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• ffmpeg convert cdg/mp3 to mp4 but cdg track is always sped up by a second

  4 mai 2021, par Carver S

  I've tried this :

  



  "C:\Program Files\ffmpeg-4.2.1-win64-static\bin\ffmpeg" -i %1 -i %2 -b:v 1M -y -speed 2 "%~dpn1.mp4"

"C:\Program Files\ffmpeg-4.2.1-win64-static\bin\ffmpeg" -i %1 -i %2 -pix_fmt yuv420p -vcodec libx264 -async 1 -speed 2 "%~dpn1.mp4"


  



  Always same result. The file and quality are great, but obv since its karaoke... the lyrics need to match the timing and the converted files lyrics track is always about a full second or so ahead from when I play the original in a Karaoke program. Any ideas on what settings I could play with to help with this ?

  



  Both the original and the converted have the same play length at the end though. so the mp3 track seems to be ok.

  



  EDIT : Added cmd output

  



  "C:\Program Files\ffmpeg-4.2.1-win64-static\bin\ffmpeg" -i "A:\25 Karaoke\English\Linkin Park - In The End [SF Karaoke].cdg" -i "A:\25 Karaoke\English\Linkin Park - In The End [SF Karaoke].mp3" -b:v 1M -y -speed 2 "LP_inTheEnd.mp4"
ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.1.1 (GCC) 20190807
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, cdg, from 'A:\25 Karaoke\English\Linkin Park - In The End [SF Karaoke].cdg':
  Duration: 00:03:56.21, start: 0.480000, bitrate: 57 kb/s
    Stream #0:0: Video: cdgraphics, pal8, 300x216, 300 fps, 300 tbr, 300 tbn, 300 tbc
[mp3 @ 000001bb3c14bb40] Estimating duration from bitrate, this may be inaccurate
Input #1, mp3, from 'A:\25 Karaoke\English\Linkin Park - In The End [SF Karaoke].mp3':
  Metadata:
    title           : In The End [SF Karaoke]
    artist          : Linkin Park
    comment         : http://www.otslabs.com/
  Duration: 00:03:56.26, start: 0.000000, bitrate: 128 kb/s
    Stream #1:0: Audio: mp3, 44100 Hz, stereo, fltp, 128 kb/s
Codec AVOption speed () specified for output file #0 (LP_inTheEnd.mp4) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
Stream mapping:
  Stream #0:0 -> #0:0 (cdgraphics (native) -> h264 (libx264))
  Stream #1:0 -> #0:1 (mp3 (mp3float) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 000001bb3c13bc00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 000001bb3c13bc00] profile High 4:4:4 Predictive, level 3.1, 4:4:4, 8-bit
[libx264 @ 000001bb3c13bc00] 264 - core 158 r2984 3759fcb - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - 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=4 threads=7 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=abr mbtree=1 bitrate=1000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'LP_inTheEnd.mp4':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p(progressive), 300x216, q=-1--1, 1000 kb/s, 300 fps, 19200 tbn, 300 tbc
    Metadata:
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/1000000 buffer size: 0 vbv_delay: -1
    Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc58.54.100 aac
More than 1000 frames duplicated
More than 10000 frames duplicated   2048kB time=00:00:42.16 bitrate= 397.9kbits/s dup=9625 drop=0 speed=11.5x
frame=59170 fps=3226 q=-1.0 Lsize=   11887kB time=00:03:56.26 bitrate= 412.2kbits/s dup=43525 drop=0 speed=12.9x
video:7749kB audio:3340kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 7.203599%
[libx264 @ 000001bb3c13bc00] frame I:242   Avg QP: 0.26  size: 17214
[libx264 @ 000001bb3c13bc00] frame P:16651 Avg QP: 0.14  size:   164
[libx264 @ 000001bb3c13bc00] frame B:42277 Avg QP: 0.25  size:    25
[libx264 @ 000001bb3c13bc00] consecutive B-frames:  2.7%  4.9%  3.8% 88.6%
[libx264 @ 000001bb3c13bc00] mb I  I16..4: 73.7%  1.6% 24.7%
[libx264 @ 000001bb3c13bc00] mb P  I16..4:  0.1%  0.0%  0.1%  P16..4:  0.4%  0.0%  0.0%  0.0%  0.0%    skip:99.4%
[libx264 @ 000001bb3c13bc00] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.3%  0.0%  0.0%  direct: 0.0%  skip:99.7%  L0:44.2% L1:55.6% BI: 0.2%
[libx264 @ 000001bb3c13bc00] final ratefactor: -19.48
[libx264 @ 000001bb3c13bc00] 8x8 transform intra:1.5% inter:14.0%
[libx264 @ 000001bb3c13bc00] coded y,u,v intra: 14.1% 14.8% 14.9% inter: 0.0% 0.0% 0.0%
[libx264 @ 000001bb3c13bc00] i16 v,h,dc,p: 90%  0%  9%  0%
[libx264 @ 000001bb3c13bc00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 14% 63%  0%  0%  0%  0%  0%  1%
[libx264 @ 000001bb3c13bc00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 55% 15% 16%  1%  2%  3%  3%  2%  2%
[libx264 @ 000001bb3c13bc00] Weighted P-Frames: Y:0.2% UV:0.2%
[libx264 @ 000001bb3c13bc00] ref P L0: 97.9%  0.9%  1.0%  0.2%
[libx264 @ 000001bb3c13bc00] ref B L0: 99.6%  0.4%  0.0%
[libx264 @ 000001bb3c13bc00] ref B L1: 99.9%  0.1%
[libx264 @ 000001bb3c13bc00] kb/s:321.80
[aac @ 000001bb3c172e40] Qavg: 6813.878


