Recherche avancée

Sur d’autres sites (14984)

• ffmpeg video is bugged when burning PGS subtitles from .mkv to .webm

  27 août 2022, par ahab1851

  I am trying to burn PGS subtitles into a WebM clip (I am converting .mkv file with PGS subtitles into a .webm file), but when I do that, the clip becomes bugged : the length of the clip is 1193 hours and I can't seek the clip.

  


  Here's my ffmpeg command :

  


  ffmpeg -hide_banner -i out.mkv -sws_flags lanczos+accurate_rnd+full_chroma_int \
-filter_complex "[0:v][0:s]overlay[v1]; [v1]crop=1920:804:0:138, \
colorspace=bt709:iall=bt601-6-625:fast=1,scale=1280:-2[v2]" \
-map "[v2]" -map 0:1 -minrate 320k -maxrate 1300k -b:v 640k \
-pix_fmt yuv420p10le -colorspace 1 -color_range 1 -color_primaries 1 \
-color_trc 1 -tile-columns 0 -g 240 -aq-mode 0 -threads 2 \
-deadline good -crf 32 -c:v libvpx-vp9 -pass 1 -cpu-used 2 -row-mt 1 -an -sn -f webm -

ffmpeg -hide_banner -i out.mkv -sws_flags lanczos+accurate_rnd+full_chroma_int \
-filter_complex "[0:v][0:s]overlay[v1]; [v1]crop=1920:804:0:138, \
colorspace=bt709:iall=bt601-6-625:fast=1,scale=1280:-2[v2]" \
-map "[v2]" -map 0:1 -minrate 320k -maxrate 1300k -b:v 640k \
-pix_fmt yuv420p10le -color_range 1 -colorspace 1 -color_primaries 1 \
-color_trc 1 -tile-columns 0 -auto-alt-ref 1 -lag-in-frames 25 -g 240 \
-aq-mode 0 -threads 1 -deadline good -crf 32 -c:v libvpx-vp9 -pass 2 \
-cpu-used 0 -row-mt 1 -an -sn -map_metadata -1 -f webm output.webm


  


  Thanks.

  


• How to Convert 16:9 Video to 9:16 Ratio While Ensuring Speaker Presence in Frame ?

  28 avril 2024, par shreesha

  I am tried so many time to figure out the problem in detecting the face and also it's not so smooth enough to like other tools out there.

  


  So basically I am using python and Yolo in this project but I want the person who is talking and who the ROI (region of interest) is.

  


  Here is the code :

  


  from ultralytics import YOLO
from ultralytics.engine.results import Results
from moviepy.editor import VideoFileClip, concatenate_videoclips
from moviepy.video.fx.crop import crop

# Load the YOLOv8 model
model = YOLO("yolov8n.pt")

# Load the input video
clip = VideoFileClip("short_test.mp4")

tacked_clips = []

for frame_no, frame in enumerate(clip.iter_frames()):
    # Process the frame
    results: list[Results] = model(frame)

    # Get the bounding box of the main object
    if results[0].boxes:
        objects = results[0].boxes
        main_obj = max(
            objects, key=lambda x: x.conf
        )  # Assuming the first detected object is the main one

        x1, y1, x2, y2 = [int(val) for val in main_obj.xyxy[0].tolist()]

        # Calculate the crop region based on the object's position and the target aspect ratio
        w, h = clip.size
        new_w = int(h * 9 / 16)
        new_h = h

        x_center = x2 - x1
        y_center = y2 - y1

        # Adjust x_center and y_center if they would cause the crop region to exceed the bounds
        if x_center + (new_w / 2) > w:
            x_center -= x_center + (new_w / 2) - w
        elif x_center - (new_w / 2) < 0:
            x_center += abs(x_center - (new_w / 2))

        if y_center + (new_h / 2) > h:
            y_center -= y_center + (new_h / 2) - h
        elif y_center - (new_h / 2) < 0:
            y_center += abs(y_center - (new_h / 2))

        # Create a subclip for the current frame
        start_time = frame_no / clip.fps
        end_time = (frame_no + 1) / clip.fps
        subclip = clip.subclip(start_time, end_time)

        # Apply cropping using MoviePy
        cropped_clip = crop(
            subclip, x_center=x_center, y_center=y_center, width=new_w, height=new_h
        )

        tacked_clips.append(cropped_clip)

reframed_clip = concatenate_videoclips(tacked_clips, method="compose")
reframed_clip.write_videofile("output_video.mp4")


  


  So basically I want to fix the face detection with ROI detection where it can detect the face and make that face and the body on to the frame and making sure that the speaker who is speaking is brought to the frame

  


• Moviepy subclip captures extra 4 seconds at the end

  18 juillet 2021, par Fazal

  Iam trying to clip a video and save the clipped video. In this case the first 5 seconds of the video. While the video is getting clipped correctly. However the length of the clipped video is still 9 seconds instead of 5 seconds. For some reason an addition 4 seconds keep getting added with no content. Can someone help me with this. I tried to read through various topics on the issue but couldnt figure out.

  


  # Import everything needed to edit video clips
from moviepy.editor import *
from moviepy.video.io.ffmpeg_tools import ffmpeg_extract_subclip
# loading video dsa gfg intro video
clip = VideoFileClip("file.mp4")

filename = "fileclipped.mp4"
ffmpeg_extract_subclip("file.mp4", 0, 5, targetname=filename)