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• How to set up a cron job for ffmpeg in centOS 6

  9 mars 2018, par user27240

  I can convert from mp4 file to jpg file manually one by one with the below command on centOS 6 environment.

  Now, could anyone help me out how to set up a cron for any mp4 file in the directory to be converted automatically
  to jpg file with the same file name as mp4 file such as 03052022_5a9d28723d2da.jpg for the below environment ?

  OS：centos-6 (x86_64)

  ffmpeg version 2.2.2

  Plesk 17.0.17

  [root@server-xxxxxxxx-x ~]# ffmpeg -i                                \
  
    /var/www/vhosts/xxxxx.com/httpdocs/save/03052022_5a9d28723d2da.mp4 \
  
    /var/www/vhosts/xxxxx.com/httpdocs/save/03052022_5a9d28723d2da.jpg

  With ’s/.conf$/.jpg/p’ :

  [root@server-xxxxxx-x ~]# for i in `find /var/www/vhosts/xxxxxx.com/httpdocs/save/ -type f -name "*.mp4"`; do ffmpeg -i $i `echo $i | sed -En 's/.conf$/.jpg/p'`; done

  ffmpeg version 2.2.2 Copyright (c) 2000-2014 the FFmpeg developers
  built on Feb 21 2018 03:03:24 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-18)
  configuration :
  libavutil 52. 66.100 / 52. 66.100
  libavcodec 55. 52.102 / 55. 52.102
  libavformat 55. 33.100 / 55. 33.100
  libavdevice 55. 10.100 / 55. 10.100
  libavfilter 4. 2.100 / 4. 2.100
  libswscale 2. 5.102 / 2. 5.102
  libswresample 0. 18.100 / 0. 18.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ’/var/www/vhosts/xxxxxx.com/httpdocs/save/03081956_5aa116c836015.mp4’ :
  Metadata :
  major_brand : mp42
  minor_version : 0
  compatible_brands : isommp42
  creation_time : 2018-02-14 04:42:34
  Duration : 00:00:00.83, start : 0.000000, bitrate : 23270 kb/s
  Stream #0:0(eng) : Video : h264 (Baseline) (avc1 / 0x31637661), yuvj420p(pc, smpte170m), 1920x1080, 25370 kb/s, SAR 65536:65536 DAR 16:9, 29.73 fps, 30 tbr, 90k tbn, 180k tbc (default)
  Metadata :
  rotate : 90
  creation_time : 2018-02-14 04:42:34
  handler_name : VideoHandle
  Stream #0:1(eng) : Audio : aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default)
  Metadata :
  creation_time : 2018-02-14 04:42:34
  handler_name : SoundHandle
  At least one output file must be specified
  Conversion failed !

  With "s/.conf$/.jpg/p" :

  [root@server-xxxxxxx-x ~]# for i in `find /var/www/vhosts/xxxxxx.com/httpdocs/save/ -type f -name "*.mp4"`; do ffmpeg -i $i `echo $i | sed -En "s/.conf$/.jpg/p"`; done

  ffmpeg version 2.2.2 Copyright (c) 2000-2014 the FFmpeg developers
  built on Feb 21 2018 03:03:24 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-18)
  configuration :
  libavutil 52. 66.100 / 52. 66.100
  libavcodec 55. 52.102 / 55. 52.102
  libavformat 55. 33.100 / 55. 33.100
  libavdevice 55. 10.100 / 55. 10.100
  libavfilter 4. 2.100 / 4. 2.100
  libswscale 2. 5.102 / 2. 5.102
  libswresample 0. 18.100 / 0. 18.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ’/var/www/vhosts/xxxxxx.com/httpdocs/save/03081956_5aa116c836015.mp4’ :
  Metadata :
  major_brand : mp42
  minor_version : 0
  compatible_brands : isommp42
  creation_time : 2018-02-14 04:42:34
  Duration : 00:00:00.83, start : 0.000000, bitrate : 23270 kb/s
  Stream #0:0(eng) : Video : h264 (Baseline) (avc1 / 0x31637661), yuvj420p(pc, smpte170m), 1920x1080, 25370 kb/s, SAR 65536:65536 DAR 16:9, 29.73 fps, 30 tbr, 90k tbn, 180k tbc (default)
  Metadata :
  rotate : 90
  creation_time : 2018-02-14 04:42:34
  handler_name : VideoHandle
  Stream #0:1(eng) : Audio : aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default)
  Metadata :
  creation_time : 2018-02-14 04:42:34
  handler_name : SoundHandle
  At least one output file must be specified
  Conversion failed !

  With "s/.mp4$/.jpg/p"

  [root@server-xxxxx-x ~]# for i in `find /var/www/vhosts/xxxxxx.com/httpdocs/save/ -type f -name "*.mp4"`; do ffmpeg -i $i `echo $i | sed -En "s/.mp4$/.jpg/p"`; done

  [image2 @ 0x2c488e0] Could not get frame filename number 2 from pattern ’/var/www/vhosts/xxxxxx.com/httpdocs/save/03100013_5aa2a49bb67bc.jpg’ (either set updatefirst or use a pattern like %03d within the filename pattern)
  av_interleaved_write_frame() : Invalid argument
  frame= 2 fps=0.0 q=3.2 Lsize=N/A time=00:00:00.06 bitrate=N/A
  video:289kB audio:0kB subtitle:0 data:0 global headers:0kB muxing overhead -100.007446%
  Conversion failed !

• cbs_h264 : Fix overflow in shifts

  11 mars 2018, par Mark Thompson

  cbs_h264 : Fix overflow in shifts
  The type of the result of a shift operation is unaffected by the type of
  
  the right operand, so some existing code overflows with undefined behaviour
  
  when the element length is 32.  Add a helper macro to calculate the maximum
  
  value correctly and then use it everywhere this pattern appears.
  Found-by : Andreas Rheinhardt <andreas.rheinhardt@googlemail.com>
  

  • [DH] libavcodec/cbs_h264_syntax_template.c
  • [DH] libavcodec/cbs_internal.h

• avformat/libopenmpt : Probe file format from file data if possible

  21 février 2018, par Jörn Heusipp

  avformat/libopenmpt : Probe file format from file data if possible
  When building with libopenmpt 0.3, use the libopenmpt file header
  
  probing functions for probing. libopenmpt probing functions are
  
  allocation-free and designed to be as fast as possible.
  For libopenmpt 0.2, or when libopenmpt 0.3 file header probing cannot
  
  probe successfully due to too small probe buffer, test the filename
  
  against the file extensions supported by the libopenmpt library that
  
  is actually linked, instead of relying on a hard-coded file extension
  
  list. File extension testing is also allocation-free and designed to
  
  be fast in libopenmpt. Avoiding a hard-coded file extension list is
  
  useful because later libopenmpt versions will likely add support for
  
  more module file formats.
  libopenmpt file header probing is tested regularly against the FATE
  
  suite and other diverse file collections by libopenmpt upstream in
  
  order to avoid false positives.
  FATE passes with './configure —enable-libopenmpt' as well as with
  
  './configure —enable-libopenmpt —enable-libmodplug'.
  libopenmpt probing adds about 5%..10% cpu time (depending on precise
  
  usage pattern and host CPU and compiler version used for libopenmpt)
  
  compared to all current internal FFmpeg probing functions combined in
  
  tools/probetest for all of its module formats combined (currently 41
  
  modules formats in libopenmpt 0.3.4 and 234 file formats in FFmpeg).
  Signed-off-by : Jörn Heusipp <osmanx@problemloesungsmaschine.de>
  
  Reviewed-by : Josh de Kock <josh@itanimul.li>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/libopenmpt.c