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• Merge (concat) all video file present in '43. DP (Part1)' and put it into '43. DP (Part1)' and give name merged (concat) file to folder name

  29 mars 2024, par Anu Mau

  I have parent folder alpha part 3 which contain child folder 43. DP (Part1), 44. DP (Part2), 45. DP (Part3).

  


  I want to merge (concat) all video file present in 43. DP (Part1) and put it into 43. DP (Part1) and give name merged (concat) file to folder name.

  


  And as it is do for all.

  


  alpha part 3
├── 43. DP (Part1)
│   ├── _43.1_Introduction to DP.mp4
│   ├── _43.2_What is DP_ (Definition).mp4
│   ├── _43.3_Ways of DP.mp4
│   ├── _43.4_7 Important Concepts.mp4
│   ├── _43.5_Climbing Stairs (Recursion).mp4
│   ├── _43.6_Climbing Stairs (Memoization DP).mp4
│   ├── _43.7_Climbing Stairs Variation.mp4
│   └── _43.8_Climbing Stairs (Tabulation DP).mp4
├── 44. DP (Part2)
│   ├── _44.1_Types of Knapsack problems.mp4
│   ├── _44.2_0-1 Knapsack (Recursion).mp4
│   ├── _44.3_0-1 Knapsack (Memoization).mp4
│   ├── _44.4_0-1 Knapsack (Tabulation).mp4
│   ├── _44.5_Target Sum Subset (Tabulation).mp4
│   ├── _44.6_Target Sum Subset (Code).mp4
│   └── _44.7_Unbounded Knapsack (Tabulation).mp4
├── 45. DP (Part3)
│   ├── _45.1_Coin Change (Live Class).mp4
│   ├── _45.2_Rod Cutting.mp4
│   ├── _45.3_Longest Common Subsequence (Recursion).mp4
│   ├── _45.4_LCS (Memoization).mp4
│   └── _45.5_LCS (Tabulation).mp4



  


  Right or is any way to go this at once. Write Python code with FFmpeg.

  


  My Python code is as follows ; what do I need to adjust ?

  


  import os
import subprocess

# Function to merge videos in a folder
def merge_videos_in_folder(folder_path):
    print(f"Merging videos in folder: {folder_path}")

    # Use FFmpeg to concatenate all video files within the folder
    cmd = [
        "ffmpeg",
        "-f", "concat",
        "-safe", "0",
        "-i", "<(find '{}' -type f -name '*.mp4' -exec echo 'file {{}}' \;)".format(folder_path),
        "-c", "copy",
        os.path.join(folder_path, "merged_video.mp4")
    ]
    subprocess.run(cmd, capture_output=True, text=True)

    print(f"Videos merged for folder: {folder_path}")

# Specify the directory containing folders with video files
parent_dir = "/path/to/parent_directory"

# Loop through each folder in the input directory
for folder in os.listdir(parent_dir):
    folder_path = os.path.join(parent_dir, folder)
    if os.path.isdir(folder_path):
        # Merge videos in the current folder
        merge_videos_in_folder(folder_path)

print("All videos merged successfully!")


  


• Convert audio file using another audio file as template in ffmpeg

  3 décembre 2015, par Iulian Onofrei

  I have some .mp3 audio files, with different "configuration" like sample rate, bit rate, etc.

  For my app, one of them is working and the rest, not.

  How can I convert the rest of them using the working file’s "configuration" ?

  Metadata of two sample files :

  ~/Downloads ❯ ffmpeg -i working.mp3 -i not_working.mp3
  
  ffmpeg version 2.8.3 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with Apple LLVM version 7.0.0 (clang-700.1.76)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
  
    libavutil      54. 31.100 / 54. 31.100
  
    libavcodec     56. 60.100 / 56. 60.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 40.101 /  5. 40.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  [mp3 @ 0x7fd2d380da00] Skipping 0 bytes of junk at 33.
  
  [mp3 @ 0x7fd2d380da00] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, mp3, from 'working.mp3':
  
    Metadata:
  
      encoder         : Lavf52.64.2
  
    Duration: 00:00:00.65, start: 0.000000, bitrate: 64 kb/s
  
      Stream #0:0: Audio: mp3, 22050 Hz, mono, s16p, 64 kb/s
  
  [mp3 @ 0x7fd2d4008800] Skipping 0 bytes of junk at 417.
  
  Input #1, mp3, from 'not_working.mp3':
  
    Duration: 00:00:01.83, start: 0.025057, bitrate: 46 kb/s
  
      Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 46 kb/s
  
      Metadata:
  
        encoder         : LAME3.99r

• Can I input a PHP file to ffmpeg ?

  6 avril 2023, par cantsay

  I want to use ffmpeg, but pass in a PHP file (which will perform some logic, and then output a video file).

  


  I know you can do this on webservers, i.e. create "image.jpg" but have it contain PHP code, and when someone visits it, it will run as a PHP script.

  


  If I run the PHP file, it outputs a video file, and if I pass a video file directly, the stream works so I know those parts are fine by themselves.

  


  However, I believe the issue is that the PHP file will never be processed as a PHP file, whereas a webserver would know that ? So do I need to somehow trick it or create an alias file or similar to process the PHP file and return the video output ?

  


  I thought maybe I could pass in a bash file, which runs the PHP script using the php command but that didn't work.

  


  I'm not sure what else to try or where to look