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• MP3 files created using FFmpeg are not starting playback in browser immediately. Is there any major difference between FFmpeg and AVCONV ?

  23 janvier 2019, par AR5

  I am working on a website that streams music. We recently changed server from Debian (with avconv) to a Centos7 (with FFmpeg) server.
  The mp3 files created on Debian server start playback on browser (I have tested Chrome and Firefox) start almost at the same time they start loading into the browser (I used Network tab on Developer Tools to monitor this)

  Now after the switch to Centos/FFmpeg server, the files being created on this new server are displaying a strange behavior. They only start playback after about 1MB is loaded into the browser.

  I have used identical settings for converting original file into MP3 in both AVCONV and FFmpeg but the files created using FFmpeg are showing this issue. Is there something that might be causing such an issue ? Are there differences in terms of audio conversion between AVCONV and FFmpeg ?

  I have already tried

  I first found that the files created on old server (Debian/Avconv) were VBR (variable bitrate) and the ones created on new server were CBR (constant bitrate), so I tried switching to VBR but the issue still persisted.

  I checked the mp3 files using MediaInfo app and there seems to be no difference between the files.

  I also checked if both files were being served as 206 Partial Content and they both are indeed.

  I am trying to create mp3 files using FFmpeg that work exactly like the ones created before using avconv

  I am trying to make the streaming site work on the new server but the mp3 files created using FFmpeg are not playing back correctly as compared to the ones created on the old server. I am trying to figure out what I might be doing wrong ? or if there is a difference between avconv and FFmpeg that is causing this issue.

  I am really stuck on this issue, any help will be really appreciated.

  ---

  Edit

  I don’t have access to old server anymore so I couldn’t retrieve the log output of avconv. The command that I was using was as follows :

  avconv -y -i "/test/Track 01.mp3" -ac 2 -ar 44100 -acodec libmp3lame -b:a 128k "/test/Track 01 (converted).mp3"

  Here is the command and log output from new server :

  ffmpeg -y -i "/test/Track 01.mp3" -ac 2 -ar 44100 -acodec libmp3lame -b:a 128k "/test/Track 01 (converted).mp3"
  
  ffmpeg version 2.8.15 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-28)
  
    configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --extra-ldflags='-Wl,-z,relro ' --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 --enable-bzlib --disable-crystalhd --enable-gnutls --enable-ladspa --enable-libass --enable-libcdio --enable-libdc1394 --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libx264 --enable-libx265 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
  
    libavutil      54. 31.100 / 54. 31.100
  
    libavcodec     56. 60.100 / 56. 60.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 40.101 /  5. 40.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  [mp3 @ 0xd60be0] Skipping 0 bytes of junk at 240044.
  
  Input #0, mp3, from '/test/Track 01.mp3':
  
    Metadata:
  
      album           : Future Hndrxx Presents: The WIZRD
  
      artist          : Future
  
      genre           : Hip-Hop
  
      title           : Never Stop
  
      track           : 1
  
      lyrics-eng      : rgf.is
  
      WEB SITE        : rgf.is
  
      TAGGINGTIME     : rgf.is
  
      WEB             : rgf.is
  
      date            : 2019
  
      encoder         : Lavf56.40.101
  
    Duration: 00:04:51.40, start: 0.025056, bitrate: 121 kb/s
  
      Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 114 kb/s
  
      Metadata:
  
        encoder         : Lavc56.60
  
      Stream #0:1: Video: png, rgb24(pc), 333x333 [SAR 1:1 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
  
      Metadata:
  
        comment         : Cover (front)
  
  [mp3 @ 0xd66ec0] Frame rate very high for a muxer not efficiently supporting it.
  
  Please consider specifying a lower framerate, a different muxer or -vsync 2
  
  Output #0, mp3, to '/test/Track 01 (converted).mp3':
  
    Metadata:
  
      TALB            : Future Hndrxx Presents: The WIZRD
  
      TPE1            : Future
  
      TCON            : Hip-Hop
  
      TIT2            : Never Stop
  
      TRCK            : 1
  
      lyrics-eng      : rgf.is
  
      WEB SITE        : rgf.is
  
      TAGGINGTIME     : rgf.is
  
      WEB             : rgf.is
  
      TDRC            : 2019
  
      TSSE            : Lavf56.40.101
  
      Stream #0:0: Video: png, rgb24, 333x333 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
  
      Metadata:
  
        comment         : Cover (front)
  
        encoder         : Lavc56.60.100 png
  
      Stream #0:1: Audio: mp3 (libmp3lame), 44100 Hz, stereo, s16p, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc56.60.100 libmp3lame
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (png (native) -> png (native))
  
    Stream #0:0 -> #0:1 (mp3 (native) -> mp3 (libmp3lame))
  
