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• ffmpeg concat last image duration incorrect

  27 novembre 2019, par SIDU

  Here is my png.txt file :

  file '01.png'
  
  duration 92
  
  file '02.png'
  
  duration 46
  
  file '03.png'
  
  duration 67
  
  file '04.png'
  
  duration 62
  
  file '05.png'
  
  duration 57
  
  file '06.png'
  
  duration 3
  
  file '06.png'

  mp3 duration = 00:05:28 (total of above)

  And here is the line :

  ffmpeg -f concat -i png.txt -vsync vfr -i 20170817.mp3 -c:a aac -s 1280x720 -c:v libx264 -pix_fmt yuv420p -shortest 20170817.mp4

  And here is the output :

  ffmpeg version 3.3.2 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 8.1.0 (clang-802.0.42)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-vda
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libavresample   3.  5.  0 /  3.  5.  0
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  Input #0, concat, from 'png.txt':
  
    Duration: 00:05:27.00, start: 0.000000, bitrate: 0 kb/s
  
      Stream #0:0: Video: png, rgba(pc), 1280x720 [SAR 2835:2835 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
  
  Input #1, mp3, from '20170817.mp3':
  
    Metadata:
  
      encoder         : Lavf57.71.100
  
    Duration: 00:05:28.10, start: 0.069063, bitrate: 24 kb/s
  
      Stream #1:0: Audio: mp3, 16000 Hz, mono, s16p, 24 kb/s
  
  File '20170817.mp4' already exists. Overwrite ? [y/N] y
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (mp3 (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x7fbe83003000] using SAR=1/1
  
  [libx264 @ 0x7fbe83003000] using cpu capabilities: MMX2 SSE2Fast SSSE3     SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x7fbe83003000] profile High, level 3.1
  
  [libx264 @ 0x7fbe83003000] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4    AVC codec - Copyleft 2003-2016 - 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=6 lookahead_threads=1 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 '20170817.mp4':
  
    Metadata:
  
      encoder         : Lavf57.71.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc57.89.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 16000 Hz, mono, fltp, 69 kb/s
  
      Metadata:
  
        encoder         : Lavc57.89.100 aac
  
  frame=    7 fps=4.2 q=-1.0 Lsize=    3349kB time=00:05:27.04 bitrate=  83.9kbits/s speed= 196x    
  
  video:465kB audio:2863kB subtitle:0kB other streams:0kB global    headers:0kB muxing overhead: 0.644585%
  
  [libx264 @ 0x7fbe83003000] frame I:1     Avg QP: 7.93  size:159157
  
  [libx264 @ 0x7fbe83003000] frame P:2     Avg QP:17.16  size: 61998
  
  [libx264 @ 0x7fbe83003000] frame B:4     Avg QP:18.34  size: 48049
  
  [libx264 @ 0x7fbe83003000] consecutive B-frames: 14.3% 28.6%  0.0% 57.1%
  
  [libx264 @ 0x7fbe83003000] mb I  I16..4: 48.6% 21.6% 29.8%
  
  [libx264 @ 0x7fbe83003000] mb P  I16..4:  4.4%  9.8% 19.7%  P16..4: 11.6%  3.0%  2.6%  0.0%  0.0%    skip:48.9%
  
  [libx264 @ 0x7fbe83003000] mb B  I16..4:  0.4%  0.5% 13.2%  B16..8: 14.9%  3.9%  2.6%  direct: 1.1%  skip:63.4%  L0:45.0% L1:52.1% BI: 3.0%
  
  [libx264 @ 0x7fbe83003000] 8x8 transform intra:19.2% inter:38.3%
  
  [libx264 @ 0x7fbe83003000] coded y,uvDC,uvAC intra: 52.3% 63.3% 62.4% inter: 8.6% 7.7% 6.9%
  
  [libx264 @ 0x7fbe83003000] i16 v,h,dc,p: 88%  9%  3%  0%
  
  [libx264 @ 0x7fbe83003000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 12% 45%  2%  2%  3%  2%  3%  4%
  
  [libx264 @ 0x7fbe83003000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 26% 18%  5%  5%  5%  5%  6%  6%
  
