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• First overlay text not lasting

  14 octobre 2018, par Pier Giorgio Misley

  I have this snippet of code, adding two overlayed texts with same effects/durations in two different part of my video.

  -i "input.mp4" -filter_complex "color=black:100x100,format=yuva444p[c];[c][0]scale2ref[ct][mv0]; [ct]setsar=1,split=2[t1][t2]; [t1]drawtext=fontfile=Arial.ttf:text='Pippo':fontcolor=white:fontsize=32:box=1: boxcolor=black@0.5:boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2 - 20,fade=t=in:st=6:d=2:alpha=1,fade=t=out:st=19:d=2:alpha=1[txta1];[t2]drawtext=fontfile=Arial.ttf:text='Topolino':fontcolor=white:fontsize=32:box=1: boxcolor=black@0.5:boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2 + 20,fade=t=in:st=6:d=2:alpha=1,fade=t=out:st=19:d=2:alpha=1[txta2];[mv0][txta1]overlay=0:0:shortest=1[mv1];[mv1][txta2]overlay=0:0:shortest=1" "output.mp4"

  Somewhy, the second text, "Topolino" lasts perfectly from the fade-in to the fade-out.

  The first text ("Pippo") is appearing and disappearing immediatly.

  They have the same effect, so what am I doing wrong ?

  Thanks

  ---

  Edit : added output

  Error : ffmpeg version N-90893-gcae6f806a6 Copyright (c) 2000-2018 the
  FFmpeg developers

  Error : built with gcc 7.3.0 (GCC)

  Error : configuration : —enable-gpl —enable-version3 —enable-sdl2
  —enable-bzlib —enable-fontconfig —enable-gnutls —enable-iconv —enable-libass —enable-libbluray —enable-libfreetype —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libopus —enable-libshine —enable-libsnappy —enable-libsoxr —enable-libtheora —enable-libtwolame —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxml2 —enable-libzimg —enable-lzma —enable-zlib —enable-gmp —enable-libvidstab —enable-libvorbis —enable-libvo-amrwbenc —enable-libmysofa —enable-libspeex —enable-libxvid —enable-libaom —enable-libmfx —enable-amf —enable-ffnvcodec —enable-cuvid —enable-d3d11va —enable-nvenc —enable-nvdec —enable-dxva2 —enable-avisynth

  Error : libavutil 56. 17.100 / 56. 17.100

  Error : libavcodec 58. 19.100 / 58. 19.100

  Error : libavformat 58. 13.100 / 58. 13.100

  Error : libavdevice 58. 4.100 / 58. 4.100

  Error : libavfilter 7. 21.100 / 7. 21.100

  Error : libswscale 5. 2.100 / 5. 2.100

  Error : libswresample 3. 2.100 / 3. 2.100

  Error : libpostproc 55. 2.100 / 55. 2.100

  Error : Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ’D :\AREA\video.mp4’ :

  Error : Metadata :

  Error : major_brand : isom

  Error : minor_version : 512

  Error : compatible_brands : isomiso2avc1mp41

  Error : encoder : Lavf58.13.100

  Error : Duration : 00:02:12.50, start : 0.000000, bitrate : 3149 kb/s

  Error : Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661),
  yuv420p(tv, bt709), 1024x600 [SAR 1:1 DAR 128:75], 3014 kb/s, 24 fps,
  24 tbr, 19200 tbn, 50 tbc (default)

  Error : Metadata :

  Error : handler_name : VideoHandler

  Error : timecode : 00:00:00:00

  Error : Stream #0:1(und) : Audio : aac (LC) (mp4a / 0x6134706D),
  44100 Hz, stereo, fltp, 129 kb/s (default)

  Error : Metadata :

  Error : handler_name : SoundHandler

  Error : Stream #0:2(eng) : Data : none (tmcd / 0x64636D74)

  Error : Metadata :

  Error : handler_name : TimeCodeHandler

  Error : timecode : 00:00:00:00

  Error : Fontconfig error : Cannot load default config file

  Error : [Parsed_drawtext_5 @ 000002a7c251ea00] Using
  "C :/WINDOWS/fonts/mingliub.ttc"

  Error : Fontconfig error : Cannot load default config file

  Error : [Parsed_drawtext_8 @ 000002a7c2c52a00] Using
  "C :/WINDOWS/fonts/mingliub.ttc"

  Error : Stream mapping :

