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• How do we determine the required dependencies for ffmpeg

  15 mars 2021, par user3656901

  I've installed ffmpeg on ubuntu. I am going to copy the compiled ffmpeg and required dependencies to a directory and copy that directory to another machine. This way we can run ffmpeg on another machine without installation. How do we determine the required dependencies to copy ? Saw instruction on this page : https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu, but it didn't explain the required dependencies for ffmpeg.

  


  When I used ldd ffmpeg, I got something like :

  


      linux-vdso.so.1 (0x00007fffe20fd000)
    libavdevice.so.58 => /lib/x86_64-linux-gnu/libavdevice.so.58 (0x00007fc116e90000)
    libavfilter.so.7 => /lib/x86_64-linux-gnu/libavfilter.so.7 (0x00007fc116b10000)
    libavformat.so.58 => /lib/x86_64-linux-gnu/libavformat.so.58 (0x00007fc116890000)
    libavcodec.so.58 => /lib/x86_64-linux-gnu/libavcodec.so.58 (0x00007fc1152d0000)
    libavresample.so.4 => /lib/x86_64-linux-gnu/libavresample.so.4 (0x00007fc1152a0000)
    libpostproc.so.55 => /lib/x86_64-linux-gnu/libpostproc.so.55 (0x00007fc115270000)


  


  Are those the required dependencies ? It didn't list the files under bin, include or share folders.

  


• How to determine WxH of video using ffprobe java android studio

  15 février 2021, par sara bensarghin

  I'm trying to concatenate two videos on Android. I would like to know how to work with ffprobe to determine WxH of the first video and scaling the second video to the resolution of the first video.

  


          a(new String[]{"-y",
                        "-ss",
                        String.valueOf(this.m),
                        "-t",
                        String.valueOf(this.a),
                        "-i",
                        (String) FileUtils.myUri.get(0),
                        "-ss",
                        String.valueOf(this.n),
                        "-t",
                        String.valueOf(this.b),
                        "-i",
                        (String) FileUtils.myUri.get(1),
                        "-strict",
                        "experimental",
                        "-filter_complex",
                        "[0:v]scale=320x240," +
                                "setsar=1:1[v0];[1:v]scale=320x240,setsar=1:1[v1];[v0][v1] concat=n=2:v=1",
                        "-ab",
                        "48000",
                        "-ac",
                        "2",
                        "-ar",
                        "22050",
                        "-s",
                        "320x240",
                        "-r",
                        "15",
                        "-b",
                        "2097k",
                        "-vcodec",
                        "mpeg4",
                        this.d},
                this.d);
    }



  


• Determine if FFmpeg ran successfully [duplicate]

  31 janvier 2021, par Spedwards

  I have a script I've been using to transcode videos from h264 to h265 in order to preserve space. A lot of manual effort is required to go through and delete the larger files (not always the h264 version). If I was able to determine whether or not FFmpeg finished successfully, I'd be able to save myself a lot of time.

  


  I'll cut out a lot of stuff that's not relevant to the question but below you'll find my script.

  


  function transcode() {
    output=$(echo "$1" | sed -r 's/^(.+)(\.\w{3})$/\1.h265\2/g');
    ffmpeg # a lot of options (including -hide_banner and -loglevel panic)
    echo "$output";
}

RESET=$(tput sgr0);
YELLOW=$(tput setaf 3);
CYAN=$(tput setaf 6);

for f in *.mp4; do
    original=$(stat -c %s "$f");
    echo "${YELLOW}Transcoding file: ${CYAN}$f${RESET}";
    new_file_name=$(transcode "$f");
    new_file_size=$(stat -c %s "$new_file_name");
    if [[ "$new_file_size" -gt "$original" ]]; then
        rm "$new_file_name";
    fi
    echo "";
done;


  


  Ideally, I'd like to delete the original source file if the transcoded file is smaller and FFmpeg ran successfully. Unfortunately due to various reasons FFmpeg can fail while transcoding.

  


  I have seen a few questions asking similar stuff but implementing it is just going over my head. I can't really be creating text files with the output either (though I guess that can be cleaned up as it goes).

  


  Any help would be greatly appreciated.