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• (java.net.ProtocolException) Unable to stream video in video view. (Video which was trimmed using FFmpeg

  16 décembre 2020, par Suraj

  Hello I am using the below command to trim video using FFmpeg (trim without re-encoding)

  


  String[] command = new String[]{"-y", "-i", original_path, "-ss", ""+ startMs / 1000, "-t" , "" +((endMs - startMs) / 1000), "-c", "copy", dest.getPath()};


  


  Now this trimmed video is present on my server but i am not able to stream it in video view. Whereas I can play the other videos which was not trimmed using FFmpeg.

  


  Below is the code load video in videoview

  


  VideoView videov = findViewById(R.id.videov);
Uri uri = Uri.parse("http://x.x.xxxx.xxxx:8000/xxxxxApp/media/xxxx/1608121174332.mp4");
videov.setVideoURI(uri);
videov.start();


  


  Also I can play the same video in webview control.

  


• Why does the remainder of the video not appear in this FFMPEG complex filter graph ?

  10 janvier 2019, par Jonathan Gilbert

  I have a filter graph where I am trying to shift the first 18 seconds of a long video up by 60 pixels in each frame (the frame size is 1920x1040) without affecting the rest of the video. The graph definition looks like this :

  -filter_complex "[0:v] trim=start=0:duration=18 [pretitle];\
  
                   [0:v] trim=start=18,setpts=PTS-STARTPTS [remainder];\
  
                   color=color=black:size=1920x1040 [blank];\
  
                   [blank][pretitle] overlay=0:-60 [pretitle_shifted];\
  
                   [pretitle_shifted][remainder] concat [t];\
  
                   [t] ass=Subtitles.ass,fade=t=out:st=2608.6:d=2 [output]"
  
  -map [output] -map 0:1

  This filter graph runs without errors, but after the first 18 seconds, the video is just the subtitles on a black background. I can’t figure out why. :-(

• Adding trimming option to Youtube-dl audio script

  22 septembre 2020, par Jim Jamil

  This is the current script, it's a Windows batch file that prompts for a Youtube url and then downloads the best audio in m4a. It's basically cobbled together and uses aria2 to manage the download.

  


  @echo off
SETLOCAL ENABLEDELAYEDEXPANSION
(set /p var1="Url? " && youtube-dl -f bestaudio[ext=m4a] --external-downloader aria2c --external-downloader-args "-j 16 -s 16 -x 16 -k 5M" --restrict-filenames -o "%%(title)s.%%(ext)s" --add-metadata --embed-thumbnail !Var1!)
ENDLOCAL
pause


  


  After asking for the url, I want to also prompt the user to input the start and end times to trim the audio, which would be done by ffmpeg post download.

  


  Something like :

  


  ffmpeg -i file.m4a -ss 00:00:20 -to 00:00:40 -c copy file-2.m4a


  


  Based on this : https://unix.stackexchange.com/questions/182602/trim-audio-file-using-start-and-stop-times/302469#302469

  


  The beginning and end times would need to be variables set by user input in 00:00:00 format, but not sure how to add the ffmpeg post-processing at the end or how it would all fit together. I want to add this trimming feature to remove some of the preamble on podcasts and get straight to the guest part of the show.

  


  The --embed-thumbnail is optional, and won't work anyway unless Atomic Parsley is present. FFmpeg often has trouble with Album Art anyway so I usually just use -vn on the final output file.