  Error : Stream #0:0 (h264) -> scale2ref:ref (graph 0)

  Error : overlay (graph 0) -> Stream #0:0 (libx264)

  Error : Stream #0:1 -> #0:1 (aac (native) -> aac (native))

  Error : Press [q] to stop, [?] for help

  Error : Fontconfig error : Cannot load default config file

  Error : [Parsed_drawtext_5 @ 000002a7c3e6aec0] Using
  "C :/WINDOWS/fonts/mingliub.ttc"

  Error : Fontconfig error : Cannot load default config file

  Error : [Parsed_drawtext_8 @ 000002a7c3e6ac80] Using
  "C :/WINDOWS/fonts/mingliub.ttc"

  Error : [libx264 @ 000002a7c2a9d800] using SAR=1/1

  Error : [libx264 @ 000002a7c2a9d800] using cpu capabilities : MMX2
  SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2

  Error : [libx264 @ 000002a7c2a9d800] profile High, level 3.1

  Error : [libx264 @ 000002a7c2a9d800] 264 - core 155 r2901 7d0ff22 -
  H.264/MPEG-4 AVC codec - Copyleft 2003-2018 -
  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=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=24 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

  Error : Output #0, mp4, to ’D :\AREA\output_text.mp4’ :

  Error : Metadata :

  Error : major_brand : isom

  Error : minor_version : 512

  Error : compatible_brands : isomiso2avc1mp41

  Error : encoder : Lavf58.13.100

  Error : Stream #0:0 : Video : h264 (libx264) (avc1 / 0x31637661),
  yuv420p, 1024x600 [SAR 1:1 DAR 128:75], q=-1—1, 24 fps, 12288 tbn, 24
  tbc (default)

  Error : Metadata :

  Error : encoder : Lavc58.19.100 libx264

  Error : Side data :

  Error : cpb : bitrate max/min/avg : 0/0/0 buffer size : 0 vbv_delay :
  -1

  Error : Stream #0:1(und) : Audio : aac (LC) (mp4a / 0x6134706D),
  44100 Hz, stereo, fltp, 128 kb/s (default)

  Error : Metadata :

  Error : handler_name : SoundHandler

  Error : encoder : Lavc58.19.100 aac

  Error : frame= 61 fps=0.0 q=28.0 size= 0kB time=00:00:02.83
  bitrate= 0.1kbits/s speed=5.65x

  Error : frame= 137 fps=136 q=28.0 size= 0kB time=00:00:05.99
  bitrate= 0.1kbits/s speed=5.94x

  [...]

  Error : frame= 3180 fps= 88 q=-1.0 Lsize= 16533kB time=00:02:12.51
  bitrate=1022.0kbits/s speed=3.65x

  Error : video:14352kB audio:2080kB subtitle:0kB other streams:0kB
  global headers:0kB muxing overhead : 0.611671%

  Error : [libx264 @ 000002a7c2a9d800] frame I:14 Avg QP:17.18 size :
  42960

  Error : [libx264 @ 000002a7c2a9d800] frame P:1170 Avg QP:20.09 size :
  9916

  Error : [libx264 @ 000002a7c2a9d800] frame B:1996 Avg QP:21.54 size :
  1249

  Error : [libx264 @ 000002a7c2a9d800] consecutive B-frames : 3.3% 38.3%
  2.5% 56.0%

  Error : [libx264 @ 000002a7c2a9d800] mb I I16..4 : 27.0% 61.1% 11.8%

  Error : [libx264 @ 000002a7c2a9d800] mb P I16..4 : 4.3% 5.8% 0.3%
  P16..4 : 34.6% 9.8% 7.3% 0.0% 0.0% skip:38.0%

  Error : [libx264 @ 000002a7c2a9d800] mb B I16..4 : 0.3% 0.5% 0.0%
  B16..8 : 19.5% 0.9% 0.1% direct : 2.0% skip:76.6% L0:39.8% L1:55.2%
  BI : 5.0%

  Error : [libx264 @ 000002a7c2a9d800] 8x8 transform intra:57.0%
  inter:84.0%

  Error : [libx264 @ 000002a7c2a9d800] coded y,uvDC,uvAC intra : 33.3%
  65.4% 24.9% inter : 10.4% 17.5% 2.4%

