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• How to Write ffmpeg code according to video data

  26 avril 2020, par Tevfik

  Format                      : MPEG-4
Format profile              : Base Media / Version 2
Codec ID                    : mp42 (isom/mp42)
File size                   : 337 MiB
Duration                    : 1 h 23 min
Overall bit rate mode       : Variable
Overall bit rate            : 562 kb/s
Encoded date                : UTC 2020-04-23 00:22:37
Tagged date                 : UTC 2020-04-23 00:22:37
gsst                        : 0
gstd                        : 5034271

Video
ID                          : 1
Format                      : AVC
Format/Info                 : Advanced Video Codec
Format profile              : Main@L3.1
Format settings             : CABAC / 3 Ref Frames
Format settings, CABAC      : Yes
Format settings, Reference  : 3 frames
Codec ID                    : avc1
Codec ID/Info               : Advanced Video Coding
Duration                    : 1 h 23 min
Bit rate                    : 431 kb/s
Width                       : 1 280 pixels
Height                      : 720 pixels
Display aspect ratio        : 16:9
Frame rate mode             : Constant
Frame rate                  : 23.976 (24000/1001) FPS
Color space                 : YUV
Chroma subsampling          : 4:2:0
Bit depth                   : 8 bits
Scan type                   : Progressive
Bits/(Pixel*Frame)          : 0.019
Stream size                 : 258 MiB (77%)
Title                       : ISO Media file produced by Google Inc. Created on: 04/22/2020.
Writing library             : x264 core 155 r2901 7d0ff22
Encoded date                : UTC 2020-04-23 00:22:37
Tagged date                 : UTC 2020-04-23 00:22:37
Color range                 : Limited
Color primaries             : BT.709
Transfer characteristics    : BT.709
Matrix coefficients         : BT.709
Codec configuration box     : avcC

Audio
ID                          : 2
Format                      : AAC LC
Format/Info                 : Advanced Audio Codec Low Complexity
Codec ID                    : mp4a-40-2
Duration                    : 1 h 23 min
Bit rate mode               : Variable
Bit rate                    : 128 kb/s
Channel(s)                  : 2 channels
Channel layout              : L R
Sampling rate               : 44.1 kHz
Frame rate                  : 43.066 FPS (1024 SPF)
Compression mode            : Lossy
Stream size                 : 76.8 MiB (23%)
Title                       : ISO Media file produced by Google Inc. Created on: 04/22/2020.
Encoded date                : UTC 2020-04-23 00:22:37
Tagged date                 : UTC 2020-04-23 00:22:37


  



  I have these information and I want to get same results with ffmpeg. What should I do ? What codes do I have to use ?

  



  Thanks in advance...

  


• no audio after mp3 + jpg with ffmpeg

  31 octobre 2019, par YongJiang Zhang

  I have a mp3 file. I checked. It has audio. After run command

  ffmpeg -i 31.mp3 -i cover.jpg -c:a copy -s 1280x720 -pix_fmt yuv420p 31.mp4

  I got 31.mp4 but it has no audio.

  I use macbook pro and ffmpeg version 4.1

• 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>