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• How do you run a ffmpeg command in Java, in MacOS, using a ProcessBuilder

  5 août 2020, par nottAbott

  I am writing a program in Java that uses ffmpeg to "snip" a video into several pieces and the stitch them back together again. I have everything working relatively smoothly in Windows, but I cannot get ffmpeg to work in Mac, or in Linux for that matter. I'm focusing on mac right now though. I thought that it might be a permissions problem, but when I run it with sudo I get an error that says (after typing in the password :

  


  sudo: ffmpeg: command not found


  


  when I run it without sudo I get :

  


  java.io.IOException: Cannot run program "ffmpeg": error=2, No such file or directory


  


  I think that it might be because the ffmpeg package, on the Mac machine, was downloaded with homebrew, and ffmpeg is stored in /usr/local/Cellar/ffmpeg instead of the default folder, wherever it may be. That may not be the problem though, because I deleted ffmpeg and re-downloaded it with homebrew. It may have been in its defaulter folder in my first tests as well. It would be great to figure this out. Most of my family uses Mac (not me) and I really want to share my work with them. That is why I chose to code this in Java. Oh, and I did try using the directory to the binary in the command. Here's the code :

  


      //snips out all the clips from the main video
    public void snip() throws IOException, InterruptedException {
        
        for(int i = 0; i < snippets.size(); i++) {
            //ffmpeg -i 20sec.mp4 -ss 0:0:1 -to 0:0:5 -c copy foobar.mp4
            String newFile = "foobar" + String.valueOf(i) + ".mp4";
            
            //THIS WORKS
            if(OS.isWindows()) {
                ProcessBuilder processBuilder = new ProcessBuilder("ffmpeg", "-i", videoName, "-ss",
                        snippets.get(i).getStartTime(), "-to", snippets.get(i).getEndTime(), newFile);
                            
                Process process = processBuilder.inheritIO().start();
                process.waitFor();
                System.out.println("Win Snip " + i + "\n");
            }
            
            else if (OS.isMac()) {
                //FFMPEG LOCATION: /usr/local/Cellar/ffmpeg
                //THE ERROR: sudo: ffmpeg: command not found
                //ERROR W/OUT SUDO: java.io.IOException: Cannot run program "ffmpeg": error=2, No such file or directory
                ProcessBuilder processBuilder = new ProcessBuilder("sudo", "-S", "ffmpeg", "-f", videoName, "-ss",
                        snippets.get(i).getStartTime(), "-to", snippets.get(i).getEndTime(), newFile);
                
                Process process = processBuilder.inheritIO().start();
                process.waitFor();
                System.out.println("Mac Snip " + i + "\n");
            }
            
            else if (OS.isUnix()) {
                System.out.println("Your operating system is not supported");
                //TODO
                //need to figure out if deb/red hat/whatever are different
            }
            
            else if (OS.isSolaris()) {
                System.out.println("Your operating system is not supported yet");
                //TODO probably won't do
            }
            
            else {
                 System.out.println("Your operating system is not supported");
            }
            //add to the list of files to be concat later
            filesToStitch.add(newFile);
            filesToDelete.add(newFile);
            
        }
        //System.out.println(stitchFiles);
    }


  


• Python code mutes whole video instead of sliding a song. What shall I do ?

  16 juillet 2023, par Armed Nun

  I am trying to separate a song into 4 parts and slide the parts in random parts of a video. The problem with my code is that the final output video is muted. I want to play parts of the song at random intervals and while the song is playing the original video shall be muted. Thanks to everyone who helps