  Error : [libx264 @ 000002a7c2a9d800] i16 v,h,dc,p : 59% 17% 12% 13%

  Error : [libx264 @ 000002a7c2a9d800] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu : 35%
  15% 33% 2% 3% 3% 3% 3% 2%

  Error : [libx264 @ 000002a7c2a9d800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu : 36%
  18% 13% 4% 6% 7% 6% 6% 4%

  Error : [libx264 @ 000002a7c2a9d800] i8c dc,h,v,p : 52% 17% 24% 7%

  Error : [libx264 @ 000002a7c2a9d800] Weighted P-Frames : Y:29.0%
  UV:17.2%

  Error : [libx264 @ 000002a7c2a9d800] ref P L0 : 65.1% 15.7% 14.5% 4.3%
  0.5%

  Error : [libx264 @ 000002a7c2a9d800] ref B L0 : 89.7% 8.2% 2.1%

  Error : [libx264 @ 000002a7c2a9d800] ref B L1 : 98.1% 1.9%

  Error : [libx264 @ 000002a7c2a9d800] kb/s:887.30

  Error : [aac @ 000002a7c24a6e00] Qavg : 179.786

  Error :

• OpenCV VideoWriter using ffmpeg with "Could not open codec 'libx264'" Error

  19 avril, par user2262504

  I am new to OpenCV, and I want write Mat images into video using VideoWriter on Ubuntu 12.04. But when constructing VideoWriter, errors came out.

  



  It seems that OpenCV invoke ffmpeg API using default parameters and ffmpeg invoke x264 using its default parameters. Then these setting is broken for libx264. Thus the "Could not open codec 'libx264'" error.

  



  Anyone has ideas to solve this problem ?

  



  More specifically :

  



  

  1. anyone knows where and how OpenCV invoke ffmpeg API ?

  


  2. how to change ffmpeg default settings using code, hopefull, can be easily embeded into OpenCV ?

  


  3. will changes of default in ffmpeg be carried to libx264 ?

  


  



  Errors :

  



  1. Uising CV_FOURCC(&#x27;H&#x27;, &#x27;2&#x27;, &#x27;6&#x27;, &#x27;4&#x27;)&#xA;[libx264 @ 0x255de40] broken ffmpeg default settings detected&#xA;[libx264 @ 0x255de40] use an encoding preset (e.g. -vpre medium)&#xA;[libx264 @ 0x255de40] preset usage: -vpre <speed> -vpre <profile>&#xA;[libx264 @ 0x255de40] speed presets are listed in x264 --help&#xA;[libx264 @ 0x255de40] profile is optional; x264 defaults to high&#xA;Could not open codec &#x27;libx264&#x27;: Unspecified error&#xA;&#xA;2. Using FOURCC = -1 to invoke user customized codec&#xA;OpenCV Error: Unsupported format or combination of formats (Gstreamer Opencv &#xA;backend doesn&#x27;t support this codec acutally.) in CvVideoWriter_GStreamer::open, &#xA;file /home/XXX/Downloads/opencv-2.4.8/modules/highgui/src/cap_gstreamer.cpp, &#xA;line 505 terminate called after throwing an instance of &#x27;cv::Exception&#x27;&#xA;what():  /home/XXX/Downloads/opencv-2.4.8/modules/highgui/src/cap_gstreamer.cpp:&#xA;505: error: (-210) Gstreamer Opencv backend doesn&#x27;t support this codec acutally.&#xA;in function CvVideoWriter_GStreamer::open&#xA;</profile></speed>

  



  Codes :

  



  int main(int argc, char *argv[])
{
    VideoWriter outputVideo;
    bool fourcc_on = true; //switch on / off different error
    if (fourcc_on)
        outputVideo.open("outVideo.avi", CV_FOURCC('H', '2', '6', '4'), 25, Size(100, 100), true);
    else
        outputVideo.open("outVideo.avi", -1, 25, Size(100, 100), true);

    if (!outputVideo.isOpened())
    {
        cout  << "Could not open the output video for write" << endl;
        return -1;
    }
    return 0;
}


  



  OpenCV Configuration :

  



