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• The .mp4 video does not play, which is created from ffmpeg library (not command line)

  25 septembre 2013, par user1914692

  I use ffmpeg library to encode frames to a .mp4 video. The program runs smoothly without error. But the output .mp4 video does not play. Properties of the file does not even show it is a video file, no any information of video stream.

  The related code is :

  const char* ouVideoFileName = "output.mp4";
  
  AVCodecID ouCodec_id = CODEC_ID_H264;

  But if I change it to :

  const char* ouVideoFileName = "output.avi";
  
  AVCodecID ouCodec_id = CODEC_ID_H264;

  The .avi video plays correctly.

  What's wrong with .mp4 video ?

• ffmpeg video will not play in browser

  27 janvier 2018, par Red

  I’m trying to create a simple video with an image and some audio using this command :

  ffmpeg -loop 1 -framerate 2 -i image.jpg -i audio.mp3 -c:v libx264 -c:a aac -strict -2 -preset medium -tune stillimage -crf 0 -shortest -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" -pix_fmt yuv420p -movflags +faststart output.mp4

  But the resulting video will not play in latest firefox, though it will play in chrome 63.

  ffmpeg stats :

  ffmpeg version 3.4.1-1+b1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 7 (Debian 7.2.0-18)
  
    configuration: --prefix=/usr --extra-version=1+b1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  Hyper fast Audio and Video encoder

  Any ideas ?

• Discord FFMPEG audio wont play from yt-dlp

  19 mars 2023, par user21236822

  My question is this : Why isn't my bot playing audio ?

  


  I want the bot to join, play audio from queue, then disconnect without downloading an mp3 file.

  


  I tried using youtube-dl, but I switched to the yt-dlp library after getting errors I couldn't fix.
I am running on Windows 10 locally. All my libraries are up to date.

  


  Here are my ydl_opts and FFMPEG_OPTS :

  


  ydl_opts = {
    'format': 'bestaudio/best',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'mp3',
        'preferredquality': '192',
    }],
}

FFMPEG_OPTIONS = {
    'before_options': '-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5',
    'options': '-vn'
} 


  


  Here is where I believe the problem is.

  


  async def play():
    print("Play Called")
    musicPlay()
    # Get message object from initial request
    message = ytLinkQue.get()
    print(f"Message object recieved: {message}")
    voiceChannel = message.author.voice.channel
    vc = await voiceChannel.connect()
    songsPlayed = 0
    
    while not ytLinkQue.empty():
        # Get current song
        currentSong = ytLinkQue.get()[0]
        print(f"Current song: {currentSong}")

        # Get song from Youtube
        with yt_dlp.YoutubeDL(ydl_opts) as ydl:
            # song = ydl.download(currentSong)
            info = ydl.extract_info(currentSong, download=False)
            song = info['formats'][0]['url']

        # Play Song
        vc.play(discord.FFmpegPCMAudio(song, **FFMPEG_OPTIONS), after=lambda e: print('Song done'))

        # Wait until the song has finished playing
        while vc.is_playing():
            print("playing rn")
            await asyncio.sleep(1)
    
    await vc.disconnect()
    musicStop()


  


  When play() is called, here is the output in terminal with my annotations as **** text **** :

  


  >python main.py&#xA;2023-02-17 15:21:09 INFO     discord.client logging in using static token&#xA;2023-02-17 15:21:10 INFO     discord.gateway Shard ID None has connected to Gateway (Session ID: 60b9fce14faa5daa4aed9eb6db01a74d).&#xA;Max que: 50&#xA;Text Channel: 828698708123451434&#xA;Testing Bot#4591 is ready.&#xA;Passing message object&#xA;**** play() funciton is called ****&#xA;Play Called&#xA;Message object recieved: <message channel="<TextChannel" position="7" nsfw="False" news="False"> type= author=<member discriminator="&#x27;0199&#x27;" bot="False" nick="&#x27;Fragnk7?&#x27;" guild="<Guild" chunked="True">> flags=<messageflags value="0">>&#xA;2023-02-17 15:21:16 INFO     discord.voice_client Connecting to voice...&#xA;2023-02-17 15:21:16 INFO     discord.voice_client Starting voice handshake... (connection attempt 1)&#xA;2023-02-17 15:21:17 INFO     discord.voice_client Voice handshake complete. Endpoint found seattle2004.discord.media&#xA;Current song: https://www.youtube.com/watch?v=vcAp4nmTZCA&#xA;[youtube] Extracting URL: https://www.youtube.com/watch?v=vcAp4nmTZCA &#xA;[youtube] vcAp4nmTZCA: Downloading webpage &#xA;[youtube] vcAp4nmTZCA: Downloading android player API JSON &#xA;**** Does not play any audio ****&#xA;Playing rn&#xA;Song done&#xA;2023-02-17 15:21:18 INFO     discord.player ffmpeg process 20700 successfully terminated with return code of 1.&#xA;2023-02-17 15:21:19 INFO     discord.voice_client The voice handshake is being terminated for Channel ID 400178308467392513 (Guild ID 261601676941721602)&#xA;2023-02-17 15:21:19 INFO     discord.voice_client Disconnecting from voice normally, close code 1000.&#xA;</messageflags></member></message>

  


  On Discord's end, the bot successfully connects then disconnects after 2 second.

  


  Note : I've only included code I think is relevant. Please let me know if I should add anything else to the post, otherwise, here is the github for the project. Code is in main.py.
https://github.com/LukeLeimbach/wallMomentMusic

  


  Thank you in advance !

  


  I've applied the advice from these posts but it still will not play audio :

  


  -https://stackoverflow.com/questions/45770016/how-do-i-make-my-discord-bot-play-audio-from-youtube

  


  -https://stackoverflow.com/questions/66070749/how-to-fix-discord-music-bot-that-stops-playing-before-the-song-is-actually-over?newreg=c70dd786cf5844e490045494223c0381

  


  -https://stackoverflow.com/questions/57688808/playing-music-with-a-bot-from-youtube-without-downloading-the-file