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• ffmpeg mp4 x264 encoding -> playback causes "pending" in both Chrome and IE causing 10+ seconds delay

  26 novembre 2015, par user1978645

  After encoding a video to mp4(x264 with aac) ; I have the following weird behaviour in both crome and IE :

  Im serving the content from https with spdy enables.

  It takes up to 30 seconds before the video is actually played, in the mean time i cannot reload the page it shows up as "pending". (even after i have visual on the video sometimes it takes 10-20 seconds before i can actually reload the page, or navigate to another url on the same domain)

  After looking at the "network" tab in developer tools, i see the following requests for 1 page/video :

  Path        Method Status   Type         Initiator   Size/content  Time/latency
  
  video.mp4   GET    206 OK   video/mp4    other       32.3KB/32.0kb  600ms/339MS 
  
  video.mp4   GET    206 OK   video/mp4    other       123kb/123b     21.85s/21.46s
  
  video.mp4   GET    206 OK   video/mp4    other       7.1MB/7.2MB    1.4min/2ms

  I tried to isolate the problem, When i use an mp4 video from the internet (for example the demo video of jplayer) and load it from my server, it loads rapidly, without delays.

  So it makes me think the problem lies within the encoding. I tried various things.
  FFmpeg :

  • csr 69 (low quality)

  • various options

  HTML :

  • preload="none"

  • javascript loading/playing of the movie

  • type=’mp4/video’

  • no posterimage

  But i cannot resolve the problem. Does anyone have a clue what is causing this ?

  I have a download speed of 300kb/s and the movie is 6MB.

  After the video starts, the video isn’t fully buffered, so i wonder : What is the html5 videoplayer doing all this time ?

  The problem also blocks the connections. When i press "F5" in both chrome and IE the page beeing reloaded comes up in the network tab as "pending" and it can take 10 to 20 seconds before the page actually reloads.

  ffmpeg command : (i used various commands but this is just 1 example which causes the problem)

  /root/bin/ffmpeg    -threads 1 -y  -i /home/flirtzo/public_html//userfiles/files/94e76a18a7838e62ecb23cf0c374b1b798e7b936  -threads 0 -codec:a libfdk_aac -b:a 128k  -vf "scale=-2:320" -preset veryslow -vcodec h264 -acodec aac -strict -2  /home/flirtzo/public_html/userfiles/files/b2/72/695f4eba95169a3f29564bf9571c703b05f1b5974f5156da633eb139c80a1575452e2858dfc61cc82bfca02d2b156aa64d4503695756481dc2a5d1c673a4cdea-94e76a18a7838e62ecb23cf0c374b1b798e7b936.mp4

  Output :

  ffmpeg version git-2014-04-16-c150e2c Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Sep 28 2014 21:08:17 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)
  
    configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-        ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --extra-libs=-ldl --enable-gpl --enable-nonfree -    -enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-    libx264
  
    libavutil      52. 76.100 / 52. 76.100
  
    libavcodec     55. 58.103 / 55. 58.103
  
    libavformat    55. 37.100 / 55. 37.100
  
    libavdevice    55. 13.100 / 55. 13.100
  
    libavfilter     4.  4.100 /  4.  4.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mpeg, from         '/home/flirtzo/public_html//userfiles/files/94e76a18a7838e62ecb23cf0c374b1b798e7b936':
  
    Duration: 00:00:25.97, start: 0.340078, bitrate: 29004 kb/s
  
      Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p(tv), 352x240 [SAR 200:219 DAR 880:657], 1150     kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 29.97 tbc
  
      Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, stereo, s16p, 224 kb/s
  
  [libx264 @ 0x2b189c0] using SAR=1199/1314
  
  [libx264 @ 0x2b189c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x2b189c0] profile High, level 1.3
  
  [libx264 @ 0x2b189c0] 264 - core 142 r2 d6b4e63 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 -     http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex     subme=4 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0     deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=1 sliced_threads=0 nr=0     decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0     direct=1 weightb=1 open_gop=0 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0     rc_lookahead=20 rc=crf mbtree=1 crf=51.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to     '/home/flirtzo/public_html/userfiles/files/b2/72/695f4eba95169a3f29564bf9571c703b05f1b5974f5156da633e    b139c80a1575452e2858dfc61cc82bfca02d2b156aa64d4503695756481dc2a5d1c673a4cdea-    94e76a18a7838e62ecb23cf0c374b1b798e7b936.mp4':
  
    Metadata:
  
      encoder         : Lavf55.37.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 320x218 [SAR 1199:1314        DAR 880:657], q=-1--1, 30k tbn, 29.97 tbc
  
      Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg1video -> libx264)
  
    Stream #0:1 -> #0:1 (mp2 -> aac)
  
  Press [q] to stop, [?] for help
  
  frame=16127 fps=786 q=-1.0 Lsize=   10559kB time=00:08:58.12 bitrate= 160.7kbits/s dup=12 drop=0
  
  video:1586kB audio:8410kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead:     5.638589%
  
  [libx264 @ 0x2b189c0] frame I:109   Avg QP:50.58  size:   494
  
  [libx264 @ 0x2b189c0] frame P:9537  Avg QP:51.00  size:   138
  
  [libx264 @ 0x2b189c0] frame B:6481  Avg QP:51.00  size:    40
  
  [libx264 @ 0x2b189c0] consecutive B-frames: 21.8% 72.1%  5.4%  0.7%
  
  [libx264 @ 0x2b189c0] mb I  I16..4: 46.1% 53.9%  0.0%
  
  [libx264 @ 0x2b189c0] mb P  I16..4:  6.0%  6.1%  0.0%  P16..4: 12.7%  1.1%  0.1%  0.0%  0.0%        skip:74.1%
  
  [libx264 @ 0x2b189c0] mb B  I16..4:  0.1%  0.1%  0.0%  B16..8:  6.3%  0.0%  0.0%  direct: 0.7%      skip:92.9%  L0:38.6% L1:61.2% BI: 0.2%
  
  [libx264 @ 0x2b189c0] 8x8 transform intra:50.8% inter:85.6%
  
  [libx264 @ 0x2b189c0] coded y,uvDC,uvAC intra: 5.9% 39.5% 0.1% inter: 0.1% 1.0% 0.0%
  
  [libx264 @ 0x2b189c0] i16 v,h,dc,p: 56% 30%  7%  7%
  
  [libx264 @ 0x2b189c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 11% 62%  3%  3%  3%  3%  2%  2%
  
  [libx264 @ 0x2b189c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19%  5% 73%  2%  0%  0%  0%  0%  2%
  
  [libx264 @ 0x2b189c0] i8c dc,h,v,p: 97%  1%  2%  0%
  
  [libx264 @ 0x2b189c0] Weighted P-Frames: Y:5.5% UV:2.7%
  
  [libx264 @ 0x2b189c0] ref P L0: 64.8% 35.2%
  
  [libx264 @ 0x2b189c0] ref B L0: 75.2% 24.8%
  
  [libx264 @ 0x2b189c0] ref B L1: 99.3%  0.7%
  
  [libx264 @ 0x2b189c0] kb/s:24.13
  
  ffmpeg version git-2014-04-16-c150e2c Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Sep 28 2014 21:08:17 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)
  
    configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-    ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --extra-libs=-ldl --enable-gpl --enable-nonfree -    -enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-    libx264
  
    libavutil      52. 76.100 / 52. 76.100
  
    libavcodec     55. 58.103 / 55. 58.103
  
    libavformat    55. 37.100 / 55. 37.100
  
    libavdevice    55. 13.100 / 55. 13.100
  
    libavfilter     4.  4.100 /  4.  4.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mpeg, from     '/home/flirtzo/public_html//userfiles/files/94e76a18a7838e62ecb23cf0c374b1b798e7b936':
  
    Duration: 00:00:25.97, start: 0.340078, bitrate: 29004 kb/s
  
      Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p(tv), 352x240 [SAR 200:219 DAR 880:657], 1150         kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 29.97 tbc
  
      Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, stereo, s16p, 224 kb/s
  
  [libx264 @ 0x300d9c0] using SAR=200/219
  
  [libx264 @ 0x300d9c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x300d9c0] profile High, level 2.2
  
  [libx264 @ 0x300d9c0] 264 - core 142 r2 d6b4e63 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 -                     http://www.videolan.org/x264.html - options: cabac=1 ref=16 deblock=1:0:0 analyse=0x3:0x133 me=umh         subme=10 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=24 chroma_me=1 trellis=2 8x8dct=1 cqm=0     deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=1 sliced_threads=0 nr=0     decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=8 b_pyramid=2 b_adapt=2 b_bias=0     direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0     rc_lookahead=60 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, mp4, to     '/home/flirtzo/public_html/userfiles/files/b2/72/73d4a3245c0b0e174ab7ce0f872ba3f649f8b93f73a6deeab364    4a994009d73638ce61aecc7dc2e0250c4e74ff2d9a4d479ed35cef26b3f6e1a77e8bf5938518-    94e76a18a7838e62ecb23cf0c374b1b798e7b936.mp4':
  
