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• python ffmpeg moov atom not found Invalid data when processing input

  11 mai 2018, par Isocrates

  I have a progress that records the screen, and audio from a microphone, and then combines the video and audio recording (.mp4 and .wav) into one mkv file.

  I am using python 3.6 and ffmpeg to achieve this aim. For short videos (<20 sec.) it works, but for longer recordings it presents the following error message :

  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x55abb3a52540] moov atom not found
  
  tmp/tmp_0.mp4: Invalid data found when processing input

  Full output :

  ffmpeg version 3.3.7 Copyright (c) 2000-2018 the FFmpeg developers
  
  built with gcc 7 (GCC)
  
  configuration: --prefix=/usr --bindir=/usr/bin -- 
  
  datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg -- 
  
  incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man -- 
  
  arch=x86_64 --optflags='-O2 -g -pipe -Wall -Werror=format-security -Wp, 
  
  -D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp- 
  
  buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat- 
  
  hardened-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables' --extra- 
  
  ldflags='-Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld ' -- 
  
  extra-cflags='-I/usr/include/nvenc ' --enable-libopencore-amrnb -- 
  
  enable- 
  
  libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 --enable-bzlib 
  
  --disable-crystalhd --enable-fontconfig --enable-frei0r --enable-gcrypt -- 
  
  enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable- 
  
  libcdio --enable-indev=jack --enable-libfreetype --enable-libfribidi -- 
  
  enable-libgsm --enable-libmp3lame --enable-nvenc --enable-openal --enable- 
  
  opencl --enable-opengl --enable-libopenjpeg --enable-libopus --enable- 
  
  libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex -- 
  
  enable-libtheora --enable-libvorbis --enable-libv4l2 --enable- libvidstab - 
  
  -enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid -- 
  
  enable-avfilter --enable-avresample --enable-postproc --enable-pthreads -- 
  
  disable-static --enable-shared --enable-gpl --disable-debug --disable- 
  
  stripping --shlibdir=/usr/lib64 --enable-libmfx --enable-runtime-cpudetect
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libavresample   3.  5.  0 /  3.  5.  0
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  [wav @ 0x55abb3a0b880] Ignoring maximum wav data size, file may be invalid
  
  [wav @ 0x55abb3a0b880] Estimating duration from bitrate, this may be 
  
  inaccurate
  
  Guessed Channel Layout for Input Stream #0.0 : stereo
  
  Input #0, wav, from 'tmp/tmp_0.wav':
  
    Metadata:
  
      encoder         : Lavf57.71.100
  
    Duration: 00:00:21.97, bitrate: 768 kb/s
  
  Stream #0:0: Audio: pcm_mulaw ([7][0][0][0] / 0x0007), 48000 Hz, 
  
  stereo, s16, 768 kb/s
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x55abb3a52540] moov atom not found
  
  tmp/tmp_0.mp4: Invalid data found when processing input

  The python file (ffmpeg.py) is as follows. The class, AV_COMPILE, is not yet complete, held up by the aforementioned error, and therefore still uses the initial test files as defaults. But otherwise it ought to work :

  import os, time, glob
  
  
  
  TMP_DIR = "tmp"
  
  DISPLAY = os.environ['DISPLAY']
  
  EXT = {
  
      'Video':'mp4',
  
      'Audio':'wav',
  
      'AV':'mkv',
  
  }
  
  
  
  class ffmpegVideo:
  
  
  
      FFMPEG_BIN = "ffmpeg"
  
      AUDIO = False
  
  
  
      def __init__(self, fps = 30, audio = True):
  
      global TMP_DIR, DISPLAY, EXT
  
  
  
      self.fps = fps
  
  
  
      if audio:
  
          self.AUDIO = True
  
  
  
      self.video_filename = self.unique_filename()
  
  
  
      self.command = [ self.FFMPEG_BIN,
  
          '-video_size', '1920x1080',
  
          '-framerate', str(fps),
  
          '-f', 'x11grab',
  
          '-i', DISPLAY,
  
          '-vcodec', 'libx264',
  
          '-qp', '0',
  
          '-preset', 'ultrafast',
  
          '-y', TMP_DIR + '/' + self.video_filename
  
      ]
  
  
  
  def start(self):
  
      import threading as th
  
  
  
      thread = th.Thread(target=self.record)
  
      thread.start()
  
  
  
  def record(self):
  
      import subprocess as sp
  
  
  
      self.pipe = sp.Popen(self.command, stderr=sp.PIPE)
  