  


  import random
from moviepy.editor import *

def split_audio_into_parts(mp3_path, num_parts):
    audio = AudioFileClip(mp3_path)
    duration = audio.duration
    part_duration = duration / num_parts

    parts = []
    for i in range(num_parts):
        start_time = i * part_duration
        end_time = start_time + part_duration if i < num_parts - 1 else duration
        part = audio.subclip(start_time, end_time)
        parts.append(part)

    return parts

def split_video_into_segments(video_path, num_segments):
    video = VideoFileClip(video_path)
    duration = video.duration
    segment_duration = duration / num_segments

    segments = []
    for i in range(num_segments):
        start_time = i * segment_duration
        end_time = start_time + segment_duration if i < num_segments - 1 else duration
        segment = video.subclip(start_time, end_time)
        segments.append(segment)

    return segments

def insert_audio_into_segments(segments, audio_parts):
    modified_segments = []
    for segment, audio_part in zip(segments, audio_parts):
        audio_part = audio_part.volumex(0)  # Mute the audio part
        modified_segment = segment.set_audio(audio_part)
        modified_segments.append(modified_segment)

    return modified_segments

def combine_segments(segments):
    final_video = concatenate_videoclips(segments)
    return final_video

# Example usage
mp3_file_path = "C:/Users/Kris/PycharmProjects/videoeditingscript124234/DENKATA - Podvodnica Demo (1).mp3"
video_file_path = "C:/Users/Kris/PycharmProjects/videoeditingscript124234/family.guy.s21e13.1080p.web.h264-cakes[eztv.re].mkv"
num_parts = 4

audio_parts = split_audio_into_parts(mp3_file_path, num_parts)
segments = split_video_into_segments(video_file_path, num_parts)
segments = insert_audio_into_segments(segments, audio_parts)
final_video = combine_segments(segments)
final_video.write_videofile("output.mp4", codec="libx264", audio_codec="aac")


  


  I tried entering most stuff into chatGPT and asking questions around forums but without sucess, so lets hope I can see my solution here

  


• How to use Intel Quick Sync/iGPU in OVH dedicated server

  3 octobre 2022, par Meir

  I have a dedicated server with the following HW :

  


  CPU: Intel(R) Xeon(R) E-2386G CPU @ 3.50GHz
Motherboard: Manufacturer: ASRockRack, Product Name: E3C252D4U-2T/OVH


  


  According to the Intel website, E-2386G has Intel Quick Sync, and I want to use it.
I tried to check which VGA I have in the system (expected to see Intel + the local), and this is the output :

  


  05:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics Family (rev 41)


  


  I.e., the Intel iGPU doesn't recognize at all in the system, I tried to check in /dev/dri what are the existing devices there, and this is the output :

  


  ls -alh /dev/dri
total 0
drwxr-xr-x  3 root root      80 Sep 19 10:28 .
drwxr-xr-x 18 root root    4.2K Sep 20 13:05 ..
drwxr-xr-x  2 root root      60 Sep 19 10:28 by-path
crw-rw----  1 root video 226, 0 Sep 19 10:28 card0


  


  When I tried to run vainfo tool, I get the following results :

  


  Vanilla run :

  


  vainfo
error: can't connect to X server!
libva info: VA-API version 1.7.0
libva error: vaGetDriverNameByIndex() failed with unknown libva error, driver_name = (null)
vaInitialize failed with error code -1 (unknown libva error),exit


  


  Run after setting export LIBVA_DRIVER_NAME=i965 :

  


  vainfo
error: can't connect to X server!
libva info: VA-API version 1.7.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_1_6
libva error: /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so init failed
libva info: va_openDriver() returns -1
vaInitialize failed with error code -1 (unknown libva error),exit


  


  Run with sudo :

  


  sudo vainfo
error: XDG_RUNTIME_DIR not set in the environment.
error: can't connect to X server!
libva info: VA-API version 1.7.0
libva error: vaGetDriverNameByIndex() failed with unknown libva error, driver_name = (null)
vaInitialize failed with error code -1 (unknown libva error),exit


  


  How can I use Intel Quick Sync ?

  


  --- edit ---

  


  Running the suggested commands :

  


  vainfo --display DRM
libva info: VA-API version 1.7.0
libva error: vaGetDriverNameByIndex() failed with unknown libva error, driver_name = (null)
vaInitialize failed with error code -1 (unknown libva error),exit

vainfo --display wayland
error: failed to initialize display 'wayland'

vainfo --display help
Available displays:
  wayland
  x11
  DRM


sudo journalctl -b | grep i965  (no results)