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• Terminal : How to extract vobsub subtitles to bitmap images (jpg, png) ?

  5 août 2022, par DevonDahon

  How to extract image-based subtitles to bitmap images (jpg, png) ?

  


  I tried with ffmpeg, but it seems to work only with text-based subtitles.

  


  $ ffmpeg -i myvideo.mp4 -map "0:2" output.bre.srt
ffmpeg version 5.0.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with Apple clang version 13.1.6 (clang-1316.0.21.2.5)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/5.0.1_3 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  libavutil      57. 17.100 / 57. 17.100
  libavcodec     59. 18.100 / 59. 18.100
  libavformat    59. 16.100 / 59. 16.100
  libavdevice    59.  4.100 / 59.  4.100
  libavfilter     8. 24.100 /  8. 24.100
  libswscale      6.  4.100 /  6.  4.100
  libswresample   4.  3.100 /  4.  3.100
  libpostproc    56.  3.100 / 56.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'myvideo.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 512
    compatible_brands: mp42iso2avc1mp41
    creation_time   : 2022-08-03T21:58:07.000000Z
    encoder         : HandBrake 1.5.1 2022011000
  Duration: 00:11:05.40, start: 0.000000, bitrate: 1635 kb/s
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt470bg/bt470bg, progressive), 712x576 [SAR 16:15 DAR 178:135], 1454 kb/s, 25 fps, 25 tbr, 90k tbn (default)
    Metadata:
      creation_time   : 2022-08-03T21:58:07.000000Z
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](bre): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 162 kb/s (default)
    Metadata:
      creation_time   : 2022-08-03T21:58:07.000000Z
      handler_name    : Stereo
      vendor_id       : [0][0][0][0]
  Stream #0:2[0x3](bre): Subtitle: dvd_subtitle (mp4s / 0x7334706D), 720x576, 6 kb/s (default)
    Metadata:
      creation_time   : 2022-08-03T21:58:07.000000Z
      handler_name    : Brezhoneg
  Stream #0:3[0x4](fra): Subtitle: dvd_subtitle (mp4s / 0x7334706D), 720x576, 6 kb/s
    Metadata:
      creation_time   : 2022-08-03T21:58:07.000000Z
      handler_name    : Français
Error initializing output stream 0:0 -- Subtitle encoding currently only possible from text to text or bitmap to bitmap
Stream mapping:
  Stream #0:2 -> #0:0 (dvd_subtitle (dvdsub) -> subrip (srt))
    Last message repeated 1 times


  


• How to convert video formats of av3 to wmv/mpeg using FFMPEG

  5 août 2022, par Nandha

  I'm trying to convert a av3 format video into wmv format to allow it be playable in web browser. To do the conversion I'm using FFMPEG to create thumbnail & low res wmv file. But I'm getting the below errors. I have the AVHash for the video file as well.

  


  Video codec using MediaInfo

  


  

  


  FFMPEG version & libraries

  


  

  


  Followings are the different options I tried,

  


  1st command


  


  


  [root@dems-otmm Installer]# ffmpeg -i oja00039_20191218070243e0_20191218070113_01_000v.av3 -f framehash out.sha256
ffmpeg version 4.2.6 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 8 (GCC)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection' --extra-ldflags='-Wl,-z,relro -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld ' --extra-cflags=' ' --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 --enable-bzlib --disable-crystalhd --enable-fontconfig --enable-frei0r --enable-gcrypt --enable-gnutls --enable-ladspa --enable-libaom --enable-libdav1d --enable-libass --enable-libbluray --enable-libcdio --enable-libdrm --enable-libjack --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librsvg --enable-libsrt --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-version3 --enable-vapoursynth --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --enable-libzvbi --enable-avfilter --enable-avresample --enable-libmodplug --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-libmfx --enable-runtime-cpudetect
  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
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x564ccd01ef00] invalid STSD entries 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x564ccd01ef00] error reading header
oja00039_20191218070243e0_20191218070113_01_000v.av3: Invalid data found when processing input

  


  


  



  2nd command

  


  


  


