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• With FFMPEG, can I rewrite a .ts specific segment in an HLS m3u8 format ?

  26 février 2015, par Stacey Friesen

  I am rather new at FFMPEG and starting to dig in beyond my experience with it. Is it possible to rewrite 1 or more arbitrary .ts file segments (for example, if I have edited a scene) without having to re-encode the entire movie ?

  In addition, if the length of that segment has changed, is it as simple as changing the segment length in the m3u8 file ? For example this is the original :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-ALLOW-CACHE:YES
  
  #EXT-X-TARGETDURATION:8
  
  #EXTINF:7.007000,
  
  file0.ts
  
  #EXTINF:5.964292,
  
  file1.ts
  
  #EXTINF:1.876875,
  
  file2.ts
  
  #EXTINF:2.293958,
  
  file3.ts
  
  etc...

  change to :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-ALLOW-CACHE:YES
  
  #EXT-X-TARGETDURATION:8
  
  #EXTINF:7.007000,
  
  file0.ts
  
  #EXTINF:12.023,
  
  modified1.ts
  
  #EXTINF:1.876875,
  
  file2.ts
  
  #EXTINF:2.293958,
  
  file3.ts
  
  etc...

  You can see I would like to change file1.ts to a longer length and modify the filename. Any tips would be appreciated.

• ffmpeg combine rtsp streams in 1x4 collage (filter_complex)

  24 décembre 2016, par vyazikov

  can anyone please help understand how to make correct -filter_complex
  expression in ffmpeg to join 4 RTSP streams in a row coollage 1x4.
  The complexity is that there is ONE stream with 4 substreams inside.
  ffprobe output

  Input #0, rtsp, from 'rtsp://MyStream':
  
    Metadata:
  
      title           : h264.sdp
  
    Duration: N/A, start: 0.024944, bitrate: N/A
  
  Stream #0:0: Video: h264 (Baseline), yuv420p, 640x480, 27.92 tbr, 90k tbn, 180k tbc
  
  Stream #0:1: Video: h264 (Baseline), yuv420p, 640x480, 27.92 tbr, 90k tbn, 180k tbc
  
  Stream #0:2: Video: h264 (Baseline), yuv420p, 640x480, 27.92 tbr, 90k tbn, 180k tbc
  
  Stream #0:3: Video: h264 (Baseline), yuv420p, 640x480, 27.92 tbr, 90k tbn, 180k tbc

  Any help tips ? please..... and more examples.....)

• Merge AVCHD (.MTS) movies in JavaCV

  31 août 2014, par user2645214

  I need to merge .mts video files using JavaCV.
  Currently i use such code :

  public void merge2(){
  
  
  
              try {
  
                  FrameGrabber grabber1 = new FFmpegFrameGrabber("movie1.mpg");
  
                  grabber1.start();
  
                  FrameGrabber grabber2 = new FFmpegFrameGrabber("movie2.mpg");
  
                  grabber2.start();
  
  
  
                  FrameRecorder recorder2 = new FFmpegFrameRecorder("binded.mpg", grabber1.getImageWidth(), grabber1.getImageHeight(),grabber1.getAudioChannels());
  
                  recorder2.setFrameRate(grabber1.getFrameRate());
  
                  recorder2.start();
  
  
  
  
  
                  Frame frame;
  
                  while ((frame = grabber1.grabFrame()) != null) {    
  
                      recorder2.record(frame);        
  
                  }
  
  
  
                  while ((frame = grabber2.grabFrame()) != null) {
  
                      recorder2.record(frame);           
  
                  }
  
  
  
                  recorder2.stop();
  
                  grabber2.stop();
  
                  grabber1.stop();
  
              } catch (org.bytedeco.javacv.FrameGrabber.Exception | org.bytedeco.javacv.FrameRecorder.Exception e) {                  
  
                      e.printStackTrace();
  
              } 
  
  
  
      }

  ...which works well with the most popular video file formats such like .avi, .mpg, .mp4 or rmvb (however I have to use recent JavaCV library snapshot (0.9.1-20140828) ). But when i try merging 2 .MTS files I get error :

  org.bytedeco.javacv.FrameGrabber$Exception: avformat_open_input() error -2: Could not open input "movie1.mpg". (Has setFormat() been called?)

  (In this error movie1 has .mpg extension even although FFmpegFrameGrabber parameter is `FFmpegFrameGrabber("movie1.MTS") ; )

  As I understand , I should properly use setFormat(...) methods. But when I add this methods :

  public void merge2(){
  
  
  
              try {
  
                  FrameGrabber grabber1 = new FFmpegFrameGrabber("00727.MTS");
  
                  grabber1.setFormat(".MTS");
  
                  grabber1.start();
  
                  FrameGrabber grabber2 = new FFmpegFrameGrabber("00728.MTS");
  
                  grabber2.setFormat(".MTS");
  
                  grabber2.start();
  
  
  
                  FrameRecorder recorder2 = new FFmpegFrameRecorder("binded.MTS", grabber1.getImageWidth(), grabber1.getImageHeight(),grabber1.getAudioChannels());
  
                  recorder2.setFrameRate(grabber1.getFrameRate());
  
                  recorder2.setFormat(".MTS");
  
                  recorder2.start();
  
  
  
  
  
                  Frame frame;
  
                  while ((frame = grabber1.grabFrame()) != null) {    
  
                      recorder2.record(frame);        
  
                  }
  
  
  
                  while ((frame = grabber2.grabFrame()) != null) {
  
                      recorder2.record(frame);           
  
                  }
  
  
  
                  recorder2.stop();
  
                  grabber2.stop();
  
                  grabber1.stop();
  
              } catch (org.bytedeco.javacv.FrameGrabber.Exception | org.bytedeco.javacv.FrameRecorder.Exception e) {                  
  
                      e.printStackTrace();
  
              } 
  
  
  
      }

  ... i got error :

   av_find_input_format() error: Could not find input format ".MTS".

  So, is it possible to merge 2 .MTS video files in JavaCv ? If not how can I try to deal with this problem - how can I join .MTS files in Java ? Actually I have no idea, so all tips will be appreciated :).