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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

• Streaming H.264 over UDP using FFmpeg, and "dimensions not set" error

  3 septembre 2015, par Baris Demiray

  I’m trying to stream H.264 over UDP with no luck so far. Here is a minimal code that you can reproduce the problem.

  To compile,

  g++ -o test -lavcodec -lavformat -lavutil test.cpp

  Extra information, I start ffplay as follows. Currently it’s of no use.

  ffplay -i udp://127.0.0.1:8554/live.sdp

  Output of my code (see avio_open() call),

  [libx264 @ 0x6a26c0] using mv_range_thread = 24
  
  [libx264 @ 0x6a26c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
  
  [libx264 @ 0x6a26c0] profile High, level 3.1
  
  Output #0, h264, to 'udp://127.0.0.1:8554/live.sdp':
  
      Stream #0:0, 0, 0/0: Video: h264 (libx264), -1 reference frame, none, q=-1--1
  
  [h264 @ 0x6a2020] dimensions not set
  
  Cannot write header to stream: Success

  And the code,

  extern "C" {
  
      #include <libavcodec></libavcodec>avcodec.h>
  
      #include <libavformat></libavformat>avformat.h>
  
      #include <libavutil></libavutil>avutil.h>
  
  }
  
  
  
  #include <iostream>
  
  using namespace std;
  
  
  
  int main() {
  
      AVCodecContext* m_codecContext;
  
      AVCodec* m_codec;
  
      AVFormatContext* m_formatContext;
  
      AVStream* m_stream;
  
  
  
      unsigned m_outWidth = 768;
  
      unsigned m_outHeight = 608;
  
  
  
      av_register_all();
  
      avcodec_register_all();
  
      avformat_network_init();
  
  
  
      int errorStatus = 0;
  
      char errorLog[128] = { 0 };
  
      av_log_set_level(AV_LOG_TRACE);
  
  
  
      string m_output("udp://127.0.0.1:8554/live.sdp");
  
  
  
      if (avformat_alloc_output_context2(&amp;m_formatContext, NULL, "h264", m_output.c_str()) &lt; 0) {
  
          cerr &lt;&lt; "Cannot allocate output context: "
  
               &lt;&lt; av_make_error_string(errorLog, 128, errorStatus) &lt;&lt; endl;
  
          return -1;
  
      }
  
  
  
      AVOutputFormat *m_outputFormat = m_formatContext->oformat;
  
  
  
      m_codec = avcodec_find_encoder(AV_CODEC_ID_H264);
  
      if (!m_codec) {
  
          cerr &lt;&lt; "Cannot find an encoder: "
  
               &lt;&lt; av_make_error_string(errorLog, 128, errorStatus) &lt;&lt; endl;
  
          return -1;
  
      }
  
  
  
      m_codecContext = avcodec_alloc_context3(m_codec);
  
      if (!m_codecContext) {
  
          cerr &lt;&lt; "Cannot allocate a codec context: "
  
               &lt;&lt; av_make_error_string(errorLog, 128, errorStatus) &lt;&lt; endl;
  
          return -1;
  
      }
  
  
  
      m_codecContext->pix_fmt = AV_PIX_FMT_YUV420P;
  
      m_codecContext->width = m_outWidth;
  
      m_codecContext->height = m_outHeight;
  
  
  
      if (avcodec_open2(m_codecContext, m_codec, NULL) &lt; 0) {
  
          cerr &lt;&lt; "Cannot open codec: "
  
               &lt;&lt; av_make_error_string(errorLog, 128, errorStatus) &lt;&lt; endl;
  
          return -1;
  
      }
  
  
  
      m_stream = avformat_new_stream(m_formatContext, m_codec);
  
      if (!m_stream) {
  
          cerr &lt;&lt; "Cannot create a new stream: "
  
               &lt;&lt; av_make_error_string(errorLog, 128, errorStatus) &lt;&lt; endl;
  
          return -1;
  
      }
  
  
  
      av_dump_format(m_formatContext, 0, m_output.c_str(), 1);
  
