Cutting the videos based on start and end time using ffmpeg

Question

I tried to cut the video using the start and end time of the video by using the following command   ffmpeg -ss 00 00 03 -t 00 00 08 -i movie mp4 -acodec copy -vcodec copy -async 1 cut mp4   By using the above command i want to cut the video from 00 00 03 to 00 00 08  But it is not cutting the video between those times instead of that it is cutting the video with first 11 seconds  can anyone help me how resolve this   Edit 1   I have tried to cut by using the following command which is suggested by mark4o  ffmpeg -i movie mp4 -ss 00 00 03 -t 00 00 08 -async 1 cut mp4   But it was shown the following error   the encoder  aac  is experimental but experimental codecs are not enabled  so i added the -strict -2 into the command i e    ffmpeg -i movie mp4 -ss 00 00 03 -t 00 00 08 -async 1 -strict -2 cut mp4   Now it is working fine

User · Answer

Use -to instead of -t  -to specifies the end time  -t specifies the duration

User · Answer

new answer  fast  You can make bash do the math for you  and it works with milliseconds  toSeconds         awk -F   NF  3   print   1   3600      2   60     3   NF  2   print   1   60     2   NF  1   print 0    1     lt  lt  lt   1    StartSeconds   toSeconds  quot 45 5 quot   EndSeconds   toSeconds  quot 1 00 5 quot   Duration   bc  lt  lt  lt   quot    EndSeconds    0 01  -   StartSeconds  quot    awk    printf  quot   4f quot    0     ffmpeg -ss  StartSeconds -i input mpg -t  Duration output mpg  This  like the old answer  will produce a 15 second clip  This method is ideal even when clipping from deep within a large file because seeking isn t disabled  unlike the old answer  And yes  I ve verified it s frame perfect  NOTE  The start-time is INCLUSIVE and the end-time is normally EXCLUSIVE  hence the  0 01  to make it inclusive  If you use mpv you can enable millisecond timecodes in the OSD with --osd-fractions  old answer with explanation  slow  To cut based on start and end time from the source video and avoid having to do math  specify the end time as the input option and the start time as the output option  ffmpeg -t 1 00 -i input mpg -ss 45 output mpg  This will produce a 15 second cut from 0 45 to 1 00  This is because when -ss is given as an output option  the discarded time is still included in the total time read from the input  which -t uses to know when to stop  Whereas if -ss is given as an input option  the start time is seeked and not counted  which is where the confusion comes from  It s slower than seeking since the omitted segment is still processed before being discarded  but this is the only way to do it as far as I know  If you re clipping from deep within a large file  it s more prudent to just do the math and use -ss for the input

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Even though I m 6 years late  but I think all the answers above didn t properly address the question  kalai is asking  The bash script below will process a text file in the following format   URL   start time   end time   filename   for example   https   www youtube com watch v iUDURCrvrMI 00 02 02 00 03 41 1   and loop through the file  downloads the file that youtube-dl supports  calculating duration between start time and end time and passing it to ffmpeg  since -t is actually the duration  not the real end time  Hit me up if you have any question       for i in    lt video txt       do         URL  echo  i   cut -d     -f 1           START  echo  i   cut -d     -f 2           END  echo  i   cut -d     -f 3           FILE  echo  i   cut -d     -f 4            SEC1  echo  START   sed  s        s     60  g    bc          SEC2  echo  END   sed  s        s     60  g    bc           DIFFSEC  expr   SEC2  -   SEC1            ffmpeg   youtube-dl -g  URL   sed  s    -ss  START -i  amp     -t  DIFFSEC -c copy  FILE  mkv           ffmpeg -i  FILE  mkv  -f mp3 -ab 192000 -vn  FILE  mp3           rm  FILE  mkv       done

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feel free to use this tool https   github com rooty0 ffmpeg video cutter I wrote awhile ago Pretty much that s cli front-end for ffmpeg    you just need to create a yaml what you want to cut out    something like this cut method  delete    we re going to delete following video fragments from a video timeframe    - from  start     waiting for people to join the conference     to  4m   - from  10m11s    awkward silence     to  15m50s   - from  30m5s     Off-Topic Discussion     to  end  and then just run a tool to get result

