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• Convert form 30 to 60fps by increasing speed, not duplicating frames, using FFmpeg

  12 août 2018, par Matt Pellegrini

  I have a video that is incorrectly labelled at 30fps, it is actually 60fps and so looks like it’s being played at half speed. The audio is fine, that is, the soundtrack finishes half way through the video clip. I’d like to know how, if possible to fix this, that is double the video speed, making it 60fps and meaning that the audio and video are synced.

  The file is H.264 and the audio MPEG-4 AAC.

  File details as given by ffmpeg, as requested :

  ffmpeg version 0.8.9-6:0.8.9-0ubuntu0.13.10.1, Copyright (c) 2000-2013 the Libav developers
  
  built on Nov  9 2013 19:09:46 with gcc 4.8.1
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './Tignes60fps.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2014-01-13 02:23:09
  
      Duration: 00:08:33.21, start: 0.000000, bitrate: 5690 kb/s
  
      Stream #0.0(eng): Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 5609 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
  
  Metadata:
  
      creation_time   : 2014-01-13 02:23:09
  
      Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 156 kb/s
  
  Metadata:
  
        creation_time   : 2014-01-13 02:23:09
  
  At least one output file must be specified

• I want to create the discord bot by use python，but ffmpeg always had problem

  12 décembre 2023, par Bot

  async def play(ctx, *, song_name):  

    if ctx.author.voice is None or ctx.author.voice.channel is None:
        await ctx.send("nobody")
        return

    voice_channel = ctx.author.voice.channel
    channel = None
    if ctx.voice_client is None:
        channel = await voice_channel.connect()
    else:
        await ctx.voice_client.move_to(voice_channel)

    ydl_opts = {'format': 'bestaudio'}
    videosSearch = VideosSearch(song_name, limit=1) 
    results = videosSearch.result()
    
    url = results['result'][0]['link']
    
    if voice_channel.guild.id in queues:
        queues[voice_channel.guild.id].append(url)
        
    else:
        queues[voice_channel.guild.id] = [url]
        
    if not ctx.voice_client.is_playing():
        await play_next(ctx.voice_client, voice_channel.guild.id)


  


  ffmpeg has this error detail :

  


  discord.player ffmpeg process 17656 successfully terminated with return code of 3199971767.

  


  I found the internet ,lots of people got the code of 1 or -1.

  


  But i get 3199971767 ,i don't know the meaning of this.

  


  BTW, my url is correct.

  


  Hoping someone can help me.

  


  TY

  


• dnxhddec : decode and use interlace mb flag

  25 septembre 2015, par Christophe Gisquet

  dnxhddec : decode and use interlace mb flag
  This bit is 1 in some samples, and seems to coincide with interlaced
  
  mbs and CID1260. 2008 specs do not know about it, and maintain qscale
  
  is 11 bits. This looks oversized, but may help larger bitdepths.
  Currently, it leads to an obviously incorrect qscale value, meaning
  
  its syntax is shifted by 1. However, reading 11 bits also leads to
  
  obviously incorrect decoding : qscale seems to be 10 bits.
  However, as most profiles still have 11bits qscale, the feature is
  
  restricted to the CID1260 profile.
  The encoder writes 12 bits of syntax, last and first bits always 0,
  
  which is now somewhat inconsistent with the decoder, but ends up with
  
  the same effect (progressive + reserved bit).
  Partially fixes ticket #4876.
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/dnxhddec.c