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• ffmpeg failing when using discord.py

  4 avril 2021, par E. Z. L.

  I was making a bot with a rickrolling feature. It involves ffmpeg, but it always gives the following error :

  


  FFmpeg version SVN-r18639, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --enable-memalign-hack --enable-postproc --enable-gpl --enable-libfaac --enable-libfaad --enable-libgsm --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libx264 --enable-libxvid --disable-ffserver --enable-avisynth --enable-pthreads
  libavutil     50. 3. 0 / 50. 3. 0
  libavcodec    52.27. 0 / 52.27. 0
  libavformat   52.32. 0 / 52.32. 0
  libavdevice   52. 2. 0 / 52. 2. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Apr 21 2009 13:44:38, gcc: 4.2.4 (TDM-1 for MinGW)
Input #0, mp3, from 'rick.mp3':
  Duration: 00:03:33.10, start: 0.000000, bitrate: 192 kb/s
    Stream #0.0: Audio: mp3, 44100 Hz, stereo, s16, 192 kb/s
Expected number for loglevel but found: warning


  


  It keeps giving this error even when I switched to a different file, am I doing anything wrong ? I'm on Windows python 3.8.2, discord.py 1.6.0. Here is the code section :

  


  @bot.command(name="rickroll")
async def rick(ctx, channel: discord.VoiceChannel):
    connection = await channel.connect()
    connection.play(discord.FFmpegPCMAudio("rick.mp3", executable="ffmpeg.exe"))


  


• ffmpeg xfade not working well with acrossfade

  7 juin 2021, par Richard

  I'm having trouble using xfade together with acrossfade.

  


  I have two videos t1.mp4 and t2.mp4 of same fps, resolution and so on. Both videos are 15 seconds long.

  


  Now I want a one-second fade transition in between.

  


  Without acrossfade,

  


  ffmpeg -i t1.mp4 -i t2.mp4 -filter_complex "xfade=transition=fade:duration=1:offset=14,format=yuv420p" output.mp4


  


  after checking all the frames, the transition looks good. There are some overlapped frames with fading effect.
Please see below two consecutive frames.


  


  But the second part of the result has no audio, that's why I decide to use acrossfade.

  


  ffmpeg -i t1.mp4 -i t2.mp4 -filter_complex "xfade=transition=fade:duration=1:offset=14,format=yuv420p;acrossfade=d=1" output.mp4


  


  Now it seems the transition effect is incomplete, there are less overlapped frames with fading effect, and the transition is sharp. Please see below two consecutive frames, same frame nubmer as above.


  


  What am I missing here please ?

  


   ffmpeg -i t1.mp4 -i t2.mp4 -filter_complex "xfade=transition=fade:duration=1:offset=14,format=yuv420p;acrossfade=d=1" output.mp4
ffmpeg version 4.3.1-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
  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
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 't1.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:00:15.02, start: 0.000000, bitrate: 2447 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 2315 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 't2.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:00:15.02, start: 0.000000, bitrate: 1643 kb/s
    Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 1509 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 (h264) -> xfade:main
  Stream #0:1 (aac) -> acrossfade:crossfade0
  Stream #1:0 (h264) -> xfade:xfade
  Stream #1:1 (aac) -> acrossfade:crossfade1
  format -> Stream #0:0 (libx264)
  acrossfade -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[libx264 @ 0x5963dc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x5963dc0] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 0x5963dc0] 264 - core 161 r3018 db0d417 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=34 lookahead_threads=5 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080, q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
    Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      encoder         : Lavc58.91.100 aac
frame=  726 fps= 69 q=-1.0 Lsize=    7114kB time=00:00:29.00 bitrate=2009.4kbits/s dup=1 drop=0 speed=2.76x    
video:6633kB audio:456kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.351093%
[libx264 @ 0x5963dc0] frame I:8     Avg QP:16.38  size: 96958
[libx264 @ 0x5963dc0] frame P:319   Avg QP:19.49  size: 14630
[libx264 @ 0x5963dc0] frame B:399   Avg QP:23.99  size:  3379
[libx264 @ 0x5963dc0] consecutive B-frames:  4.5% 63.6%  8.7% 23.1%
[libx264 @ 0x5963dc0] mb I  I16..4: 16.4% 61.0% 22.6%
[libx264 @ 0x5963dc0] mb P  I16..4:  3.5%  9.8%  0.7%  P16..4: 26.6%  4.9%  1.9%  0.0%  0.0%    skip:52.5%
[libx264 @ 0x5963dc0] mb B  I16..4:  0.3%  0.6%  0.2%  B16..8: 13.8%  0.9%  0.1%  direct: 0.9%  skip:83.1%  L0:44.1% L1:52.3% BI: 3.6%
[libx264 @ 0x5963dc0] 8x8 transform intra:67.2% inter:81.6%
[libx264 @ 0x5963dc0] coded y,uvDC,uvAC intra: 26.3% 38.2% 8.9% inter: 3.2% 5.8% 0.1%
[libx264 @ 0x5963dc0] i16 v,h,dc,p: 43% 25% 15% 17%
[libx264 @ 0x5963dc0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 34% 17% 37%  2%  2%  2%  2%  3%  2%
[libx264 @ 0x5963dc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 19% 14%  6%  7%  7%  6%  6%  5%
[libx264 @ 0x5963dc0] i8c dc,h,v,p: 60% 19% 18%  3%
[libx264 @ 0x5963dc0] Weighted P-Frames: Y:0.9% UV:0.9%
[libx264 @ 0x5963dc0] ref P L0: 69.4%  7.6% 17.5%  5.5%  0.0%
[libx264 @ 0x5963dc0] ref B L0: 85.1% 12.9%  2.1%
[libx264 @ 0x5963dc0] ref B L1: 99.0%  1.0%
[libx264 @ 0x5963dc0] kb/s:1870.80
[aac @ 0x58bb580] Qavg: 174.733


  


• Bash : Create copy of music files in different format and folder

  13 mai 2021, par Brett Sjoholm

  I'm trying to create a bash scipt to simply automate finding my flac files and creating an alac copy of them in a separate folder. Just so I have my little itunes folder. Want to automate because so many.

  


  So I find my flac folders within my Eminem folder....

  


  :~$ find /mnt/music/Eminem -type d -name *FLAC
    /mnt/music/Eminem/2009 Relapse FLAC
    /mnt/music/Eminem/1996 Infinite FLAC
    /mnt/music/Eminem/1999 The Slim Shady LP FLAC
    /mnt/music/Eminem/2000 Marshall Mathers LP FLAC


  


  Now instead of going into each folder and converting manually using something like

  


      ffmpeg -i track.flac -acodec alac track.m4a...


  


  How do I, within a bash script, take these multiple folders. Create an ALAC copy of the contents in /mnt/music/iTunes using FFMpeg ?

  


  New folder will be...

  


  /mnt/music/iTunes/Eminem/2009 Relapse ALAC/track.m4a


  


  All flac folders have FLAC at the end in the same folder structure.

  


  /mnt/music/Artist/Year Album FLAC


  


  I understand most of the locating, copying, converting, manually terminal command stuff but when it comes to putting it into a bash script. I don't understand how I take the output of each command and use it for another. The list of folder for example. Don't know how to automate doing all the steps for each.

  


  Kind of long winded but any help will be much appreciated. Even some videos you recommend for learning.