User · Answer

Here s what I use and will only take a few seconds to run  ffmpeg -i input mp4 -ss 01 19 27 -to 02 18 51 -c v copy -c a copy output mp4  Reference  https   www arj no 2018 05 18 trimvideo  Generated mp4 files could also be used in iMovie  More info related to get the full duration using get duration input video  modele   If you want to concatenate multiple cut scenes you can use following Python script     usr bin env python3  import subprocess   def get duration input video       cmd     quot ffprobe quot    quot -i quot   input video   quot -show entries quot    quot format duration quot               quot -v quot    quot quiet quot    quot -sexagesimal quot    quot -of quot    quot csv p 0 quot       return subprocess check output cmd  decode  quot utf-8 quot   strip     if   name       quot   main   quot       name    quot input mkv quot       times          times append   quot 00 00 00 quot    quot 00 00 10 quot        times append   quot 00 06 00 quot    quot 00 07 00 quot           times      quot 00 00 00 quot   get duration name         if len times     1          time   times 0          cmd     quot ffmpeg quot    quot -i quot   name   quot -ss quot   time 0    quot -to quot   time 1    quot -c v quot    quot copy quot    quot -c a quot    quot copy quot    quot output mp4 quot           subprocess check output cmd      else          open  concatenate txt    w   close           for idx  time in enumerate times               output filename   f quot output idx  mp4 quot              cmd     quot ffmpeg quot    quot -i quot   name   quot -ss quot   time 0    quot -to quot   time 1    quot -c v quot    quot copy quot    quot -c a quot    quot copy quot   output filename              subprocess check output cmd               with open  quot concatenate txt quot    quot a quot   as myfile                  myfile write f quot file  output filename  n quot            cmd     quot ffmpeg quot    quot -f quot    quot concat quot    quot -i quot    quot concatenate txt quot    quot -c quot    quot copy quot    quot output mp4 quot           output   subprocess check output cmd  decode  quot utf-8 quot   strip     Example script will cut and merge scenes in between 00 00 00 - 00 00 10 and 00 06 00 - 00 07 00   If you want to cut the complete video  in case if you want to convert mkv format into mp4  just uncomment the following line    times      quot 00 00 00 quot   get duration name

User · Answer

Try using this  It is the fastest and best ffmpeg-way I have figure it out   ffmpeg -ss 00 01 00 -i input mp4 -to 00 02 00 -c copy output mp4  This command trims your video in seconds  Explanation of the command   -i  This specifies the input file  In that case  it is  input mp4     -ss  Used with -i  this seeks in the input file  input mp4  to position   00 01 00  This is the time your trimmed video will start with   -to  This specifies duration from start  00 01 40  to end  00 02 12   00 02 00  This is the time your trimmed video will end with   -c copy  This is an option to trim via stream copy   NB  Very fast    The timing format is  hh mm ss Please note that the current highly upvoted answer is outdated and the trim would be extremely slow  For more information  look at this official ffmpeg article

User · Answer

ffmpeg -i movie mp4 -vf trim 3 8 cut mp4   Drop everything except from second 3 to second 8

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ffmpeg -i movie mp4 -ss 00 00 03 -t 00 00 08 -async 1 -c copy cut mp4    Use -c copy for make in instantly  In that case ffmpeg will not re-encode video  just will cut to according size

User · Answer

You probably do not have a keyframe at the 3 second mark   Because non-keyframes encode differences from other frames  they require all of the data starting with the previous keyframe   With the mp4 container it is possible to cut at a non-keyframe without re-encoding using an edit list   In other words  if the closest keyframe before 3s is at 0s then it will copy the video starting at 0s and use an edit list to tell the player to start playing 3 seconds in   If you are using the latest ffmpeg from git master it will do this using an edit list when invoked using the command that you provided   If this is not working for you then you are probably either using an older version of ffmpeg  or your player does not support edit lists   Some players will ignore the edit list and always play all of the media in the file from beginning to end   If you want to cut precisely starting at a non-keyframe and want it to play starting at the desired point on a player that does not support edit lists  or want to ensure that the cut portion is not actually in the output file  for example if it contains confidential information   then you can do that by re-encoding so that there will be a keyframe precisely at the desired start time   Re-encoding is the default if you do not specify copy   For example   ffmpeg -i movie mp4 -ss 00 00 03 -t 00 00 08 -async 1 cut mp4   When re-encoding you may also wish to include additional quality-related options or a particular AAC encoder   For details  see ffmpeg s x264 Encoding Guide for video and AAC Encoding Guide for audio   Also  the -t option specifies a duration  not an end time   The above command will encode 8s of video starting at 3s   To start at 3s and end at 8s use -t 5   If you are using a current version of ffmpeg you can also replace -t with -to in the above command to end at the specified time

[linux] Cutting the videos based on start and end time using ffmpeg

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