Writing a find command with ffmpeg to process videos












1















I want to write a command or script to find all my .mkv videos larger than 3Gb, then run ffmpeg to make them smaller (720p) and change the extension to mp4. I have it working except the file ends up with .mkv.mp4 extension.



I'm also sure there is probably a much better way of doing this, such as with a script. Here is what I have come up with: 



find '/home/username/Videos/' -type f -size +3G -exec ffmpeg -i "{}" -c:v libx264 -c:a copy -acodec copy -vf scale="trunc(oh*a/2)*2:720" -preset superfast -crf 24 -b:v 400k "{}.mp4" ;


I would also like to have the output files to a directory like /home/username/Videos/Changed, and then delete the original .mkv.



Can anyone help teach me the best method to do this?






command-line scripts video ffmpeg find







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    1















    I want to write a command or script to find all my .mkv videos larger than 3Gb, then run ffmpeg to make them smaller (720p) and change the extension to mp4. I have it working except the file ends up with .mkv.mp4 extension.



    I'm also sure there is probably a much better way of doing this, such as with a script. Here is what I have come up with: 



    find '/home/username/Videos/' -type f -size +3G -exec ffmpeg -i "{}" -c:v libx264 -c:a copy -acodec copy -vf scale="trunc(oh*a/2)*2:720" -preset superfast -crf 24 -b:v 400k "{}.mp4" ;


    I would also like to have the output files to a directory like /home/username/Videos/Changed, and then delete the original .mkv.



    Can anyone help teach me the best method to do this?






    command-line scripts video ffmpeg find







    share|improve this question

























      1












      1








      1








      I want to write a command or script to find all my .mkv videos larger than 3Gb, then run ffmpeg to make them smaller (720p) and change the extension to mp4. I have it working except the file ends up with .mkv.mp4 extension.



      I'm also sure there is probably a much better way of doing this, such as with a script. Here is what I have come up with: 



      find '/home/username/Videos/' -type f -size +3G -exec ffmpeg -i "{}" -c:v libx264 -c:a copy -acodec copy -vf scale="trunc(oh*a/2)*2:720" -preset superfast -crf 24 -b:v 400k "{}.mp4" ;


      I would also like to have the output files to a directory like /home/username/Videos/Changed, and then delete the original .mkv.



      Can anyone help teach me the best method to do this?






      command-line scripts video ffmpeg find







      share|improve this question














      I want to write a command or script to find all my .mkv videos larger than 3Gb, then run ffmpeg to make them smaller (720p) and change the extension to mp4. I have it working except the file ends up with .mkv.mp4 extension.



      I'm also sure there is probably a much better way of doing this, such as with a script. Here is what I have come up with: 



      find '/home/username/Videos/' -type f -size +3G -exec ffmpeg -i "{}" -c:v libx264 -c:a copy -acodec copy -vf scale="trunc(oh*a/2)*2:720" -preset superfast -crf 24 -b:v 400k "{}.mp4" ;


      I would also like to have the output files to a directory like /home/username/Videos/Changed, and then delete the original .mkv.



      Can anyone help teach me the best method to do this?






      command-line scripts video ffmpeg find




      command-line scripts video ffmpeg find






      share|improve this question













      share|improve this question











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      share|improve this question










      asked Jan 21 at 23:18









      ticotexasticotexas

      386




      386






















          1 Answer
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          IMHO, the "Good" way to do this is to break it into two steps:




          1. Find the big files.

          2. "Fix" them.


          And, I'd put step 2 into a bash script, stored in /home/username/bin/fixvideos



          My find command would then look like: 



          find '/home/username/Videos/' -type f -name '*.mkv' -size +3G -print0 |
          
    xargs -0 --no-run-if-empty /home/username/fixvideos


          and, the script in /home/username/fixvideos is something like: 



          #!/bin/bash
          
# handle "-v" or "--verbose" as optional 1st parameter, the rest are "*.mkv" files
          
# which will be rescaled and converted to ".mp4", using ffmpeg
          
declare -i verbose=0
          
#
          
if [[ "$1" = "-v" ]] || [[ "$1" = "--verbose" ]] ; then
          
    verbose=1
          
    shift
          
fi
          

          
while  [[ $# -ne 0 ]]  ; do
          
    # the base name, without the extension
          
    bname="${1//.mkv}"
          
    oname="$bname.mkv"
          
    if [[ $verbose -ne 0 ]] ; then
          
       echo "Reading $1, writing $oname" >&2
          
    fi
          
    ffmpeg -i "$1" -c:v libx264 -c:a copy -acodec copy 
          
       -vf scale="trunc(oh*a/2)*2:720" -preset superfast 
          
       -crf 24 -b:v 400k "$oname"
          
    #
          
    # shift all the filenames down so the next file is actually next
          
    shift
          
done
          
exit 0





          share|improve this answer


























          • Thanks @waltinator! It's great. It will take me some time to learn exactly how it works. I changed this line oname="$bname.mkv" to oname="$bname.mp4" and it worked. How can I have it save the new .mp4s to a different folder, like /home/username/Videos/Changed?

