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• Index error with MoviePy and OSError : MoviePy error : failed to read the duration of file

  24 août 2022, par Alejandro

  I made a small script to concatenate some clips. The names of the clips are stored in another text file that is read from.

  


  I get the error first that

  


  in ffmpeg_parse_infos
line = [l for l in lines if keyword in l][index]
IndexError: list index out of range


  


  then during that exception above, another occurs below

  


  Traceback (most recent call last):&#xA;  File "e:\Projects\TwitchMontage\VideoCompilation\src\create_video.py", line 32, in <module>&#xA;    clips = create_clips_from_list(list)&#xA;  File "e:\Projects\TwitchMontage\VideoCompilation\src\create_video.py", line 20, in create_clips_from_list&#xA;    clip = VideoFileClip(str(video_file_path))&#xA;  File "C:\Users\Alejandro\AppData\Local\Programs\Python\Python38\lib\site-packages\moviepy\video\io\VideoFileClip.py", line 88, in __init__&#xA;    self.reader = FFMPEG_VideoReader(filename, pix_fmt=pix_fmt,&#xA;  File "C:\Users\Alejandro\AppData\Local\Programs\Python\Python38\lib\site-packages\moviepy\video\io\ffmpeg_reader.py", line 35, in __init__&#xA;    infos = ffmpeg_parse_infos(filename, print_infos, check_duration,&#xA;  File "C:\Users\Alejandro\AppData\Local\Programs\Python\Python38\lib\site-packages\moviepy\video\io\ffmpeg_reader.py", line 289, in ffmpeg_parse_infos&#xA;    raise IOError(("MoviePy error: failed to read the duration of file %s.\n"&#xA;OSError: MoviePy error: failed to read the duration of file E:\Projects\TwitchMontage\VideoCompilation\VideoFiles\raw_clips\clip0.mp4&#xA;</module>

  


  I suspect something is wrong with FFMPEG but I have no idea what to change to fix this. Is there any manipulation I can make to FFMPEG or the videos themselves to make them work with moviepy ?

  


  Code is below :

  


  import os
from moviepy.editor import VideoFileClip, concatenate_videoclips

PATH_TO_VALID_CLIPS = 'VideoCompilation/ClipData/valid_clips.txt'
PATH_TO_RAW_CLIPS = 'E:\Projects\TwitchMontage\VideoCompilation\VideoFiles\\raw_clips'
os.environ['IMAGEIO_FFMPEG_EXE'] = 'ffmpeg'

def read_valid_clips_list():
    #read valid clips
    file = open(PATH_TO_VALID_CLIPS, 'r')
    list = file.readlines()
    return list

def create_clips_from_list(list):
    clips = []
    for i, filename in enumerate(list):
        print(str(i) + '\n')
        video_file_path = os.path.abspath(os.path.join(PATH_TO_RAW_CLIPS, filename))
        print(video_file_path + '\n')
        clip = VideoFileClip(str(video_file_path))
        clips.append(clip)

    return clips

def create_draft(clips):
    draft = concatenate_videoclips(clips)
    draft.write_videofile("VideoCompilation/VideoFiles/videos/draft.mp4")
    return draft

list = read_valid_clips_list()
clips = create_clips_from_list(list)
draft = create_draft(clips)


  


  EDIT :

  


  I discovered something strange. When I manually create the combined video, there are no errors but the video created is corrupted and unplayable.

  


  

  


• acces to data stream (KLV) with windows media-foundation

  20 février 2023, par hacenesh

  Is there any way to acces data stream with Windows Media Foundation ?

  


  I have a video stream that contains tree streams : Audio, video and Data stream
When I opend the file with ffmpeg I can access the three stream :

  


  

  • AVMEDIA_TYPE_AUDIO

  


  • AVMEDIA_TYPE_VIDEO

  


  • AVMEDIA_TYPE_DATA

  


  


  This image show more details about the data stream I wanted to retrieve.


  


  With windows media-foundation I can only see audio and video streams.

  


  IMFMediaSource* pVideoSource = NULL;
IMFSourceReader* pVideoReader = NULL;           
....
....
while (pVideoReader->GetStreamSelection(stmIndex, &isSelected) == S_OK) {
      printf("Stream %d is selected %d.\n", stmIndex, isSelected);

      CHECK_HR(pVideoReader->GetCurrentMediaType(stmIndex, &pStmMediaType), "Failed to get media type for selected stream.");

      std::cout << "Media type: " << GetMediaTypeDescription(pStmMediaType) << std::endl;

      GUID majorMediaType;
      pStmMediaType->GetGUID(MF_MT_MAJOR_TYPE, &majorMediaType);
      if (majorMediaType == MFMediaType_Audio) {
          std::cout << "Source audio stream index is " << stmIndex << "." << std::endl;
      }
      else if (majorMediaType == MFMediaType_Video) {
          std::cout << "Video stream index is " << stmIndex << "." << std::endl;
      }
      stmIndex++;
      SAFE_RELEASE(pStmMediaType);
  }



  


  **Output **

  


  


