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  • L’espace de configuration de MediaSPIP

    29 novembre 2010, par

    L’espace de configuration de MediaSPIP est réservé aux administrateurs. Un lien de menu "administrer" est généralement affiché en haut de la page [1].
    Il permet de configurer finement votre site.
    La navigation de cet espace de configuration est divisé en trois parties : la configuration générale du site qui permet notamment de modifier : les informations principales concernant le site (...)

  • Déploiements possibles

    31 janvier 2010, par

    Deux types de déploiements sont envisageable dépendant de deux aspects : La méthode d’installation envisagée (en standalone ou en ferme) ; Le nombre d’encodages journaliers et la fréquentation envisagés ;
    L’encodage de vidéos est un processus lourd consommant énormément de ressources système (CPU et RAM), il est nécessaire de prendre tout cela en considération. Ce système n’est donc possible que sur un ou plusieurs serveurs dédiés.
    Version mono serveur
    La version mono serveur consiste à n’utiliser qu’une (...)

  • Sélection de projets utilisant MediaSPIP

    29 avril 2011, par

    Les exemples cités ci-dessous sont des éléments représentatifs d’usages spécifiques de MediaSPIP pour certains projets.
    Vous pensez avoir un site "remarquable" réalisé avec MediaSPIP ? Faites le nous savoir ici.
    Ferme MediaSPIP @ Infini
    L’Association Infini développe des activités d’accueil, de point d’accès internet, de formation, de conduite de projets innovants dans le domaine des Technologies de l’Information et de la Communication, et l’hébergement de sites. Elle joue en la matière un rôle unique (...)

Sur d’autres sites (4117)

  • convert lower bitrate mp3 to higher bit rate [closed]

    6 mars 2016, par janeman

    i had 2000 songs in 128 kbps but in my server space was not there so i have compressed those mp3 to 16kbps and found ok quality on my pc but when i was listening those songs on my iphone i found that sound quality is not good so now i wan t to convert those 16kbps songs to 48kbps which i think will give good sound quality so that users cant differentiate that songs are compressed and it will load fast as well .here is the ffmpeg code i have used to convert 16kbps file to 48kbps . i can see that the size of converted file has increased approx 3 fold but not sure whether it will give the better quality mp3 when i increase the bit rate through conversion .please suggest any way to get my file back with good mp3 quality

      <?php  
    
 if ( exec('ffmpeg  -i /pathtomp3folder/test.mp3  -acodec libmp3lame  -ab 48k -ac 1 -ar 44100  /pathtomp3folder/oputput.mp3'))
    

    
   {
    
  echo 'done!!';
    
  }
    

    
  ?>

    i can do below code as well wthout specifying the frequency which is best way to do

       ffmpeg  -i /pathtomp3folder/test.mp3  -acodec libmp3lame  -ab 48k -ac 1   /pathtomp3folder/oputput.mp3
    

    
  {
    
  echo 'done!!';
    
   }

    i dont see much difference in 16kbps and converted file quality however size got increased 3 times in converted file

    what is the minimum kbps we should prefer so that users cant detect the difference and i get high streaming rate as well without buffering .i am targetting mobile device so please suggest about mobile device

    size of 16 kbps file was 745kb and size of 48kbps file is 1840kb

    where i am doing mistake any idea or if anyone can share his experinene it will be a great help .i have stuggled to get my collection of 2000 songs back as i dont have backup and in my pc the quality of mp3 seems to be ok but when i play in iphone it clearly shows that its of low quality

    in my server ffmpeg is installed and working properly so it is easily converting the bit rate .one more thing i want to know when the bit rate is getting changed from 16kbps to 48 kbps what is the changes in quality ???/ as i can clearly see that size is increasing but the quality remains same

  • C - FFmpeg streaming from a C program ?

    8 août 2016, par golmschenk

    I’m looking to replicate an FFmpeg command-line command in my C code. Specifically I would like to be able to run :

    ffmpeg -re -i video.mp4 -f mpegts udp://localhost:7777

    One thing I’ve noticed when looking at people’s code who have used the libraries of FFmpeg in their own code is that they often have a few hundred lines of code for a single command similar to an FFmpeg command-line command. I’m guessing this is just because they are doing something very specific, because if I can run that short command on my command line and get what I want it should probably only take about ten lines of code to do the same thing in my C code. This should only take about that much work right ? Why would it take much more ?

    I’m having a bit of difficulty finding explanations on how to use the streaming capabilities of the FFmpeg libraries that aren’t overly complex because they’re for a very specific purpose. Can anyone explain how I might go about writing the code for the above command ? Or at the very least point me to some documentation explaining how to write such a script/program ? Thank you much !