  [libx264 @ 0x7fbe83003000] i8c dc,h,v,p: 55% 18% 20%  8%
  
  [libx264 @ 0x7fbe83003000] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x7fbe83003000] ref P L0: 93.3%  0.3%  3.7%  2.8%
  
  [libx264 @ 0x7fbe83003000] ref B L0: 85.2% 14.8%
  
  [libx264 @ 0x7fbe83003000] ref B L1: 87.8% 12.2%
  
  [libx264 @ 0x7fbe83003000] kb/s:11.52
  
  [aac @ 0x7fbe83004800] Qavg: 1971.172

  The problem is that the mp4 has 00:06:45 duration, and the music finished at 00:05:28

  How do I chop the last silent bit off ?

  I tried the following :

  ffmpeg -ss 0 -i 20170817.mp4 -to 00:05:28 -c copy cut.mp4

  Which is worse. Adds blank silent video at front, and chop the video at middle which yet to finish.

  Please note the first 5 images are correct at right music positions, only last image duration error

• How to encode specific metadata version in FFMPEG ?

  11 février 2021, par Charlie Britton

  I am batch converting lots of songs into shorter "Advert" songs for SHOUTcast and to be recognised as adverts by the server. The song must have ":Advert" for both the title and the artist metadata tags. When I use the following command :

  



  ffmpeg -i "$i" -c copy -vn -map_metadata -1 -metadata title=":Advert" -metadata artist=":Advert" -t 120 "adverts/ADVERT_$i"


  



  I would expect it to output the song with only ":Advert" as title and artist metadata but when I import it into the radio playout software (using ID3 1.x tagging) the metadata has not copied across and is therefore lost. Output from ffmpeg :

  



  ffmpeg version 3.0.2 Copyright (c) 2000-2016 the FFmpeg developers
  built with Apple LLVM version 9.0.0 (clang-900.0.37)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.0.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid --disable-lzma --enable-vda
  libavutil      55. 17.103 / 55. 17.103
  libavcodec     57. 24.102 / 57. 24.102
  libavformat    57. 25.100 / 57. 25.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 31.100 /  6. 31.100
  libavresample   3.  0.  0 /  3.  0.  0
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
[mp3 @ 0x7feba6800000] Skipping 0 bytes of junk at 230934.
[mjpeg @ 0x7feba7000600] Changing bps to 8
Input #0, mp3, from 'Joakim Karud - Vibe With Me.mp3':
  Metadata:
    major_brand     : dash
    minor_version   : 0
    compatible_brands: iso6mp41
    encoder         : Lavf56.40.101
    artist          : Joakim Karud
    title           : Vibe With Me
  Duration: 00:02:53.06, start: 0.025056, bitrate: 138 kb/s
    Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
    Metadata:
      encoder         : Lavc56.60
    Stream #0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 1:1 DAR 16:9], 90k tbr, 90k tbn, 90k tbc
    Metadata:
      comment         : Cover (front)
Output #0, mp3, to 'adverts/ADVERT_Joakim Karud - Vibe With Me.mp3':
  Metadata:
    TIT2            : :Advert
    TPE1            : :Advert
    TSSE            : Lavf57.25.100
    Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
size=    1876kB time=00:02:00.00 bitrate= 128.1kbits/s speed=1.44e+03x
video:0kB audio:1876kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.024837%


  



  I believe this is happening because the tag names are different (e.g. title should be title, but is TIT2 when output. Please could someone specify how I could ensure that the metadata is encoded in the ID3 1.x format so that it is readable by the radio playout software. Many thanks.

  


• How to stream M4A files correctly ?

  3 novembre 2017, par NineCattoRules

  I would like to stream an M4A audio file but for some reason the player starts to play the song only after downloaded the entire file.

  <audio controls="controls">
  
    <source src="https://php-test-easybreazy.c9users.io/music/1021785690_1171244514_239291028.m4a" type="audio/mpeg">
  
  Your browser does not support the audio element.
  
  </source></audio>

  In my Ubuntu server I used FFMPEG to encode my audio file.

  The only thing I can think of is a metadata/encode issue.

  Why the player starts playing only after downloaded the entire file audio ?