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• FFMPEG 'Invalid data found when processing input' while scaling an Image

  22 février 2020, par priya verma

  I just installed FFMPEG on a server and I am testing it to see if it works. I am new to this, so I don’t know if I’m doing it correctly. I want to scale and compress an image. I am doing it by following php code -

  exec("ffmpeg -i $inputImg -vf \"scale='-2':'min(480, ih)\" $outputImg 2>&1", $output, $returnStatus);
  
      print_r($output);
  
      echo '<br />'.$returnStatus;

  The thing is it works for some images and for images it gives an error. For ex. I have tried to compress an image and it returns with error -

  ffmpeg version 2.8.15 Copyright (c) 2000-2018 the FFmpeg developers
  
  [1] => built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-36)
  
  [2] => configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg 
  
  --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man 
  
  --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions 
  
  -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 
  
  -mtune=generic' --extra-ldflags='-Wl,-z,relro ' --enable-libopencore-amrnb 
  
  --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 
  
  --enable-bzlib --disable-crystalhd --enable-gnutls --enable-ladspa 
  
  --enable-libass --enable-libcdio --enable-libdc1394 --enable-libfdk-aac 
  
  --enable-nonfree --disable-indev=jack --enable-libfreetype --enable-libgsm 
  
  --enable-libmp3lame --enable-openal --enable-libopenjpeg --enable-libopus 
  
  --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex 
  
  --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libx264 
  
  --enable-libx265 --enable-libxvid --enable-x11grab --enable-avfilter 
  
  --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping 
  
  --shlibdir=/usr/lib64 --enable-runtime-cpudetect 
  
  [3] => libavutil 54. 31.100 / 54. 31.100 
  
  [4] => libavcodec 56. 60.100 / 56. 60.100 
  
  [5] => libavformat 56. 40.101 / 56. 40.101 
  
  [6] => libavdevice 56. 4.100 / 56. 4.100 
  
  [7] => libavfilter 5. 40.101 / 5. 40.101 
  
  [8] => libavresample 2. 1. 0 / 2. 1. 0 
  
  [9] => libswscale 3. 1.101 / 3. 1.101 
  
  [10] => libswresample 1. 2.101 / 1. 2.101 
  
  [11] => libpostproc 53. 3.100 / 53. 3.100 
  
  [12] => /tmp/phpjLYmRd: Invalid data found when processing input

  Am I doing it incorrectly or what ? Because it does work with some images and for some it doesn’t ! Also, is this the correct way to scale and compress an Image using FFMPEG, would love to get some insights.

• ffmpeg : audio to opus and embed song cover to lossless vp9 in webm container

  14 mars 2020, par snow344

  im having some trouble in making a lossless webm of a audio file

  mpv plays it fine, but youtube won’t process it no matter what

  ffmpeg -i "audio.flac" -c:v vp9 -c:a libopus -lossless 1 -b:a 500k -pix_fmt yuv420p test.webm
  
  
  
      Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
  
      Stream #0:1: Video: mjpeg (Progressive), yuv444p(pc, bt470bg/unknown/unknown), 800x800 [SAR 300:300 DAR 1:1], 90k tbr, 90k tbn, 90k tbc (attached pic)
  
      Metadata:
  
        comment         : Cover (front)
  
  File 'test.webm' already exists. Overwrite? [y/N] y
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (mjpeg (native) -> vp9 (libvpx-vp9))
  
    Stream #0:0 -> #0:1 (flac (native) -> opus (libopus))
  
  Press [q] to stop, [?] for help
  
  [swscaler @ 0000028ef88c6000] deprecated pixel format used, make sure you did set range correctly
  
  [libvpx-vp9 @ 0000028ef854cf00] v1.8.2
  
  Output #0, webm, to 'test.webm':
  
      Stream #0:0: Video: vp9 (libvpx-vp9), yuv420p(progressive), 800x800 [SAR 1:1 DAR 1:1], q=-1--1, 90k fps, 1k tbn, 90k tbc (attached pic)
  
      Metadata:
  
        comment         : Cover (front)
  
        encoder         : Lavc58.73.101 libvpx-vp9
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
  
      Stream #0:1: Audio: opus (libopus), 48000 Hz, stereo, s16, 500 kb/s
  
      Metadata:
  
        encoder         : Lavc58.73.101 libopus
  
  frame=    1 fps=0.2 q=0.0 Lsize=   15327kB time=00:04:11.17 bitrate= 499.9kbits/s speed=53.7x
  
  video:386kB audio:14853kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.574758%

  thanks in advance

• FFMPEG - Width/ Height Not Divisible by 2 (Scaling to Generate MBR Output)

  15 avril 2020, par Sanjeev Pandey

  I am trying to generate multilple variants of videos in my library (Mp4 formats) and have renditions planned ranging from 1080p to 240p and popular sizes in between. For that I am taking a video with a AxB resolution and then running through a code (on bash) which scales them to desired following sizes - 
426x240
640x360
842x480
1280x720
1920x1080, with different bitrates of course, and then saves as Mp4 again.

  



  Now, this works just fine if source video has height and width divisible by 2, but code breaks on the following line for the videos with odd width and height :
-vf scale=w=${width}:h=${height}:force_original_aspect_ratio=decrease"

  



  Where 'width' and 'height' are the desired (and hardcoded) for every iteration : E.g. "426x240", and "640x360"

  



  The Error :
[libx264 @ 00000187da2a1580] width not divisible by 2 (639x360)
Error initializing output stream 1:0 -- Error while opening encoder for output stream #1:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  



  Now approaches those are explained in this one doesn't work for me since I am scaling - FFMPEG (libx264) "height not divisible by 2"

  



  And, I tried this one too but it seems all qualities are getting the same size -ffmpeg : width not divisible by 2 (when keep proportions)

  



  


  

  • This is how I tried to use this one : scale='bitand(oh*dar,65534)':'min(${height},ih)'

  


  


  



  Kindly suggest how to solve this, keeping in view that :
1. I have a very large library and I can't do manual change for every video
2. I need to scale the video and keep the aspect ratio

  



  Thanks !

  



  PS : [Edit] One way that I can see is padding all of the odd height/ weight videos using a second script in advance. This however doubles my work time and load. I would prefer to keep it in single script. This is the script I see that I can use for padding :
```ffmpeg -r 24 -i -vcodec libx264 -y -an -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2"`` (from : FFMPEG (libx264) "height not divisible by 2")