    EDIT : I do hope to run this from an iPhone app eventually so I won’t just be able to straight up call FFmpeg from my program. I’ll need to use the libraries used by FFmpeg.

  • ffmpeg error when using non root user

    29 août 2014, par mkern

    I have installed ffmpeg and it works perfect if you are root or using sudo but it errors out when trying to use it as a non-root user. I have performed the same install on a test VPS and it installs without issue so it appears to be isolated to this cPanel server. I haven’t been able to identify why.

    Non-Root :

    > ffmpeg -v debug -i 1.mov 1.avi ffmpeg version N-65949-g0ddb051
    
> Copyright (c) 2000-2014 the FFmpeg developers   built on Aug 28 2014
    
> 11:39:47 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)  
    
> configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis
    
> --enable-libvpx --enable-libx264   libavutil      54.  7.100 / 54.  7.100   libavcodec     56.  0.101 / 56.  0.101   libavformat    56.  3.100 / 56.  3.100   libavdevice    56.  0.100 / 56.  0.100   libavfilter     5.  0.103 /  5.  0.103   libswscale      3.  0.100 / 
    
> 3.  0.100   libswresample   1.  1.100 /  1.  1.100   libpostproc    53.  0.100 / 53.  0.100 Splitting the commandline. Reading option '-v' ... matched as option 'v' (set logging level) with argument 'debug'.
    
> Reading option '-i' ... matched as input file with argument '1.mov'.
    
> Reading option '1.avi' ... matched as output file. Finished splitting
    
> the commandline. Parsing a group of options: global . Applying option
    
> v (set logging level) with argument debug. Successfully parsed a group
    
> of options. Parsing a group of options: input file 1.mov. Successfully
    
> parsed a group of options. Opening an input file: 1.mov.
    
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x348fc20] Format mov,mp4,m4a,3gp,3g2,mj2
    
> probed with size=2048 and score=100 [mov,mp4,m4a,3gp,3g2,mj2 @
    
> 0x348fc20] ISO: File Type Major Brand: qt   [mov,mp4,m4a,3gp,3g2,mj2 @
    
> 0x348fc20] Before avformat_find_stream_info() pos: 698348 bytes
    
> read:39602 seeks:1 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x348fc20] All info
    
> found [mov,mp4,m4a,3gp,3g2,mj2 @ 0x348fc20] After
    
> avformat_find_stream_info() pos: 169190 bytes read:2333362 seeks:67
    
> frames:148 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mov':  
    
> Metadata:
    
>     major_brand     : qt  
    
>     minor_version   : 0
    
>     compatible_brands: qt  
    
>     creation_time   : 2014-06-05 04:40:27
    
>     model           : iPhone 5
    
>     model-eng       : iPhone 5
    
>     encoder         : 7.1.1
    
>     encoder-eng     : 7.1.1
    
>     date            : 2014-06-04T21:40:27-0700
    
>     date-eng        : 2014-06-04T21:40:27-0700
    
>     make            : Apple
    
>     make-eng        : Apple   Duration: 00:00:07.15, start: 0.000023, bitrate: 781 kb/s
    
>     Stream #0:0(und), 41, 1/600: Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 480x360, 1/1200, 710 kb/s, 29.09
    
> fps, 600 tbr, 600 tbn, 1200 tbc (default)
    
>     Metadata:
    
>       rotate          : 90
    
>       creation_time   : 2014-06-05 04:40:27
    
>       handler_name    : Core Media Data Handler
    
>       encoder         : H.264
    
>     Side data:
    
>       displaymatrix: rotation of -90.00 degrees
    
>     Stream #0:1(und), 107, 1/44100: Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
    
>     Metadata:
    
>       creation_time   : 2014-06-05 04:40:27
    
>       handler_name    : Core Media Data Handler Successfully opened the file. Parsing a group of options: output file 1.avi. Successfully
    
> parsed a group of options. Opening an output file: 1.avi. Successfully
    
> opened the file. detected 24 logical cores [graph 0 input from stream
    
> 0:0 @ 0x34aa3a0] Setting 'video_size' to value '480x360' [graph 0
    
> input from stream 0:0 @ 0x34aa3a0] Setting 'pix_fmt' to value '0'
    
> [graph 0 input from stream 0:0 @ 0x34aa3a0] Setting 'time_base' to
    
> value '1/600' [graph 0 input from stream 0:0 @ 0x34aa3a0] Setting
    
> 'pixel_aspect' to value '0/1' [graph 0 input from stream 0:0 @
    
> 0x34aa3a0] Setting 'sws_param' to value 'flags=2' [graph 0 input from
    
> stream 0:0 @ 0x34aa3a0] Setting 'frame_rate' to value '320/11' [graph
    
> 0 input from stream 0:0 @ 0x34aa3a0] w:480 h:360 pixfmt:yuv420p
    
> tb:1/600 fr:320/11 sar:0/1 sws_param:flags=2 [format @ 0x3496b00]
    
> compat: called with args=[yuv420p] [format @ 0x3496b00] Setting
    
> 'pix_fmts' to value 'yuv420p' [AVFilterGraph @ 0x348f320]
    
> query_formats: 4 queried, 3 merged, 0 already done, 0 delayed
    
> [AVFilterGraph @ 0x34bbe60] Error initializing threading.
    
