Recherche avancée

Sur d’autres sites (9533)

• FFmpeg : How to add shadow overlay at the bottom of the video ?

  18 décembre 2019, par ArmKh

  I need to add a little shadow at the bottom of the video.

  Initial video

  

  Expected result

  

  The one version for doing this is to have the shadow (.png) image which will be added to the video as an overlay. But I thought, is there any way to do it without a shadow image ?

• avcodec/mp3 : fix skipping zeros

  30 septembre 2015, par wm4

  avcodec/mp3 : fix skipping zeros
  Commits 43bc5cf9 and c5371f77 add code for skipping initial zeros in mp3
  
  packets. This code forgot to report to the user that data was skipped at
  
  all.
  Since audio codecs allow partial packet decoding, the user application
  
  has to rely on the return value. It will remove the data reported as
  
  consumed by the decoder, and feed it to the decoder again. This resulted
  
  in the mp3 frame after the zero region to be decoded over and over
  
  again, until the zero region was finally skipped by the application.
  Fix this by including the amount of skipped bytes to the number of
  
  consumed bytes returned by the decode call.
  Fixes trac ticket #4890.
  

  • [DH] libavcodec/mpegaudiodec_template.c

• FFmpeg with S3 and AWS lambda

  19 mai 2023, par Hemant Rawat

  import boto3
import subprocess
import os
import re

s3_client = boto3.client('s3')

def lambda_handler(event, context):
    try:
        input_bucket_name = event['input_bucket_name']
        output_bucket_name = event['output_bucket_name']
        input_file_name = event['input_file_name']
        output_file_name = event['output_file_name']
        start_time = event['start_time']
        end_time = event['end_time']
        padding_image_file  = event['padding_image_file']
        video_scale = event['video_scale']
        video_overlay_x = event['video_overlay_x']
        video_overlay_y = event['video_overlay_y']
        subtitles_file = event['subtitles_file']

        input_file = '/tmp/' + input_file_name
        trimmed_file = '/tmp/trimmed_' + input_file_name
        output_file = '/tmp/' + output_file_name

        s3_client.download_file(input_bucket_name, input_file_name, input_file)

    except Exception as e:
        print(f'Error during initial setup: {e}')
        return

    try:
        trim_video(input_file, trimmed_file, start_time, end_time)
    except Exception as e:
        print(f'Error during trimming video: {e}')
        return

    try:
        add_subtitles_with_padding(trimmed_file, padding_image_file, video_scale, video_overlay_x, video_overlay_y, subtitles_file, output_file)
    except Exception as e:
        print(f'Error during adding subtitles and padding: {e}')
        return

    if os.path.isfile(trimmed_file):
        os.remove(trimmed_file)

    if not os.path.isfile(output_file):
        print(f'Output file not found: {output_file}')
        return

    try:
        s3_client.upload_file(output_file, output_bucket_name, output_file_name)
    except Exception as e:
        print(f'Error during upload: {e}')
        return

def execute_command(cmd):
    process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
    stdout, stderr = process.communicate()
    
    if process.returncode != 0:
        raise Exception(f'Error executing {cmd}: {stderr.decode()}')
    
    return stdout.decode()


def trim_video(input_file, output_file, start_time, end_time):
    cmd = [
        '/opt/ffmpeglib/ffmpeg', '-i', input_file, '-ss', start_time, '-to', end_time, '-c', 'copy', output_file
    ]

    try:
        result = subprocess.run(cmd, capture_output=True, text=True)
        result.check_returncode()
        print(f'Successfully trimmed {input_file} and saved the result to {output_file}')
    except subprocess.CalledProcessError as e:
        print(f'Error during trimming video: {e.stderr}')
        raise


def add_subtitles_with_padding(input_file, padding_image_file, video_scale, video_overlay_x, video_overlay_y, subtitles_file, output_file):
    cmd = [
        '/opt/ffmpeglib/ffmpeg', '-i', input_file, '-i', padding_image_file, '-filter_complex', 
        f"[0:v]scale=iw/{video_scale}:ih/{video_scale},setsar=1[main];\
        [1:v]scale=720:1280[pad];\
        [pad][main]overlay={video_overlay_x}:{video_overlay_y},\
        subtitles={subtitles_file}:force_style='Alignment=2,OutlineColour=&H100000000,BorderStyle=3,Outline=1,Shadow=0,Fontsize=10,MarginL=2,MarginV=20'",
        '-c:v', 'libx264', '-crf', '1', '-preset', 'medium', '-b:v', '1M', '-c:a', 'aac', '-b:a', '256k', '-movflags', '+faststart', '-y', output_file
    ]

    try:
        result = subprocess.run(cmd, capture_output=True, text=True)
        result.check_returncode()
        print(f'Successfully processed {input_file} and saved the result to {output_file}')
    except subprocess.CalledProcessError as e:
        print(f'Error during adding subtitles and padding: {e.stderr}')
        raise



  


  I'm getting this error can anybody help I'have been stuck in this for a week now and still not getting the solution right now i'm stuck at this error :-

  


  


  Error during initial setup : An error occurred (403) when calling the
HeadObject operation : Forbidden END RequestId :
29caa5b4-fbe0-4e45-af4f-7bde42393235

  


  


  Even though i have provided all the necessary permission from the IAM role.