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• SOLVED ffmpeg english subtitle is missing from converted .mkv file

  4 juin 2020, par horace

  I downloaded some .mkv files and tried to play them in my Roku using the Roku media player. There was no audio but 2 subtitle files were available 0=German 1=English.
I converted the file using ffmpeg -i oldfile.mkv -c:v copy -c:a mp3 newfile.mkv
Now when i play the file with Roku media player the audio is fine, but only the default subtitle is available and it is German.
I have tried to use -c:s to change the subtitle but I don't know what to command to use.
I finally solved my problem after reading a lot of posts with questions and answers I didn't understand and trying many, many scripts.
I found there were only 4 streams in a file video, audio and 2 subtitles
the script that worked is :
ffmpeg -i oldfile.mkv -map 0:v -map 0:a -map 0:s ? -c:v copy -c:a mp3 -c:s copy newfile.mkv
This way the audio is converted to mp3 and both subtitles are perserved.

  


• Discord theme songs [kinda solved]

  5 septembre 2020, par SweLG

  I want to give some of my friends theme songs and I have been able to do it using the code below

  


  @commands.Cog.listener()
    async def on_voice_state_update(ctx, member, before, after):
        if member.name in theme_songs.keys():
            voice = await member.voice.channel.connect()
            voice.play(discord.FFmpegPCMAudio(source=f"theme_songs/{theme_songs[member.name]}"))


  


  The problem is the bot is activated every time something happens, i.e. muting, going live etc.
How could i make it so that it only looks for member joining ?

  


  Edit

  


  I found one way to solve it, by adding

  


   if before.channel != after.channel:


  


  It becomes

  


  @commands.Cog.listener()
async def on_voice_state_update(self, member, before, after):
    if before.channel != after.channel:
        if member.name in theme_songs.keys():
            voice = await after.channel.connect()
            voice.play(discord.FFmpegPCMAudio(source=f"theme_songs/{theme_songs[member.name]}"))


  


  This isn't a perfect solution, but it works for now

  


• SOLVED ffmpeg : consider increasing probesize error, but it is never satisfied

  27 octobre 2020, par Jaz

  I was trying to use an Arch solution for streaming to twitch today through FFMPEG, but all of my attempts were in vain because of one simple thing on FFMPEG. it says that the probesize is not large enough, so I instinctively increased the probesize value more and more... and now it is -probesize "500M" yet it is still saying it is not enough. here is the code snippet

  


  [x11grab @ 0x5631f846cd00] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, x11grab, from ':0.0':
  Duration: N/A, start: 1603397505.341400, bitrate: 1007124 kb/s
    Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1366x768, 1007124 kb/s, 30 fps, 1000k tbr, 1000k tbn, 1000k tbc
0: Input/output error


  


  and the code

  


  #!/bin/bash
     INRES="1366x768" # input resolution
     OUTRES="1366x768" # output resolution
     FPS="30" # target FPS
     GOP="60" # i-frame interval, should be double of FPS,
     GOPMIN="30" # min i-frame interval, should be equal to fps,
     THREADS="2" # max 6
     CBR="1000k" # constant bitrate (should be between 1000k - 3000k)
     QUALITY="ultrafast"  # one of the many FFMPEG preset
     AUDIO_RATE="44100"
     PROBESZ="500M" # specify a size for the ffmpeg tool to assess frames
     STREAM_KEY="$1" # paste the stream key after calling stream_now
     SERVER="live-mia" # twitch server in miami Florida, see https://stream.twitch.tv/ingests/ for list

     ffmpeg -f x11grab -s "$INRES" -r "$FPS" -i :0.0 -f pulse -i 0 -f flv -ac 2 -ar $AUDIO_RATE \
       -vcodec libx264 -g $GOP -keyint_min $GOPMIN -b:v $CBR -minrate $CBR -maxrate $CBR -pix_fmt yuv420p\
       -s $OUTRES -preset $QUALITY -tune film -acodec aac -threads $THREADS -strict normal \
       -bufsize $CBR -probesize $PROBESZ "rtmp://$SERVER.twitch.tv/app/$STREAM_KEY"


  


  even though it was a solution to store in .bashrc, I stored it in a script to call manually.

  


  and if this is helpful, here is the fancy banner ffmpeg shows before the error

  


  ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 10.1.0 (GCC)
  configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-avisynth --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librav1e --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-nvdec --enable-nvenc --enable-omx --enable-shared --enable-version3
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100