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• Converting vob to mp4 with ffmpeg

  10 janvier 2016, par ᴜsᴇʀ

  I’m trying to convert a vob file into an mp4 file (H.264 and AAC), but I have a strange problem.

  The following are some information about the input file :

  ffmpeg -i input.vob 
  
  ffmpeg version N-77455-g4707497 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libfreetype --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
  
    libavutil      55. 11.100 / 55. 11.100
  
    libavcodec     57. 20.100 / 57. 20.100
  
    libavformat    57. 20.100 / 57. 20.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6. 21.101 /  6. 21.101
  
    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
  
  Input #0, mpeg, from '2003-05-24_01.vob':
  
    Duration: 01:01:34.08, start: 0.335967, bitrate: 6544 kb/s
  
      Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg), 720x576 [SAR 64:45 DAR 16:9], max. 9800 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0:1[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s

  For the conversion I use the following command :

  ffmpeg -i input.vob -c:v libx264 -preset slow -crf 19 -c:a aac -b:a 256k -threads 0 output.mp4

  Some information about the output file :

  ffmpeg -i output.mp4 
  
  ffmpeg version N-77455-g4707497 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libfreetype --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
  
    libavutil      55. 11.100 / 55. 11.100
  
    libavcodec     57. 20.100 / 57. 20.100
  
    libavformat    57. 20.100 / 57. 20.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6. 21.101 /  6. 21.101
  
    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
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'OUT.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.20.100
  
    Duration: 01:01:34.08, start: 0.335967, bitrate: 7183 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x576 [SAR 64:45 DAR 16:9], 6916 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 260 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler

  After the conversion, I open the new file output.mp4 with VLC : but there is a problem with the audio ! If I skip forward the video, the sound disappears or (sometimes) it is distorted. The only way to have the right sound is to disable the audio stream in VLC, and then re-enable it.

  I have found a solution for this problem :

  ffmpeg -i input.vob -c:v libx264 -preset veryfast -crf 19 -c:a aac -b:a 256k -threads 0 output.mp4

  But obviously this isn’t a real solution, because what I obtain is not what I want.

• ffmpeg converting mp4 to gif with color palette results in truncated video

  6 décembre 2019, par Tik0

  I want to generate a gif from my mp4 movie with ffmpeg (ffmpeg version 2.8.15-0ubuntu0.16.04.1) using a color palette. Everything works fine if I do not use a palette :

  $ ffmpeg -i in.mp4 -filter_complex "scale=160:-1" out.gif
  
  ...
  
  frame= 2003 fps=251 q=-0.0 Lsize=   21172kB time=00:01:20.12 bitrate=2164.7kbits/s    
  
  video:21155kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.077667%

  But using a palette like so results in Buffer queue overflow, dropping messages and a truncated video

  $ ffmpeg -i in.mp4 -filter_complex "[0:v] scale=160:-1, split [a][b];[a] palettegen [p];[b][p] paletteuse" out.gif
  
  ....
  
  [Parsed_paletteuse_3 @ 0xc56de0] [framesync @ 0xd1af08] Buffer queue overflow, dropping.
  
  Last message repeated 36 times
  
  [Parsed_paletteuse_3 @ 0xc56de0] [framesync @ 0xd1af08] Buffer queue overflow, dropping.
  
  Last message repeated 106 times
  
  ...
  
  [Parsed_palettegen_2 @ 0xc56d40] 255(+1) colors generated out of 1347441 colors; ratio=0.000189
  
  frame=   65 fps=5.4 q=-0.0 Lsize=    1036kB time=00:01:20.12 bitrate= 105.9kbits/s    
  
  video:1035kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.124664%

• FFMpeg Watermark Quality Very Bad

  22 janvier 2016, par John Cliven

  I’m trying to add a watermark to a video which works fine, the only issue is the quality is greatly degraded. It also reduces the resolution of the video, making it a smaller size than it originally was. I am using the following command :

  ffmpeg -i fade.mp4 -i watermark.png -filter_complex "scale=512:-2,overlay=(main_w-overlay_w)-2:(main_h-overlay_h)-2" -strict -2 final.mp4

  I have also tried the following to specify high quality, but it produces the same bad quality video :

  ffmpeg -i fade.mp4 -i watermark.png -filter_complex "scale=512:-2,overlay=(main_w-overlay_w)-2:(main_h-overlay_h)-2" -qscale 0 -strict -2 final.mp4

