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• ffmpeg showing "Error initializing output stream 0:0"

  31 juillet 2017, par user2565010

  I am running the following command

  ffmpeg -i DJI_0001.MOV DJI_0001.mp4

  in order to convert the video to mp4 from MOV with no other property changes.

  The issue is that I am getting :

  ffmpeg version N-86863-g2ba20d799a-static http://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 6.4.0 (Debian 6.4.0-2) 20170724
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg
  
    libavutil      55. 69.100 / 55. 69.100
  
    libavcodec     57.102.100 / 57.102.100
  
    libavformat    57. 76.100 / 57. 76.100
  
    libavdevice    57.  7.100 / 57.  7.100
  
    libavfilter     6. 95.100 /  6. 95.100
  
    libswscale      4.  7.101 /  4.  7.101
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'DJI_0001.MOV':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 538182144
  
      compatible_brands: qt  
  
      creation_time   : 2017-07-23T17:04:58.000000Z
  
      location        : 
  
      location-{    : 
  
      comment         : 0.9.142
  
    Duration: 00:00:17.89, start: 0.000000, bitrate: 60017 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 4096x2160 [SAR 1:1 DAR 256:135], 60014 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
  
      Metadata:
  
        creation_time   : 2017-07-23T17:04:58.000000Z
  
        handler_name    : DJI.AVC
  
        encoder         : Dji AVC encoder
  
  File 'DJI_0001.mp4' already exists. Overwrite ? [y/N] y
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x3ed56a0] using SAR=1/1
  
  [libx264 @ 0x3ed56a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  Conversion failed!

  I see no other error message that would indicate an underlying problem. Could anybody please give me some info on how should I fix it ?

• ffmpeg with libsoxr resolve dependecies

  15 février 2014, par Jelly

  I'm trying to compile ffmpeg with libsoxr, so I use the flag --enable-libsoxr when calling ./configure. I have installed libsoxr, and the location of the headers added to PATH. However when I try to compile it I get an error : ERROR: libsoxr not found, and in config.log it says :

  fatal error: soxr.h: No such file or directory
  
   #include 

  I think ./configure doesn't make use of PATH or something...Is there another way to specify dependencies for ffmpeg ?

• How can I resize an image then centralize it with a white background ? Can it be done using php-Imagine library ?

  6 février 2017, par BOBO

  The effect I would like to generate is exactly like the example in
  this StackOverflow thread : (Related Question)

  1.Resize image
  2.Keep proportion
  3.Add or Fill none-image areas with white background

  Here are three examples of this process below :
  1. If original is square no matter 640*640 or 1024*1024, just resize it to target dimension e.g. 480*480 will work.
  

  2. If the original input is vertical rectangular,the output should not be cropped
     and still be centerlized as below (the red dash edge marker is just make it easier to see the background is white and the proportion is kept after image resized to 480*480 px)
     

  3. if the original input is horizontal rectangular, output like below, white background, keeps proportion and image uncroped , thus without losing anything after the image processing.
     

  So after I’ve clarified such a question,
  I would like to know :

  1. Is there a general name of such Custom Image Resize mentioned above ?
  2. would like to know how to achieve it using php image library Imagine ?
     is it doable using php-imagine, or have to switch to another library, e.g imagemagick ?

  P.S. If you would like to achieve the effect either in image-resizing or video resizing, you can use below FFMPEG single-line command.
  (thanks to @Mulvya, yes below code applies both to videos and image formats)

  [run below built-in code in ffmpeg console to achieve the mentioned resize effect]

  [video resize]

  ffmpeg -i "[raw video url or videofile location.mp4]"  -vf "scale=iw*min(480/iw\,480/ih):ih*min(480/iw\,480/ih),pad=480:480:(480-iw)/2:(480-ih)/2:color=white" [save_path_and_filename].mp4  

  [image resize]

  ffmpeg -i "[raw image url or imagefile location.jpg]"  -vf "scale=iw*min(480/iw\,480/ih):ih*min(480/iw\,480/ih),pad=480:480:(480-iw)/2:(480-ih)/2:color=white" [save_path_and_filename].jpg