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• Java ffmpeg cli wrapper : This binary is not a supported version of ffprobe

  5 juillet 2022, par Andrea Goldoni

  I need to use ffmpeg for one of my projects and I found this wrapper : https://github.com/bramp/ffmpeg-cli-wrapper . I've been trying to run it for a few days now, but I keep getting this error at runtime and I don't know how to fix it :

  


  

  


  I'm on Ubuntu 20.04.4 and I installed ffmpeg from the command line and I have static version 5.0.1. I've tried installing earlier versions, but if I do I get another runtime error saying I don't have permissions to run the program.
  
That's my code :

  


  import net.bramp.ffmpeg.FFmpeg;
import net.bramp.ffmpeg.FFmpegExecutor;
import net.bramp.ffmpeg.FFprobe;
import net.bramp.ffmpeg.builder.FFmpegBuilder;
import net.bramp.ffmpeg.probe.FFmpegProbeResult;

import java.io.IOException;

public class Main {
    public static void main(String argv[]) throws IOException {
        FFmpeg ffmpeg = new FFmpeg("/usr/local/bin/ffmpeg");
        FFprobe ffprobe = new FFprobe("/usr/local/bin/ffmpeg");
        String inFilename = "/home/andreag/Desktop/ffmpegWithJar/src/resources/input.mp4";
        FFmpegProbeResult in = ffprobe.probe(inFilename);

        FFmpegBuilder builder =
                new FFmpegBuilder()
                        .setInput(inFilename) // Filename, or a FFmpegProbeResult
                        .setInput(in)
                        .overrideOutputFiles(true) // Override the output if it exists
                        .addOutput("/home/andreag/Desktop/ffmpegWithJar/src/resources/output.mp4") // Filename for the destination
                        .setFormat("mp4") // Format is inferred from filename, or can be set
                        .setTargetSize(250_000) // Aim for a 250KB file
                        .disableSubtitle() // No subtiles
                        .setAudioChannels(1) // Mono audio
                        .setAudioCodec("aac") // using the aac codec
                        .setAudioSampleRate(48_000) // at 48KHz
                        .setAudioBitRate(32768) // at 32 kbit/s
                        .setVideoCodec("libx264") // Video using x264
                        .setVideoFrameRate(24, 1) // at 24 frames per second
                        .setVideoResolution(640, 480) // at 640x480 resolution
                        .setStrict(FFmpegBuilder.Strict.EXPERIMENTAL) // Allow FFmpeg to use experimental specs
                        .done();

        FFmpegExecutor executor = new FFmpegExecutor(ffmpeg, ffprobe);

        // Run a one-pass encode
        executor.createJob(builder).run();

        // Or run a two-pass encode (which is slower at the cost of better quality
        executor.createTwoPassJob(builder).run();
    }
}


  


• how to solve '[mov,mp4,m4a,3gp,3g2,mj2 @ 0000021c356d9e00] moov atom not found' in opencv

  9 juillet 2022, par Daniel dos Santos

  I'm trying to create a video uploader in a kivy app using OpenCV. However, when I try to upload a video, I get the following error

  



  [mov,mp4,m4a,3gp,3g2,mj2 @ 0000021c356d9e00] moov atom not found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000021c356d9e00] moov atom not found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000021c356d9e00] moov atom not found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000021c356d9e00] moov atom not found
...


  



  The screen becomes unresponsive during this. I edited the save() function recently and added an uploadClass() because I was getting another error.

  



  main.py

  



  ...

class SaveDialog(Screen):
    save = ObjectProperty(None)
    text_input = ObjectProperty(None)
    cancel = ObjectProperty(None)

    def save(self, path, filename):

        for letter in os.path.join(path, filename):
            print(letter)

        def find(s, ch):
            return [i for i, letter in enumerate(s) if letter == ch]

        os_path_simpl = list(os.path.join(path, filename))

        for t in range(len(find(os.path.join(path, filename), '\\'))):
            os_path_simpl[find(os.path.join(path, filename), '\\')[t]] = '\\'

        class uploadClass(object):
            video = ''.join(os_path_simpl)

            def __init__(self, src=video):
                self.video_selected = cv2.VideoCapture(src)

                self.vid_cod = cv2.VideoWriter_fourcc(*'mp4v')
                self.out = cv2.VideoWriter('media/testOne.mp4', self.vid_cod, 20.0, (640,480))

                self.thread = Thread(target=self.update, args=())
                self.thread.daemon = True
                self.thread.start()

            def update(self):
                while True:
                    if self.video_selected.isOpened():
                        (self.status, self.frame) = self.video_selected.read()

            def show_frame(self):
                if self.status:
                    cv2.imshow('uploading', self.frame)

                if cv2.waitKey(10) & 0xFF == ord('q'):
                    self.video_selected.release()
                    self.out.release()
                    cv2.destroyAllWindows()
                    exit(1)

            def save_frame(self):
                self.out.write(self.frame)

        rtsp_stream_link = 'media/testOne.mp4'
        upload_Class = uploadClass(rtsp_stream_link)
        while True:
            try:
                upload_Class.__init__()
                upload_Class.show_frame()
                upload_Class.save_frame()
            except AttributeError:
                pass

        sm.current = "home"

...



  


• FFmpeg compilation warnings ATOMIC_VAR_INIT

  2 août 2022, par Yoz

  While compiling ffmpeg (commit 1368b5a) with emscripten 3.1.17, there are two warnings, I would like the internet to help me better understand (I am not someone with deep c++ experience) :

  


  fftools/ffmpeg.c:339:41: warning: macro 'ATOMIC_VAR_INIT' has been marked as deprecated [-Wdeprecated-pragma]
static atomic_int transcode_init_done = ATOMIC_VAR_INIT(0);
                                        ^
/home/XYZ/ffmpeg-wasm/modules/emsdk/upstream/lib/clang/15.0.0/include/stdatomic.h:50:41: note: macro marked 'deprecated' here
#pragma clang deprecated(ATOMIC_VAR_INIT)
                                        ^


  


  I understand ATOMIC_VAR_INIT in this place is deprecated, but by which tool (emscripten, clang) ? And which party to be involved in the fix.

  


  The other one is also interesting :

  


  fftools/ffmpeg_filter.c:898:35: warning: floating-point comparison is always true; constant cannot be represented exactly in type 'float' [-Wliteral-range]
        if (audio_drift_threshold != 0.1)
            ~~~~~~~~~~~~~~~~~~~~~ ^  ~~~


  


  The message and consequences are very clear. Whats not clear to me, is, if this is particular compiler issue, or code issue and which party to take care ?