  -- Detected version of GNU GCC: 46 (406)
-- Found OpenEXR: /usr/lib/libIlmImf.so
-- Looking for linux/videodev.h
-- Looking for linux/videodev.h - not found
-- Looking for linux/videodev2.h
-- Looking for linux/videodev2.h - found
-- Looking for sys/videoio.h
-- Looking for sys/videoio.h - not found
-- Looking for libavformat/avformat.h
-- Looking for libavformat/avformat.h - found
-- Looking for ffmpeg/avformat.h
-- Looking for ffmpeg/avformat.h - not found
-- Could NOT find JNI (missing:  JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH) 
-- 
-- General configuration for OpenCV 2.4.8 =====================================
--   Version control:               unknown
-- 
--   Platform:
--     Host:                        Linux 3.8.0-38-generic x86_64
--     CMake:                       2.8.7
--     CMake generator:             Unix Makefiles
--     CMake build tool:            /usr/bin/make
--     Configuration:               RELEASE
-- 
--   C/C++:
--     Built as dynamic libs?:      YES
--     C++ Compiler:                /usr/bin/c++  (ver 4.6)
--     C++ flags (Release):         -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG  -DNDEBUG
--     C++ flags (Debug):           -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
--     C Compiler:                  /usr/bin/gcc
--     C flags (Release):           -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG  -DNDEBUG
--     C flags (Debug):             -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
--     Linker flags (Release):      
--     Linker flags (Debug):        
--     Precompiled headers:         YES
-- 
--   OpenCV modules:
--     To be built:                 core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib python stitching superres ts videostab
--     Disabled:                    world
--     Disabled by dependency:      -
--     Unavailable:                 androidcamera dynamicuda java
-- 
--   GUI: 
--     QT:                          NO
--     GTK+ 2.x:                    YES (ver 2.24.10)
--     GThread :                    YES (ver 2.32.4)
--     GtkGlExt:                    NO
--     OpenGL support:              NO
-- 
--   Media I/O: 
--     ZLib:                        /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.3.4)
--     JPEG:                        /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
--     PNG:                         /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.46)
--     TIFF:                        /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 3.9.5)
--     JPEG 2000:                   /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
--     OpenEXR:                     /usr/lib/libImath.so /usr/lib/libIlmImf.so /usr/lib/libIex.so /usr/lib/libHalf.so /usr/lib/libIlmThread.so (ver 1.6.1)
-- 
--   Video I/O:
--     DC1394 1.x:                  NO
--     DC1394 2.x:                  YES (ver 2.2.0)
--     FFMPEG:                      YES
--       codec:                     YES (ver 55.58.105)
--       format:                    YES (ver 55.37.101)
--       util:                      YES (ver 52.78.100)
--       swscale:                   YES (ver 2.6.100)
--       gentoo-style:              YES
--     GStreamer:                   
--       base:                      YES (ver 0.10.36)
--       app:                       YES (ver 0.10.36)
--       video:                     YES (ver 0.10.36)
--     OpenNI:                      NO
--     OpenNI PrimeSensor Modules:  NO
--     PvAPI:                       NO
--     GigEVisionSDK:               NO
--     UniCap:                      NO
--     UniCap ucil:                 NO
--     V4L/V4L2:                    Using libv4l (ver 1.0.1)
--     XIMEA:                       NO
--     Xine:                        NO
-- 
--   Other third-party libraries:
--     Use IPP:                     NO
--     Use Eigen:                   NO
--     Use TBB:                     NO
--     Use OpenMP:                  NO
--     Use GCD                      NO
--     Use Concurrency              NO
--     Use C=:                      NO
--     Use Cuda:                    NO
--     Use OpenCL:                  YES
-- 
--   OpenCL:
--     Version:                     dynamic
--     Include path:                /home/shixudongleo/Downloads/opencv-2.4.8/3rdparty/include/opencl/1.2
--     Use AMD FFT:                 NO
--     Use AMD BLAS:                NO
-- 
--   Python:
--     Interpreter:                 /usr/bin/python (ver 2.7.3)
--     Libraries:                   /usr/lib/libpython2.7.so
--     numpy:                       /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.6.1)
--     packages path:               lib/python2.7/dist-packages
-- 
--   Java:
--     ant:                         NO
--     JNI:                         NO
--     Java tests:                  NO
-- 
--   Documentation:
--     Build Documentation:         NO
--     Sphinx:                      NO
--     PdfLaTeX compiler:           /usr/bin/pdflatex
-- 
--   Tests and samples:
--     Tests:                       YES
--     Performance tests:           YES
--     C/C++ Examples:              NO
-- 
--   Install path:                  /usr/local
-- 
--   cvconfig.h is in:              /home/shixudongleo/Downloads/opencv-2.4.8/build
-- -----------------------------------------------------------------
-- 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/XXX/Downloads/opencv-2.4.8/build


  



  FFMPEG

  



  ffmpeg is enable to support OpenCV and libx264 is enabled when compiling ffmpeg.
By using ffmpeg command line, libx264 is running normally.