  
  
      if self.AUDIO:
  
          ffmpegAudio().start()
  
  
  
  def stop(self):
  
      self.pipe.terminate()
  
  
  
  def unique_filename(self):
  
      global TMP_DIR, EXT
  
  
  
      i = 0
  
  
  
      while os.path.exists((TMP_DIR + '/' + 'tmp_%s.%s') % (i, EXT['Video'])):
  
          i += 1
  
  
  
      return ('tmp_%s.%s') % (i, EXT['Video'])
  
  
  
  class ffmpegAudio:
  
  
  
      FFMPEG_BIN = "ffmpeg"
  
  
  
      def __init__(self):
  
  
  
          self.audio_filename = self.unique_filename()
  
  
  
          self.command = [ self.FFMPEG_BIN,
  
              '-f', 'pulse',
  
              '-ac', '2',
  
              '-ar', '48000',
  
              '-i', 'default',
  
             '-acodec', 'pcm_mulaw',
  
             '-y', TMP_DIR + '/' + self.audio_filename
  
          ]
  
  
  
      def start(self):
  
          import threading as th
  
  
  
          au_thread = th.Thread(target=self.record)
  
          au_thread.start()
  
  
  
      def record(self):
  
           import subprocess as sp
  
  
  
          self.pipe = sp.Popen(self.command, stderr=sp.PIPE)
  
  
  
      def stop(self):
  
          self.pipe.terminate()
  
  
  
      def unique_filename(self):
  
          global TMP_DIR, EXT
  
  
  
          i = 0
  
  
  
          while os.path.exists((TMP_DIR + '/' + 'tmp_%s.%s') % (i, EXT['Audio'])):
  
          i += 1
  
  
  
          return ('tmp_%s.%s') % (i, EXT['Audio'])
  
  
  
  class AV_COMPILE:
  
  
  
      def __init__(self, au_in = TMP_DIR + '/' + 'out1.wav', vd_in = 
  
  TMP_DIR + '/' + 'test4.mp4', out = TMP_DIR + '/' + 'av.mkv'):
  
          import subprocess as sp
  
  
  
          au_in = min(glob.iglob(TMP_DIR + '/*.wav'), key=os.path.getctime)
  
          vd_in = min(glob.iglob(TMP_DIR + '/*.mp4'), key=os.path.getctime)
  
  
  
          self.command = ('ffmpeg -i %s  -r 30 -i %s -shortest -c:a aac -c:v copy %s') % (au_in, vd_in, out)
  
          sp.call(self.command, shell=True)

  I would be grateful for any assistance you could provide in understanding why this happens and how to solve the error. Also, I am happy to receive any other tips on how to improve this code, or any other problems anyone might notice.

  EDIT :
  I now believe that the reason for this error in longer videos, and occasionally shorter, is that the program is proceeding to attempt to compile the av output whether or not it has finished compiling the original video file. I tested a time.sleep(10) function to delay AV_COMPILE, and this seems to work.

  However, as video files get larger, obviously the delay needs to be adjusted. So I should like to know how I can separately check the integrity of the video file and determine that it is safe to proceed to the next step.

• FFMPEG failing to convert mov to flv

  3 mai 2018, par scripter78

  FFMPEG issue that I am not familiar with. seems to only happen with this particular file. Anyone by any chance can take a look at this long out put and provide any feedback on what might actually be causing this ?

  ffmpeg_18.exe -i "E:\TESTFILES\115637.mov" -vcodec libx264 -b:v 700k -s 720x480 -r 29.97 -pix_fmt yuv420p -vf yadif -aspect 4:3 -acodec libvo_aacenc -b:a 96k -ar 44100 -f mp4 -y "E:\TESTFILES\test\115637.flv"
  
  ffmpeg version N-39877-g4fa706a Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Apr 16 2012 14:53:47 with gcc 4.6.3
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-li
  
  bnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      51. 46.100 / 51. 46.100
  
    libavcodec     54. 14.101 / 54. 14.101
  
    libavformat    54.  3.100 / 54.  3.100
  
    libavdevice    53.  4.100 / 53.  4.100
  
    libavfilter     2. 70.100 /  2. 70.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 11.100 /  0. 11.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'E:\TESTFILES\115637.mov':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 537199360
  
      compatible_brands: qt
  
      creation_time   : 2018-05-03 20:48:28
  
    Duration: 00:00:30.03, start: 0.000000, bitrate: 154663 kb/s
  
      Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080, 151585 kb/s, SAR 1920:1920 DAR 16:9, 29.97 fps, 29.97 tbr, 30k tbn, 60k tbc
  