  


• ffmpeg At least one output file must be specified error

  13 avril 2022, par insea

  How can i fix this ;( help me....
it works well if i tpye only "'ffmpeg -i ' + video_path + ' -q:v 2 -f image2 ' + frame_path + '\image_%6d.jpg'" on prompt with specific path name.
but it doesn't work in .py (i used code in .py-> os.system('ffmpeg -i ' + video_path + ' -q:v 2 -f image2 ' + frame_path + '\image_%6d.jpg')

  


  '''
ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 10.2.1 (GCC) 20200726
configuration : —disable-static —enable-shared —enable-gpl —enable-version3 —enable-sdl2 —enable-fontconfig —enable-gnutls —enable-iconv —enable-libass —enable-libdav1d —enable-libbluray —enable-libfreetype —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libopus —enable-libshine —enable-libsnappy —enable-libsoxr —enable-libsrt —enable-libtheora —enable-libtwolame —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxml2 —enable-libzimg —enable-lzma —enable-zlib —enable-gmp —enable-libvidstab —enable-libvmaf —enable-libvorbis —enable-libvo-amrwbenc —enable-libmysofa —enable-libspeex —enable-libxvid —enable-libaom —enable-libgsm —enable-librav1e —disable-w32threads —enable-libmfx —enable-ffnvcodec —enable-cuda-llvm —enable-cuvid —enable-d3d11va —enable-nvenc —enable-nvdec —enable-dxva2 —enable-avisynth —enable-libopenmpt —enable-amf
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
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002629ef05540] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'E :\dataset\Videos\Arrest\Arrest007_x264.mp4' :
Metadata :
major_brand : isom
minor_version : 512
compatible_brands : isomiso2avc1mp41
track : 0
artist :
album :
date : 0
genre :
lyrics :
title :
encoder : Lavf56.36.100
Duration : 00:01:44.84, start : 0.000000, bitrate : 1499 kb/s
Stream #0:0(und) : Video : h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 1387 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
Metadata :
handler_name : VideoHandler
Stream #0:1(eng) : Audio : aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 105 kb/s (default)
Metadata :
handler_name : SoundHandler
Stream #0:2 : Video : png, rgb24(pc), 58x38 [SAR 304:261 DAR 16:9], 90k tbr, 90k tbn, 90k tbc (attached pic)
At least one output file must be specified
'''

  


• ffmpeg does not compress video (produces empty file)

  1er septembre 2019, par kalmanIsAGameChanger

  I am trying to compress a video with ffmpeg.

  My operating system : Ubuntu 16.04

  My ffmpeg version (retrieved through ffmpeg -version) :

  ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609

  FYI, The information about the video can be retrieved with :

  ffprobe -show_streams -i "video.mp4"

  and I get :

  ffprobe version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2007-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
    configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  
    libavutil      54. 31.100 / 54. 31.100
  
    libavcodec     56. 60.100 / 56. 60.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 40.101 /  5. 40.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'a2019a_video_2.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 1
  
      compatible_brands: mp41mp42isom
  
      creation_time   : 2019-08-28 15:28:45
  
    Duration: 00:03:12.49, start: 0.000000, bitrate: 10884 kb/s
  
      Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 12 kb/s (default)
  