  



  $ ffmpeg -i test.avi -vcodec libx264 test.mp4
ffmpeg -i test.avi -vcodec libx264 test.mp4 > ~/Downloads/ffmpeg_log.txt
ffmpeg version 2.2.git Copyright (c) 2000-2014 the FFmpeg developers
  built on Apr 24 2014 16:39:51 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab --enable-shared --enable-pic
  libavutil      52. 78.100 / 52. 78.100
  libavcodec     55. 58.105 / 55. 58.105
  libavformat    55. 37.101 / 55. 37.101
  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, avi, from 'test.avi':
  Duration: 00:00:03.73, start: 0.000000, bitrate: 1757 kb/s
    Stream #0:0: Video: msvideo1 (CRAM / 0x4D415243), rgb555le, 320x240, 1781 kb/s, 15 tbr, 15 tbn, 15 tbc
    Metadata:
      title           : julius.avi Video #1
File 'test.mp4' already exists. Overwrite ? [y/N] y
No pixel format specified, yuv444p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x25d08e0] using cpu capabilities: none!
[libx264 @ 0x25d08e0] profile High 4:4:4 Predictive, level 1.2, 4:4:4 8-bit
[libx264 @ 0x25d08e0] 264 - core 142 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - 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=4 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=2 keyint=250 keyint_min=15 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 'test.mp4':
  Metadata:
    encoder         : Lavf55.37.101
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 320x240, q=-1--1, 15360 tbn, 15 tbc
    Metadata:
      title           : julius.avi Video #1
Stream mapping:
  Stream #0:0 -> #0:0 (msvideo1 -> libx264)
Press [q] to stop, [?] for help
frame=   56 fps=0.0 q=-1.0 Lsize=     321kB time=00:00:03.60 bitrate= 731.0kbits/s    
video:320kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.409949%
[libx264 @ 0x25d08e0] frame I:3     Avg QP:15.36  size:  7975
[libx264 @ 0x25d08e0] frame P:38    Avg QP:26.05  size:  6230
[libx264 @ 0x25d08e0] frame B:15    Avg QP:28.25  size:  4418
[libx264 @ 0x25d08e0] consecutive B-frames: 46.4% 53.6%  0.0%  0.0%
[libx264 @ 0x25d08e0] mb I  I16..4:  1.4% 72.8% 25.8%
[libx264 @ 0x25d08e0] mb P  I16..4:  1.6%  5.7% 15.1%  P16..4:  7.6%  6.3%  7.4%  0.0%  0.0%    skip:56.3%
[libx264 @ 0x25d08e0] mb B  I16..4:  0.2%  1.0%  2.0%  B16..8: 13.3%  7.8%  8.7%  direct: 8.3%  skip:58.8%  L0:34.9% L1:36.6% BI:28.5%
[libx264 @ 0x25d08e0] 8x8 transform intra:37.7% inter:2.3%
[libx264 @ 0x25d08e0] coded y,u,v intra: 52.1% 42.1% 30.1% inter: 19.6% 9.2% 5.2%
[libx264 @ 0x25d08e0] i16 v,h,dc,p: 56% 17% 24%  2%
[libx264 @ 0x25d08e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 16% 68%  1%  1%  1%  1%  1%  1%
[libx264 @ 0x25d08e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 18% 28%  5%  6%  5%  7%  5%  6%
[libx264 @ 0x25d08e0] Weighted P-Frames: Y:31.6% UV:21.1%
[libx264 @ 0x25d08e0] ref P L0: 70.5%  9.0% 12.1%  6.5%  2.0%
[libx264 @ 0x25d08e0] ref B L0: 91.3%  8.7%
[libx264 @ 0x25d08e0] kb/s:700.56


  


• Video becomes choppy when the order in the hstack filter is changed

  25 octobre 2018, par Mayank

  I have a FFmpeg command wherein I am merging 2 videos side by side using hstack filter. When I place first video on the right hand side and second video on the left hand side, the final merged video is perfect in quality and plays smoothly.