  
  
      if ((errorStatus = avio_open(&amp;m_formatContext->pb, m_output.c_str(), AVIO_FLAG_WRITE)) &lt; 0) {
  
          cerr &lt;&lt; "Cannot open output: "
  
               &lt;&lt; av_make_error_string(errorLog, 128, errorStatus) &lt;&lt; endl;
  
          return -1;
  
      }
  
  
  
      if (avformat_write_header(m_formatContext, NULL) &lt; 0) {
  
          cerr &lt;&lt; "Cannot write header to stream: "
  
               &lt;&lt; av_make_error_string(errorLog, 128, errorStatus) &lt;&lt; endl;
  
          return -1;
  
      }
  
  
  
      cout &lt;&lt; "All done." &lt;&lt; endl;
  
  
  
      return 0;
  
  }
  
  </iostream>

  For those who has even more time to spare on my problem, when I change m_output to rtsp://127.0.0.1:8554/live.sdp, and ffplay command to ffplay -rtsp_flags listen -i rtsp://127.0.0.1:8554/live.sdp I get the error,

  [libx264 @ 0x1e056c0] using mv_range_thread = 24
  
  [libx264 @ 0x1e056c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
  
  [libx264 @ 0x1e056c0] profile High, level 3.1
  
  Output #0, h264, to 'rtsp://127.0.0.1:8554/live.sdp':
  
      Stream #0:0, 0, 0/0: Video: h264 (libx264), -1 reference frame, none, q=-1--1
  
  Cannot open output: Protocol not found

  Am I naive to expect that streaming protocol will be changed like this ?

• How to deal with "Buffer queue overflow, dropping." (ffmpeg)

  1er mai 2015, par whitesiroi

  Sometimes it works great and sometimes I’m getting this message
  [Parsed_overlay_0 @ 0x7f9520518800] [framesync @ 0x7f9521021e28] Buffer queue overflow, dropping.

  by running this command
  ffmpeg -i a1.mp4 -i watermark150x125.png -filter_complex 'overlay=10:10' output.mp4

  I tried different variation of "overlay" like overlay=W-w-5:H-h-5, overlay=10:main_h-overlay_h-10, overlay=main_w-overlay_w-10:main_h-overlay_h-10 - getting the same result.

  Here is the output of the ffmpeg command.

  ffmpeg version 2.6.2 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.6.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
  
    libavutil      54. 20.100 / 54. 20.100
  
    libavcodec     56. 26.100 / 56. 26.100
  
    libavformat    56. 25.101 / 56. 25.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.102 /  5. 11.102
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f952101d200] stream 0, timescale not set
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'a1.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      artist          : a1
  
      album           :
  
      comment         : 
  
      date            : 0
  
      genre           :
  
      title           : a1
  
      encoder         : Lavf56.4.101
  
    Duration: 00:01:41.51, start: 0.000000, bitrate: 227 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 426x240 [SAR 1:1 DAR 71:40], 97 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
      Stream #0:2: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 120x90 [SAR 1:1 DAR 4:3], 90k tbr, 90k tbn, 90k tbc
  
  Input #1, png_pipe, from 'watermark150x125.png':
  
    Duration: N/A, bitrate: N/A
  
      Stream #1:0: Video: png, rgba, 150x125 [SAR 2835:2835 DAR 6:5], 25 tbr, 25 tbn, 25 tbc
  
  [swscaler @ 0x7f9521013e00] deprecated pixel format used, make sure you did set range correctly
  
  [libx264 @ 0x7f9521030e00] using SAR=1/1
  
  [libx264 @ 0x7f9521030e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x7f9521030e00] profile High, level 2.1
  
  [libx264 @ 0x7f9521030e00] 264 - core 144 r2533 c8a773e - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=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=-2 threads=6 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=2 keyint=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, mp4, to 'output.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      artist          : a1
  
      album           :
  
      comment         : 
  
      date            : 0
  
      genre           :
  
      title           : a1
  
      encoder         : Lavf56.25.101
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 426x240 [SAR 1:1 DAR 71:40], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
  
