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• Concat video too long ffmpeg

  18 mars 2019, par Reckless Velociraptor

  I have similar problem to this guy After merge videos, the duration is too long - ffmpeg but I have no idea how to make videos same format
  1 video :

  >     Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'outputhigh.mp4':   Metadata:
  
  >     major_brand     : isom
  
  >     minor_version   : 512
  
  >     compatible_brands: isomiso2avc1mp41
  
  >     encoder         : Lavf58.10.100   Duration: 00:03:14.96, start: 0.000000, bitrate: 110 kb/s
  
  >     Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), y uvj444p(pc), 816x456 [SAR 1:1 DAR 34:19], 108 kb/s, 25
  
  > fps, 25 tbr, 12800 tbn, 5 0 tbc (default)
  
  >     Metadata:
  
  >       handler_name    : VideoHandler

  2 video :

  >  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'fireplace.mp4':   Metadata:
  
  >     major_brand     : mp42
  
  >     minor_version   : 0
  
  >     compatible_brands: isommp42
  
  >     creation_time   : 2018-12-11T15:34:07.000000Z   Duration: 00:17:45.00, start: 0.000000, bitrate: 1632 kb/s
  
  >     Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709) , 1280x720 [SAR 1:1 DAR 16:9], 1499 kb/s, 29.97
  
  > fps, 29.97 tbr, 30k tbn, 59.94 t bc (default)
  
  >     Metadata:
  
  >       creation_time   : 2018-12-11T15:34:07.000000Z
  
  >       handler_name    : ISO Media file produced by Google Inc. Created on: 12/11 /2018.
  
  >     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, flt p, 128 kb/s (default)
  
  >     Metadata:
  
  >       creation_time   : 2018-12-11T15:34:07.000000Z
  
  >       handler_name    : ISO Media file produced by Google Inc. Created on: 12/11 /2018.

• ffmpeg library take long encoding time

  11 février 2019, par robinson george

  I am making an android app in which user can insert a images and its turned into a video. I tried making a video over the photos(selected by user) with replacing green colour in video using ffmpeg library. But the results are not very satisfying and it’s take around 4-5 seconds to encode a video of around 15 seconds. There are already many apps present in play store but i was wondering how they achieved this effect in so much lesser time(like < 1 sec to encode 15 sec video).
  For reference - https://play.google.com/store/apps/details?id=com.yy.biu
  https://play.google.com/store/apps/details?id=com.newbiz.mvmaster

  You can have a look at the result output file here- http://www.yourfilelink.com/get.php?fid=1881360

• FFmpeg : Documented method of changing frame rate not working

  5 février 2019, par Chirag Arora

  According to the FFmpeg documentation over here, I can change frame rate of a video using :

  ffmpeg -i input.mkv -c:v copy -vsync drop -r 59.94 output.mkv

  but all I am getting is an av_interleaved_write_frame(): Invalid argument error on my machine. What am I doing wrong ?

  Here is the log :

  ffmpeg -i noaudio.mp4 -c:v copy -vsync drop -r 160 lapse.mp4
  
  
  
  ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1_1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gpl --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-opencl --enable-videotoolbox
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'noaudio.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.20.100
  
    Duration: 00:12:31.45, start: 0.000000, bitrate: 59950 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 3840x2160 [SAR 1:1 DAR 16:9], 59948 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  File 'lapse.mp4' already exists. Overwrite ? [y/N] y
  
  Output #0, mp4, to 'lapse.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.20.100
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 3840x2160 [SAR 1:1 DAR 16:9], q=2-31, 59948 kb/s, 29.97 fps, 29.97 tbr, 10240 tbn, 160 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  [mp4 @ 0x7fec5400e000] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
  av_interleaved_write_frame(): Invalid argument
  
  frame=    1 fps=0.0 q=-1.0 Lsize=       0kB time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  video:794kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Conversion failed!