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• ffmpeg how to vertically rotate and concat/stack two videos in one command ?

  3 juin 2022, par baziorek

  I have two recordings inside.MOV and outside.MOV recorded with two cameras (the same settings and the same model).

  


  ---

  


  I want to do something like that :

  


  ffmpeg -i inside.MOV -vf "transpose=2,transpose=2" inside_rotated180degree.MOV # rotate 180 degree
ffmpeg -i outside.MOV -i inside_rotated180degree.MOV \
  -filter_complex "[0:v]scale=640:-1[v0];[v0][1:v]vstack=inputs=2" inside_and_outside.MOV # concat them


  


  but in single command.

  


  I've managed to rotate upper video, but I need to rotate lower :

  


  ffmpeg -i outside.MOV -i inside_rotated180degree.MOV \
  -filter_complex "[0:v]scale=1920:-1,rotate=PI[v0];[v0][1:v]vstack=inputs=2" inside_and_outside.MOV


  


  ---

  


  I tried to modify the command various ways to add rotate=PI, but always there is a error in command/screen/input/... does anybody knows how to rotate video lower instead of upper ?

  


• ffmpeg does not copy custom metadata

  20 juin 2015, par e110c0

  I’m trying to fix some videos made with an iDevice. The videos have a rotation in the metadata which is only understood by Apple and its software but noone else. Fixing this is quite simple, but I also would like to keep the other metadata in the files like the geolocation.

  I tried a couple of versions, all with the same result, e.g. :

  ffmpeg -i input.mov -vf vflip,hflip -map_metadata 0 -metadata:s:v:0 rotate=0  -acodec copy output.mp4

  This should work, it already gives the correct preview of metadata :

  ffmpeg version 1.1.2 Copyright (c) 2000-2013 the FFmpeg developers
  
  built on Feb  8 2013 23:55:22 with Apple clang version 4.0 (tags/Apple/clang-421.0.60) (based on LLVM 3.1svn)
  
  configuration: --prefix=/usr/local/Cellar/ffmpeg/1.1.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
  
  libavutil      52. 13.100 / 52. 13.100
  
  libavcodec     54. 86.100 / 54. 86.100
  
  libavformat    54. 59.106 / 54. 59.106
  
  libavdevice    54.  3.102 / 54.  3.102
  
  libavfilter     3. 32.100 /  3. 32.100
  
  libswscale      2.  1.103 /  2.  1.103
  
  libswresample   0. 17.102 /  0. 17.102
  
  libpostproc    52.  2.100 / 52.  2.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2013-02-17 00.39.36.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      creation_time   : 2013-02-16 23:39:25
  
      model           : iPhone 5
  
      model-deu       : iPhone 5
  
      encoder         : 6.1
  
      encoder-deu     : 6.1
  
      date            : 2013-02-17T00:39:25+0100
  
      date-deu        : 2013-02-17T00:39:25+0100
  
      location        : +48.2683+007.7205+172.710/
  
      location-deu    : +48.2683+007.7205+172.710/
  
      make            : Apple
  
      make-deu        : Apple
  
    Duration: 00:00:09.67, start: 0.000000, bitrate: 16764 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 16696 kb/s, 24 fps, 24 tbr, 600 tbn, 1200 tbc
  
      Metadata:
  
        rotate          : 180
  
        creation_time   : 2013-02-16 23:39:25
  
        handler_name    : Core Media Data Handler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 61 kb/s
  
      Metadata:
  
        creation_time   : 2013-02-16 23:39:25
  
        handler_name    : Core Media Data Handler
  
  w:1920 h:1080 pixfmt:yuv420p tb:1/600 fr:24/1 sar:0/1 sws_param:flags=2
  
  [libx264 @ 0x7fc248829a00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  
  [libx264 @ 0x7fc248829a00] profile High, level 4.0
  
