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• ffmpeg encoding a video with time_base Not equal to framerate does not work in HML5 video players

  1er juillet 2019, par Gilgamesh22

  I have a time_base of 90000 with a frame rate of 30. I can generate a h264 video and have it work in VLC but this video does not work in the browser player. If I change the time_base to 30 It works fine.

  Note : I am changing the frame->pts appropriately to match the time_base.
  Note : Video does not have audio stream

  //header.h
  
  AVCodecContext *cctx;
  
  AVStream* stream;

  Here is the non working example code

  //source.cpp
  
  stream->time_base = { 1, 90000 };
  
  stream->r_frame_rate = { fps, 1 };
  
  stream->avg_frame_rate = { fps, 1 };
  
  
  
  cctx->codec_id = codecId;
  
  cctx->time_base = { 1 ,  90000 };
  
  cctx->framerate = { fps, 1 };
  
  
  
  // ...... 
  
  // add frame code later on timestamp are in millisecond
  
  frame->pts = (timestamp - startTimeStamp)* 90;

  Here is the working example code

  //source.cpp
  
  stream->time_base = { 1, fps};
  
  stream->r_frame_rate = { fps, 1 };
  
  stream->avg_frame_rate = { fps, 1 };
  
  
  
  cctx->codec_id = codecId;
  
  cctx->time_base = { 1 ,  fps};
  
  cctx->framerate = { fps, 1 };
  
  
  
  // ...... 
  
  //  add frame code timestamp are in millisecond
  
  frame->pts = (timestamp - startTimeStamp)/(1000/fps);

  Any ideas on why the second example works and the first does not in the HTML5 video player.

• Fontconfig error : Cannot load default config file

  28 juin 2019, par sachin

  I am trying to add text in the video, but I am getting -

  Fontconfig error : Cannot load default config file
  [Parsed_drawtext_0 @ 0xea1aeaa0] impossible to init fontconfig

  below cmd to add text using FFmpeg lib-

  String[] cmd = new String[]
  "-i", savedVideoFilePath, "-vf", "drawtext=text="+"’"+timeStamp+"’"+" :
  fontfile=/android_asset/fonts/Poppins-Medium.ttf : fontcolor=white :
  fontsize=24 : x=(w-tw)/2 : y=(h/PHI)+th box=0 :","-codec:a" ,"copy" ,
  output_path  ;

  log details -

  Error opening filters ! 2019-06-10 18:04:58.027
  18678-18678/com.rs.vir.debug E/FFMPEG FAilure : FAILED with output :
  ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.8 (GCC)
  configuration : —target-os=linux —cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi-
  —arch=arm —cpu=cortex-a8 —enable-runtime-cpudetect —sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot
  —enable-pic —enable-libx264 —enable-libass —enable-libfreetype —enable-libfribidi —enable-libmp3lame —enable-fontconfig —enable-pthreads —disable-debug —disable-ffserver —enable-version3 —enable-hardcoded-tables —disable-ffplay —disable-ffprobe —enable-gpl —enable-yasm —disable-doc —disable-shared —enable-static —pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config —prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a —extra-cflags=’-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include
  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all’ —extra-ldflags=’-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib
  -Wl,-z,relro -Wl,-z,now -pie’ —extra-libs=’-lpng -lexpat -lm’ —extra-cxxflags=
  libavutil 55. 17.103 / 55. 17.103
  libavcodec 57. 24.102 / 57. 24.102
  libavformat 57. 25.100 / 57. 25.100
  libavdevice 57. 0.101 / 57. 0.101
  libavfilter 6. 31.100 / 6. 31.100
  libswscale 4. 0.100 / 4. 0.100
  libswresample 2. 0.101 / 2. 0.101
  libpostproc 54. 0.100 / 54. 0.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ’/data/user/0/com.rs.vir.debug/files/VIR_Customer/EVINV12207201906100303240000/Videos/sample.mp4’ :
  Metadata :
  major_brand : mp42
  minor_version : 0
  compatible_brands : isommp42
  creation_time : 2019-06-10 12:34:55
  com.android.version : 8.1.0
  Duration : 00:00:06.66, start : 0.000000, bitrate : 3724 kb/s
  Stream #0:0(eng) : Video : h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x480, 3464 kb/s, SAR 1:1
  DAR 3:2, 30.04 fps, 30 tbr, 90k tbn, 180k tbc (default)
  Metadata :
  rotate : 90
  creation_time : 2019-06-10 12:34:55
  handler_name : VideoHandle
  Side data :
  displaymatrix : rotation of -90.00 degrees
  Stream #0:1(eng) : Audio : aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 255 kb/s (default)
  Metadata :
  creation_time : 2019-06-10 12:34:55
  handler_name : SoundHandle
  Fontconfig error : Cannot load default config file
  [Parsed_drawtext_0 @ 0xea1aeaa0] impossible to init fontconfig
  [AVFilterGraph @ 0xea1cb040] Error initializing filter ’drawtext’ with args
  ’text=java.util.GregorianCalendar[time=1560170097814,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=libcore.util.ZoneInfo[id="Asia/Kolkata",mRawOffset=19800000,mEarliestRawOffset=19800000,mUseDst=false,mDstSavings=0,transitions=5],firstDayOfWeek=2,minimalDaysInFirstWeek=4,ERA=1,YEAR=2019,MONTH=5,WEEK_OF_YEAR=24,WEEK_OF_MONTH=2,DAY_OF_MONTH=10,DAY_OF_YEAR=161,DAY_OF_WEEK=2,DAY_OF_WEEK_IN_MONTH=2,AM_PM=1,HOUR=6,HOUR_OF_DAY=18,MINUTE=4,SECOND=57,MILLISECOND=814,ZONE_OFFSET=19800000,DST_OFFSET=0] :
  fontfile=/android_asset/fonts/Poppins-Medium.ttf : fontcolor=white :
  fontsize=24 : x=(w-tw)/2 : y=(h/PHI)+th box=0 :’
  Error opening filters !

