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• Filter text disappearing after concat, why ?

  15 août 2018, par GemmaB89

  I’m trying to concatenate 2 videos, while at the same time adding some text to the second one. I’m using php-ffmpeg to do this, with the Sharapov extension, but I have the actual ffmpeg commands.

  To do this it seems to encode the first video, then the second one with the text separately, and then joins them together. Problem is the text appears in the encoded (but un-joined) second video, but as soon as they are joined together it disappears.

  Here are the commands :

  ffmpeg '-y' '-i' 'video_in/first_vid.mp4' '-threads' '8' '-vcodec' 'libx264' '-acodec' 'aac' '-max_muxing_queue_size' '400' '-b:v' '1000k' '-refs' '6' '-coder' '1' '-sc_threshold' '40' '-flags' '+loop' '-me_range' '16' '-subq' '7' '-i_qfactor' '0.71' '-qcomp' '0.6' '-qdiff' '4' '-trellis' '1' '-b:a' '256k' '-ac' '2' '-pass' '1' '-passlogfile' '/tmp/ffmpeg-passes5b73814fa1e29qjif7/pass-5b73814fa1f5b' '/data/tmp/ffmpeg-7a580007c010377da19305b0836e7a4d-5b73814f9ff35.mp4'
  
  
  
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  ffmpeg '-y' '-i' 'video_in/first_vid.mp4' '-threads' '8' '-vcodec' 'libx264' '-acodec' 'aac' '-max_muxing_queue_size' '400' '-b:v' '1000k' '-refs' '6' '-coder' '1' '-sc_threshold' '40' '-flags' '+loop' '-me_range' '16' '-subq' '7' '-i_qfactor' '0.71' '-qcomp' '0.6' '-qdiff' '4' '-trellis' '1' '-b:a' '256k' '-ac' '2' '-pass' '2' '-passlogfile' '/tmp/ffmpeg-passes5b73814fa1e29qjif7/pass-5b73814fa1f5b' '/data/tmp/ffmpeg-7a580007c010377da19305b0836e7a4d-5b73814f9ff35.mp4'
  
  
  
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  ffmpeg '-y' '-i' 'video/second_vid.mp4' '-filter_complex' '[0:v]drawtext=fontfile=/usr/share/fonts/truetype/msttcorefonts/arial.ttf:text='test text':fontcolor='ffffff@1':fontsize=30:x=(w-tw)/2:y=50:alpha='if(lt(t,2),0,if(lt(t,4),(t-2)/2,if(lt(t,24),1,if(lt(t,26),(2-(t-24))/2,0))))'' '-threads' '8' '-vcodec' 'libx264' '-acodec' 'aac' '-max_muxing_queue_size' '400' '-b:v' '1000k' '-refs' '6' '-coder' '1' '-sc_threshold' '40' '-flags' '+loop' '-me_range' '16' '-subq' '7' '-i_qfactor' '0.71' '-qcomp' '0.6' '-qdiff' '4' '-trellis' '1' '-b:a' '256k' '-ac' '2' '-pass' '1' '-passlogfile' '/tmp/ffmpeg-passes5b738244e22e0b38pp/pass-5b738244e2412' '/data/tmp/ffmpeg-ed6a389106090a6a9f9c71c7c357400b-5b738244e2215.mp4'
  
  
  
      2%    2%    4%    6%    8%    10%    12%    14%    14%    16%    18%    18%    20%    22%    22%    24%    26%    28%    30%    30%    32%    34%    34%    36%    38%    40%    42%    44%    44%    46%    48%
  
  
  
  ffmpeg '-y' '-i' 'video/second_vid.mp4' '-filter_complex' '[0:v]drawtext=fontfile=/usr/share/fonts/truetype/msttcorefonts/arial.ttf:text='test text':fontcolor='ffffff@1':fontsize=30:x=(w-tw)/2:y=50:alpha='if(lt(t,2),0,if(lt(t,4),(t-2)/2,if(lt(t,24),1,if(lt(t,26),(2-(t-24))/2,0))))'' '-threads' '8' '-vcodec' 'libx264' '-acodec' 'aac' '-max_muxing_queue_size' '400' '-b:v' '1000k' '-refs' '6' '-coder' '1' '-sc_threshold' '40' '-flags' '+loop' '-me_range' '16' '-subq' '7' '-i_qfactor' '0.71' '-qcomp' '0.6' '-qdiff' '4' '-trellis' '1' '-b:a' '256k' '-ac' '2' '-pass' '2' '-passlogfile' '/tmp/ffmpeg-passes5b738244e22e0b38pp/pass-5b738244e2412' '/data/tmp/ffmpeg-ed6a389106090a6a9f9c71c7c357400b-5b738244e2215.mp4'
  
  
  
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  ffmpeg '-y' '-f' 'concat' '-safe' '0' '-i' '/data/tmp/ffmpeg-concat-5b73814f9fe10' '-c' 'copy' 'video_out/done_vid.mp4'

  (For some reason it seems to run the encoding of each video command again at 50%)

  So when I play ffmpeg-ed6a389106090a6a9f9c71c7c357400b-5b738244e2215.mp4, the text is in there, but when I play the output file (done_vid.mp4), the text isn’t there.

