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• How to convert multiple files from mp4 to flv using a shell script

  22 avril 2013, par jerdiggity

  Assuming I had a bunch of videos sitting inside the directory /home/user/videos/awaiting_conversion how would I go about using cron to run a script similar to this one to batch convert each video into a different format ?

  /bin/sh -c $'nice /usr/bin/ffmpeg -i \044'\'$'/home/user/videos/awaiting_conversion/video_file_1.mp4'\'$' -s \044'\'$'480x320'\'$' -vcodec libx264 -acodec libmp3lame -ab \044'\'$'64k'\'$' -vpre fast -crf \044'\'$'30'\'$' -ar \044'\'$'22050'\'$' -f flv -y \044'\'$'/home/user/videos/converted/video_file_1.flv'\'$''

  The above script works fine for a single conversion, but :

  1. It assumes that the name of the video is static/known (which will not be the case when batch converting).
  2. It assumes that there is only one video to convert (which may or may not be the case), i.e. there's no "loop".
  3. It leaves the original file in place instead of deleting it (which is what I would want to happen to prevent duplicate conversions).

  The ultimate question would be how do I run that script for each video that exists inside /home/user/videos/awaiting_conversion, passing the file name as a variable ?

• CentOS 7.4.1708 : ERROR : x265 not found using pkg-config

  16 novembre 2017, par Adrian

  I’m trying to compile ffmpeg with Nvidia support following the guides on https://trac.ffmpeg.org/wiki/CompilationGuide/Centos and https://developer.nvidia.com/ffmpeg. I’ve ended up with the following command :

  PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure --enable-pthreads --disable-w32threads --prefix="$HOME/ffmpeg_build"   --pkg-config-flags="--static"   --extra-cflags="-I$HOME/ffmpeg_build/include -I/usr/local/cuda/include"   --extra-ldflags="-L$HOME/ffmpeg_build/lib -L/usr/local/cuda/lib64"   --extra-libs='-lpthread -lm'   --bindir="$HOME/bin"   --enable-gpl   --enable-libfdk_aac   --enable-libfreetype   --enable-libmp3lame   --enable-libopus   --enable-libvorbis   --enable-libvpx   --enable-libx264  --enable-libx265    --enable-nonfree --enable-cuda --enable-cuvid --enable-nvenc --enable-nonfree --enable-libnpp

  I’m getting the wonderful error

  ERROR : x265 not found using pkg-config

  looking in ffbuild/config.log reveals the following error :

  gcc -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -I/home/agilbert/ffmpeg_build/include -I/usr/local/cuda/include -std=c11 -fomit-frame-pointer -pthread -I/home/agilbert/ffmpeg_build/include -I/usr/include/freetype2 -I/home/agilbert/ffmpeg_build/include/opus -I/home/agilbert/ffmpeg_build/include/opus -I/home/agilbert/ffmpeg_build/include -I/home/agilbert/ffmpeg_build/include -I/home/agilbert/ffmpeg_build/include -I/home/agilbert/ffmpeg_build/include -I/home/agilbert/ffmpeg_build/include -I/home/agilbert/ffmpeg_build/include -I/home/agilbert/ffmpeg_build/include -I/home/agilbert/ffmpeg_build/include -L/home/agilbert/ffmpeg_build/lib -c -o /tmp/ffconf.MfrVBc4k/test.o /tmp/ffconf.MfrVBc4k/test.c
  
  In file included from /tmp/ffconf.MfrVBc4k/test.c:1:0:
  
  /home/agilbert/ffmpeg_build/include/x265.h:1753:40: error: expected ';', ',' or ')' before '&' token
  
   FILE* x265_csvlog_open(const x265_param& param);
  
                                          ^
  
  /home/agilbert/ffmpeg_build/include/x265.h:1757:40: error: expected ';', ',' or ')' before '&' token
  
   void x265_csvlog_frame(const x265_param& param, const x265_picture& pic);
  
                                          ^
  
  /home/agilbert/ffmpeg_build/include/x265.h:1762:64: error: expected ';', ',' or ')' before '&' token
  
   void x265_csvlog_encode(x265_encoder *encoder, const x265_stats& stats, int argc, char** argv);
  
                                                                  ^
  
  /home/agilbert/ffmpeg_build/include/x265.h:1766:36: error: expected ';', ',' or ')' before '&' token
  
   void x265_dither_image(x265_picture& pic, int picWidth, int picHeight, int16_t *errorBuf, int bitDepth);
  
                                      ^
  
  /home/agilbert/ffmpeg_build/include/x265.h:1815:50: error: expected ';', ',' or ')' before '&' token
  
       FILE*         (*csvlog_open)(const x265_param&);
  
                                                    ^
  
  /home/agilbert/ffmpeg_build/include/x265.h:1816:51: error: expected ';', ',' or ')' before '&' token
  
       void          (*csvlog_frame)(const x265_param&, const x265_picture&);
  
                                                     ^
  
  /home/agilbert/ffmpeg_build/include/x265.h:1817:67: error: expected ';', ',' or ')' before '&' token
  
       void          (*csvlog_encode)(x265_encoder*, const x265_stats&, int, char**);
  
                                                                     ^
  
  /home/agilbert/ffmpeg_build/include/x265.h:1818:47: error: expected ';', ',' or ')' before '&' token
  
       void          (*dither_image)(x265_picture&, int, int, int16_t*, int);
  
                                                 ^
  
  /home/agilbert/ffmpeg_build/include/x265.h:1820:1: warning: no semicolon at end of struct or union [enabled by default]
  
   } x265_api;
  
   ^

  gcc version is gcc-4.8.5-16.el7.x86_64

  As per a question below : Yes - x265 is installed as per https://trac.ffmpeg.org/wiki/CompilationGuide/Centos and yes pkg-config is finding it. The compilation error makes me think that I’m missing a flag to the —pkg-config-flags optnion, but I can’t find one that works.

  Does anyone know what I should be passing to pkg-config to get it to enable x265 ?

• Issue with FFMPEG drawtext

  25 septembre 2018, par Tim Baker

  ffmpeg -i /home/mysite/public_html/videos/thankyou/thankyou_1.mp4 -strict -2 -vf 
  
  "[in]drawtext=fontfile=/home/mysite/fonts/OswaldFont/Oswald-Bold.ttf: x=450: 
  
  y=150: fontsize=152: fontcolor=0xAE0216@1: draw='if(gt(n,40),lt(n,300))':
  
  text='THANK YOU',drawtext=fontfile=/home/mysite/fonts/OswaldFont/Oswald-Bold.ttf: 
  
  x=450: y=320: fontsize=200: fontcolor=0xAE0216@1: draw='if(gt(n,50),lt(n,300))':
  
  text='JAMISON'" /home/mysite/public_html/videos/thankyou_2.mp4

  When running the above, I’m getting the following. It seems to run properly on other distributions. Not sure where to check next.

  [Parsed_drawtext_0 @ 0x2835480] Option 'draw' not found
  
  [AVFilterGraph @ 0x283f980] Error initializing filter 'drawtext' with args 'fontfile=/home/mysite/fonts/OswaldFont/Oswald-Bold.ttf: x=450: y=150: fontsize=152: fontcolor=0xAE0216@1: draw=if(gt(n,40),lt(n,300)): text=THANK YOU'
  
  
  
  Error opening filters!

  Additionally, this original command works fine in Ubuntu, but give the seen error when running in centOS.