  please give me the solution for this.

• FFMPEG RTSP issue

  18 mars 2019, par Joshua G

  So I am trying to stream an EZVIZ camera using FFMPEG. I am able to connect to the camera but when setting a duration like 5 or 10 seconds I get videos of random lengths (7, 5, 10, 30, etc). Sometimes the videos generated are black, sometimes green (though I can see the outlines of things and parts of the timestamp when it is green). I also get videos that show a length say 3 mins or so but they play ulta-fast, like a 3 min video plays in a millisecond and they are all black. Below is the log. Any help would be great !

  ./ffmpeg.exe -err_detect ignore_err -rtsp_transport tcp -i rtsp://un:pw@192.168.0.2/Streaming/channels/101 -vcodec copy -t 00:00:10 c:/Temp/vid.mp4
  
  ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 7.3.0 (GCC)
  
    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
  
    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
  
  [h264 @ 046d7840] non-existing PPS 60 referenced
  
      Last message repeated 1 times
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] no frame!
  
  [h264 @ 046d7840] non-existing PPS 2 referenced
  
      Last message repeated 1 times
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] no frame!
  
  [h264 @ 046d7840] cabac_init_idc 5 overflow
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] no frame!
  
  [h264 @ 046d7840] concealing 15924 DC, 15924 AC, 15924 MV errors in P frame
  
  [h264 @ 046d7840] number of reference frames (0+2) exceeds max (1; probably corrupt input), discarding one
  
  [h264 @ 046d7840] non-existing PPS 28 referenced
  
      Last message repeated 1 times
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] no frame!
  
  [h264 @ 046d7840] non-existing PPS 7 referenced
  
      Last message repeated 1 times
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] no frame!
  
  [h264 @ 046d7840] illegal aspect ratio
  
  [h264 @ 046d7840] non-existing PPS 1 referenced
  
  [h264 @ 046d7840] illegal aspect ratio
  
      Last message repeated 2 times
  
  [h264 @ 046d7840] A non-intra slice in an IDR NAL unit.
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] no frame!
  
  [h264 @ 046d7840] Missing reference picture, default is 0
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] Frame num change from 3 to 413
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] non-existing PPS 1 referenced
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] non-existing PPS 23 referenced
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] slice type 32 too large at 2
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] reference count 1 overflow
  
  [h264 @ 046d7840] slice type 15 too large at 0
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] no frame!
  
  [h264 @ 046d7840] non-existing PPS 22 referenced
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] non-existing PPS 1 referenced
  
  [h264 @ 046d7840] decode_slice_header error
  
  [h264 @ 046d7840] Frame num change from 31 to 495
  
  [h264 @ 046d7840] decode_slice_header error
  
  [rtsp @ 046d4f00] decoding for stream 0 failed
  
  Input #0, rtsp, from 'rtsp://admin:b729sefc@192.168.0.2/Streaming/channels/101':
  
    Metadata:
  
      title           : Media Server V3.2.1
  
      comment         : Media Server Session Description : standard
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 2688x1520 [SAR 1:1 DAR 168:95], 10 fps, 10 tbr, 90k tbn, 20 tbc
  
  Output #0, mp4, to 'c:/Temp/vid.mp4':
  
    Metadata:
  
      title           : Media Server V3.2.1
  
      comment         : Media Server Session Description : standard
  
      encoder         : Lavf58.12.100
  
      Stream #0:0: Video: h264 (Main) (avc1 / 0x31637661), yuvj420p(pc, bt709, progressive), 2688x1520 [SAR 1:1 DAR 168:95], q=2-31, 10 fps, 10 tbr, 90k tbn, 90k tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  [NULL @ 046d7840] illegal reordering_of_pic_nums_idc 706.80 bitrate=1850.5kbits/s speed=5.97x
  
  [NULL @ 046d7840] illegal aspect ratio
  
  [NULL @ 046d7840] non-existing PPS 1 referenced=00:00:07.70 bitrate=2178.9kbits/s speed=4.51x
  
  [NULL @ 046d7840] reference count 2 overflowime=00:00:09.30 bitrate=2255.0kbits/s speed=2.74x
  
  [NULL @ 046d7840] non-existing PPS 1 referenced
  
  frame=   63 fps= 15 q=-1.0 Lsize=    2781kB time=00:00:09.90 bitrate=2301.5kbits/s speed=2.41x
  
  video:2780kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.054839%