Newest 'ffmpeg' Questions - Stack Overflow

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• How to execute FFMPEG using a compiled FFMPEG jar on Android

  2 février, par Valtinho

  I added org.bytedeco.javacpp's ffmpeg-2.3-0-9.jar (https://www.versioneye.com/java/org.bytedeco.javacpp-presets:ffmpeg/2.3-0.9) and I need to be able to execute a command inside of my android app, such as:

      ffmpeg -ss 00:00:00 -t 00:00:15 -i in.mp4 -codec copy out.mp4
  

  However, "ffmpeg" is not a class or a method that is exposed by this jar. Some posts suggest that I should be using the exec method when dealing with ffmpeg native code, but how do you do that (if that's even the right thing to do with this library)? I am trying the following command without success.

      Process p=Runtime.getRuntime().exec("/libs/ffmpeg-2.3-0.9 -i -i in.mp4 -codec copy out.mp4");
  

  Any suggestions?

• How to Merge two videos without re-encoding [duplicate]

  2 février, par Yogesh Agarwal

  I am trying to Merge two video without re-encoding them.

  Currently i use a approach which is too much time consuming and resource as well. I just want to merge without re-encoding them. Currently i am using

          exec ( "cpulimit -l 90 ffmpeg -i $filename1 -qscale 0  $intermediate1 &> stream1.log" );
          exec ( "cpulimit -l 90 ffmpeg -i $filename2 -qscale 0  $intermediate2 &> stream2.log" );
          $output = '/var/www/html/myserver/merg/'.uniqid().'_merge.'.$ext;
          exec ( "cpulimit -l 90 cat $intermediate1 $intermediate2 | ffmpeg -i - -qscale 0 $output &> stream3.log" );
  

  Above takes a lot of time.. I want a quick way to do it.

• How can I extract audio from video with ffmpeg ?

  2 février, par user1269669

  I tried the following command to extract audio from video:

  ffmpeg -i Sample.avi -vn -ar 44100 -ac 2 -ab 192k -f mp3 Sample.mp3
  

  but I get the following output

  libavutil     50.15. 1 / 50.15. 1
  libavcodec    52.72. 2 / 52.72. 2
  libavformat   52.64. 2 / 52.64. 2
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1.19. 0 /  1.19. 0
  libswscale     0.11. 0 /  0.11. 0
  libpostproc   51. 2. 0 / 51. 2. 0
  SamplE.avi: Invalid data found when processing input
  

  Can anyone help, please?

• Automating Basic Video Editing [closed]

  2 février, par user29470652

  What's guys! I am a beginner in programming.

  As of now, I have created a basic YouTube downloader with the help of Python, FFmpeg, yt dlp, and Flaskapp.

  Now, I am automating the basic video editing part ( Turn bulk video files into a basic similar edit like we have one template then we add a caption from the title of the video, then place the video in the center of the template trim out to meet the video length of the given video then saving it) with the help of FFmpeg.

  Has anyone already tried or built it?? Any marketer or video editor??

  I am halfway to the project

  Here is theenter image description here

  I am halfway through the project and wonder if anyone has ever done it before like any video editor or marketer??

• Gstreamer : how to achieve the same effect as ffmpeg filter tmix

  2 février, par dudengke

  The ffmpeg command can smooth video:

  ffmpeg -i 1.h265 -vf "tmix=frames=3:weights=1 1 1" 2.h265
  

  Now i want to use gstreamer to smooth but I can't find the avfilter in gst-libav

  gst-launch-1.0 filesrc location=1.h265 ! decodebin ! videoconvert ! avfilter filter="tmix=frames=3:weights=1 1 1" ! videoconvert ! gstsink
  

  My question: Is there another way gstreamer can achieve the same effect as "tmix" in ffmpeg? I tried chatGPT, but the effect was not.

  gst-launch-1.0 filesrc location=1.h265 ! h265parse ! avdec_h265 ! videoconvert ! tee name=t \
  t. ! queue ! identity single-segment=true ! videomixer name=mix sink_0::alpha=0.33 \
  t. ! queue ! identity single-segment=true ! mix.sink_1 \
  t. ! queue ! identity single-segment=true ! mix.sink_2 \
  mix. ! gtksink