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• What are the encoding techniques to be used while creating 3gp videos on iPhone

  23 avril 2013, par Mahesh

  Some converted 3gp video using ffmpeg library, played on iphone and some not played and that all video played on android,blackberry and J2ME without issues.

  1. please suggest to what type of encoding to be used while creating 3gp videos which is play in iphone without issues.

• How to merge a video vertically by taking specific time slots from two different videos with a single ffmpeg command ?

  29 mars 2019, par Krishna CCK

  I have three ffmpeg commands. Two of those commands will trim the input videos and the third will merge into a single video.

  I want to run them as a single command instead of three, which consumes a lot of time because I’m taking output of the 1st and 2nd videos individually.

  Instead, I want to take specific parts from the videos which I need and merge them as a single video.

  The commands which I use for singie videos trim :-

  ffmpeg -y -i video1.mp4 -ss 4 -t 10000 -qscale:v 8 -strict -2 video1out.mp4
  
  
  
  ffmpeg -y -i video2.mp4 -ss 4 -t 10000 -qscale:v 8 -strict -2 video2out.mp4
  
  
  
  ffmpeg -i video1out.mp4 -i video2out.mp4 -filter_complex vstack -strict -2 merge.mp4

• yt_dlp gives a strange message : "Seek to desired resync point failed. Seeking to earliest point available instead." and "File ended prematurely"

  16 septembre 2023, par nikita goncharov

  I have a discord bot (discord.py) in python and it can play music. Lastly it had trouble in playing the music, giving some random warnings but it mostly worked. But now it gives me this message :

  


  [matroska,webm @ 000001570fe92d40] Seek to desired resync point failed. Seeking to earliest point available instead.


  


  [matroska,webm @ 000001570fe92d40] File ended prematurely


  


  and also this one

  


  Warning: program compiled against libxml 211 using older 209


  


  As I saw this is a very common warning but I still have no Idea how to fix it.

  


  I will leave the code of the bot down bellow :

  


  Ytdlp setup (I have renamed the librarie to be youtube_dl)

  


  youtube_dl.utils.bug_reports_message = lambda: ''


ytdl_format_options = {
    'format': 'bestaudio/best',
    'outtmpl': '%(extractor)s-%(id)s-%(title)s.%(ext)s',
    'restrictfilenames': True,
    'noplaylist': True,
    'nocheckcertificate': True,
    'ignoreerrors': False,
    'logtostderr': True,
    'quiet': True,
    'no_warnings': False,
    'default_search': 'auto',
    'source_address': '0.0.0.0',  # bind to ipv4 since ipv6 addresses cause issues sometimes
}

ffmpeg_options = {
    'options': '-vn',
}

ytdl = youtube_dl.YoutubeDL(ytdl_format_options)


class YTDLSource(discord.PCMVolumeTransformer):
    def __init__(self, source, *, data, volume=0.5):
        super().__init__(source, volume)

        self.data = data

        self.title = data.get('title')
        self.url = data.get('url')
        self.duration = data.get('duration')
        img = ""
        imgs = ['']
        for image in data.get("thumbnails"):
            img = image["url"]
            imgs.append(image["url"])
        self.image = img
        self.thumbnails = imgs


  


  The play command :

  


  # if message.author.voice_client is not None:
try:
    print(1)
    sessionChannel = message.author.voice.channel
except:
    embedAns = discord.Embed(color=discord.Color.from_rgb(255, 201, 115))
    # embedImg.set_image(url=player.image)
    # embedImg.type = "image"
    embedAns.add_field(name="Player", value=f'To play audio you must join a voice channel!',
                       inline=True)
    embedAns.add_field(name="", value=f'*{message.author.name}*', inline=False)
    # embedImg.image.width = "800"
    await message.channel.send(embed=embedAns)
try:
    print(2)
    await message.author.voice.channel.connect(reconnect=False)
    print(2)
except:
    pass
"""embedAns = discord.Embed(color=discord.Color.from_rgb(102, 196, 250))
# embedImg.set_image(url=player.image)
# embedImg.type = "image"
embedAns.add_field(name="Player", value=f'Succesfuly joined voice channel to play music in {sessionChannel}! Loading in youtube song... Please wait...', inline=True)
embedAns.add_field(name="", value=f'*{message.author.name}*', inline=False)
# embedImg.image.width = "800"
await message.channel.send(embed=embedAns)"""
try:
    print(3)
    load = await message.channel.send(
        f'Succesfuly joined voice channel to play music in {sessionChannel}')
    print(4)
    url = matched.group(1)
    player = await YTDLSource.from_url(url, loop=client.loop, stream=True)
    # Embed = await YTDLSource.from_url(url, loop=client.loop, stream=False)
    sessionChannel.guild.voice_client.play(player, after=lambda e: print(
        f'Player error: {e}') if e else None)
    await load.delete()
    sec = player.duration % 60
    temp = player.duration // 60
    min = temp % 60
    hour = temp // 60
    if hour == 0:
        timeStr = f"{min:02d}:{sec:02d}"
    else:
        timeStr = f"{hour}:{min:02d}:{sec:02d}"
    # await message.reply()
    embedImg = discord.Embed(color=discord.Color.from_rgb(102, 196, 250))
    # embedImg.set_image(url=player.image)
    # embedImg.type = "image"
    embedImg.set_thumbnail(url=player.image)
    embedImg.add_field(name="Player", value=f'Now playing: **{player.title}** \n `{timeStr}`',
                       inline=True)
    embedImg.add_field(name="", value=f'Requested by: {message.author.name}', inline=False)
    # embedImg.image.width = "800"
    await message.channel.send(embed=embedImg)
except Exception as ex:
    embedAns = discord.Embed(color=discord.Color.from_rgb(255, 119, 115))
    # embedImg.set_image(url=player.image)
    # embedImg.type = "image"
    # embedImg.set_thumbnail(url=player.image)
    embedAns.add_field(name="Player Error",
                       value=f'Couldent play audio on {sessionChannel} \n`{ex}`', inline=True)
    embedAns.add_field(name="", value=f'Requested by: {message.author.name}', inline=False)