Newest 'ffmpeg' Questions - Stack Overflow

Les articles publiés sur le site

• ffmpeg encoding run a shell command

  11 octobre 2013, par user1503606

  How do i run this file

  infile ="video.avi"
  tmpfile="video_tmp.mp4"
  outfile="video.mp4"
  options="-vcodec libx264 -b 512k -flags +loop+mv4 -cmp 256 \
     -partitions +parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 \
     -me_method hex -subq 7 -trellis 1 -refs 5 -bf 3 \
     -flags2 +bpyramid+wpred+mixed_refs+dct8x8 -coder 1 -me_range 16 \
           -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -qmin 10\
     -qmax 51 -qdiff 4"
  
  ffmpeg -y -i "$infile" -an -pass 1 -threads 2 $options "$tmpfile"
  
  ffmpeg -y -i "$infile" -acodec libfaac -ar 44100 -ab 96k -pass 2 -threads 2 $options "$tmpfile"
  
  qt-faststart "$tmpfile" "$outfile"
  

  Taken from here https://gist.github.com/vadimii/4621929

  Shell commands is well out of my scope any help would be appreciated thanks

• FFMPEG on Fedora but PHP Compilation confliction

  11 octobre 2013, par UMI

  I have running Xampp with PHP5.5 on Fedora from Apache Friend, with default settings what the installer package do on Linux.

  When I install FFMPEG successfully and try to load from php.ini it always says:

  *

  11-Oct-2013 14:05:51 Europe/Berlin] PHP Warning:  PHP Startup: ffmpeg: Unable to initialize module
  Module compiled with module API=20060613
  PHP    compiled with module API=20121212
  These options need to match
  in Unknown on line 0
  

  *

  The only thing which is confusing me is that when I did phpize even that I already installed xampp server which means I have PHP running. FFMPEG phpize did not work and I had to install php-devel. Does that mean that FFMPEG is configured with PHP, other than the installed with XAMPP? I am not sure what is happening. Whatever I do I always receive this error message in php_error_log file.

  It is amazing :) that I just run below command to see what version of PHP is, I have and below are the results which are shocking one because I am in a feeling that I have PHP 5.5 installed and running from XAMMP.

  [root@localhost ~]# php -v
  PHP 5.2.6 (cli) (built: May  8 2008 08:53:44)
  Copyright (c) 1997-2008 The PHP Group
  Zend Engine v2.2.0, Copyright (c) 1998-2008 Zend Technologies
  

  How can I get this covered that if I simple install XAMPP server on linux and want to install and configure FFMPEG along with?

• Configure ffmpeg for wowza and wp8

  11 octobre 2013, par Anton Shakalo

  I have mp4 file from my windows phone.

  There is info:

  General
  Format                                   : MPEG-4
  Format profile                           : Base Media / Version 2
  Codec ID                                 : mp42
  
  Video
  Format                                    : AVC
  Codec ID                                 : avc1
  Codec ID/Info                           : Advanced Video Coding
  
  Audio
  Format                                    : AAC
  Format profile                           : LC
  Codec ID                                 : 40
  Bit rate                                   : 96.0 Kbps
  Sampling rate                           : 44.1 KHz
  

  When I stream it to wowza with next ffmpeg command ( I got it from documentation)

  ffmpeg -re -i "C:\sample2.mp4"  -vcodec libx264  -vb 150000 -g 60 -vprofile main -level 2.1 -acodec aac -ab 64000 -ar 48000 -ac 2 -vbsf h264_mp4toannexb  -f mpegts udp://127.0.0.1:10001?pkt_size=1316
  

  In client app I see corrupted video: http://i.imgur.com/fKEMlsB.png

  With sample file provided by wowza streamed video looks fine.

  There is info about sample file from wowza:

  General
  Format                                   : MPEG-4
  Format profile                           : QuickTime
  Codec ID                                 : qt  
  
  Video
  Format                                   : AVC
  Format profile                           : Baseline@L3.0
  Codec ID                                 : avc1
  
  Audio
  Format                                   : AAC
  Format profile                           : LC
  Codec ID                                 : 40
  

  Can you help me with ffmpeg configuring? I read documentation, but understand nothing.

• Apply video effects

  11 octobre 2013, par ishan jain

  I am creating an application, in which I have to give the option to apply different effects (normal, sepia, black & white, vintage, HD) to the VIDEO. I am creating this application for android version 2.3 . I am thinking of following the flow video -> convert to image frames -> apply effect to frames using some library -> convert frames to video.

  Can anyone help me that if above flow is correct or not? And which library I can use for applying effects to the frames or is there any other way to apply the effects to the video?

  Thanks

• Ffmpeg segmenting syntax [migrated]

  10 octobre 2013, par user2868579

  I'm trying to use ffmpeg to break long video files (circa 60mins) with the following requirements: 30sec chunks (fairly exact chunks, no frame loss between chunks) Transcoded to html 5 compatible video Filenames in time code format eg first chunk 00:00:00 second chunk 00:00:30 etc (it would be great if first chunk time could be specified by this would be the cherry on top!)

  So far the closest working script I got was

      ffmpeg -i VID_20130417_140328_555.mp4 -s 480x360 -map 0 -keyint_min 10 -vcodec libx264 -g 60 -vb 500000 -strict experimental -acodec libfaac -f ssegment -segment_list out.list out%03d.ts 
  

  This segments the file into the correct format but I can't control duration or naming.

  Any help greatly appreciated.