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• fate : Modify a random h264 test to also test the -framerate option

  20 mars 2016, par Michael Niedermayer

  fate : Modify a random h264 test to also test the -framerate option
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] tests/fate/h264.mak
  • [DH] tests/ref/fate/h264-conformance-ba1_ft_c

• Firebase and FFmpeg : Download URL error for videos longer than one hour

  11 août 2024, par braunlich

  Summary of the problem : I'm developing a video processing feature in a React application that uses Firebase as the backend. The video file uploads to Firebase Storage without issues. However, when attempting to use FFmpeg to extract the audio as a FLAC file, the process works for videos under an hour but fails for longer videos, producing the error : "Error : File could not be read ! Code=-1".

  


  Code context : The issue occurs during the process of grabbing the video URL from Firebase Storage and extracting audio using FFmpeg. Here is the code snippet :

  


  try {
const videoDownloadURL = await getDownloadURL(uploadTask.snapshot.ref);
console.log('Video file available at', videoDownloadURL);

await ffmpeg.load();
await ffmpeg.writeFile(file.name, await fetchFile(file));
await ffmpeg.exec(['-i', file.name, '-q:a', '0', '-map', 'a', '-ac', '1', 'output.flac']); // Ensuring mono channel
const audioData = await ffmpeg.readFile('output.flac');
const audioBlob = new Blob([audioData.buffer], { type: 'audio/flac' });
const audioStorageRef = ref(storage, `${user.uid}/${videoId}.flac`);
const audioUploadTask = uploadBytesResumable(audioStorageRef, audioBlob, {
    contentType: 'audio/flac',
    customMetadata: {
        uploadedBy: user.uid,
        videoId: videoId
    }
});

audioUploadTask.on('state_changed',
    (snapshot) => {
        const audioProgress = Math.round((snapshot.bytesTransferred / snapshot.totalBytes) * 100 * 0.1);
        setUploadProgress(Math.round(videoProgress + audioProgress));
        console.log(`Audio upload progress: ${Math.round(audioProgress)}%`);
    },
    (error) => {
        console.error("Audio upload error:", error);
    },
    async () => {
        try {
            const audioDownloadURL = await getDownloadURL(audioUploadTask.snapshot.ref);
            console.log('Audio file available at', audioDownloadURL);
            audioUploadComplete = true;
        } catch (error) {
            console.error("Audio download URL error:", error);
        }
    }
);

} catch (error) { console.error("Download URL error:", error); }


  


  Issue description : The above code successfully extracts audio from videos shorter than one hour. However, for videos around two to three hours long, the code breaks with the following error message :
error code

  


  I suspect this might be related to FFmpeg or Firebase's handling of larger files, but I'm not sure how to debug this further or what adjustments to make.

  


  Research and attempts :

  


  I've confirmed that the video files are successfully uploaded to Firebase Storage.

  


  The issue appears to be related to either the FFmpeg processing or the retrieval of the download URL for larger files.

  


  I've searched for similar issues but haven't found a solution specific to handling larger video files with FFmpeg and Firebase.

  


  Request for help :

  


  Any insights on why this error might be occurring for larger files ? Suggestions for debugging or modifying the code to handle larger videos efficiently.

  


• How to correctly close a console application using the youtube-dl process to download Twitch stream whenever I want

  24 juin 2023, par ElPavlillo

  The test program has the following code :

  


  string url = "https://www.twitch.tv/ricoy";
string outputPath = @"D:\ruta_del_archivo_salida.mp4";

ProcessStartInfo startInfo = new ProcessStartInfo
{
    FileName = "youtube-dl",
    Arguments = $"-f best -o \"{outputPath}\" \"{url}\"",
    //RedirectStandardOutput = true,
    UseShellExecute = false,
    CreateNoWindow = true
};

using (Process process = new Process())
{
    process.StartInfo = startInfo;
    process.Start();

    //var output = process.StandardOutput.ReadToEnd();
    //process.WaitForExit();

    Console.Read();
    KillProcessAndChildren(process.Id);
}

static void KillProcessAndChildren(int pid)
{
    // Cannot close 'system idle process'.
    if (pid == 0)
    {
        return;
    }
    ManagementObjectSearcher searcher = new ManagementObjectSearcher
            ("Select * From Win32_Process Where ParentProcessID=" + pid);
    ManagementObjectCollection moc = searcher.Get();
    foreach (ManagementObject mo in moc)
    {
        KillProcessAndChildren(Convert.ToInt32(mo["ProcessID"]));
    }
    try
    {
        Process proc = Process.GetProcessById(pid);
        proc.Kill();
    }
    catch (ArgumentException)
    {
        // Process already exited.
    }
}


  


  The problem is that when I press de key in the console the youtube-dl process gets kill and also de ffmpeg but the file is left with .part extension and does not work.

  


  I was expecting the code to left a .mp4 file but for reason it does not.