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• FFmpeg : jpeg scaling on amazone linux

  8 août 2016, par Vovik

  I have a need to rescale a jpg image in command line. And I use ffmpeg for that :

  ffmpeg -loglevel debug -i photo.jpg -vf scale=1920:1080 photo_scaled.jpg

  It works perfectly on my work Mac and gives following output :

  Splitting the commandline.
  
  Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'. 
  
  Reading option '-i' ... matched as input file with argument 'photo.jpg'. 
  
  Reading option '-vf' ... matched as option 'vf' (set video filters) with argument 'scale=1920:1080'. 
  
  Reading option 'photo_scaled.jpg' ... matched as output file. Finished splitting the commandline. 
  
  Parsing a group of options: global . 
  
  Applying option loglevel (set logging level) with argument debug. Successfully parsed a group of options. 
  
  Parsing a group of options: input file photo.jpg. Successfully parsed a group of options. 
  
  Opening an input file: photo.jpg. 
  
  [png_pipe @ 0x7fd221810600] Format png_pipe probed with size=2048 and score=99 
  
  [png_pipe @ 0x7fd221810600] Before avformat_find_stream_info() pos: 0 bytes read:32768 seeks:0 
  
  [png_pipe @ 0x7fd221810600] After avformat_find_stream_info() pos: 303755 bytes read:303755 seeks:0 frames:1 Input #0, png_pipe, from 'photo.jpg':   
  
  Duration: N/A, bitrate: N/A
  
  
  
  Stream #0:0, 1, 1/25: Video: png, 1 reference frame, rgb24(pc), 905x509 (0x0), 1/25, 25 tbr, 25 tbn, 25 tbc 
  
  Successfully opened the file. 
  
  Parsing a group of options: output file photo_scaled.jpg. 
  
  Applying option vf (set video filters) with argument scale=1920:1080. Successfully parsed a group of options. 
  
  Opening an output file: photo_scaled.jpg

  But on amazone server it gives me the following :

  Splitting the commandline.
  
  Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
  
  Reading option '-i' ... matched as input file with argument 'photo.jpg'.
  
  Reading option '-vf' ... matched as option 'vf' (set video filters) with argument 'scale=1920:1080'.
  
  Reading option 'photo_scaled.jpg' ... matched as output file.
  
  Finished splitting the commandline.
  
  Parsing a group of options: global .
  
  Applying option loglevel (set logging level) with argument debug.
  
  Successfully parsed a group of options.
  
  Parsing a group of options: input file photo.jpg.
  
  Successfully parsed a group of options.
  
  Opening an input file: photo.jpg.
  
  [AVIOContext @ 0x372f700] Statistics: 303755 bytes read, 0 seeks
  
  [mjpeg @ 0x372c6a0] marker=f9 avail_size_in_buf=303444
  
  [mjpeg @ 0x372c6a0] marker parser used 0 bytes (0 bits)
  
  [mjpeg @ 0x372c6a0] marker=de avail_size_in_buf=303438
  
  [mjpeg @ 0x372c6a0] marker parser used 0 bytes (0 bits)
  
  [mjpeg @ 0x372c6a0] marker=fd avail_size_in_buf=302501
  
  [mjpeg @ 0x372c6a0] marker parser used 0 bytes (0 bits)
  
  [mjpeg @ 0x372c6a0] marker=f3 avail_size_in_buf=298342
  
  [mjpeg @ 0x372c6a0] marker parser used 0 bytes (0 bits)
  
  [mjpeg @ 0x372c6a0] marker=f8 avail_size_in_buf=297965
  
  [mjpeg @ 0x372c6a0] invalid id 248
  
  [image2 @ 0x372b880] decoding for stream 0 failed
  
  [image2 @ 0x372b880] Could not find codec parameters for stream 0 (Video: mjpeg): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  photo.jpg: could not find codec parameters

  As I checked, the configuration of ffmpeg is different.
  On linux :

  ffmpeg version N-63893-gc69defd
  
  built on Jul 16 2014 05:38:01 with gcc 4.6 (Debian 4.6.3-1)
  
  configuration: --prefix=/root/ffmpeg-static/64bit --extra-cflags='-I/root/ffmpeg-static/64bit/include -static' --extra-ldflags='-L/root/ffmpeg-static/64bit/lib -static' --extra-libs='-lxml2 -lexpat -lfreetype' --enable-static --disable-shared --disable-ffserver --disable-doc --enable-bzlib --enable-zlib --enable-postproc --enable-runtime-cpudetect --enable-libx264 --enable-gpl --enable-libtheora --enable-libvorbis --enable-libmp3lame --enable-gray --enable-libass --enable-libfreetype --enable-libopenjpeg --enable-libspeex --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-version3 --enable-libvpx
  
  libavutil      52. 89.100 / 52. 89.100
  
  libavcodec     55. 66.101 / 55. 66.101
  
  libavformat    55. 43.100 / 55. 43.100
  
  libavdevice    55. 13.101 / 55. 13.101
  
  libavfilter     4.  8.100 /  4.  8.100
  
  libswscale      2.  6.100 /  2.  6.100
  
  libswresample   0. 19.100 /  0. 19.100
  
  libpostproc    52.  3.100 / 52.  3.100

  On Mac :

  ffmpeg version 2.8.5 Copyright (c) 2000-2016 the FFmpeg developers
  
  built with Apple LLVM version 7.0.2 (clang-700.1.81)
  
  configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.5 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
  
  libavutil      54. 31.100 / 54. 31.100
  
  libavcodec     56. 60.100 / 56. 60.100
  
  libavformat    56. 40.101 / 56. 40.101
  
  libavdevice    56.  4.100 / 56.  4.100
  
  libavfilter     5. 40.101 /  5. 40.101
  
  libavresample   2.  1.  0 /  2.  1.  0
  
  libswscale      3.  1.101 /  3.  1.101
  
  libswresample   1.  2.101 /  1.  2.101
  
  libpostproc    53.  3.100 / 53.  3.100

  But what is specific to image scaling in the difference ? And how to make amazone linux’s version of ffmpeg work same way as Mac’s version (at least, in the case) ?

• Is there any liability regarding ffmpeg ? [closed]

  28 novembre 2023, par kenan bahadir

  My question is as follows : I want to upload a short video to YouTube. I have the code below, but it does not work as I want. Can you help me ?
crop_command = f'ffmpeg -i "input_file" -filter_complex "crop=1080:1080:420:0,scale=1920:1920:flags=lanczos" -acodec aac -strict experimental "temp_output_file"'
os.system(crop_command)

  


  My question is as follows : I want to upload a short video to YouTube. I have the code below, but it does not work as I want.
crop_command = f'ffmpeg -i "input_file" -filter_complex "crop=1080:1080:420:0,scale=1920:1920:flags=lanczos" -acodec aac -strict experimental "temp_output_file"'
os.system(crop_command)

  


• Slideshow from .jpg

  13 octobre 2023, par DJArty

  Have an command to make slideshow from *.jpg files :

  


  ffmpeg -r 1/3 -f concat -safe 0 -i <(ls -v *.jpg | sed "s|^|file '$PWD/|") -vf "scale='min(1920,iw)':min'(1080,ih)':force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2" -c:v libx264 -pix_fmt yuv420p -r 60 -preset slow -crf 14 slideshow.mp4

  


  Need good effects from one jpg to another like morphing or just fade in fade out, not just "one picture 3 sec, next picture 3 sec, etc."

  


  need nicey slideshow