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• ffmpeg x11grab Fedora 22 cannot open display [on hold]

  4 août 2015, par voor

  Running a fairly recent version of Fedora 22 :

  Linux localhost 4.1.3-200.fc22.x86_64 #1 SMP Wed Jul 22 19:51:58 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

  Dual screen Acer XB270HU and AOC 2369. Also uses NVIDIA Drivers :

  ➜  ~  rpm -qa | grep nvidia
  
  nvidia-driver-libs-352.30-1.fc22.x86_64
  
  nvidia-driver-352.30-1.fc22.x86_64
  
  nvidia-settings-352.30-1.fc22.x86_64
  
  nvidia-libXNVCtrl-352.30-1.fc22.x86_64
  
  dkms-nvidia-352.30-1.fc22.x86_64
  
  nvidia-driver-libs-352.30-1.fc22.i686

  Whenever I attempt to do a x11grab in ffmpeg I get an error :

  ➜  ~  ffmpeg -f x11grab -r 15 -s 1920x1080 -i :0 -vcodec h264 -crf 30 -y output.mp4
  
  ffmpeg version 2.6.3 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 5.1.1 (GCC) 20150422 (Red Hat 5.1.1-1)
  
    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 -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-frei0r --enable-gnutls --enable-ladspa --enable-libass --enable-libcdio --enable-libdc1394 --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopencv --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvpx --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. 20.100 / 54. 20.100
  
    libavcodec     56. 26.100 / 56. 26.100
  
    libavformat    56. 25.101 / 56. 25.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.102 /  5. 11.102
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Invalid MIT-MAGIC-COOKIE-1 key[x11grab @ 0x1fe1d40] Cannot open display :0, error 1.
  
  :0: Input/output error

  I’ve tried a few different commands basically copy/pasta from the web on how to do screengrabs. I don’t need audio, just video, and all of them result in the same error.

  I am able to do xwininfo without any problems :

  ➜  ~  xwininfo    
  
  
  
  xwininfo: Please select the window about which you
  
            would like information by clicking the
  
            mouse in that window.
  
  
  
  xwininfo: Window id: 0x1e0006c "linux - ffmpeg x11grab Fedora 22 cannot open display - Stack Overflow - Google Chrome"
  
  
  
    Absolute upper-left X:  0
  
    Absolute upper-left Y:  27
  
    Relative upper-left X:  0
  
    Relative upper-left Y:  27
  
    Width: 2560
  
    Height: 1413
  
    Depth: 24
  
    Visual: 0x21
  
    Visual Class: TrueColor
  
    Border width: 0
  
    Class: InputOutput
  
    Colormap: 0x20 (installed)
  
    Bit Gravity State: ForgetGravity
  
    Window Gravity State: NorthWestGravity
  
    Backing Store State: NotUseful
  
    Save Under State: no
  
    Map State: IsViewable
  
    Override Redirect State: no
  
    Corners:  +0+27  -1920+27  -1920-0  0
  
    -geometry 2560x14130

• ffmpeg m4a/m4b/mp4 output file's "Time" value is incorrect when read into iTunes

  2 juin 2019, par PistoletPierre

  I’m using ffmpeg to convert audiobooks to m4a/m4b/mp4. All seems to work until trying to play them in iTunes. It plays in VLC, QuickTime, and MacOS’s Quicklook without issue.

  "So why are you posting here ? This isn’t an iTunes forum."

  I’m hoping this is iTunes being picky about file formats and that I can add some magic argument to my ffmpeg command and have it spit out something that iTunes can read.