      Metadata:
  
        creation_time   : 2019-08-28 15:28:45
  
        handler_name    : Core Media Audio
  
      Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 10862 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 120k tbc (default)
  
      Metadata:
  
        creation_time   : 2019-08-28 15:28:45
  
        handler_name    : Core Media Video
  
  [STREAM]
  
  index=0
  
  codec_name=aac
  
  codec_long_name=AAC (Advanced Audio Coding)
  
  profile=LC
  
  codec_type=audio
  
  codec_time_base=1/48000
  
  codec_tag_string=mp4a
  
  codec_tag=0x6134706d
  
  sample_fmt=fltp
  
  sample_rate=48000
  
  channels=2
  
  channel_layout=stereo
  
  bits_per_sample=0
  
  id=N/A
  
  r_frame_rate=0/0
  
  avg_frame_rate=0/0
  
  time_base=1/48000
  
  start_pts=0
  
  start_time=0.000000
  
  duration_ts=9242624
  
  duration=192.554667
  
  bit_rate=12469
  
  max_bit_rate=128000
  
  bits_per_raw_sample=N/A
  
  nb_frames=9026
  
  nb_read_frames=N/A
  
  nb_read_packets=N/A
  
  DISPOSITION:default=1
  
  DISPOSITION:dub=0
  
  DISPOSITION:original=0
  
  DISPOSITION:comment=0
  
  DISPOSITION:lyrics=0
  
  DISPOSITION:karaoke=0
  
  DISPOSITION:forced=0
  
  DISPOSITION:hearing_impaired=0
  
  DISPOSITION:visual_impaired=0
  
  DISPOSITION:clean_effects=0
  
  DISPOSITION:attached_pic=0
  
  TAG:creation_time=2019-08-28 15:28:45
  
  TAG:language=eng
  
  TAG:handler_name=Core Media Audio
  
  [/STREAM]
  
  [STREAM]
  
  index=1
  
  codec_name=h264
  
  codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
  
  profile=High
  
  codec_type=video
  
  codec_time_base=1/120000
  
  codec_tag_string=avc1
  
  codec_tag=0x31637661
  
  width=1280
  
  height=720
  
  coded_width=1280
  
  coded_height=720
  
  has_b_frames=0
  
  sample_aspect_ratio=1:1
  
  display_aspect_ratio=16:9
  
  pix_fmt=yuv420p
  
  level=32
  
  color_range=tv
  
  color_space=bt709
  
  color_transfer=bt709
  
  color_primaries=bt709
  
  chroma_location=left
  
  timecode=N/A
  
  refs=2
  
  is_avc=1
  
  nal_length_size=4
  
  id=N/A
  
  r_frame_rate=60000/1001
  
  avg_frame_rate=60000/1001
  
  time_base=1/60000
  
  start_pts=0
  
  start_time=0.000000
  
  duration_ts=11549538
  
  duration=192.492300
  
  bit_rate=10862370
  
  max_bit_rate=N/A
  
  bits_per_raw_sample=8
  
  nb_frames=11538
  
  nb_read_frames=N/A
  
  nb_read_packets=N/A
  
  DISPOSITION:default=1
  
  DISPOSITION:dub=0
  
  DISPOSITION:original=0
  
  DISPOSITION:comment=0
  
  DISPOSITION:lyrics=0
  
  DISPOSITION:karaoke=0
  
  DISPOSITION:forced=0
  
  DISPOSITION:hearing_impaired=0
  
  DISPOSITION:visual_impaired=0
  
  DISPOSITION:clean_effects=0
  
  DISPOSITION:attached_pic=0
  
  TAG:creation_time=2019-08-28 15:28:45
  
  TAG:language=und
  
  TAG:handler_name=Core Media Video
  
  [/STREAM]

  However, when I try to compress it through the following command :

  ffmpeg -y -i video.mp4 -vcodec h264 -crf 10 output.mp4

  the process just finishes super fast without any error but I get an empty file called output.mp4 (its dimension is 0KB).

  EDIT : Actually there is something which appears in the console (Even if it is not an error). The following :
  The encoder 'aac' is experimental but experimental codecs are not enabled, add '-strict -2' if you want to use it.

  I also tried with the following commands (changing codec etc.)

  ffmpeg -i video.mp4 output.mp4

  ffmpeg -y -i video.mp4 -vcodec copy -crf 10 output.mp4

  ffmpeg -i video.mp4 -vcodec libx264 -crf 10 output.mp4

  ffmpeg -i video.mp4 -vcodec libx265 -crf 10 output.mp4

  But I have always the same problem.