  However, when I swap the order in hstack filter, the final video is very choppy.

  Can someone please let me know the issue in this command ? Many thanks in advance.

  Also, the file size of the non working file is almost double than that of working file. Can you explain why ?

  Here is the working command :

  ffmpeg -i 1_a.opus -i 2_a.opus -itsoffset 0.024 -i 1_v.mp4 -itsoffset 0.113 -i 2_v.mp4 -filter_complex "[1:a]adelay=15646|15646[a1]; [0:a][a1]amix; [3:v]trim=0:15.646,geq=0:128:128[silence]; [3:v]fifo[3v]; [silence][3v]concat[3_v_silence]; [3_v_silence][2:v]hstack" -preset ultrafast -y n_m_bars_try2.mp4

  output :

  ffmpeg version 4.0.2-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg
  
    libavutil      56. 14.100 / 56. 14.100
  
    libavcodec     58. 18.100 / 58. 18.100
  
    libavformat    58. 12.100 / 58. 12.100
  
    libavdevice    58.  3.100 / 58.  3.100
  
    libavfilter     7. 16.100 /  7. 16.100
  
    libswscale      5.  1.100 /  5.  1.100
  
    libswresample   3.  1.100 /  3.  1.100
  
    libpostproc    55.  1.100 / 55.  1.100
  
  Input #0, ogg, from '1_a.opus':
  
    Duration: 00:01:03.82, start: -0.020000, bitrate: 37 kb/s
  
      Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
  
  Input #1, ogg, from '2_a.opus':
  
    Duration: 00:00:52.40, start: -0.020000, bitrate: 44 kb/s
  
      Stream #1:0: Audio: opus, 48000 Hz, stereo, fltp
  
  Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '1_v.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.12.100
  
    Duration: 00:01:03.85, start: 0.000000, bitrate: 2644 kb/s
  
      Stream #2:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 2633 kb/s, 333 fps, 333 tbr, 10656 tbn, 666 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '2_v.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.12.100
  
    Duration: 00:00:52.32, start: 0.000000, bitrate: 861 kb/s
  
      Stream #3:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 860 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Stream mapping:
  
    Stream #0:0 (opus) -> amix:input0
  
    Stream #1:0 (opus) -> adelay
  
    Stream #2:0 (h264) -> hstack:input1
  
    Stream #3:0 (h264) -> trim
  
    Stream #3:0 (h264) -> fifo
  
    amix -> Stream #0:0 (aac)
  
    hstack -> Stream #0:1 (libx264)
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x528d600] using SAR=1/1
  
  [libx264 @ 0x528d600] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowShuffle
  
  [libx264 @ 0x528d600] profile Constrained Baseline, level 3.1
  
  [libx264 @ 0x528d600] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
  
  Output #0, mp4, to 'navid_mayank_bars_try2.mp4':
  
    Metadata:
  
      encoder         : Lavf58.12.100
  
      Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc58.18.100 aac
  
      Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x480 [SAR 1:1 DAR 8:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        encoder         : Lavc58.18.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  frame= 1704 fps= 42 q=-1.0 Lsize=   14440kB time=00:01:08.12 bitrate=1736.5kbits/s dup=3 drop=21229 speed=1.69x    
  
  video:13448kB audio:953kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.269503%
  
  [aac @ 0x52b8680] Qavg: 22255.799
  
  [libx264 @ 0x528d600] frame I:7     Avg QP:16.29  size: 46284
  
  [libx264 @ 0x528d600] frame P:1697  Avg QP:18.36  size:  7924
  
  [libx264 @ 0x528d600] mb I  I16..4: 100.0%  0.0%  0.0%
  
  [libx264 @ 0x528d600] mb P  I16..4:  1.8%  0.0%  0.0%  P16..4: 31.0%  0.0%  0.0%  0.0%  0.0%    skip:67.2%
  
  [libx264 @ 0x528d600] coded y,uvDC,uvAC intra: 29.9% 59.3% 17.5% inter: 13.4% 24.6% 0.8%
  
