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• Multiple trims to a video using ffmpeg generating video with shorter duration than expected [closed]

  9 septembre 2024, par Gerardo

  I have an application that given a video it trims multiple parts of that video using ffmpeg. Each part is cropped, scaled and then concatenated to generate a single video.

  


  To share an example, I have a video of 1 minute and 44 seconds of duration and 60 fps. My goal is to trim 3 parts of the video :

  


  

  • First one between seconds 0 to 44.666

  


  • Second one between seconds 44.666 to 74.349

  


  • Third one between seconds 74.349 to 103.985

  


  


  The ffmpeg command I use to achieve that is the following one :

  


  ffmpeg -y -hide_banner -i bg_720_1280.png -i error.mp4 -filter_complex "
[1:v]trim=0.0:44.666,setpts=PTS-STARTPTS,crop=405.0:720.0:437.5:0.0,scale=-2:1280.0[crop_1_0_v];
[1:a]atrim=0.0:44.666,volume=1.0,asetpts=PTS-STARTPTS[crop_1_0_a];
[0:v][crop_1_0_v]overlay=enable='between(t,0,44.666)':x=0.0:y=0.0[crop_1_0_v];
[1:v]trim=44.666:74.349,setpts=PTS-STARTPTS,crop=405.0:720.0:437.5:0.0,scale=-2:1280.0[crop_2_0_v];
[1:a]atrim=44.666:74.349,volume=1.0,asetpts=PTS-STARTPTS[crop_2_0_a];
[0:v][crop_2_0_v]overlay=enable='between(t,0,29.683)':x=0.0:y=0.0[crop_2_0_v];
[1:v]trim=74.349:103.985,setpts=PTS-STARTPTS,crop=405.0:720.0:437.5:0.0,scale=-2:1280.0[crop_3_0_v];
[1:a]atrim=74.349:103.985,volume=1.0,asetpts=PTS-STARTPTS[crop_3_0_a];
[0:v][crop_3_0_v]overlay=enable='between(t,0,29.636)':x=0.0:y=0.0[crop_3_0_v];
[crop_1_0_a][crop_2_0_a][crop_3_0_a]concat=n=3:v=0:a=1[a];
[crop_1_0_v][crop_2_0_v][crop_3_0_v]concat=n=3:v=1:a=0[outv];
[a]amix=1:duration=longest[outa]" -map "[outv]" -map "[outa]" -vcodec libx264 -acodec aac -sws_flags lanczos -pix_fmt yuv420p -crf 17 -preset superfast -r 60 test.mp4


  


  Running this command it generates a video of 11 seconds of duration and I'm unable to understand it. What is wrong with the command ? Also I'm open to recommendations of the ffmpeg command in case you find another way more efficient or performant.

  


  I'm using the following FFMPEG version :

  


  ffmpeg version 7.0.2 Copyright (c) 2000-2024 the FFmpeg developers
  built with Apple clang version 15.0.0 (clang-1500.3.9.4)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/7.0.2 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags='-Wl,-ld_classic' --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libharfbuzz --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox
  libavutil      59.  8.100 / 59.  8.100
  libavcodec     61.  3.100 / 61.  3.100
  libavformat    61.  1.100 / 61.  1.100
  libavdevice    61.  1.100 / 61.  1.100
  libavfilter    10.  1.100 / 10.  1.100
  libswscale      8.  1.100 /  8.  1.100
  libswresample   5.  1.100 /  5.  1.100
  libpostproc    58.  1.100 / 58.  1.100


  


  But I got the same issue with static ffmpeg builds

  


  The file bg_720_1280.png is just a transparent image of resolution 720x1280. I think I could achieve the same by using nullsrc filter with that resolution instead of using this background image.

  


• Generate special file list

  11 novembre 2020, par michel

  How can I get a list like this in bash :
I have to create a list like this and then concatenate the files for ffmpeg.