  Stream 0 is selected 1.
Media type : MFMediaType_Audio : MF_MT_AUDIO_AVG_BYTES_PER_SECOND=16031, MF_MT_AUDIO_BLOCK_ALIGNMENT=1, 33026EE0-E387-4582-AE0A-34A2AD3BAA18=1, MF_MT_AUDIO_NUM_CHANNELS=2, MF_MT_MAJOR_TYPE=MFMediaType_Audio, MF_MT_AUDIO_SAMPLES_PER_SECOND=48000, MF_MT_AAC_AUDIO_PROFILE_LEVEL_INDICATION=254, MF_MT_AUDIO_PREFER_WAVEFORMATEX=1, MF_MT_USER_DATA=, MF_MT_FIXED_SIZE_SAMPLES=1, MF_MT_AAC_PAYLOAD_TYPE=1, MF_MT_ALL_SAMPLES_INDEPENDENT=1, MF_MT_SAMPLE_SIZE=1, MF_MT_SUBTYPE=MFAudioFormat_AAC,
Source audio stream index is 0.
Stream 1 is selected 1.
Media type : MFMediaType_Video : MF_MT_FRAME_SIZE=W:1920 H : 1080, MF_MT_MPEG_SEQUENCE_HEADER=, MF_MT_MAJOR_TYPE=MFMediaType_Video, MF_MT_AM_FORMAT_TYPE=E06D80E3-DB46-11CF-B4D1-00805F6CBBEA, MF_MT_MPEG2_LEVEL=41, MF_MT_MPEG2_PROFILE=66, MF_MT_FIXED_SIZE_SAMPLES=1, MF_MT_FRAME_RATE=25/1, MF_MT_PIXEL_ASPECT_RATIO=1:1, MF_MT_SAMPLE_SIZE=1, MF_MT_INTERLACE_MODE=2, MF_MT_SUBTYPE=3F40F4F0-5622-4FF8-B6D8-A17A584BEE5E,
Video stream index is 1.
Source media type count : 1, is first stream selected 1.
Default output media type for source reader :
MFMediaType_Video : MF_MT_FRAME_SIZE=W:1920 H : 1080, MF_MT_MPEG_SEQUENCE_HEADER=, MF_MT_MAJOR_TYPE=MFMediaType_Video, MF_MT_AM_FORMAT_TYPE=E06D80E3-DB46-11CF-B4D1-00805F6CBBEA, MF_MT_MPEG2_LEVEL=41, MF_MT_MPEG2_PROFILE=66, MF_MT_FIXED_SIZE_SAMPLES=1, MF_MT_FRAME_RATE=25/1, MF_MT_PIXEL_ASPECT_RATIO=1:1, MF_MT_SAMPLE_SIZE=1, MF_MT_INTERLACE_MODE=2, MF_MT_SUBTYPE=3F40F4F0-5622-4FF8-B6D8-A17A584BEE5E,

  


  


  I also looked on the sample metadata. I didn't find anything.
MFSampleExtension_CaptureMetadata

  


   HRESULT hr = videoSample->GetUnknown(MFSampleExtension_CaptureMetadata, IID_IMFAttributes, (void**)&pAttributes);


  


  Result

  


  


  hr = 0xc00d36e6 : The requested attribute was not found.
access to data stream with media-foundation

  


  


• ProcessBuilder is not called when trying to start a process

  15 juin 2022, par xnok

  I am trying to understand more about the ffmpeg usage in JavaCV for android studio and for said task I am trying to use ProcessBuilder. I tried writting a simple program to debug the pb.start(); Although, I am not getting a response. What I did was to start a default/empty activity and pasted the following program :

  


  package com.example.myapplication;

import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;

import org.bytedeco.javacpp.Loader;

import android.os.Build;
import android.os.Bundle;
import android.util.Log;

public class MainActivity extends AppCompatActivity {
    static final int cols = 192;
    static final int rows = 108;
    static final String ffmpeg = Loader.load(org.bytedeco.ffmpeg.ffmpeg.class);
    static final String rtmp_url = "test.flv";
    static final String[] command = {ffmpeg,
            "-y",
            "-f", "rawvideo",
            "-vcodec", "rawvideo",
            "-pix_fmt", "bgr24",
            "-s", (Integer.toString(cols) + "x" + Integer.toString(rows)),
            "-r", "10",
            "-i", "pipe:",
            "-c:v", "libx264",
            "-pix_fmt", "yuv420p",
            "-preset", "ultrafast",
            "-f", "flv",
            rtmp_url};
    @RequiresApi(api = Build.VERSION_CODES.O)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        new Thread(t1).start();

    }
    private static Runnable t1 = () -> {
        Log.e("TAG", "void OnCreate called successfully!");
        ProcessBuilder pb = new ProcessBuilder(command).redirectErrorStream(true);
        pb.redirectErrorStream(true);
        try {
            Process process = pb.start();
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            OutputStream writer = process.getOutputStream();
            Log.e("TAG", "Something good happened here");
        } catch (IOException e) {
            e.printStackTrace();
            Log.e("TAG", "Nothing good happened here");
        }
    };


}


  


  My current problem is that I can't seem to start properly the processBuilder process via pb.start() ;

  


  I get the following logs from the logcat panel :

  


  2022-06-14 17:24:46.328 13371-13371/com.example.myapplication E/TAG: void OnCreate called successfully!
2022-06-14 17:24:46.333 13371-13371/com.example.myapplication E/TAG: Nothing good happened here


  


  I'd like to understand why is it skipping the try/catch block and not starting the process ?

  


  EDIT : I made some changes as per @g00se's suggestions and I got the following stack trace from the code above :

  


  2022-06-15 00:32:26.700 29787-29787/? E/USNET: USNET: appName: com.example.myapplication
2022-06-15 00:32:29.328 29787-29828/com.example.myapplication E/TAG: void OnCreate called successfully!
2022-06-15 00:32:29.330 29787-29828/com.example.myapplication E/AndroidRuntime: FATAL EXCEPTION: Thread-4
    Process: com.example.myapplication, PID: 29787
    java.lang.NullPointerException
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1012)
        at com.example.myapplication.MainActivity.lambda$static$0(MainActivity.java:48)
        at com.example.myapplication.MainActivity$$ExternalSyntheticLambda0.run(Unknown Source:0)
        at java.lang.Thread.run(Thread.java:920)