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• ffmpeg fail to run when converting file in window "Error opening output" [closed]

  8 juillet, par Lyhourt Te

  In my Windows 11, I use this code to use ffmpeg to convert video from one type to another type. The code is simple, it just loops and finds the target file extension and runs ffmpeg to convert the video
This code used to work just fine, but now it's not working anymore. I think it maybe because of the Windows 11 security update.

  


  import os
import subprocess

def convert_ts_to_mp4(folder_path):
    # Ensure the folder exists
    if not os.path.isdir(folder_path):
        print(f"Folder '{folder_path}' does not exist.")
        return
    
    # Loop through files in the folder
    for filename in os.listdir(folder_path):
        if filename.endswith(".ts"):  # Check if the file is a .ts file
            print("read file:", filename)
            ts_file = os.path.join(folder_path, filename)
            mp4_file = os.path.join(folder_path, filename.replace(".ts", ".mp4"))
            
            print("ts file:", ts_file)
            print("mp4 file:", mp4_file)
            
            # Run ffmpeg command
            command = ["ffmpeg", "-i", ts_file, mp4_file]
            subprocess.run(command, check=True)
            print(f"Converted: {filename} -> {os.path.basename(mp4_file)}")

if __name__ == "__main__":
    folder_path = os.path.dirname(os.path.abspath(__file__)) # Change this to your actual folder path
    convert_ts_to_mp4(folder_path)


  


  The error :

  


  Input #0, mpegts, from &#x27;C:\Users\chhor\Downloads\Video\script\python-script-for-automation\1.ts&#x27;:&#xA;  Duration: 00:44:25.20, start: 1.440000, bitrate: 3095 kb/s&#xA;  Program 1&#xA;    Metadata:&#xA;      service_name    : Service01&#xA;      service_provider: FFmpeg&#xA;  Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, progressive), 1920x872 [SAR 959:960 DAR 959:436], 25 fps, 25 tbr, 90k tbn, start 1.480000&#xA;  Stream #0:1[0x101](und): Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 130 kb/s, start 1.440000&#xA;[out#0/mp4 @ 0000014f60d66d80] Error opening output C:\Users\chhor\Downloads\Video\script\python-script-for-automation\new.mp4: No such file or directory&#xA;Error opening output file C:\Users\chhor\Downloads\Video\script\python-script-for-automation\new.mp4.&#xA;Error opening output files: No such file or directory&#xA;Traceback (most recent call last):&#xA;  File "C:\Users\chhor\Downloads\Video\script\python-script-for-automation\ts.py", line 27, in <module>&#xA;    convert_ts_to_mp4(folder_path)&#xA;  File "C:\Users\chhor\Downloads\Video\script\python-script-for-automation\ts.py", line 22, in convert_ts_to_mp4&#xA;    subprocess.run(command, check=True)&#xA;  File "C:\ProgramData\anaconda3\Lib\subprocess.py", line 571, in run&#xA;    raise CalledProcessError(retcode, process.args,&#xA;subprocess.CalledProcessError: Command &#x27;[&#x27;ffmpeg&#x27;, &#x27;-i&#x27;, &#x27;C:\\Users\\chhor\\Downloads\\Video\\script\\python-script-for-automation\\1.ts&#x27;, &#x27;C:\\Users\\chhor\\Downloads\\Video\\script\\python-script-for-automation\\new.mp4&#x27;]&#x27; returned non-zero exit status 4294967294.&#xA;</module>

  


• Model the loss of video codec

  10 janvier 2024, par Monaco

  I want to use a neural network to model the error loss after video encoding. The modeling process is as follows :

I use ffmpeg to encode and decode video frames. Since this process is not implemented using tensors in PyTorch and cannot compute gradients, I have to separately implement a neural network in PyTorch to enable gradient backpropagation. However, it turns out that the neural network cannot effectively learn the video encoding.

  


  I want to know if there are currently any implementations of video encoders or decoders that support backpropagation of gradients. I don't necessarily need to update the parameters of the encoder/decoder, but I want it to support gradient backpropagation so that I can use it for various tasks related to deep learning.

  


• How to make Enqueue callback run on seperate thread on OpenSL ES ?

  19 décembre 2020, par Michael

  I am a newbie start learning openSL ES.

  


  I understand I need to register a callback like :

  


  result = (*m_BufferQueue)->RegisterCallback(m_BufferQueue, AudioPlayerCallback, this);


  


  And inside my callback I simply need to call this :

  


  SLresult result = (*m_BufferQueue)->Enqueue(m_BufferQueue, audioFrame->data, (SLuint32) audioFrame->dataSize);


  


  Then, whenever the queue is empty, it will automatically call the callback function and consume stuff I feeding in the other data queue(stored decoded data).

  


  My question is, how to make this callback run on other thread ? So it won't block my main thread(I am decoding in main thread and feeding PCM data in a self defined queue).