Recherche avancée

Sur d’autres sites (4576)

• moov atom not found (Extracting unique faces from youtube video)

  10 avril 2023, par Tochukwu

  I got the error below

  


  Saved 0 unique faces
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000024f505224c0] moov atom not found


  


  Trying to extract unique faces from a YouTube video with the code below which is designed to download the YouTube video and extract unique faces into a folder named faces. I got an empty video and folder. Please do check the Python code below

  


  import os
import urllib.request
import cv2
import face_recognition
import numpy as np

# Step 1: Download the YouTube video
video_url = "https://www.youtube.com/watch?v=JriaiYZZhbY&t=4s"
urllib.request.urlretrieve(video_url, "video.mp4")

# Step 2: Extract frames from the video
cap = cv2.VideoCapture("video.mp4")
frame_count = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
frames = []
for i in range(frame_count):
    cap.set(cv2.CAP_PROP_POS_FRAMES, i)
    ret, frame = cap.read()
    if ret:
        frames.append(frame)
cap.release()

# Step 3: Detect faces in the frames
detected_faces = []
for i, frame in enumerate(frames):
    face_locations = face_recognition.face_locations(frame)
    for j, location in enumerate(face_locations):
        top, right, bottom, left = location
        face_image = frame[top:bottom, left:right]
        cv2.imwrite(f"detected_{i}_{j}.jpg", face_image)
        detected_faces.append(face_image)

# Step 4: Save the faces as separate images
if not os.path.exists("faces"):
    os.makedirs("faces")
known_faces = []
for i in range(len(detected_faces)):
    face_image = detected_faces[i]
    face_encoding = face_recognition.face_encodings(face_image)[0]
    known_faces.append(face_encoding)
    cv2.imwrite(f"faces/face_{i}.jpg", face_image)
print("Saved", len(known_faces), "unique faces")


  


• FFMPEG & YouTube Live - "Bad Video Settings" - Please use a keyframe frequency of four seconds or less

  28 janvier 2020, par John Doe

  Trying to live stream to YouTube and from my perspective, everything seems to be working fine. However YouTube keeps giving me the following message :

  Bad Video Settings

  Please use a keyframe frequency of four seconds or less. Currently, keyframes are not being sent often enough, which will cause buffering. The current keyframe frequency is 8.4 seconds. Note that ingestion errors can cause incorrect GOP (group of pictures) sizes.

  I’ve dug around for hours and so far nothing seems to be making any difference. I added -g 60 and as I didn’t fully understand I also tried adding -g 2 but neither worked. Here is the command I’m currently using :

  ffmpeg -re -f concat -safe 0 -i "concat.txt" -c copy -preset veryfast -maxrate 1200k -bufsize 2400k -framerate 30 -g 60 -f flv rtmp://a.rtmp.youtube.com/live2/XXXX-XXXX-XXXX-XXXX

• YouTube-dl - How to pass template fields to the postprocessor ?

  2 février 2019, par Sweeney Todd

  I am trying to set the playlist name to the album field, using the --postprocessor-args option (using ffmpeg) :

  youtube-dl -f bestaudio -x --audio-format mp3 --add-metadata --metadata-from-title "%(artist)s - %(title)s" --postprocessor-args "-metadata album=%(playlist)s" PLyIFQr1wryPJ-yUyeBcansxX093B9ug4y

  Artist and title fields are set correctly as expected,
  However, the %(playlist)s field is not replaced with the correct playlist name, but instead it is directly passed to ffmpeg, so the album field is set to %(playlist)s (literally).

  Is there a way to fix this problem ?