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• avcodec/ffv1dec : Limit size of fltmap* to pixel number

  3 avril, par Michael Niedermayer

  avcodec/ffv1dec : Limit size of fltmap* to pixel number
  This reduces needed memory and also removes the 65536 maximum for remap
  
  on the decoder side
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/ffv1.c
  • [DH] libavcodec/ffv1.h
  • [DH] libavcodec/ffv1dec.c

• avcodec/aac/aacdec_lpd : Limit get_unary()

  8 février, par Michael Niedermayer

  avcodec/aac/aacdec_lpd : Limit get_unary()
  The limit is based on later code storing 32bits
  Fixes : signed integer overflow : 2147483647 + 1 cannot be represented in type 'int'
  
  Fixes : 393164866/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_LATM_fuzzer-4606798354513920
  Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/aac/aacdec_lpd.c

• Can i limit CPU usage of my Script ? Raspberry pi cpu crashing - rebooting [duplicate]

  5 novembre 2024, par Mateus Coelho

  I have a script, in python, that converts a video of 11mb, 30fps, 1080p. the code puts 4 imagens into it, with overlay, and rotates 90.
When i run the script into the raspberry pi, it goes off CPU, all the 4 threads go to 100% and it suently reboots.

  


  Raspberry pi 4 b 4gb

  


  I want to limit the cpu to like 60% to the script... its not a problems to be longer in time.

  


  import subprocess
import sys
import time
import psutil
import os

def overlay_images_on_video(input_file, image_files, output_file, positions, image_size=(100, 100), opacity=0.7):
    start_time = time.time()
    process = psutil.Process(os.getpid())

    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', '-threads', '1'] + inputs + ['-filter_complex', filter_complex, output_file]
    
    try:
        subprocess.run(command, check=True)
        print(f"Vídeo processado com sucesso: {output_file}")
    except subprocess.CalledProcessError as e:
        print(f"Erro ao processar o vídeo: {e}")
    
    # Monitoramento de tempo, memória e CPU
    elapsed_time = time.time() - start_time
    memory_info = process.memory_info()
    cpu_usage = process.cpu_percent(interval=1)
    print(f"Tempo de execução: {elapsed_time:.2f} segundos")
    print(f"Memória usada: {memory_info.rss / (1024 * 1024):.2f} MB")
    print(f"Uso de CPU: {cpu_usage}%")
    
    # Monitoramento de GPU (se disponível)
    try:
        gpu_usage = subprocess.check_output(
            ["nvidia-smi", "--query-gpu=utilization.gpu", "--format=csv,noheader,nounits"]
        ).decode("utf-8").strip()
        print(f"Uso de GPU: {gpu_usage}%")
    except FileNotFoundError:
        print("GPU não detectada ou `nvidia-smi` não está disponível.")

if __name__ == "__main__":
    input_video = sys.argv[1]
    image_files = sys.argv[2:5]
    output_video = sys.argv[5]
    
    positions = [(10, 10), (35, 1630), (800, 1630)]
    overlay_images_on_video(input_video, image_files, output_video, positions, image_size=(250, 250), opacity=0.8)


  


  EDITED :

  


  The 4 cores of the CPU goes to 100%, i can see in another ssh terminal via htop, and it sudently reboots.
I have other 9 scripts running on the back, 6 ffmpeg stremas and 3 others to caputre the videos. When i add this logic to the other 3 that captures the video or i try to run directly one time, it reboots