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• ffmpeg started with initial_pause won't play

  25 janvier 2015, par ComputerSaysNo

  I need to :

  • connect to RTSP server
  • send all RTSP commands except PLAY(hence the ’initial_pause’ option)
  • send custom packet to server via GET_PARAMETER command
  • send PLAY command <- this does not work

  I am successfully sending and receiving data using ffurl_write/read, after which I’m sending av_read_play(context) <- this is being sent correctly and receives response(network sniffer says so), however, ffmpeg is not able to find the video codec for some reason, error :

  [rtsp @ 0x7fff0a858800] Could not find codec parameters for stream 0 (Video : h264) : unspecified size
  Consider increasing the value for the ’analyzeduration’ and ’probesize’ options

  I did increase the probsize and analyzeduration to obscene values without luck.

  My question is : how can I resume/play the stream, what am I missing ?

  Feel free to ask any additional questions that may help in finding the issue.

• FFmpeg doesn't play any audio through Discord.py BOT

  12 mai 2019, par Lewis H

  Here is my code for my Discord bot’s play function :

  @bot.command()
  
  async def play(ctx, url:str = None): # DOESN'T WORK, DOWNLOADS BUT DOESN'T PLAY
  
  
  
          ...
  
  
  
          ytdl_options = {
  
              'format': 'bestaudio/best',
  
              'postprocessors': [{
  
                  'key': 'FFmpegExtractAudio',
  
                  'preferredcodec': 'mp3',
  
                  'preferredquality': '192',
  
              }],
  
          }
  
          ytdl = youtube_dl.YoutubeDL(ytdl_options)
  
  
  
          loop = asyncio.get_event_loop()
  
          data = await loop.run_in_executor(None, lambda: ytdl.extract_info(url))
  
  
  
  
  
          if 'entries' in data:
  
              data = data['entries'][0] # taking top item from a YT playlist
  
  
  
          source = ytdl.prepare_filename(data)
  
  
  
          vc.play(discord.FFmpegPCMAudio(source)) #play audio
  
          print(vc.is_playing())
  
          await ctx.send("Now playing: " + data.get('title')) #now playing
  
          asyncio.sleep(3)
  
          print(vc.is_playing())

  When I call the function, it runs fine and downloads the video from youtube-dl, then sends the message "Now playing : X", but doesn’t play any audio.

  I added the two print(vc.is_playing()) lines and what is returned in the shell is :

  True
  
  False

  So clearly it tries to play the song but immediately fails.

  There are no exceptions thrown, so I can’t understand why FFmpeg doesn’t want to play the audio.

• Infrequent ffmpeg in Google Cloud

  17 février 2020, par suztomo

  Which service should I use for my Go program that runs ffmpeg in Google Cloud Platform ?

  The Go program downloads videos from my Google Cloud Storage and runs ffmpeg command to combine them into 5 minutes mp4 file. I use this program only around 10 times in a month.

  I thought of using a compute instance with GPU to get fast ffmpeg processing. However, because of infrequency of the invocation, I don’t want to run the pricey GPU instance for all the time. Cloud Run does not seem to support GPU.

  What service would you choose for such workload ?