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ffmpeg - how to split a .aac audio-file into small parts, exactly 4.00 seconds in size (so ignoring keyframes)



2019 Community Moderator ElectionSplit video file into pieces with ffmpegHow to demux audio and know what type it is?How to input a network file to ffmpegFFmpeg - Split video multiple partsHow to set default subtitle with ffmpegHow to re-encode file A.mp4 with the same settings as B.mp4?FFMPEG glue MPEG TStrim video files via audio track informationPartially replace video stream while preserving audio streamHow to extract the “stored frames” without rely on fps?










0















How can I split the audio file .aac into small parts of exactly 4.0 seconds, ie. with ignoring keyframes?



The original video file was in .mp4 format. From this video file I got an .aac audio file. But the new parts of the split audio file always have 3.4 seconds and I need 4.0 seconds of audio. The problem is probably in key frames.



Thanks.



cd $DIR_IN
for file in *.mp4
do
echo "Extracting the whole audio-track from $file to $DIR_TMP/$file%.mp4.aac"
ffmpeg -i "$file" -vn -acodec copy $DIR_TMP/"$file%.mp4.aac"

echo "Splitting the large video-file $file to a smaller audio-files '$file%.mp4'XXX.aac"
ffmpeg -i $DIR_TMP/"$file%.mp4.aac" -c copy -f segment -segment_time 4 $DIR_TMP/"$file%.mp4%03d.aac"

rm -f $DIR_TMP/"$file%.mp4.aac"
done









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    0















    How can I split the audio file .aac into small parts of exactly 4.0 seconds, ie. with ignoring keyframes?



    The original video file was in .mp4 format. From this video file I got an .aac audio file. But the new parts of the split audio file always have 3.4 seconds and I need 4.0 seconds of audio. The problem is probably in key frames.



    Thanks.



    cd $DIR_IN
    for file in *.mp4
    do
    echo "Extracting the whole audio-track from $file to $DIR_TMP/$file%.mp4.aac"
    ffmpeg -i "$file" -vn -acodec copy $DIR_TMP/"$file%.mp4.aac"

    echo "Splitting the large video-file $file to a smaller audio-files '$file%.mp4'XXX.aac"
    ffmpeg -i $DIR_TMP/"$file%.mp4.aac" -c copy -f segment -segment_time 4 $DIR_TMP/"$file%.mp4%03d.aac"

    rm -f $DIR_TMP/"$file%.mp4.aac"
    done









    share|improve this question







    New contributor




    s3n0 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






















      0












      0








      0








      How can I split the audio file .aac into small parts of exactly 4.0 seconds, ie. with ignoring keyframes?



      The original video file was in .mp4 format. From this video file I got an .aac audio file. But the new parts of the split audio file always have 3.4 seconds and I need 4.0 seconds of audio. The problem is probably in key frames.



      Thanks.



      cd $DIR_IN
      for file in *.mp4
      do
      echo "Extracting the whole audio-track from $file to $DIR_TMP/$file%.mp4.aac"
      ffmpeg -i "$file" -vn -acodec copy $DIR_TMP/"$file%.mp4.aac"

      echo "Splitting the large video-file $file to a smaller audio-files '$file%.mp4'XXX.aac"
      ffmpeg -i $DIR_TMP/"$file%.mp4.aac" -c copy -f segment -segment_time 4 $DIR_TMP/"$file%.mp4%03d.aac"

      rm -f $DIR_TMP/"$file%.mp4.aac"
      done









      share|improve this question







      New contributor




      s3n0 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      How can I split the audio file .aac into small parts of exactly 4.0 seconds, ie. with ignoring keyframes?



      The original video file was in .mp4 format. From this video file I got an .aac audio file. But the new parts of the split audio file always have 3.4 seconds and I need 4.0 seconds of audio. The problem is probably in key frames.



      Thanks.



      cd $DIR_IN
      for file in *.mp4
      do
      echo "Extracting the whole audio-track from $file to $DIR_TMP/$file%.mp4.aac"
      ffmpeg -i "$file" -vn -acodec copy $DIR_TMP/"$file%.mp4.aac"

      echo "Splitting the large video-file $file to a smaller audio-files '$file%.mp4'XXX.aac"
      ffmpeg -i $DIR_TMP/"$file%.mp4.aac" -c copy -f segment -segment_time 4 $DIR_TMP/"$file%.mp4%03d.aac"

      rm -f $DIR_TMP/"$file%.mp4.aac"
      done






      bash ffmpeg






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