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• Video processing to support different web players and qualities [closed]

  15 mai 2013, par Linas

  I am trying to accomplish something similar to youtube player.

  The biggest issues I'm facing now is how should I process user uploaded video file.

  For example since i want to switch between 240p, 360p, 480p and 720p I need to convert uploaded video file to 4 different files for each resolution, and because not all browsers can play mp4 i need ogg, mp4, webm, so that makes 12 video files, and say if it takes 10 minutes to process 1h video file it would take me about 2h just to process that file which is insane. I know that youtube is ussing cloud servers to process each video file and they have a lot of processing power but I think there some kind of trick to this.

  So my question is what can i do about this, and how does youtube deal with this ?

  My second question is ffmpeg suited for this kind of work, and if so why does this command takes pretty much for ever to finish, I ran this command on a 720p 3minutes long video file and after 15minutes of processing I just canceled the process.

  ffmpeg -i hd.webm a.mp4

  This one on the other hand took about 7 minutes to finish but it generated 200mb video file out of 25mb file

  ffmpeg -i hd.webm -c:v libx264 -preset ultrafast a.mp4

• Expand (extend) a video to an specific duration

  8 février 2013, par BorrajaX

  Do VLC or FFmpeg (or AVconv) have any feature to force the duration of a video to a certain number of seconds ?

  Let's say I have a... 5 minutes .mp4 video (without audio). Is there a way to have any of the aforementioned tools "expanding" the video to a longer duration ? The video comes from a Power Point slideshow, but it's too short (running too fast, to say so). The idea would be automatically inserting frames so it reaches an specified duration. It looks like something pretty doable (erm... for a total newbie in video encoding/transcoding as I am) : A 5 minutes video, at 30fps means I have 9000 frames... To make it be 10 times longer, get the first "real" frame, copy it ten times, then get the second "real" frame, copy it ten times... and so on.

  I'm using Ubuntu 12.04, but I can install/compile any required software, if needed. So far, I have VLC, AVConv and FFmpeg (FFmpeg in an specific folder, so it won't conflict with AVConv)

  Thank you in advance.

• can't compile ffmpeg on Solaris 10 sparc

  9 juin 2014, par Raoul

  Has anyone compiled ffmpeg 0.6.1 for Solaris 10 sparc ? I’m getting the following errors :

      uname -a
  
  SunOS SERVERNAME 5.10 Generic_118833-36 sun4u sparc SUNW,Sun-Fire-V440
  
  
  
  bwddmadm@bwddmliv>/export/home/USERID/ffmpeg-0.6.1/configure --prefix=/export/home/USERID/ffmpegX --extra-cflags="-fPIC" --disable-mmx --disable-protocol=udp --disable-encoder=nellymoser
  
  Broken shell detected.  Trying alternatives.
  
  Trying shell bash
  
  grep: illegal option -- q
  
  Usage: grep -hblcnsviw pattern file . . .
  
  grep: illegal option -- q
  
  Usage: grep -hblcnsviw pattern file . . .
  
  grep: illegal option -- q
  
  Usage: grep -hblcnsviw pattern file . . .
  
  grep: illegal option -- q
  
  Usage: grep -hblcnsviw pattern file . . .
  
  grep: illegal option -- q
  
  Usage: grep -hblcnsviw pattern file . . .
  
  grep: illegal option -- q
  
  Usage: grep -hblcnsviw pattern file . . .
  
  grep: illegal option -- q
  
  Usage: grep -hblcnsviw pattern file . . .
  
  grep: illegal option -- q
  
  Usage: grep -hblcnsviw pattern file . . .
  
  Unknown C compiler gcc
  
  awk: syntax error near line 1
  
  awk: illegal statement near line 1
  
  grep: illegal option -- q
  
  Usage: grep -hblcnsviw pattern file . . .
  
  install prefix            /export/home/USERID/ffmpegX
  
  source path               /export/home/USERID/ffmpeg-0.6.1
  
  C compiler                gcc
  
  .align is power-of-two    no
  
  ARCH                      sparc (generic)
  
  big-endian                no
  
  runtime cpu detection     no
  
  VIS enabled               yes
  
  gprof enabled             no
  
  debug symbols             yes
  
  strip symbols             yes
  
  optimizations             yes
  
  static                    yes
  
  shared                    no
  
  postprocessing support    no
  
  new filter support        no
  
  filters using lavformat   no
  
  network support           yes
  
  threading support         no
  
  SDL support               no
  
  Sun medialib support      no
  
  AVISynth enabled          no
  
  libdc1394 support         no
  
  libdirac enabled          no
  
  libfaac enabled           no
  
  libfaad enabled           no
  
  libfaad dlopened          no
  
  libgsm enabled            no
  
  libmp3lame enabled        no
  
  libnut enabled            no
  
  libopencore-amrnb support no
  
  libopencore-amrwb support no
  
  libopenjpeg enabled       no
  
  librtmp enabled           no
  
  libschroedinger enabled   no
  
  libspeex enabled          no
  
  libtheora enabled         no
  
  libvorbis enabled         no
  
  libvpx enabled            no
  
  libx264 enabled           no
  
  libxvid enabled           no
  
  zlib enabled              no
  
  bzlib enabled             no
  
  
  
  Enabled decoders:
  
  pr:  -- empty file
  
  
  
  Enabled encoders:
  
  pr:  -- empty file
  
  
  
  Enabled hwaccels:
  
  pr:  -- empty file
  
  
  
  Enabled parsers:
  
  pr:  -- empty file
  
  
  
  Enabled demuxers:
  
  pr:  -- empty file
  
  
  
  Enabled muxers:
  
  pr:  -- empty file
  
  
  
  Enabled protocols:
  
  pr:  -- empty file
  
  
  
  Enabled filters:
  
  pr:  -- empty file
  
  
  
  Enabled bsfs:
  
  pr:  -- empty file
  
  
  
  Enabled indevs:
  
  pr:  -- empty file
  
  
  
  Enabled outdevs:
  
  pr:  -- empty file
  
  
  
  License: LGPL version 2.1 or later
  
  Creating config.mak and config.h...
  
  bwddmadm@bwddmliv> gmake
  
  /export/home/USERID/ffmpeg-0.6.1/version.sh: syntax error at line 4: `revision=$' unexpected
  
  CC      libavdevice/alldevices.o
  
  libavdevice/alldevices.c: In function `avdevice_register_all':
  
  libavdevice/alldevices.c:42: error: `CONFIG_ALSA_OUTDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:42: error: (Each undeclared identifier is reported only once
  
  libavdevice/alldevices.c:42: error: for each function it appears in.)
  
  libavdevice/alldevices.c:42: error: `CONFIG_ALSA_INDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:43: error: `CONFIG_AUDIO_BEOS_OUTDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:43: error: `CONFIG_AUDIO_BEOS_INDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:44: error: `CONFIG_BKTR_INDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:45: error: `CONFIG_DV1394_INDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:46: error: `CONFIG_JACK_INDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:47: error: `CONFIG_OSS_OUTDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:47: error: `CONFIG_OSS_INDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:48: error: `CONFIG_V4L2_INDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:49: error: `CONFIG_V4L_INDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:50: error: `CONFIG_VFWCAP_INDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:51: error: `CONFIG_X11_GRAB_DEVICE_INDEV' undeclared (first use in this function)
  
  libavdevice/alldevices.c:54: error: `CONFIG_LIBDC1394_INDEV' undeclared (first use in this function)
  
  gmake: *** [libavdevice/alldevices.o] Error 1
  
  bwddmadm@bwddmliv> exit
  
  
  
  script done on Fri Jan 14 11:34:05 2011