  Below is the bash function I’m using to do the conversion. I’ve tried m4a/mp4/m4b as values for TEMP_FILE_EXTENSION and tried opening the intermediate file as well. It’s always the same corrupted "Time" value when you put it in iTunes.

  dedrm_audible () {
  
    # Check for AtomicParsley, ffmpeg, and 3 args
  
    if (! type AtomicParsley >/dev/null 2>/dev/null) || (! type ffmpeg >/dev/null 2>/dev/null) || [ ! $# -eq 3 ]; then
  
      echo "Usage:"
  
      echo "    dedrm_audible <path to="to"> <activation bytes="bytes"> <path to="to" output="output" file="file">"
  
      echo "    Note: AtomicParsley and ffmpeg must be in PATH variable"
  
      return
  
    fi
  
    local ORIGINAL_PWD="$(pwd)"
  
    local TEMP_DIR="/tmp/audible"
  
    local AUDIOBOOK_FILE="$1"
  
    local ACTIVATION_BYTES="$2"
  
    local OUTPUT_FILE="$3"
  
    local FULL_AUDIOBOOK_PATH="$(realpath "${AUDIOBOOK_FILE}")"
  
    local OUTPUT_PATH="$(realpath "${OUTPUT_FILE}")"
  
    local TEMP_FILE_EXTENSION="m4a"
  
  
  
    mkdir -p "${TEMP_DIR}"
  
    cd "${TEMP_DIR}"
  
  
  
    # Extract the book cover
  
    ffmpeg -activation_bytes "${ACTIVATION_BYTES}" -i "${FULL_AUDIOBOOK_PATH}" -vcodec copy artwork.png
  
    # Convert the audio
  
    ffmpeg -activation_bytes "${ACTIVATION_BYTES}" -i "${FULL_AUDIOBOOK_PATH}" -vn -c:a copy -v debug output.${TEMP_FILE_EXTENSION}
  
    # Add the cover to the new file
  
    AtomicParsley output.${TEMP_FILE_EXTENSION} --artwork artwork.png --overWrite
  
  
  
    # Put it where you want it and clean up
  
    cp output.${TEMP_FILE_EXTENSION} "${OUTPUT_PATH}"
  
    rm artwork.png
  
    rm output.${TEMP_FILE_EXTENSION}
  
    cd "${ORIGINAL_PWD}"
  
  }
  
  </path></activation></path>

  It goes off without a hitch. The new file is there waiting for me, with all the metadata including the cover when I do a "Get Info" or "Quick look" on it (I’m on MacOS). But when opening it and trying to play it in iTunes, the "time" field is way off and it immediately skips to the next song/audiobook in the queue.

  Attempts to convert it within iTunes fail immediately - too quickly to see what’s happening. The errors in the console simply say "Assert failure :" (with nothing after the colon).

  edit : Tommy answered the question. Here’s a working bash function :

  dedrm_audible () {
  
    # Check for AtomicParsley, ffmpeg, and 3 args
  
    if (! type AtomicParsley >/dev/null 2>/dev/null) || (! type ffmpeg >/dev/null 2>/dev/null) || [ ! $# -eq 3 ]; then
  
      echo "Usage:"
  
      echo "    dedrm_audible <path to="to"> <activation bytes="bytes"> <path to="to" output="output" file="file">"
  
      echo "    Note: AtomicParsley and ffmpeg must be in PATH variable"
  
      return
  
    fi
  
    local ORIGINAL_PWD="$(pwd)"
  
    local TEMP_DIR="/tmp/audible"
  
    local AUDIOBOOK_FILE="$1"
  
    local ACTIVATION_BYTES="$2"
  
    local OUTPUT_FILE="$3"
  
    # Alternative to realpath (since I read somewhere that it's not there by default on some systems): OUTPUT_PATH="$( cd "$( dirname "$OUTPUT_FILE" )" &amp;&amp; pwd )"
  
    local FULL_AUDIOBOOK_PATH="$(realpath "${AUDIOBOOK_FILE}")"
  
    local AUDIOBOOK_NAME="${$(basename "${FULL_AUDIOBOOK_PATH}")%.aax}.m4a"
  
    local OUTPUT_PATH="$(realpath "${OUTPUT_FILE}")"
  
    local TEMP_FILE_EXTENSION="m4a"
  
  
  
    mkdir -p "${TEMP_DIR}"
  
    cd "${TEMP_DIR}"
  