    Metadata:
  
      encoder         : Lavf55.37.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 352x240 [SAR 200:219     DAR 880:657], q=-1--1, 30k tbn, 29.97 tbc
  
      Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg1video -> libx264)
  
    Stream #0:1 -> #0:1 (mp2 -> aac)
  
     Press [q] to stop, [?] for help
  
  frame=16127 fps= 88 q=-1.0 Lsize=   29190kB time=00:08:58.12 bitrate= 444.4kbits/s dup=12 drop=0
  
  video:20221kB audio:8410kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead:     1.954086%
  
  [libx264 @ 0x300d9c0] frame I:73    Avg QP:24.31  size:  8024
  
  [libx264 @ 0x300d9c0] frame P:4399  Avg QP:26.97  size:  2600
  
  [libx264 @ 0x300d9c0] frame B:11655 Avg QP:32.51  size:   745
  
  [libx264 @ 0x300d9c0] consecutive B-frames:  3.8%  5.0% 27.2% 18.4%  8.4% 33.9%  1.7%  0.7%  0.9%
  
  [libx264 @ 0x300d9c0] mb I  I16..4: 10.8% 68.5% 20.7%
  
  [libx264 @ 0x300d9c0] mb P  I16..4:  2.9%  7.5%  0.8%  P16..4: 45.1% 18.4% 12.4%  0.5%  0.1%        skip:12.3%
  
  [libx264 @ 0x300d9c0] mb B  I16..4:  0.6%  1.3%  0.1%  B16..8: 40.1%  8.7%  1.7%  direct: 2.1%      skip:45.5%  L0:47.2% L1:41.7% BI:11.1%
  
  [libx264 @ 0x300d9c0] 8x8 transform intra:66.7% inter:76.7%
  
  [libx264 @ 0x300d9c0] direct mvs  spatial:99.9% temporal:0.1%
  
  [libx264 @ 0x300d9c0] coded y,uvDC,uvAC intra: 60.3% 75.8% 16.4% inter: 17.3% 16.8% 0.6%
  
  [libx264 @ 0x300d9c0] i16 v,h,dc,p: 16% 27% 11% 47%
  
  [libx264 @ 0x300d9c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 13% 18%  6%  9%  9% 11%  9% 11%
  
  [libx264 @ 0x300d9c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 15%  7%  7% 14% 14% 13%  8% 10%
  
  [libx264 @ 0x300d9c0] i8c dc,h,v,p: 26% 32% 20% 22%
  
  [libx264 @ 0x300d9c0] Weighted P-Frames: Y:10.1% UV:6.9%
  
  [libx264 @ 0x300d9c0] ref P L0: 40.6% 12.1% 10.0%  5.2%  5.2%  4.7%  4.6%  3.0%  2.5%  2.1%  1.9%      1.8%  1.7%  1.7%  1.6%  1.3%
  
  [libx264 @ 0x300d9c0] ref B L0: 71.4%  5.6%  3.2%  3.0%  3.1%  2.8%  2.5%  1.8%  1.3%  1.0%  1.1%      1.2%  1.0%  0.7%  0.5%
  
  [libx264 @ 0x300d9c0] ref B L1: 96.3%  3.7%
  
  [libx264 @ 0x300d9c0] kb/s:307.82

• opencv cmake didn't find lastest ffmpeg libs

  20 janvier 2014, par Eric

  Here the output of the ffmpeg command :

  ffmpeg version git-2014-01-20-4014b40 Copyright (c) 2000-2014 the FFmpeg developers
  
  built on Jan 20 2014 14:18:13 with gcc 4.8 (Ubuntu/Linaro 4.8.1-10ubuntu9)
  
  configuration: --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --    enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --  enable-libx264 --enable-nonfree --enable-x11grab
  
  libavutil      52. 63.100 / 52. 63.100
  
  libavcodec     55. 48.101 / 55. 48.101
  
  libavformat    55. 25.100 / 55. 25.100
  
  libavdevice    55.  5.102 / 55.  5.102
  
  libavfilter     4.  1.100 /  4.  1.100
  
  libswscale      2.  5.101 /  2.  5.101
  
  libswresample   0. 17.104 /  0. 17.104
  
  libpostproc    52.  3.100 / 52.  3.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  When running CmakeLists.txt for Opencv 2.4.8 installation :

  cmake -DCMAKE_BUILD_TYPE=RELEASE -DCMAKE_INSTALL_PREFIX=/usr/local -DBUILD_NEW_PYTHON_SUPPORT=ON -DWITH_TBB=ON -DWITH_V4L=ON -DWITH_QT=ON -DWITH_OPENGL=ON -DWITH_EIGEN=ON -DWITH_OPENEXR=ON ..