  Here is the output from ffmpeg :

  root@shell:~/videos# ffmpeg -i fade.mp4 -i watermark.png -filter_complex "scale=512:-2,overlay=(main_w-overlay_w)-2:(main_h-overlay_h)-2" -strict -2 final.mp4
  
  ffmpeg version 2.7.4-0ubuntu0.15.10.1 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 5.2.1 (Ubuntu 5.2.1-22ubuntu2) 20151010
  
    configuration: --prefix=/usr --extra-version=0ubuntu0.15.10.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-frei0r --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-openal --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libxvid --enable-libzvbi --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-libssh --enable-libsoxr --enable-libx264 --enable-libopencv --enable-libx265
  
    libavutil      54. 27.100 / 54. 27.100
  
    libavcodec     56. 41.100 / 56. 41.100
  
    libavformat    56. 36.100 / 56. 36.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 16.101 /  5. 16.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.100 /  1.  2.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'fade.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.36.100
  
    Duration: 00:00:29.13, start: 0.023220, bitrate: 1158 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1027 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Input #1, png_pipe, from 'watermark.png':
  
    Duration: N/A, bitrate: N/A
  
      Stream #1:0: Video: png, rgba(pc), 200x45 [SAR 11811:11811 DAR 40:9], 25 tbr, 25 tbn, 25 tbc
  
  [libx264 @ 0x24743c0] using SAR=1/1
  
  [libx264 @ 0x24743c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x24743c0] profile High, level 2.1
  
  [libx264 @ 0x24743c0] 264 - core 146 r2555 0c21480 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - videolan[cannotpostlink]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=9 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 'final.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.36.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 512x288 [SAR 1:1 DAR 16:9], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
  
      Metadata:
  
        encoder         : Lavc56.41.100 libx264
  
      Stream #0:1(eng): Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
        encoder         : Lavc56.41.100 aac
  
  Stream mapping:
  
    Stream #0:0 (h264) -> scale (graph 0)
  
    Stream #1:0 (png) -> overlay:overlay (graph 0)
  
    overlay (graph 0) -> Stream #0:0 (libx264)
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  frame=  874 fps= 86 q=-1.0 Lsize=    1308kB time=00:00:29.09 bitrate= 368.2kbits/s dup=1 drop=0
  
  video:837kB audio:440kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.454302%
  
  [libx264 @ 0x24743c0] frame I:5     Avg QP:21.11  size: 10348
  
  [libx264 @ 0x24743c0] frame P:363   Avg QP:22.00  size:  1698
  
  [libx264 @ 0x24743c0] frame B:506   Avg QP:23.35  size:   371
  
  [libx264 @ 0x24743c0] consecutive B-frames: 17.0%  7.1% 30.5% 45.3%
  
  [libx264 @ 0x24743c0] mb I  I16..4: 21.1% 41.7% 37.2%
  
  [libx264 @ 0x24743c0] mb P  I16..4:  2.6%  3.3%  1.2%  P16..4: 26.6% 12.0%  5.2%  0.0%  0.0%    skip:49.1%
  
  [libx264 @ 0x24743c0] mb B  I16..4:  0.3%  0.1%  0.0%  B16..8: 32.2%  2.8%  0.3%  direct: 0.2%  skip:64.1%  L0:38.5% L1:57.9% BI: 3.6%
  
  [libx264 @ 0x24743c0] 8x8 transform intra:44.2% inter:71.4%
  
  [libx264 @ 0x24743c0] coded y,uvDC,uvAC intra: 41.7% 32.3% 8.2% inter: 6.6% 3.5% 0.1%
  
  [libx264 @ 0x24743c0] i16 v,h,dc,p: 50% 32%  6% 12%
  
  [libx264 @ 0x24743c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 21% 24%  4%  5%  7%  5%  5%  6%
  
  [libx264 @ 0x24743c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 30% 12%  4%  6%  7%  6%  5%  5%
  
  [libx264 @ 0x24743c0] i8c dc,h,v,p: 67% 19% 12%  2%
  
  [libx264 @ 0x24743c0] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x24743c0] ref P L0: 65.7% 18.3% 11.2%  4.8%
  
  [libx264 @ 0x24743c0] ref B L0: 84.6% 11.7%  3.7%
  
  [libx264 @ 0x24743c0] ref B L1: 95.2%  4.8%
  
  [libx264 @ 0x24743c0] kb/s:234.81
  
  root@shell:~/videos#