  
  
    cp "${FULL_AUDIOBOOK_PATH}" "${AUDIOBOOK_NAME}"
  
  
  
    # Extract the book cover
  
    ffmpeg -activation_bytes "${ACTIVATION_BYTES}" -i "${AUDIOBOOK_NAME}" -vcodec copy artwork.png
  
    # Convert the audio
  
    ffmpeg -activation_bytes "${ACTIVATION_BYTES}" -i "${AUDIOBOOK_NAME}" -vn -c:a copy -v debug output.${TEMP_FILE_EXTENSION}
  
    # Add the cover to the new file
  
    AtomicParsley output.${TEMP_FILE_EXTENSION} --artwork artwork.png --overWrite
  
  
  
    # Put it where you want it and clean up
  
    mv output.${TEMP_FILE_EXTENSION} "${OUTPUT_PATH}"
  
    rm artwork.png
  
    rm "${AUDIOBOOK_NAME}"
  
    cd "${ORIGINAL_PWD}"
  
  }
  
  </path></activation></path>

• How can I compress and create mp4 video file from batch of images on hard disk using ffmpeg ?

  29 juin 2015, par Brubaker Haim

  In my directory I copied ffmpeg.exe to the same directory where all the images are.
  All images are bitmaps.

  Then in the command prompt windows I typed :

  ffmpeg -f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r  out.mp4

  But I get error that there is no a directory name :

  \.\pipe\mytestpipe

  So I removed it and typed the same line without the pipe part.

  ffmpeg -f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i -map 0 -c:v mpeg4 -r  out.mp4

  Now there is no a directory name -map

  So I moved the -map 0

  ffmpeg -f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i -c:v mpeg4 -r  out.mp4

  Now I’m getting error :

  -c:v : Protocol not found

  I used this line with the pipe in my c# program as arguments to ffmpeg using ProcessStartInfo but now I don’t want to use pipes only in the command prompt to type it and compress and create mp4 video file.

  Edit I tried this now :

  ffmpeg -framerate 1/5 -i screenshot%06d.bmp -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4

  And what I get is some errors :

  E:\screenshots>ffmpeg -framerate 1/5 -i screenshot%06d.bmp -c:v libx264 -r 30 -p
  
  ix_fmt yuv420p out.mp4
  
  ffmpeg version N-73165-gf1e1730 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.2 (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. 27.100 / 54. 27.100
  
    libavcodec     56. 45.100 / 56. 45.100
  
    libavformat    56. 38.102 / 56. 38.102
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 18.100 /  5. 18.100
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.100 /  1.  2.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  [bmp @ 0000000002eb7f80] bad magic number
  
      Last message repeated 2 times
  
  [image2 @ 0000000002eb64e0] decoding for stream 0 failed
  
  [image2 @ 0000000002eb64e0] Could not find codec parameters for stream 0 (Video:
  
   bmp, none): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  screenshot%06d.bmp: could not find codec parameters
  
  Input #0, image2, from 'screenshot%06d.bmp':
  
    Duration: 00:07:35.00, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: bmp, none, 0.20 fps, 0.20 tbr, 0.20 tbn, 0.20 tbc
  
  Output #0, mp4, to 'out.mp4':
  
  Output file #0 does not contain any stream

  For those who can see. When i’m doing it on a single file for example : ffmpeg -framerate 1/5 -i screenshot000002.bmp -c:v libx264 -r 30 -pix_fmt yuv420p out1.mp4 or screenshot000003.bmp or screenshot000122.bmp it will work fine and create the video file. But when i’m doing this for all images i’m getting all the errors : ffmpeg -framerate 1/5 -i screenshot%06d.bmp -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4 here is the results when i did on screenshot000002.bmp and it worked fine.

  When i’m doing it on a single image file it’s working fine like screenshot000002.bmp but when doing it on all the images screenshot%06d.bmp it’s giving me all the errors i mentioned above.