  I get :

  --   Video I/O:
  
  --     DC1394 1.x:                  NO
  
  --     DC1394 2.x:                  YES (ver 2.2.1)
  
  --     FFMPEG:                      YES
  
  --       codec:                     YES (ver 53.35.0)
  
  --       format:                    YES (ver 53.21.1)
  
  --       util:                      YES (ver 51.22.1)
  
  --       swscale:                   YES (ver 2.1.0)
  
  --       gentoo-style:              YES
  
  --     GStreamer:                   
  
  --       base:                      YES (ver 0.10.36)
  
  --       app:                       YES (ver 0.10.36)
  
  --       video:                     YES (ver 0.10.36)

  My question : Why opencv didn't link with the lastest libavutil, libavcodec, etc ...

• Speed up start of a stream recording with ffmpeg

  15 janvier 2014, par neutron

  I try to record a video stream (from the web or a local webcam stream) and save it to a .mp4 / .flv file. I use FFmpeg with the version"N-59696-gc0a33c4".

  The problem isn't the recording of the stream, it is, how log it tooks to start the recording.

  This are the parameters i used to capture the stream (the stream is some random stream I found on the web) :

  ffmpeg.exe -i mmsh://live.camstreams.com/cscamscape?MSWMExt=.asf -r 25 -t 60 C:\temp\video.mp4

  And leads to this output :

  ffmpeg.exe -i mmsh://live.camstreams.com/cscams
  
  cape?MSWMExt=.asf -r 25 -t 60 C:\temp\video.mp4
  
  ffmpeg version N-59696-gc0a33c4 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Jan  8 2014 22:01:50 with gcc 4.8.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
  
  cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
  
  ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 62.100 / 52. 62.100
  
    libavcodec     55. 47.100 / 55. 47.100
  
    libavformat    55. 22.102 / 55. 22.102
  
    libavdevice    55.  5.102 / 55.  5.102
  
    libavfilter     4.  0.103 /  4.  0.103
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  [wmv3 @ 0275db40] Extra data: 8 bits left, value: 0
  
  Input #0, asf, from 'mmsh://live.camstreams.com/cscamscape?MSWMExt=.asf':
  
    Metadata:
  
      title           : Live Fish Cam
  
      WMFSDKNeeded    : 0.0.0.0000
  
      DeviceConformanceTemplate: SP
  
      WMFSDKVersion   : 11.0.5721.5275
  
      IsVBR           : 0
  
    Duration: N/A, start: 3887858.274000, bitrate: 512 kb/s
  
      Stream #0:0(eng): Video: wmv3 (Simple) (WMV3 / 0x33564D57), yuv420p, 640x360
  
  , 512 kb/s, 62.50 tbr, 1k tbn, 1k tbc
  
  [libx264 @ 0275e400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0275e400] profile High, level 3.0
  
  [libx264 @ 0275e400] 264 - core 140 r2377 1ca7bb9 - H.264/MPEG-4 AVC codec - Cop
  
  yleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deb
  
  lock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 m
  
  e_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chro
  
  ma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1
  
  interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
  
   b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scene
  
  cut=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
  
  [wmv3 @ 0275db40] Extra data: 8 bits left, value: 0
  
  Output #0, mp4, to 'C:\temp\video.mp4':
  
    Metadata:
  
      title           : Live Fish Cam
  
      WMFSDKNeeded    : 0.0.0.0000
  
      DeviceConformanceTemplate: SP
  
      WMFSDKVersion   : 11.0.5721.5275
  
      IsVBR           : 0
  
      encoder         : Lavf55.22.102
  
      Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 6
  
  40x360, q=-1--1, 12800 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (wmv3 -> libx264)
  
  Press [q] to stop, [?] for help
  
  frame=  148 fps=0.0 q=28.0 size=     228kB time=00:00:03.60 bitrate= 518.3kbits/
  
  frame=  151 fps=117 q=28.0 size=     236kB time=00:00:03.72 bitrate= 519.2kbits/
  
  frame=  178 fps= 91 q=28.0 size=     298kB time=00:00:04.80 bitrate= 508.3kbits/
  
  frame=  204 fps= 64 q=28.0 size=     347kB time=00:00:05.84 bitrate= 487.4kbits/
  
  ... 
  
  ... And so on ...

  The problem now is, that it takes around 6-10 seconds until the recording starts after I entered the command.

  Is there a way to speed up this process ?