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• How to concatenate two or more videos with same width and different height in FFMpeg and to maintain the same aspect ratio ?

  25 octobre 2019, par Aarwil

  I have five video parts to concat all. Each five videos are in the same width and height. The second part is the hstack of another 2 videos and the third part is the hstack and vstack of another 3 videos. While concat all the five video parts the aspect ratio is not maintaining in the final video. Since I am new to ffmpeg help me to sort out the problem

  I have tried with the command in my final with filter complex and to reduce the size I used frame per second.

  "ffmpeg -i
final.mp4 -vf scale=1280:480 -filter:v fps=fps=30 finalNew.mp4"

  but nothing worked.
  Also help me to use hstack with scaling, to maintain the aspect ratio for the second part on below command

  Command : ffmpeg -i vid1.mkv -i vid2.mkv -filter_complex "[0:v]scale=-1:480[v0] ;[0:v][1:v]hstack=inputs=2"vid3.mkv

  Images

  second part

  third part

  videochunks

  I have console the info of my video

  ffmpeg -i part1.mkv -i part2.mkv -i part3.mkv -i part4.mkv -i part5.mkv
ffmpeg version N-94911-g197985c5bf 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-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
 libavutil      56. 35.100 / 56. 35.100
 libavcodec     58. 56.101 / 58. 56.101
 libavformat    58. 32.104 / 58. 32.104
 libavdevice    58.  9.100 / 58.  9.100
 libavfilter     7. 58.102 /  7. 58.102
 libswscale      5.  6.100 /  5.  6.100
 libswresample   3.  6.100 /  3.  6.100
 libpostproc    55.  6.100 / 55.  6.100
Input #0, matroska,webm, from 'part1.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:00:44.00, start: 0.000000, bitrate: 189 kb/s
   Stream #0:0(eng): Video: h264 (High), yuv420p(progressive), 640x480 [SAR 9:16 DAR 3:4], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     title           : Video
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:00:44.000000000
Input #1, matroska,webm, from 'part2.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:01:22.07, start: 0.000000, bitrate: 113 kb/s
   Stream #1:0: Video: h264 (High), yuv420p(progressive), 640x240 [SAR 9:16 DAR 3:2], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:01:22.066000000
Input #2, matroska,webm, from 'part3.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:00:42.03, start: 0.000000, bitrate: 405 kb/s
   Stream #2:0: Video: h264 (High), yuv420p(progressive), 640x720 [SAR 9:16 DAR 1:2], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:00:42.033000000
Input #3, matroska,webm, from 'part4.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:00:21.00, start: 0.000000, bitrate: 298 kb/s
   Stream #3:0: Video: h264 (High), yuv420p(progressive), 640x240 [SAR 9:16 DAR 3:2], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:00:21.000000000
Input #4, matroska,webm, from 'part5.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:00:16.00, start: 0.000000, bitrate: 169 kb/s
   Stream #4:0(eng): Video: h264 (High), yuv420p(progressive), 640x480 [SAR 9:16 DAR 3:4], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     title           : Video
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:00:16.000000000

• Flashblock improvement : Use width/height : auto on SWF instead of 100%, latter does not fall within ClickToFlash’s 8x8px "invisible flash" (and if allowed, OK to load) rules. Better chance of load success with this approach.

  3 juillet 2011

  m script/soundmanager2-jsmin.js m script/soundmanager2-nodebug-jsmin.js m script/soundmanager2-nodebug.js m script/soundmanager2.js Flashblock improvement : Use width/height : auto on SWF instead of 100%, latter does not fall within ClickToFlash’s 8x8px "invisible flash" (and if allowed, OK to (...)

• Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  6 juillet 2016, par olega

  Found a lot of helpful answers. But could not find for my problem.
  I am trying to convert .mp4 to .webm. I tried with parameters, without them (like below), but always got same result :

  ================

  ---

  Converting (dseoFRQrJehleLDHPdcB.mp4) started - Tue - Jul 05, 2016 @ 06:29 PM

  ---

  /usr/local/bin/ffmpeg -i public_html/uploads/avi/dseoFRQrJehleLDHPdcB.mp4 public_html/uploads/dseoFRQrJehleLDHPdcB.webm

  ffmpeg version N-80913-gd915b6e Copyright (c) 2000-2016 the FFmpeg developers

  built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16)

  configuration : —enable-libvpx —enable-libvorbis

  libavutil 55. 28.100 / 55. 28.100

  libavcodec 57. 48.101 / 57. 48.101

  libavformat 57. 41.100 / 57. 41.100

  libavdevice 57. 0.102 / 57. 0.102

  libavfilter 6. 47.100 / 6. 47.100

  libswscale 4. 1.100 / 4. 1.100

  libswresample 2. 1.100 / 2. 1.100

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
  ’/home/supergirl/public_html/uploads/avi/dseoFRQrJehleLDHPdcB.mp4’ :

  Metadata :

  major_brand     : isom
  
  
  
  minor_version   : 512
  
  
  
  compatible_brands: isomiso2avc1mp41
  
  
  
  creation_time   : 1970-01-01 00:00:00
  
  
  
  encoder         : Lavf53.24.2

  Duration : 00:00:05.31, start : 0.000000, bitrate : 1589 kb/s

  Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1205 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
  
  
  Metadata:
  
  
  
    creation_time   : 1970-01-01 00:00:00
  
  
  
    handler_name    : VideoHandler
  
  
  
  Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 384 kb/s (default)
  
  
  
  Metadata:
  
  
  
    creation_time   : 1970-01-01 00:00:00
  
  
  
    handler_name    : SoundHandler

  [libvpx @ 0x21fd880] v1.2.0

  [libvpx @ 0x21fd880] Failed to initialize encoder : ABI version mismatch

  Output #0, webm, to ’/home/supergirl/public_html/uploads/dseoFRQrJehleLDHPdcB.webm’ :

  Metadata :

  major_brand     : isom
  
  
  
  minor_version   : 512
  
  
  
  compatible_brands: isomiso2avc1mp41
  
  
  
  encoder         : Lavf53.24.2
  
  
  
  Stream #0:0(und): Unknown: none, SAR 1:1 DAR 0:0 (default)
  
  
  
  Metadata:
  
  
  
    creation_time   : 1970-01-01 00:00:00
  
  
  
    handler_name    : VideoHandler
  
  
  
    encoder         : Lavc57.48.101 libvpx
  
  
  
  Stream #0:1(und): Unknown: none (default)
  
  
  
  Metadata:
  
  
  
    creation_time   : 1970-01-01 00:00:00
  
  
  
    handler_name    : SoundHandler
  
  
  
    encoder         : Lavc57.48.101 libvorbis

  Stream mapping :

  Stream #0:0 -> #0:0 (h264 (native) -> vp8 (libvpx))

  Stream #0:1 -> #0:1 (aac (native) -> vorbis (libvorbis))

  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  ================

  Any suggestions, please ?