      Metadata:
  
        encoder         : Lavc56.26.100 libx264
  
      Stream #0:1(und): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
        encoder         : Lavc56.26.100 libvo_aacenc
  
  Stream mapping:
  
    Stream #0:0 (h264) -> overlay:main (graph 0)
  
    Stream #0:2 (mjpeg) -> overlay:overlay (graph 0)
  
    overlay (graph 0) -> Stream #0:0 (libx264)
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
  
  Press [q] to stop, [?] for help
  
  [Parsed_overlay_0 @ 0x7f9520518800] [framesync @ 0x7f9521021e28] Buffer queue overflow, dropping.
  
      Last message repeated 385 times
  
  [Parsed_overlay_0 @ 0x7f9520518800] [framesync @ 0x7f9521021e28] Buffer queue overflow, dropping.
  
      Last message repeated 564 times
  
  [Parsed_overlay_0 @ 0x7f9520518800] [framesync @ 0x7f9521021e28] Buffer queue overflow, dropping.
  
      Last message repeated 546 times
  
  [Parsed_overlay_0 @ 0x7f9520518800] [framesync @ 0x7f9521021e28] Buffer queue overflow, dropping.
  
      Last message repeated 569 times
  
  [Parsed_overlay_0 @ 0x7f9520518800] [framesync @ 0x7f9521021e28] Buffer queue overflow, dropping.
  
      Last message repeated 593 times
  
  [Parsed_overlay_0 @ 0x7f9520518800] [framesync @ 0x7f9521021e28] Buffer queue overflow, dropping.
  
      Last message repeated 312 times
  
  frame= 3041 fps=645 q=-1.0 Lsize=    1800kB time=00:01:41.52 bitrate= 145.3kbits/s dup=2975 drop=0
  
  video:149kB audio:1587kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.700745%
  
  [libx264 @ 0x7f9521030e00] frame I:14    Avg QP:19.91  size:  6947
  
  [libx264 @ 0x7f9521030e00] frame P:768   Avg QP:10.30  size:    27
  
  [libx264 @ 0x7f9521030e00] frame B:2259  Avg QP:13.67  size:    15
  
  [libx264 @ 0x7f9521030e00] consecutive B-frames:  0.9%  0.1%  0.1% 98.9%
  
  [libx264 @ 0x7f9521030e00] mb I  I16..4: 18.7% 59.0% 22.3%
  
  [libx264 @ 0x7f9521030e00] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.1%  0.0%  0.0%  0.0%  0.0%    skip:99.9%
  
  [libx264 @ 0x7f9521030e00] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.1%  0.0%  0.0%  direct: 0.0%  skip:99.9%  L0:50.7% L1:49.3% BI: 0.0%
  
  [libx264 @ 0x7f9521030e00] 8x8 transform intra:59.1% inter:31.9%
  
  [libx264 @ 0x7f9521030e00] coded y,uvDC,uvAC intra: 21.4% 12.4% 7.4% inter: 0.0% 0.0% 0.0%
  
  [libx264 @ 0x7f9521030e00] i16 v,h,dc,p: 39% 30% 30%  0%
  
  [libx264 @ 0x7f9521030e00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 34% 47% 16%  1%  0%  0%  1%  0%  1%
  
  [libx264 @ 0x7f9521030e00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 38% 15%  3%  3%  3%  6%  4%  7%
  
  [libx264 @ 0x7f9521030e00] i8c dc,h,v,p: 80% 15%  4%  1%
  
  [libx264 @ 0x7f9521030e00] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x7f9521030e00] ref P L0: 96.5%  1.2%  2.3%
  
  [libx264 @ 0x7f9521030e00] ref B L0: 51.5% 48.5%
  
  [libx264 @ 0x7f9521030e00] ref B L1: 99.6%  0.4%
  
  [libx264 @ 0x7f9521030e00] kb/s:11.97