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• avformat/vividas : Error out on audio packets in the absence of audio streams

  5 novembre 2019, par Michael Niedermayer

  avformat/vividas : Error out on audio packets in the absence of audio streams
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/vividas.c

• audio issues when merging a video with an audio file using python ffmpeg and moviepy

  29 février 2024, par Stevenb123

  I’m trying to create a code that syncs between an audio file and a background file in terms of duration.
When creating the merged video I hear a cut or a loop sound of the last sentence for like 0.2 seconds.
I have tried to solve it in many different ways, listed below.

  


  Has anyone solved this issue ? I saw many people having a similar problem.
I’m using Ubuntu version 20.04 and ffmpeg version 4.2.7

  


  This is my code :

  


  def merge_videos_with_subs(
    background_path, audio_path, subs, output_directory, output_filename
):
    try:
        # Load background video and audio
        background_clip = VideoFileClip(background_path)
        background_clip = background_clip.without_audio()
        audio_clip = AudioFileClip(audio_path)

        # Adjust video duration to match audio duration
        audio_duration = audio_clip.duration

        # If the background video is longer, trim it to match the audio duration
        if background_clip.duration > audio_duration:
            background_clip = background_clip.subclip(0, audio_duration)
        # If the audio is longer, loop the background video
        else:
            background_clip = background_clip.loop(duration=audio_duration)

        # Set audio of the background clip
        background_clip = background_clip.set_audio(audio_clip)

        # Overlay subtitles on the video
        final_clip = CompositeVideoClip(
            [background_clip, subtitles.set_pos(("center", "bottom"))]
        )

        # Ensure the output directory exists
        os.makedirs(output_directory, exist_ok=True)

        # Define the output path
        output_path = os.path.join(output_directory, output_filename)

        # Write the merged video with subtitles
        final_clip.write_videofile(
            output_path, codec="libx264", audio_codec="aac", threads=4, fps=24
        )

        # Close the clips
        final_clip.close()
        background_clip.close()
        audio_clip.close()

        print(f"Merged video with subtitles saved to: {output_path}")
    except Exception as e:
        print(f"Error merging videos: {e}")


  


  I’ve tried changing the codec, tried cutting 0.2 seconds of the audio before and after the merge or silencing it, nothing seems to help.
  
When I run my code without the background subclip to match the audio it worked flawlessy.
If I let the background run until its full duration or make it loop there were no audio issues.
  
Looks like the issue is on the cutting part.

  


• Encoding audio to matroska container using ffmpeg audio encoder adpcm_adx

  22 octobre 2019, par Narek Aydinyan

  Trying to reencode audio file from mp4 container to Matroska(mkv) container using FFmpeg audio encoder adpcm_adx or (aptx, comfortnoise, g726le...) I am getting an error message

  No wav codec tag found for codec ...

  I have c++ code which includes thired-party integration of ffmpeg,
  and I am having the same result using ffmpeg terminal options.

  ffmpeg -i file.mp4 -c:v copy -c:a adpcm_adx -b:a 44100 output.mkv

  Instead of getting output file correctly I am getting

  No wav codec tag found for codec adpcm_adx
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
  
  Error initializing output stream 0:0 -- Conversion failed!

  Maybe I should specify extra parameters for making it work which I haven’t hooked up yet.
  Thanks in advance.
  I’ll appreciate any help.