Recherche avancée

Sur d’autres sites (5072)

• Restoring corrupted video after recovery

  22 août 2019, par Harold.Demure

  I have recently recovered the content of an old drive of mine using photorec.

  To my surprise, photorec recovered a lot of files with non-video extensions (.sqlite, .apple, .pdf, .torrent...) that contain fragments of video. I can see these fragments only using mplayer/mencoder (quicktime and vlc cannot). Some of the files are even hundreds of megabyte large, but mplayer only shows me a few seconds of the video.

  Is there any script/data carving tool that I can use to see if I can recover more video fragments from these files ? I am not afraid of trying solutions that require some coding or manual inspection (e.g., search for headers via hex editors).

  Thank you for your help, any suggestion is highly appreciated.
  Harol.

• Queue in Python processing more than one video at a time ? [closed]

  12 novembre 2024, par Mateus Coelho

  I have an raspberry pi, that i proccess videos, rotate and put 4 water marks, but, when i run into the raspberry pi, it uses 100% of 4CPUS threads and it reboots. I solved this using -threads 1, to prevent the usage of just one of the 4 CPUS cores, it worked.

  


  I made a Queue to procces one at a time, because i have 4 buttons that trigger the videos. But, when i send more then 3 videos to the Queue, the rasp still reboots, and im monitoring the CPU usage, is 100% for only one of the four CPUS


  


  But, if i send 4 or 5 videos to the thread folder, it completly reboots, and the most awkward, its after the reboot, it made its way to proceed all the videos.

  


  
import os
import time
import subprocess
from google.cloud import storage
import shutil

QUEUE_DIR = "/home/abidu/Desktop/ApertaiRemoteClone"
ERROR_VIDEOS_DIR = "/home/abidu/Desktop/ApertaiRemoteClone/ErrorVideos"
CREDENTIALS_PATH = "/home/abidu/Desktop/keys.json"
BUCKET_NAME = "videos-283812"

def is_valid_video(file_path):
    try:
        result = subprocess.run(
            ['ffprobe', '-v', 'error', '-show_entries', 'format=duration', '-of', 'default=noprint_wrappers=1:nokey=1', file_path],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE
        )
        return result.returncode == 0
    except Exception as e:
        print(f"Erro ao verificar o vídeo: {e}")
        return False

def overlay_images_on_video(input_file, image_files, output_file, positions, image_size=(100, 100), opacity=0.7):
    inputs = ['-i', input_file]
    for image in image_files:
        if image:
            inputs += ['-i', image]
    filter_complex = "[0:v]transpose=2[rotated];"
    current_stream = "[rotated]"
    for i, (x_offset, y_offset) in enumerate(positions):
        filter_complex += f"[{i+1}:v]scale={image_size[0]}:{image_size[1]},format=rgba,colorchannelmixer=aa={opacity}[img{i}];"
        filter_complex += f"{current_stream}[img{i}]overlay={x_offset}:{y_offset}"
        if i < len(positions) - 1:
            filter_complex += f"[tmp{i}];"
            current_stream = f"[tmp{i}]"
        else:
            filter_complex += ""
    command = ['ffmpeg', '-y', '-threads', '1'] + inputs + ['-filter_complex', filter_complex, '-threads', '1', output_file]

    try:
        result = subprocess.run(command, check=True)
        result.check_returncode()  # Verifica se o comando foi executado com sucesso
        print(f"Vídeo processado com sucesso: {output_file}")
    except subprocess.CalledProcessError as e:
        print(f"Erro ao processar o vídeo: {e}")
        if "moov atom not found" in str(e):
            print("Vídeo corrompido ou sem o moov atom. Pulando o arquivo.")
        raise  # Relança a exceção para ser tratada no nível superior

def process_and_upload_video():
    client = storage.Client.from_service_account_json(CREDENTIALS_PATH)
    bucket = client.bucket(BUCKET_NAME)
    
    while True:
        # Aguarda 10 segundos antes de verificar novos vídeos
        time.sleep(10)

        # Verifica se há arquivos no diretório de fila
        queue_files = [f for f in os.listdir(QUEUE_DIR) if f.endswith(".mp4")]
        
        if queue_files:
            video_file = os.path.join(QUEUE_DIR, queue_files[0])  # Pega o primeiro vídeo na fila
            
            # Define o caminho de saída após o processamento com o mesmo nome do arquivo de entrada
            output_file = os.path.join(QUEUE_DIR, "processed_" + os.path.basename(video_file))
            if not is_valid_video(video_file):
                print(f"Arquivo de vídeo inválido ou corrompido: {video_file}. Pulando.")
                os.remove(video_file)  # Remove arquivo corrompido
                continue

            # Processa o vídeo com a função overlay_images_on_video
            try:
                overlay_images_on_video(
                    video_file,
                    ["/home/abidu/Desktop/ApertaiRemoteClone/Sponsor/image1.png", 
                     "/home/abidu/Desktop/ApertaiRemoteClone/Sponsor/image2.png", 
                     "/home/abidu/Desktop/ApertaiRemoteClone/Sponsor/image3.png", 
                     "/home/abidu/Desktop/ApertaiRemoteClone/Sponsor/image4.png"],
                    output_file,
                    [(10, 10), (35, 1630), (800, 1630), (790, 15)],
                    image_size=(250, 250),
                    opacity=0.8
                )
                
                if os.path.exists(output_file):
                    blob = bucket.blob(os.path.basename(video_file).replace("-", "/"))
                    blob.upload_from_filename(output_file, content_type='application/octet-stream')
                    print(f"Uploaded {output_file} to {BUCKET_NAME}")
                    os.remove(video_file)
                    os.remove(output_file)
                    print(f"Processed and deleted {video_file} and {output_file}.")
            
            except subprocess.CalledProcessError as e:
                print(f"Erro ao processar {video_file}: {e}")
                
                move_error_video_to_error_directory(video_file)

                continue  # Move para o próximo vídeo na fila após erro

def move_error_video_to_error_directory(video_file):
    print(f"Movendo arquivo de vídeo com erro {video_file} para {ERROR_VIDEOS_DIR}")

    if not os.path.exists(ERROR_VIDEOS_DIR):
        os.makedirs(ERROR_VIDEOS_DIR)
                
    shutil.move(video_file, ERROR_VIDEOS_DIR)

if __name__ == "__main__":
    process_and_upload_video()



  


• Revision 3273 : On utilise notation et on définit un critère _dist pour notation plutot

  18 avril 2010, par kent1 — Log

  On utilise notation et on définit un critère _dist pour notation plutot