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• 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.

  


• ffmpeg how to determine the size of the image and stretch the video to fit it ?

  11 décembre 2020, par Артем

  I want to automatically detect the size of the image and stretch the video to fit it.
  
I have images of different sizes.
  
There is a video with a green background one size.
  
I remove the chromakey and overlay the image.
  
But I have a problem, my video is of a different size.
  
Me need to automatically expand or contract it to the size of the image.
  

  


  @echo off
setlocal EnableDelayedExpansion
color a
set a=Your_files\*.jpg
set aa=Your_files\*.mp4
set b="Result\%%~na.mp4"
set c=ffmpeg
set f=-filter_complex "[1:v]chromakey=0x00D700:0.1:0.3[ckout];[0:v][ckout]overlay=(W-w)/1:(H-h)/1[o]" -map [o] -map 1:a -c:a copy
for %%s in (%aa%) do !set aud="%%s"!
for %%a in (%a%) do (%c% -y -i "%%a" -i %aud% %f% %b%)
exit


  


  Help me please
  

  


  Bad idea.. Images can be of different formats. (there will be distortion)
  

  


  


  Me only one thing comes to my mind.
  
Separately resize the image.
  
Separately resize the video.
  
And then work with them...