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• Trim video length in Android with javacv and ffmpeg

  11 juillet 2017, par Morya Yaroslav

  I’m trying to trim video length with ffmpeg implementation of FrameGrabber and FrameRecorder, but getting corrupted file of smaller size then it’s going to be. Maybe there is other way to trim video from start time to end time, also updating trim progress. Seems like it’s not recording changes between frames. Maybe there are some other ways to trim videos of different formats like mp4, flv and others. Here is code snippet :

          FrameGrabber grabber = new FFmpegFrameGrabber(mClip.getPath());
  
          grabber.start();
  
          grabber.setTimestamp(mClip.getClipStartMs()); // Write from specific moment
  
  
  
          File out = new File(mClip.getOutPutPath(params[0])); // Set destination to write
  
          FrameRecorder recorder = new FFmpegFrameRecorder(out, grabber.getImageWidth(), grabber.getImageHeight());
  
  
  
  
  
          recorder.setFormat(grabber.getFormat());
  
          recorder.setFrameRate(grabber.getFrameRate());
  
          recorder.setSampleRate(grabber.getSampleRate());
  
          recorder.setAspectRatio(grabber.getAspectRatio());
  
          recorder.setSampleFormat(grabber.getSampleFormat());
  
  
  
          recorder.setAudioCodec(grabber.getAudioCodec());
  
          recorder.setAudioBitrate(grabber.getAudioBitrate());
  
          recorder.setAudioChannels(grabber.getAudioChannels());
  
  
  
          recorder.setVideoCodec(grabber.getVideoCodec());
  
          recorder.setVideoBitrate(grabber.getVideoBitrate());
  
  
  
          recorder.start();
  
  
  
          Frame frame;
  
          Long timestamp;
  
          Long fullLength = mClip.getClipEndMs() - mClip.getClipStartMs();
  
          double percent = 0d, oldPercent = 0d;
  
  
  
          while ((frame = grabber.grabFrame()) != null && (timestamp = grabber.getTimestamp()) <= mClip.getClipEndMs()) {
  
              Log.d(ASYNC_SAVE_TAG, "Started command : ffmpeg " + mClip.toString());
  
  
  
              if (timestamp != 0d) {
  
                  oldPercent = percent;
  
                  percent = timestamp.doubleValue() / fullLength.doubleValue();
  
                  if (MathUtil.compare(percent, oldPercent) != 0) {
  
                      publishProgress(percent);
  
                  }
  
              }
  
  
  
              recorder.setTimestamp(grabber.getTimestamp() - mClip.getClipStartMs());
  
              recorder.record(frame);
  
          }
  
  
  
          grabber.close();
  
          recorder.close();

• Revision cdb322dd72 : Adapt ARNR filter length and strength. Adjust the filter length and strength fo

  18 mars 2013, par Paul Wilkins

  Changed Paths : Modify /vp9/encoder/vp9_firstpass.c Modify /vp9/encoder/vp9_onyx_if.c Modify /vp9/encoder/vp9_onyx_int.h Modify /vp9/encoder/vp9_rdopt.c Modify /vp9/encoder/vp9_temporal_filter.c Adapt ARNR filter length and strength. Adjust the filter length and strength for each ARF group (...)

• How do I get videoshow (or any other js package) to merge image and sound files to the length I specify rather than a constant length of 5 seconds ?

  5 décembre 2023, par Bragon

  I’m trying to take an image file and a sound file and merge them together into an mp4 file. To this end, I use videoshow.js which is basically a wrapper for fluent-ffmpeg.js. For some reason, videoshow always sets the duration of the output file to 5 seconds regardless of what I set the loop parameter to. And to top it all off, it fades out the sound towards the end of the clip.

  


  I’m happy for any solution to this even if it doesn’t include the use of videoshow or fluent-ffmpeg.

  


  const url = require('url');
const { smartLog } = require('../services/smart-log');
const { getFile, getDuration } = require('../services/file-service');
const videoshow = require('videoshow');
const path = require('path');
const FFmpeg = require('fluent-ffmpeg');
const fs = require('fs');

const imgToMP4 = (caption, sound, image, duration, output) => {
  smartLog('info', `Converting ${image}`);
  const images = [image];

  const videoOptions = {
    fps: 10,
    loop: duration,
    transition: false,
    videoBitrate: 1024,
    videoCodec: 'libx264',
    size: '640x?',
    audioBitrate: '128k',
    audioChannels: 2,
    format: 'mp4',
    pixelFormat: 'yuv420p',
  };

  videoshow([
    {
      path: image,
    },
  ])
    .audio(sound)
    .save(output)
    .on('start', function (command) {
      smartLog('info', `ffmpeg process started: ${image}`);
    })
    .on('error', function (err) {
      smartLog('error', err);
    })
    .on('end', function (output) {
      smartLog('info', `Video created: ${output}`);
    });
};