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• How to join two ffmpeg commands

  26 novembre 2012, par Ambrose Bwangatto

  i have a script which uses this ffmpeg command's parameters for encoding videos.

  ffmpeg -i inputfile -acodec libfaac -keyint_min 20 -r 20 -vcodec libx264 -vpre hq -crf 25 -b 300k -bt 300k -y -v 0 -bf 16 -threads 0 outputfile

  and i have a custom command i would like to add to it, is like this

  ffmpeg -i inputfile -vf "movie=watermark.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" outputfile

  so i replaced main command like this

   ffmpeg -i inputfile -acodec libfaac -keyint_min 20 -r 20 -vcodec libx264 -vpre hq -crf 25 -b 300k -bt 300k -y -v 0 -bf 16 -threads 0 -vf "movie=watermark1.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" outputfile

  and tried it in command line, but this doesnt do anything, the output is nothing like this

  [root@www test1]#  ffmpeg -i test1800.mp4 -acodec libfaac -keyint_min 20 -r 20 -vcodec libx264 -vpre hq -crf 25 -b 300k -bt 300k -y -v 0 -bf 16 -threads 0 -vf "movie=watermark1.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" outputfile.mp4
  
  [root@www test1]#

  how do i solve this ?

  Thanks for your time.

  UPDATE
  My ffmpeg command details

  [root@www test1]# ffmpeg
  
  ffmpeg version N-47061-gbe2c0bc Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Nov 25 2012 09:32:08 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-52)
  
    configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264
  
    libavutil      52.  9.100 / 52.  9.100
  
    libavcodec     54. 77.100 / 54. 77.100
  
    libavformat    54. 37.100 / 54. 37.100
  
    libavdevice    54.  3.100 / 54.  3.100
  
    libavfilter     3. 23.102 /  3. 23.102
  
    libswscale      2.  1.102 /  2.  1.102
  
    libswresample   0. 17.101 /  0. 17.101
  
    libpostproc    52.  2.100 / 52.  2.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
  
  
  
  Use -h to get full help or, even better, run 'man ffmpeg'

  thanks

• ffmpeg : Image2 => Error while opening encoder

  22 novembre 2012, par user1844282

  I get the following error ffmpeg.

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

  ffmpeg -f image2 -i %05d.jpg -vcodec libx264 foo.mp4

  I'm pretty sure I've used this exact command before and it's been fine. This is my terminal output. Any help would be appreciated.

  $ ffmpeg -f image2 -i %05d.jpg -vcodec libx264 foo.mp4
  
  ffmpeg version 1.0 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Nov 22 2012 17:59:05 with Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
  
    configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libspeex --enable-libfreetype --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid
  
    libavutil      51. 73.101 / 51. 73.101
  
  
  
    libavcodec     54. 59.100 / 54. 59.100
  
  
  
    libavformat    54. 29.104 / 54. 29.104
  
  
  
    libavdevice    54.  2.101 / 54.  2.101
  
  
  
    libavfilter     3. 17.100 /  3. 17.100
  
  
  
    libswscale      2.  1.101 /  2.  1.101
  
  
  
    libswresample   0. 15.100 /  0. 15.100
  
  
  
    libpostproc    52.  0.100 / 52.  0.100
  
  
  
  Input #0, image2, from '%05d.jpg':
  
    Duration: 00:00:04.44, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj420p, 1201x900 [SAR 1:1 DAR 1201:900], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  [libx264 @ 0x7fab0881aa00] width not divisible by 2 (1201x900)
  
  Output #0, mp4, to 'foo.mp4':
  
      Stream #0:0: Video: h264, yuvj420p, 1201x900 [SAR 1:1 DAR 1201:900], q=-1--1, 90k tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg -> libx264)
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

• How to compile c99-to-c89 convertor with clang ?

  27 septembre 2016, par theateist

  I’m trying to compile ffmpeg in windows for VisualStudio and one of the step is to compile c99-to-c89 code with clang according to this post. I managed to create clang.exe but how I compile c99-to-c89 code with it ?

  I changed a little bit the makefile in c99-to-c89 so CC variable points now to clang.exe compiler and not cl.exe

  EXT=.exe
  
  
  
  all: c99conv$(EXT) c99wrap$(EXT)
  
  
  
  CLANGDIR=C:/build
  
  CC=C:/build/bin/Release/clang.exe
  
  CFLAGS=-nologo -Z7 -D_CRT_SECURE_NO_WARNINGS=1 -Dpopen=_popen -Dunlink=_unlink -Dstrdup=_strdup -Dsnprintf=_snprintf -I. -I$(CLANGDIR)/tools/clang/include
  
  LDFLAGS=-nologo -Z7 $(CLANGDIR)/lib/Release/libclang.lib
  
  
  
  clean:
  
      rm -f c99conv$(EXT) c99wrap$(EXT) convert.o compilewrap.o
  
      rm -f unit.c.c unit2.c.c
  
  
  
  test1: c99conv$(EXT)
  
      $(CC) -P unit.c -Fiunit.prev.c
  
      ./c99conv unit.prev.c unit.post.c
  
      diff -u unit.{prev,post}.c
  
  
  
  test2: c99conv$(EXT)
  
      $(CC) -P unit2.c -Fiunit2.prev.c
  
      ./c99conv unit2.prev.c unit2.post.c
  
      diff -u unit2.{prev,post}.c
  
  
  
  test3: c99conv$(EXT)
  
      $(CC) $(CFLAGS) -P -Ficonvert.prev.c convert.c
  
      ./c99conv convert.prev.c convert.post.c
  
      diff -u convert.{prev,post}.c
  
  
  
  c99conv$(EXT): convert.o
  
      $(CC) -Fe$@ $< $(LDFLAGS) $(LIBS)
  
  
  
  c99wrap$(EXT): compilewrap.o
  
      $(CC) -Fe$@ $< $(LDFLAGS)
  
  
  
  %.o: %.c
  
      $(CC) $(CFLAGS) -Fo$@ -c $<

  but when I run make command I get clang: error: unsupported use of internal gcc -Z option '-Z7'. I guess the problem in CFLAGS and LDFLAGS but I don’t know how to fix it because the lack of knowledge in makefile and clang.