            – ticotexas
            Jan 22 at 19:43













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          1 Answer
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          active

          oldest

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          1 Answer
          1






          active

          oldest

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          active

          oldest

          votes






          active

          oldest

          votes









          0














          IMHO, the "Good" way to do this is to break it into two steps:




          1. Find the big files.

          2. "Fix" them.


          And, I'd put step 2 into a bash script, stored in /home/username/bin/fixvideos



          My find command would then look like: 



          find '/home/username/Videos/' -type f -name '*.mkv' -size +3G -print0 |
          
    xargs -0 --no-run-if-empty /home/username/fixvideos


          and, the script in /home/username/fixvideos is something like: 



          #!/bin/bash
          
# handle "-v" or "--verbose" as optional 1st parameter, the rest are "*.mkv" files
          
# which will be rescaled and converted to ".mp4", using ffmpeg
          
declare -i verbose=0
          
#
          
if [[ "$1" = "-v" ]] || [[ "$1" = "--verbose" ]] ; then
          
    verbose=1
          
    shift
          
fi
          

          
while  [[ $# -ne 0 ]]  ; do
          
    # the base name, without the extension
          
    bname="${1//.mkv}"
          
    oname="$bname.mkv"
          
    if [[ $verbose -ne 0 ]] ; then
          
       echo "Reading $1, writing $oname" >&2
          
    fi
          
    ffmpeg -i "$1" -c:v libx264 -c:a copy -acodec copy 
          
       -vf scale="trunc(oh*a/2)*2:720" -preset superfast 
          
       -crf 24 -b:v 400k "$oname"
          
    #
          
    # shift all the filenames down so the next file is actually next
          
    shift
          
done
          
exit 0





          share|improve this answer


























          • Thanks @waltinator! It's great. It will take me some time to learn exactly how it works. I changed this line oname="$bname.mkv" to oname="$bname.mp4" and it worked. How can I have it save the new .mp4s to a different folder, like /home/username/Videos/Changed?

            – ticotexas
            Jan 22 at 19:43


















          0














          IMHO, the "Good" way to do this is to break it into two steps:




          1. Find the big files.

          2. "Fix" them.


          And, I'd put step 2 into a bash script, stored in /home/username/bin/fixvideos



          My find command would then look like: 



          find '/home/username/Videos/' -type f -name '*.mkv' -size +3G -print0 |
          
    xargs -0 --no-run-if-empty /home/username/fixvideos


          and, the script in /home/username/fixvideos is something like: 



          #!/bin/bash
          
# handle "-v" or "--verbose" as optional 1st parameter, the rest are "*.mkv" files
          
# which will be rescaled and converted to ".mp4", using ffmpeg
          
declare -i verbose=0
          
#
          
if [[ "$1" = "-v" ]] || [[ "$1" = "--verbose" ]] ; then
          
    verbose=1
          
    shift
          
fi
          

          
while  [[ $# -ne 0 ]]  ; do
          
    # the base name, without the extension
          
    bname="${1//.mkv}"
          
    oname="$bname.mkv"
          
    if [[ $verbose -ne 0 ]] ; then
          
       echo "Reading $1, writing $oname" >&2
          
    fi
          
    ffmpeg -i "$1" -c:v libx264 -c:a copy -acodec copy 
          
       -vf scale="trunc(oh*a/2)*2:720" -preset superfast 
          
       -crf 24 -b:v 400k "$oname"
          
    #
          
    # shift all the filenames down so the next file is actually next
          
    shift
          
done
          
exit 0





          share|improve this answer


























          • Thanks @waltinator! It's great. It will take me some time to learn exactly how it works. I changed this line oname="$bname.mkv" to oname="$bname.mp4" and it worked. How can I have it save the new .mp4s to a different folder, like /home/username/Videos/Changed?

