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• Determining the original recording date of a video file

  10 novembre 2022, par mkyle

  I received a video file that I am trying to determine when the video was originally recorded. The file is a .mov video that is muxed with an audio file. The EXIF data shows multiple creation/modification dates which I recognize as the dates that the file was saved to my local computer, but the last creation date shown is from an earlier date that is adjusted to Eastern Time (UTC -4), which I believe may be the date the file was originally recorded. However, for that earliest creation date, it shows Lavf58.20.100 as the Encoder tag which I am unsure if that earlier creation date is just the date the video file was muxed or if it is in fact the date the video was originally recorded.

  


  I used exiftool v. 12.44 to view the EXIF data from the video and attempted to validate the results against other known video and image files. In doing so, the last creation dates displayed on my known files were consistent with the dates the original files were recorded, however, they lacked the Lavf58.20.100 Encoder tag. I ran additional files that were muxed using FFMPEG, which show the Lavf Encoder tag, but those files did not return Creation Dates. Included is the screen capture of the EXIF data from the .mov file I am trying to determine its original recording date.

  


  

  


• fluent-ffmpeg is having trouble setting creation_time (metadata) for mp4 video

  26 février 2023, par LycalopX

  So, basically, I have 2000 photos/videos that are, incorrectly, saved with random creation dates, and I wish to try and organize them. And, the solution I found was : getting the correct time through their name (they are already all named correctly), in the following format :

  


  YYMMDD HH:MM:SS
  

  


  That way, as I didn't want to go one by one writing all of the correct timestamps, I tried to change the metadata for all the files using javascript, and chose Fluent-FFMPeg for the job. I have ffmpeg installed on my computer, and I can successfully change the date of an MP4 file using the following command, in Windows Powershell (for that mp4 video) :

  


  ffmpeg -i 20150408_143303.mp4 -metadata creation_time="2015-05-08T17:33:03.000Z" newFile.mp4

  

  


  But, the code I wrote doesn't seem to work, at least to change the date of the file. I tested most of the metadata fields (author, title, etc.), and it seems to work fine with them, just not the Media Creation Date (creation_time).

  


  Here is the code, for reference :

  


      // node-module
    var ffmpeg = require('fluent-ffmpeg');

    // File location
    const filePath = './'
    var fileName = "20150408_143303.mp4"


    var year = fileName.slice(0, 4)
    var month = fileName.slice(4, 6)
    var day = fileName.slice(6, 8)
    var hours = fileName.slice(9, 11)
    var minutes = fileName.slice(11, 13)
    var seconds = fileName.slice(13, 15)

    var date = new Date(year, month, day, hours, minutes, seconds)

    //2015-05-08T17:33:03.000Z
    console.log(date)


    // First try (doesn't work)
    const file = filePath + fileName
    ffmpeg(file).inputOptions(`-metadata`, `title="Movie"`)


    // ffmpeg -i 20150408_143303.mp4 -metadata creation_time="2015-05-08T17:33:03.000Z" newFile.mp4

    // second try
    ffmpeg.ffprobe(file, function(err, metadata) {

        ffmpeg(file)
        .inputFormat('mp4')
        .outputOptions([`-metadata`, `creation_time=${date}`])
        .save('newFile.mp4')
        .on("progress", function(progress) {
            console.log("Processing: " + progress.timemark);
          })
          .on("error", function(err, stdout, stderr) {
            console.log("Cannot process video: " + err.message);
          })
          .on("end", function(stdout, stderr) {
            console.log((metadata.format.tags))
          })
        .run();

    })


  


  Console.log : https://imgur.com/a/gR93xLE

  There are no console errors, and everything seems to run smoothly, but the creation_time really does not change. Any idea as to why this is occurring is very welcome...

  


• lavfi/vf_libplacebo : switch to pl_queue-based design

  5 mai 2023, par Niklas Haas

  lavfi/vf_libplacebo : switch to pl_queue-based design
  This does not leverage any immediate benefits, but refactors and
  
  prepares the codebase for upcoming changes, which will include the
  
  ability to do deinterlacing and resampling (frame mixing).
  

  • [DH] libavfilter/vf_libplacebo.c