  [libx264 @ 0x528d600] i16 v,h,dc,p: 36% 29% 18% 17%
  
  [libx264 @ 0x528d600] i8c dc,h,v,p: 42% 25% 21% 11%
  
  [libx264 @ 0x528d600] kb/s:1616.23

  Non working command :

  ffmpeg -i 1_a.opus -i 2_a.opus -itsoffset 0.024 -i 1_v.mp4 -itsoffset 0.113 -i 2_v.mp4 -filter_complex "[1:a]adelay=15646|15646[a1]; [0:a][a1]amix; [3:v]trim=0:15.646,geq=0:128:128[silence]; [3:v]fifo[3v]; [silence][3v]concat[3_v_silence]; [2:v][3_v_silence]hstack" -preset ultrafast -y m_n_bars_try2.mp4

  output :

  ffmpeg version 4.0.2-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg
  
    libavutil      56. 14.100 / 56. 14.100
  
    libavcodec     58. 18.100 / 58. 18.100
  
    libavformat    58. 12.100 / 58. 12.100
  
    libavdevice    58.  3.100 / 58.  3.100
  
    libavfilter     7. 16.100 /  7. 16.100
  
    libswscale      5.  1.100 /  5.  1.100
  
    libswresample   3.  1.100 /  3.  1.100
  
    libpostproc    55.  1.100 / 55.  1.100
  
  Input #0, ogg, from '1_a.opus':
  
    Duration: 00:01:03.82, start: -0.020000, bitrate: 37 kb/s
  
      Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
  
  Input #1, ogg, from '2_a.opus':
  
    Duration: 00:00:52.40, start: -0.020000, bitrate: 44 kb/s
  
      Stream #1:0: Audio: opus, 48000 Hz, stereo, fltp
  
  Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '1_v.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.12.100
  
    Duration: 00:01:03.85, start: 0.000000, bitrate: 2644 kb/s
  
      Stream #2:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 2633 kb/s, 333 fps, 333 tbr, 10656 tbn, 666 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '2_v.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.12.100
  
    Duration: 00:00:52.32, start: 0.000000, bitrate: 861 kb/s
  
      Stream #3:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 860 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Stream mapping:
  
    Stream #0:0 (opus) -> amix:input0
  
    Stream #1:0 (opus) -> adelay
  
    Stream #2:0 (h264) -> hstack:input0
  
    Stream #3:0 (h264) -> trim
  
    Stream #3:0 (h264) -> fifo
  
    amix -> Stream #0:0 (aac)
  
    hstack -> Stream #0:1 (libx264)
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x6d21600] using SAR=1/1
  
  [libx264 @ 0x6d21600] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowShuffle
  
  [libx264 @ 0x6d21600] profile Constrained Baseline, level 5.1
  
  [libx264 @ 0x6d21600] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
  
  Output #0, mp4, to 'mayank_navid_bars_try2.mp4':
  
    Metadata:
  
      encoder         : Lavf58.12.100
  
      Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc58.18.100 aac
  
      Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x480 [SAR 1:1 DAR 8:3], q=-1--1, 333 fps, 10656 tbn, 333 tbc (default)
  
      Metadata:
  
        encoder         : Lavc58.18.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  Past duration 0.999992 too large
  
      Last message repeated 12 times
  
  More than 1000 frames duplicated   33280kB time=00:01:08.03 bitrate=4007.4kbits/s dup=982 drop=1590 speed=0.536x    
  
  frame=22679 fps=177 q=-1.0 Lsize=   33892kB time=00:01:08.10 bitrate=4076.9kbits/s dup=1339 drop=1590 speed=0.531x    
  
  video:32804kB audio:953kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.401324%
  
  [aac @ 0x6d4c680] Qavg: 22255.799
  
  [libx264 @ 0x6d21600] frame I:91    Avg QP:15.31  size: 51639
  
  [libx264 @ 0x6d21600] frame P:22588 Avg QP:18.24  size:  1279
  
  [libx264 @ 0x6d21600] mb I  I16..4: 100.0%  0.0%  0.0%
  
  [libx264 @ 0x6d21600] mb P  I16..4:  0.2%  0.0%  0.0%  P16..4: 13.0%  0.0%  0.0%  0.0%  0.0%    skip:86.8%
  
  [libx264 @ 0x6d21600] coded y,uvDC,uvAC intra: 44.9% 54.0% 29.9% inter: 2.0% 10.9% 0.1%
  
  [libx264 @ 0x6d21600] i16 v,h,dc,p: 45% 24% 13% 18%
  
  [libx264 @ 0x6d21600] i8c dc,h,v,p: 51% 20% 18% 11%
  
  [libx264 @ 0x6d21600] kb/s:3945.79