  [libx264 @ 0x7fc248829a00] 264 - core 125 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=24 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     : qt  
  
    minor_version   : 0
  
    compatible_brands: qt  
  
    creation_time   : 2013-02-16 23:39:25
  
    model           : iPhone 5
  
    model-deu       : iPhone 5
  
    encoder-deu     : 6.1
  
    date            : 2013-02-17T00:39:25+0100
  
    date-deu        : 2013-02-17T00:39:25+0100
  
    location        : +48.2683+007.7205+172.710/
  
    location-deu    : +48.2683+007.7205+172.710/
  
    make            : Apple
  
    make-deu        : Apple
  
    encoder         : Lavf54.59.106
  
  Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1920x1080, q=-1--1, 12288 tbn, 24 tbc
  
  Metadata:
  
    handler_name    : Core Media Data Handler
  
    creation_time   : 2013-02-16 23:39:25
  
    rotate          : 0
  
  Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, mono, 61 kb/s
  
  Metadata:
  
    creation_time   : 2013-02-16 23:39:25
  
    handler_name    : Core Media Data Handler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (copy)

  But the resulting file keeps only some of these metadata tags :

  ffmpeg -i output.mp4

  shows :

  fmpeg version 1.1.2 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Feb  8 2013 23:55:22 with Apple clang version 4.0 (tags/Apple/clang-421.0.60) (based on LLVM 3.1svn)
  
  configuration: --prefix=/usr/local/Cellar/ffmpeg/1.1.2 --enable-shared --enable-pthreads -  -enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
  
  libavutil      52. 13.100 / 52. 13.100
  
  libavcodec     54. 86.100 / 54. 86.100
  
  libavformat    54. 59.106 / 54. 59.106
  
  libavdevice    54.  3.102 / 54.  3.102
  
  libavfilter     3. 32.100 /  3. 32.100
  
  libswscale      2.  1.103 /  2.  1.103
  
  libswresample   0. 17.102 /  0. 17.102
  
  libpostproc    52.  2.100 / 52.  2.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
  
  Metadata:
  
    major_brand     : isom
  
    minor_version   : 512
  
    compatible_brands: isomiso2mp41
  
    creation_time   : 2013-02-16 23:39:25
  
    date            : 2013-02-17T00:39:25+0100
  
    encoder         : Lavf54.59.106
  
  Duration: 00:00:09.67, start: 0.000000, bitrate: 3286 kb/s
  
    Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 3219 kb/s, 24 fps, 24 tbr, 12288 tbn, 24 tbc
  
    Metadata:
  
      creation_time   : 2013-02-16 23:39:25
  
      handler_name    : VideoHandler
  
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 61 kb/s
  
    Metadata:
  
      creation_time   : 2013-02-16 23:39:25
  
      handler_name    : SoundHandler

  I also tried to add the one tag I’m interested in by hand with

  -metadata:g location=+48.2683+007.7205+172.710/

  with no change in the result.

  Output as .mov doesn’t change anything, neither.

  Is there any trick to add non-standard metadata ? How do I get the location back in there ?

  Thanks in advance to anyone who can give some insight on this.

• handling subprocess file output

  14 janvier 2019, par Sandip Kumar

  I am working on a project in which at some point user uploads a video and in backend i have to generate thumbnail for that video. I preferred ffmpeg for this purpose and the system is in django environment.
  This is my view function

  def upload(request):
  
      if request.method == 'POST':
  
          form = DocumentForm(request.POST, request.FILES)
  
          if form.is_valid():
  
              newdoc = Document(docfile=request.FILES['docfile'])
  
              filename = str(request.FILES['docfile'].name)
  
              newdoc.save()
  
              op = subprocess.call(['ffmpeg', '-i',"media/private/"+up, '-ss', '00:00:03.000', '-vframes', '1', 'abc.jpg']) // Generates thumbnail
  
              newdoc.thumbnail = op
  
              newdoc.save()
  
              return HttpResponseRedirect(reverse('list'))
  
      else:
  
          form = DocumentForm()

  The Document has the thumbnail field. I know that subprocess.call() returns returncode not any object so using op variable is useless. So my query is how do i save generated thumbnail in model.