[FFmpeg-user] Why are there many buffers queued in output stream

[Volker Bradley]

Am a new ffmpeg user in MSWindows 7.  Window running in VMWare.
I am presently using the following command which seems to work well in spite
of some error messages that I don't understand:
ffmpeg -y -probesize 100000000 -rtbufsize 1000M -f dshow -r 10000/1001 -i
video="screen-capture-recorder":audio="Headset Microphone (Plantronics" -r
30 -threads 0 test.mkv

When using the above command, I see the following output:
ffmpeg version N-58338-gfb7d70c Copyright (c) 2000-2013 the FFmpeg
developers
  built on Nov 21 2013 20:08:44 with gcc 4.8.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --e
nable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enable-iconv --enable-li
bass --enable-libbluray --enable-libcaca --enable-libfreetype
--enable-libgsm --enable-lib
ilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
--enable-libopenco
re-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp
--enable-libschroedinger -
-enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame
--enable-libvidst
ab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
--enable-libvpx --enab
le-libwavpack --enable-libx264 --enable-libxavs --enable-libxvid
--enable-zlib
  libavutil      52. 53.100 / 52. 53.100
  libavcodec     55. 44.100 / 55. 44.100
  libavformat    55. 21.100 / 55. 21.100
  libavdevice    55.  5.100 / 55.  5.100
  libavfilter     3. 91.100 /  3. 91.100
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
Guessed Channel Layout for  Input Stream #0.1 : stereo
Input #0, dshow, from 'video=screen-capture-recorder:audio=Headset
Microphone (Plantronics
':
  Duration: N/A, start: 79.475000, bitrate: 1411 kb/s
    Stream #0:0: Video: rawvideo, bgra, 1920x1080, 9.99 tbr, 10000k tbn,
9.99 tbc
    Stream #0:1: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
No pixel format specified, yuv444p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 00000000003876c0] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2
[libx264 @ 00000000003876c0] profile High 4:4:4 Predictive, level 4.0, 4:4:4
8-bit
[libx264 @ 00000000003876c0] 264 - core 140 r2377 1ca7bb9 - H.264/MPEG-4 AVC
codec - Copyl
eft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3
deblock=1:0:0 a
nalyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1
me_range=16 chroma_me=1
 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4
threads=6 lookahe
ad_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0
constrained_int
ra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0
weightp=2 keyi
nt=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf
mbtree=1 crf=23.0
qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, matroska, to 'test.mkv':
  Metadata:
    encoder         : Lavf55.21.100
    Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv444p,
1920x1080, q=-1--1, 1
k tbn, 30 tbc
    Stream #0:1: Audio: vorbis (libvorbis) (oV[0][0] / 0x566F), 44100 Hz,
stereo, fltp
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo -> libx264)
  Stream #0:1 -> #0:1 (pcm_s16le -> libvorbis)
Press [q] to stop, [?] for help
[output stream 0:1 @ 000000000039d100] *100 buffers queued in output stream
0:1, something
may be wrong.*
frame=   19 fps=4.9 q=-1.0 Lsize=     740kB time=00:00:02.98
bitrate=2028.6kbits/s
video:706kB audio:29kB subtitle:0 global headers:4kB muxing overhead
0.222285%
[libx264 @ 00000000003876c0] frame I:1     Avg QP:16.82  size:628194
[libx264 @ 00000000003876c0] frame P:5     Avg QP:18.48  size: 16740
[libx264 @ 00000000003876c0] frame B:13    Avg QP:19.47  size:   778
[libx264 @ 00000000003876c0] consecutive B-frames:  5.3% 10.5%  0.0% 84.2%
[libx264 @ 00000000003876c0] mb I  I16..4: 10.8% 39.5% 49.7%
[libx264 @ 00000000003876c0] mb P  I16..4:  0.0%  0.1%  1.5%  P16..4:  4.1% 
0.4%  0.4%  0
.0%  0.0%    skip:93.4%
[libx264 @ 00000000003876c0] mb B  I16..4:  0.0%  0.0%  0.1%  B16..8:  2.1% 
0.0%  0.0%  d
irect: 0.0%  skip:97.7%  L0:34.6% L1:65.3% BI: 0.1%
[libx264 @ 00000000003876c0] 8x8 transform intra:36.9% inter:62.6%
[libx264 @ 00000000003876c0] coded y,u,v intra: 84.1% 60.3% 60.9% inter:
0.2% 0.2% 0.1%
[libx264 @ 00000000003876c0] i16 v,h,dc,p:  7% 23% 55% 14%
[libx264 @ 00000000003876c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 26% 24%  4% 
5%  4%  8%  4
%  8%
[libx264 @ 00000000003876c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 23% 14%  5% 
8%  7% 12%  5
%  7%
[libx264 @ 00000000003876c0] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 00000000003876c0] ref P L0: 79.3%  2.1% 12.4%  6.2%
[libx264 @ 00000000003876c0] ref B L0: 79.6% 18.3%  2.1%
[libx264 @ 00000000003876c0] ref B L1: 94.7%  5.3%
[libx264 @ 00000000003876c0] kb/s:3040.04

What should I do to remove this message?




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