      Metadata:
  
        creation_time   : 2018-05-03 20:48:28
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:1(eng): Audio: pcm_s16le (lpcm / 0x6D63706C), 48000 Hz, 4 channels, s16, 3072 kb/s
  
      Metadata:
  
        creation_time   : 2018-05-03 20:48:28
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
  
      Metadata:
  
        creation_time   : 2018-05-03 20:51:29
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 00:00:00;00
  
  [buffer @ 035c33a0] w:1920 h:1080 pixfmt:yuv420p tb:1/1000000 sar:1920/1920 sws_param:flags=2
  
  [yadif @ 01e7caa0] mode:0 parity:-1 auto_enable:0
  
  [scale @ 01e7c6a0] w:1920 h:1080 fmt:yuv420p sar:1920/1920 -> w:720 h:480 fmt:yuv420p sar:32/27 flags:0x4
  
  [libx264 @ 035b8c40] using SAR=8/9
  
  [libx264 @ 035b8c40] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX FMA3
  
  [libx264 @ 035b8c40] profile High, level 3.0
  
  [libx264 @ 035b8c40] 264 - core 120 r2164 da19765 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=24 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=abr mbtree=1 bitra
  
  te=700 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [libvo_aacenc @ 01e7bae0] Unable to set encoding parameters
  
  Output #0, mp4, to 'E:\TESTFILES\test\115637.flv':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 537199360
  
      compatible_brands: qt
  
      creation_time   : 2018-05-03 20:48:28
  
      Stream #0:0(eng): Video: h264, yuv420p, 720x480 [SAR 8:9 DAR 4:3], q=-1--1, 700 kb/s, 90k tbn, 29.97 tbc
  
      Metadata:
  
        creation_time   : 2018-05-03 20:48:28
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:1(eng): Audio: aac, 44100 Hz, 4 channels, s16, 96 kb/s
  
      Metadata:
  
        creation_time   : 2018-05-03 20:48:28
  
        handler_name    : Apple Alias Data Handler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (pcm_s16le -> libvo_aacenc)
  
  Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

• Can't read video using VideoCapture in Opencv

  8 mai 2018, par batuman

  I have installed Opencv 2.4.13.6 at my Ubuntu 16.04 OS.
  I have ffmpeg and during Opencv installation I made WITH_FFMPEG ON.
  My ffmpeg is working.
  If I type ffmpeg at command window, I have

  ffmpeg version N-90982-gb995ec0 Copyright (c) 2000-2018 the FFmpeg developers
  
  
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
  
    configuration: --prefix=/home/nyan/ffmpeg_build --enable-shared --extra-cflags=-I/home/nyan/ffmpeg_build/include --extra-ldflags=-L/home/nyan/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/nyan/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree
  
    libavutil      56. 18.100 / 56. 18.100
  
    libavcodec     58. 19.100 / 58. 19.100
  
    libavformat    58. 13.101 / 58. 13.101
  
    libavdevice    58.  4.100 / 58.  4.100
  
    libavfilter     7. 21.100 /  7. 21.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
    libpostproc    55.  2.100 / 55.  2.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  Then I have put ffmpeg paths to .bashrc as

  export PATH=/home/bin${PATH:+:${PATH}}
  
  export PATH=/home/ffmpeg_build${PATH:+:${PATH}}
  
  export PATH=/home/ffmpeg_build/include${PATH:+:${PATH}}
  
  export LD_LIBRARY_PATH=/home/ffmpeg_build/lib${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}

  In my Opencv libraries I have libopencv_video.so. So video input/output should be fine.

  My following program gives me "can't read video". What could be the reason ?

  I tried VideoCapture cap(0); gives me same error. What is wrong ?

  #include <opencv2></opencv2>opencv.hpp>
  
  using namespace cv;
  
  using namespace std;
  
  
  
  int main(void){
  
  
  
      VideoCapture cap("IMG_5715.MOV"); // open the default camera
  
      if(!cap.isOpened())  // check if we succeeded
  
      {
  
          cout &lt;&lt; "can't read video"&lt;&lt; endl;
  
          return -1;
  
      }
  
  
  
      while(1){ 
  
      Mat frame;
  
      // Capture frame-by-frame
  
      cap >> frame;
  
          imshow( "Frame", frame );
  
          waitKey(1);
  
      // If the frame is empty, break immediately
  
      if (frame.empty())
  
         break; 
  
      }
  
  
  
      cap.release();
  
      return 0;
  
  }