  [root@dems-otmm Installer]# ffmpeg -loglevel warning -y -i oja00039_20191218070243e0_20191218070113_01_000v.av3 -r 1/10 -vf scale='min(500,iw)':-2 -f image2 oja00039_20191218070243e0_20191218070113_01_000v%4d.jpg -vf scale='min(640,iw)':-2 -r 29.97 -b:v 800000 -b:a 96000 -ar 48000 oja00039_20191218070243e0_20191218070113_01_000v.wmv
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5631fc2bd140] invalid STSD entries 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5631fc2bd140] error reading header
oja00039_20191218070243e0_20191218070113_01_000v.av3: Invalid data found when processing input
[root@dems-otmm Installer]#

  


  


  



  And few others, but with everything I'm getting the same errors attached below,

  


  


  


  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x5631fc2bd140] invalid STSD entries 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5631fc2bd140] error reading header
oja00039_20191218070243e0_20191218070113_01_000v.av3: Invalid data found when processing input

  


  


  



• FFMpeg Unknown function in zoompan filter

  4 août 2022, par Luciano Salemme

  i'm using ffmpeg with zoompan filter in my local environment whit the following command and it works well :

  


  ffmpeg -y -i "https://my.domain/workspaces/1/a_render_dir/video_spotx.mp4" -i "https://my.domain/workspaces/1/Gallery/travel_6.jpeg" -i "https://my.domain/workspaces/1/Gallery/travel_6.jpeg" -i "https://my.domain/workspaces/1/Gallery/travel_6.jpeg" -i "/usr/app/src/output/video.mp4/text_0.png" -i "/usr/app/src/output/video.mp4/text_1.png"    -filter_complex "[0]drawbox=x=0:y=0:w=iw:h=ih:color=00FF00@1:t=fill[padded];[0]format=yuva420p,pad=iw*2:ih*2:color=black@0,zoompan=z='if(lt(it,0),2,if(lte(pzoom,1.0),2,max(1.56,pzoom-0.005789473684210526)))':x=0:y=0:d=1:s=950x540[zp],[padded][zp]overlay=x='if(lt(t,3.04),t*213/3.04,213)':y='if(lt(t,3.04),t*50/3.04,50)':eval=frame[zp_stream],[1:v]scale=237.5:-1 [image1],[2:v]scale=237.5:-1 [image2],[3:v]scale=237.5:-1 [image3],[4:v]scale=475:-1 [image4],[5:v]scale=237.5:-1 [image5],[zp_stream][image1] overlay=95:54:enable='between(t,3,8)' [overlay1],[overlay1][image2] overlay=380:216:enable='between(t,3,8)' [overlay2],[overlay2][image3] overlay=532:54:enable='between(t,5,10)' [overlay3],[overlay3][image4] overlay=475:270:enable='between(t,1,8)' [overlay4],[overlay4][image5] overlay=0:0:enable='between(t,1,8)' [overlay5]" -map "[overlay5]" -pix_fmt yuv420p -map 0:a -c:a copy "/usr/app/src/output/video.mp4/render_video.mp4"


  


  However when i build a docker container and run that command it is not working. The output error is the following :

  


  [Parsed_zoompan_3 @ 0x2a08ac0c5140] [Eval @ 0x3ec4ec4c9ad0] Unknown function in 'it,0),2,if(lte(pzoom,1.0),2,max(1.56,pzoom-0.005789473684210526)))'


  


  I tried to add a fixed z value to the zoompan filter, and the command works also inside the container, so the issue is on the zoompan syntax.

  


  Here is my docker file

  


  FROM node:16

ENV NODE_ENV=production

RUN apt-get -y update && \
    apt-get install -y  ffmpeg \
    build-essential libcairo2-dev libpango1.0-dev libjpeg-dev libgif-dev librsvg2-dev 

WORKDIR /usr/src/app
COPY . .
RUN npm ci --production --silent

CMD node src/index.js


  


  Problem starts when i switch on new Macbook pro with M1 processor, but i'm not sure it's related, i build the image with the following command :

  


  docker buildx build --platform linux/x86_64  -t render-job .


  


  On my macchine there is ffmpeg 5.0.1 installed, but on docker container the command apt-get install -y     ffmpeg installs just the follow wersion :

  


  ffmpeg version 4.1.9-0+deb10u1 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)


  


  I don't think is relate to the version, because before to build with M1 processor the zoompan filter was working also in the container.

  


  Any help is appreciated.
Thanks.