  What’s going on ?

  UPDATE : Here are the ffprobes of the 2 temp files in case they help :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'data/tmp/ffmpeg-7a580007c010377da19305b0836e7a4d-5b73814f9ff35.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.83.100
  
    Duration: 00:02:25.17, start: 0.000000, bitrate: 1247 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 999 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 242 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  
  
  
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'data/tmp/ffmpeg-ed6a389106090a6a9f9c71c7c357400b-5b738244e2215.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.83.100
  
    Duration: 00:01:30.03, start: 0.000000, bitrate: 322 kb/s
  
      Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 1280x720 [SAR 1:1 DAR 16:9], 61 kb/s, 23.98 fps, 23.98 tbr, 19184 tbn, 47.96 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 258 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler

• FFmpeg remove 2 sec from middle of video and concat the parts. Single line solution

  15 janvier 2019, par Aaron Broderick

  I have a video file that is 22 seconds long.
  I want to remove the segment from 10 seconds to 12 seconds.
  Then return a concatenated video file of seconds 1-10 and 12-22.

  I want to do this in a single FFmpeg command.

  This is the easy way

  Source
  https://www.labnol.org/internet/useful-ffmpeg-commands/28490/

  ffmpeg -i input.mp4 -ss 00:00:00.0 -codec copy -t 10 output_1.mp4

  and

  ffmpeg -i input.mp4 -ss 00:00:12.0 -codec copy -t 10 output_2.mp4

  then create an input file with all the source file names and run

  ffmpeg -f concat -i file-list.txt -c copy output.mp4

  But I’m looking for a one line solution

  Any help would be appreciated.

• FFMPEG : concat demuxer errors during execution

  1er novembre 2015, par lgaravaglia

  I’m trying to use the FFMPEG concat demuxer to create a "loop" of a single video.

  I first tried running this command :

  ffmpeg -f concat -i behzad.txt -c:v copy output_concat.avi

  My input text file is as follows :

  file 'G:\Masters_Thesis_Files\Honda_Database\Database1\Training\videos\behzad\behzad.avi'
  
  file 'G:\Masters_Thesis_Files\Honda_Database\Database1\Training\videos\behzad\behzad.avi'

  The input file is in raw format.

  After running the command I get the following output to the console and the video generated is just the first frame of my input video file.

  ffmpeg version N-74286-ge5774f2 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.3 (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-libbs2b --enable-libcaca --
  
  enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
  
  ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
  
  le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
  
  able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
  
  ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
  
   --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
  
  e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
  
  ble-decklink --enable-zlib
  
    libavutil      54. 30.100 / 54. 30.100
  
    libavcodec     56. 57.100 / 56. 57.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 32.100 /  5. 32.100
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, concat, from 'behzad.txt':
  
    Duration: N/A, start: 0.000001, bitrate: 110806 kb/s
  
      Stream #0:0: Video: rawvideo, bgr24, 640x480, 110806 kb/s, 14.99 fps, 14.99
  
  tbr, 14.99 tbn, 14.99 tbc
  
  File 'output_concat.avi' already exists. Overwrite ? [y/N] y
  
  Output #0, avi, to 'output_concat.avi':
  
    Metadata:
  
      ISFT            : Lavf56.40.101
  
      Stream #0:0: Video: rawvideo, bgr24, 640x480, q=2-31, 110806 kb/s, 14.99 fps
  
  , 14.99 tbr, 14.99 tbn, 14.99 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  [avi @ 0000000004723360] Non-monotonous DTS in output stream 0:0; previous: 1186
  
  24821151886176, current: 118624821151886176; changing to 118624821151886177. Thi
  
  s may result in incorrect timestamps in the output file.
  
  [avi @ 0000000004723360] Too large number of skipped frames 118624821151886176 >
  
   60000
  
  av_interleaved_write_frame(): Invalid argument
  
  [avi @ 0000000004723360] Too large number of skipped frames 118624821151886176 >
  
   60000
  
  frame=    2 fps=0.0 q=-1.0 Lsize=     906kB time=-00:00:00.00 bitrate=N/A
  
  video:1800kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing
  
  overhead: unknown
  
  Conversion failed!

  I also tried to run the command with the codec set to h264, rather than just copying the codec. When I ran this command the output to the console still had the DTS errors, however, my output video contained the entire input video rather than just the first frame. It did not repeat the video like I expect.

  I should also specify, I’m running these commands in Windows using the latest version of Zeranoe FFMPEG.

  I’m still relatively inexperienced with FFMPEG, is there some part of the process that I’m doing wrong ?