            – ticotexas
            Jan 22 at 19:43
















          0












          0








          0







          IMHO, the "Good" way to do this is to break it into two steps:




          1. Find the big files.

          2. "Fix" them.


          And, I'd put step 2 into a bash script, stored in /home/username/bin/fixvideos



          My find command would then look like: 



          find '/home/username/Videos/' -type f -name '*.mkv' -size +3G -print0 |
          
    xargs -0 --no-run-if-empty /home/username/fixvideos


          and, the script in /home/username/fixvideos is something like: 



          #!/bin/bash
          
# handle "-v" or "--verbose" as optional 1st parameter, the rest are "*.mkv" files
          
# which will be rescaled and converted to ".mp4", using ffmpeg
          
declare -i verbose=0
          
#
          
if [[ "$1" = "-v" ]] || [[ "$1" = "--verbose" ]] ; then
          
    verbose=1
          
    shift
          
fi
          

          
while  [[ $# -ne 0 ]]  ; do
          
    # the base name, without the extension
          
    bname="${1//.mkv}"
          
    oname="$bname.mkv"
          
    if [[ $verbose -ne 0 ]] ; then
          
       echo "Reading $1, writing $oname" >&2
          
    fi
          
    ffmpeg -i "$1" -c:v libx264 -c:a copy -acodec copy 
          
       -vf scale="trunc(oh*a/2)*2:720" -preset superfast 
          
       -crf 24 -b:v 400k "$oname"
          
    #
          
    # shift all the filenames down so the next file is actually next
          
    shift
          
done
          
exit 0





          share|improve this answer















          IMHO, the "Good" way to do this is to break it into two steps:




          1. Find the big files.

          2. "Fix" them.


          And, I'd put step 2 into a bash script, stored in /home/username/bin/fixvideos



          My find command would then look like: 



          find '/home/username/Videos/' -type f -name '*.mkv' -size +3G -print0 |
          
    xargs -0 --no-run-if-empty /home/username/fixvideos


          and, the script in /home/username/fixvideos is something like: 



          #!/bin/bash
          
# handle "-v" or "--verbose" as optional 1st parameter, the rest are "*.mkv" files
          
# which will be rescaled and converted to ".mp4", using ffmpeg
          
declare -i verbose=0
          
#
          
if [[ "$1" = "-v" ]] || [[ "$1" = "--verbose" ]] ; then
          
    verbose=1
          
    shift
          
fi
          

          
while  [[ $# -ne 0 ]]  ; do
          
    # the base name, without the extension
          
    bname="${1//.mkv}"
          
    oname="$bname.mkv"
          
    if [[ $verbose -ne 0 ]] ; then
          
       echo "Reading $1, writing $oname" >&2
          
    fi
          
    ffmpeg -i "$1" -c:v libx264 -c:a copy -acodec copy 
          
       -vf scale="trunc(oh*a/2)*2:720" -preset superfast 
          
       -crf 24 -b:v 400k "$oname"
          
    #
          
    # shift all the filenames down so the next file is actually next
          
    shift
          
done
          
exit 0






          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Jan 22 at 6:04

























          answered Jan 22 at 5:58









          waltinatorwaltinator

          22.6k74169




          22.6k74169













          • Thanks @waltinator! It's great. It will take me some time to learn exactly how it works. I changed this line oname="$bname.mkv" to oname="$bname.mp4" and it worked. How can I have it save the new .mp4s to a different folder, like /home/username/Videos/Changed?

            – ticotexas
            Jan 22 at 19:43





















          • Thanks @waltinator! It's great. It will take me some time to learn exactly how it works. I changed this line oname="$bname.mkv" to oname="$bname.mp4" and it worked. How can I have it save the new .mp4s to a different folder, like /home/username/Videos/Changed?

            – ticotexas
            Jan 22 at 19:43



















          Thanks @waltinator! It's great. It will take me some time to learn exactly how it works. I changed this line oname="$bname.mkv" to oname="$bname.mp4" and it worked. How can I have it save the new .mp4s to a different folder, like /home/username/Videos/Changed?

          – ticotexas
          Jan 22 at 19:43







          Thanks @waltinator! It's great. It will take me some time to learn exactly how it works. I changed this line oname="$bname.mkv" to oname="$bname.mp4" and it worked. How can I have it save the new .mp4s to a different folder, like /home/username/Videos/Changed?

          – ticotexas
          Jan 22 at 19:43




















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