  Press [q] to stop, [?] for help
  
  [libmp3lame @ 0xd9b0c0] Trying to remove 1152 samples, but the queue is emptys/s
  
  frame=    1 fps=0.1 q=-0.0 Lsize=    4788kB time=00:04:51.39 bitrate= 134.6kbits/s
  
  video:234kB audio:4553kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.014809%

  Samples of MP3 files

  I have uploaded samples of mp3 files created using both avconv and FFmpeg. Please find these here : https://drive.google.com/drive/folders/1gRTmMM2iSK0VWQ4Zaf_iBNQe5laFJl08?usp=sharing

• Timestamp not printed on thumbnails with FFMPEG

  26 août 2021, par mlatelcom

  I have a script using FFMPEG to generate an image with tiled thumbnails every 45 seconds for several videos on a given folder. The images are named with the name of the video it was generated from. It generates the thumbnails for each video but it does not print the time stamps on them. The path to the font file is correct ; so I don't know where the issue is. I'm using the script in Fedora Linux.

  


  Here is the FFMPEG command line code on the script :

  


   ffmpeg -ss 00:00:05 -i test.mp4 -loglevel 40 -frames 1 -bt 20M -vf "drawtext=fontfile=/usr/share/fonts/open-sans/OpenSans-Light.ttf:timecode='00\\:00\\:00\\:00':r=30:fontcolor=white:x=220:y=220:box=1:boxcolor=black@0.5,select=not(mod(n\,1350)),scale=200:150,tile=15x48" -n "${name}.png"


  


  and this is the console output

  


  ffmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 11 (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 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection' --extra-ldflags='-Wl,-z,relro -Wl,--as-needed -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld ' --extra-cflags=' -I/usr/include/rav1e' --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-libaom --enable-libdav1d --enable-libass --enable-libbluray --enable-libcdio --enable-libdrm --enable-libjack --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librav1e --enable-libsmbclient --enable-version3 --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-version3 --enable-vapoursynth --enable-libvpx --enable-vulkan --enable-libglslang --enable-libx264 --enable-libx265 --enable-libxvid --enable-libxml2 --enable-libzimg --enable-libzvbi --enable-lv2 --enable-avfilter --enable-avresample --enable-libmodplug --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-lto --enable-libmfx --enable-runtime-cpudetect
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
[h264 @ 0x56051b4b3cc0] Reinit context to 1280x720, pix_fmt: yuv420p
[mpegts @ 0x56051b4acc80] max_analyze_duration 5000000 reached at 5000000 microseconds st:0
Input #0, mpegts, from 'test.mp4':
  Duration: 00:04:57.02, start: 1.400000, bitrate: 2853 kb/s
  Program 1 
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
  Stream #0:0[0x100]: Video: h264 (Main), 1 reference frame ([27][0][0][0] / 0x001B), yuv420p(progressive, left), 1280x720 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 60 tbc
  Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 96 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> png (native))
Press [q] to stop, [?] for help
[h264 @ 0x56051ba69e00] Reinit context to 1280x720, pix_fmt: yuv420p
[Parsed_scale_2 @ 0x56051b5953c0] w:200 h:150 flags:'bicubic' interl:0
[graph 0 input from stream 0:0 @ 0x56051b725ac0] w:1280 h:720 pixfmt:yuv420p tb:1/90000 fr:30/1 sar:1/1
[Parsed_scale_2 @ 0x56051b5953c0] w:1280 h:720 fmt:yuv420p sar:1/1 -> w:200 h:150 fmt:rgb24 sar:4/3 flags:0x4
Output #0, image2, to '.png':
  Metadata:
    encoder         : Lavf58.76.100
  Stream #0:0: Video: png, 1 reference frame, rgb24(pc, progressive, left), 3000x7200 (0x0) [SAR 4:3 DAR 5:9], q=2-31, 200 kb/s, 0.04 fps, 0.04 tbn
    Metadata:
      encoder         : Lavc58.134.100 png
No more output streams to write to, finishing.00.00 bitrate=N/A speed=   0x    
[AVIOContext @ 0x56051b84c8c0] Statistics: 0 seeks, 2 writeouts
frame=    1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:24.00 bitrate=N/A speed=0.47x    
video:465kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Input file #0 (test.mp4):
  Input stream #0:0 (video): 8761 packets read (96159422 bytes); 8760 frames decoded; 
  Input stream #0:1 (audio): 0 packets read (0 bytes); 
  Total: 8761 packets (96159422 bytes) demuxed
Output file #0 (.png):
  Output stream #0:0 (video): 1 frames encoded; 1 packets muxed (476224 bytes); 
  Total: 1 packets (476224 bytes) muxed
[AVIOContext @ 0x56051b4b5d00] Statistics: 107090352 bytes read, 18 seeks


  


• 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.