  


  ls -l stream
-rw-r - r-- 1 root root 0 Nov 9 20:30 Il.Gatto.Nero.2019.mp4
-rw-r - r-- 1 root root 0 Nov 9 20:30 My.Name.2019.mp4
-rw-r - r-- 1 root root 0 Nov 9 20:30 Terminator.2019.mp4
-rw-r - r-- 1 root root 0 Nov 9 20:30 spot-Il.Gatto.Nero.2019.mp4
-rw-r - r-- 1 root root 0 Nov 9 20:30 spot-My.Name.2019.mp4
-rw-r - r-- 1 root root 0 Nov 9 20:30 spot-Terminator.2019.mp4

i need to create a txt file like this:

file '/stream/spot-Il.Gatto.Nero.2019.mp4'
file '/stream/Il.Gatto.Nero.2019.mp4'
file '/stream/spot-Terminator.2019.mp4'
file '/stream/Terminator.2019.mp4'
file '/stream/spot-My.Name.2019.mp4'
file '/stream/My.Name.2019.mp4'
file ..........



ls -l | awk {'print "file \047/data/"$9 "\047" '} | awk NF
file '/data/'
file '/data/Il.Gatto.Nero.2019.mp4'
file '/data/Il.Mio.Nome.2019.mp4'
file '/data/Terminator.2019.mp4'
file '/data/spot-Il.Gatto.Nero.2019.mp4'
file '/data/spot-Il.Mio.Nome.2019.mp4'
file '/data/spot-Terminator.2019.mp4'


  


  Greetings Mich

  


  in php have write this :

  


  <?php
$db_host = 'localhost';
$db_name = 'genlist';
$db_user = '********';
$db_pass = '********';
$conn = mysqli_connect($db_host, $db_user, $db_pass);

if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
} else {
//echo "Connected successfully";
}
mysqli_select_db($conn,$db_name) or die ("Error select db: " . mysqli_error());

$sql = "SELECT * FROM tb_movie ORDER BY RAND()";
$query = mysqli_query($conn,$sql);

while($result = mysqli_fetch_assoc($query)) {

$data = "file '/data/EagleCinema/CinemaDramaNew/stream/" . $result['spot']  . "'"."\n";
$data .= "file '/data/EagleCinema/CinemaDramaNew/stream/" . $result['movie'] . "'"."\n";

file_put_contents('/var/www/html/random-cinema-drama.txt', $data, FILE_APPEND );

}


?>


  


  php result :

  


  file '/data/EagleCinema/CinemaDramaNew/stream/spot-Demolition.-.Amare.E.Vivere.2015.mp4'
file '/data/EagleCinema/CinemaDramaNew/stream/Demolition.-.Amare.E.Vivere.2015.mp4'
file '/data/EagleCinema/CinemaDramaNew/stream/spot-Una.Giusta.Causa.2018.mp4'
file '/data/EagleCinema/CinemaDramaNew/stream/Una.Giusta.Causa.2018.mp4'
file '/data/EagleCinema/CinemaDramaNew/stream/spot-Io.Prima.Di.Te.2016.mp4'
file '/data/EagleCinema/CinemaDramaNew/stream/Io.Prima.Di.Te.2016.mp4'
file '/data/EagleCinema/CinemaDramaNew/stream/spot-A.Beautiful.Day.2017.mp4'
file '/data/EagleCinema/CinemaDramaNew/stream/A.Beautiful.Day.2017.mp4'
file '/data/EagleCinema/CinemaDramaNew/stream/spot-Un.Improbabile.Amicizia.2019.mp4'
file '/data/EagleCinema/CinemaDramaNew/stream/Un.Improbabile.Amicizia.2019.mp4'
file '/data/EagleCinema/CinemaDramaNew/stream/spot-The.Intervention.2016.mp4'
file '/data/EagleCinema/CinemaDramaNew/stream/The.Intervention.2016.mp4'


  


  ...

  


  i need same result but with bash script no DB, only scan ffrom directory the file and generate the list.

  


• doc/libav-merge : add skipped fixup commits to the list of missing changes

  13 novembre 2016, par Hendrik Leppkes

  doc/libav-merge : add skipped fixup commits to the list of missing changes
  

  • [DH] doc/libav-merge.txt