/samples/big_buck_bunny_1080p_h264.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2008-05-27 18:40:35
    timecode        : 00:00:00:00
  Duration: 00:09:56.46, start: 0.000000, bitrate: 9725 kb/s
    Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080, 9282 kb/s, 24 fps, 24 tbr, 2400 tbn, 4800 tbc
    Metadata:
      creation_time   : 2008-05-27 18:40:35
      handler_name    : Apple Alias Data Handler
    Stream #0:1(eng): Data: none (tmcd / 0x64636D74)
    Metadata:
      creation_time   : 2008-05-27 18:40:35
      handler_name    : Apple Alias Data Handler
      timecode        : 00:00:00:00
    Stream #0:2(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 437 kb/s
    Metadata:
      creation_time   : 2008-05-27 18:40:35
      handler_name    : Apple Alias Data Handler
Frame changed from size:0x0 to size:1920x108001KB sq=    0B f=0/0   
}}}

Now look at the counter; sometimes (1 out of 10-20 frames, not reproducible with the same frame id between different runs) the frame doesn't increment (and need one or two more key hits), or increment too quickly (often skip 1 frame)."	defect	closed	normal	FFplay	git-master	fixed	framestep				1	0