> [AVFilterGraph @ 0x34bbe60] Error creating filter 'anull' Error
    
> opening filters! [AVIOContext @ 0x34967c0] Statistics: 0 seeks, 0
    
> writeouts [AVIOContext @ 0x348f1e0] Statistics: 2333362 bytes read, 67
    
> seeks

    [AVFilterGraph @ 0x34bbe60] Error initializing threading.
    [AVFilterGraph @ 0x34bbe60] Error creating filter ’anull’ Error
    opening filters !

    As ROOT :

    ffmpeg -v verbose -i 1.mov 1.avi
    
ffmpeg version N-65949-g0ddb051 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Aug 28 2014 11:39:47 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)
    
  configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264
    
  libavutil      54.  7.100 / 54.  7.100
    
  libavcodec     56.  0.101 / 56.  0.101
    
  libavformat    56.  3.100 / 56.  3.100
    
  libavdevice    56.  0.100 / 56.  0.100
    
  libavfilter     5.  0.103 /  5.  0.103
    
  libswscale      3.  0.100 /  3.  0.100
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  0.100 / 53.  0.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mov':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 0
    
    compatible_brands: qt  
    
    creation_time   : 2014-06-05 04:40:27
    
    model           : iPhone 5
    
    model-eng       : iPhone 5
    
    encoder         : 7.1.1
    
    encoder-eng     : 7.1.1
    
    date            : 2014-06-04T21:40:27-0700
    
    date-eng        : 2014-06-04T21:40:27-0700
    
    make            : Apple
    
    make-eng        : Apple
    
  Duration: 00:00:07.15, start: 0.000023, bitrate: 781 kb/s
    
    Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 480x360, 710 kb/s, 29.09 fps, 600 tbr, 600 tbn, 1200 tbc (default)
    
    Metadata:
    
      rotate          : 90
    
      creation_time   : 2014-06-05 04:40:27
    
      handler_name    : Core Media Data Handler
    
      encoder         : H.264
    
    Side data:
    
      displaymatrix: rotation of -90.00 degrees
    
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-06-05 04:40:27
    
      handler_name    : Core Media Data Handler
    
[graph 0 input from stream 0:0 @ 0x27ed3a0] w:480 h:360 pixfmt:yuv420p tb:1/600 fr:320/11 sar:0/1 sws_param:flags=2
    
[graph 1 input from stream 0:1 @ 0x2800700] tb:1/44100 samplefmt:fltp samplerate:44100 chlayout:0x4
    
Output #0, avi, to '1.avi':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 0
    
    compatible_brands: qt  
    
    make-eng        : Apple
    
    model           : iPhone 5
    
    model-eng       : iPhone 5
    
    make            : Apple
    
    ISFT            : Lavf56.3.100
    
    ICRD            : 2014-06-04T21:40:27-0700
    
    date-eng        : 2014-06-04T21:40:27-0700
    
    Stream #0:0(und): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 480x360, q=2-31, 200 kb/s, 29.09 fps, 29.09 tbn, 29.09 tbc (default)
    
    Metadata:
    
      rotate          : 90
    
      creation_time   : 2014-06-05 04:40:27
    
      handler_name    : Core Media Data Handler
    
      encoder         : Lavc56.0.101 mpeg4
    
    Stream #0:1(und): Audio: mp3 (libmp3lame) (U[0][0][0] / 0x0055), 44100 Hz, mono, fltp (default)
    
    Metadata:
    
      creation_time   : 2014-06-05 04:40:27
    
      handler_name    : Core Media Data Handler
    
      encoder         : Lavc56.0.101 libmp3lame
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
    
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
    
Press [q] to stop, [?] for help
    
*** dropping frame 79 from stream 0 at ts 80
    
*** dropping frame 113 from stream 0 at ts 114
    
*** dropping frame 145 from stream 0 at ts 146
    
*** dropping frame 177 from stream 0 at ts 178
    
No more output streams to write to, finishing.
    
frame=  204 fps=0.0 q=27.2 Lsize=     348kB time=00:00:07.15 bitrate= 398.4kbits/s dup=0 drop=4    
    
video:271kB audio:56kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 6.560985%
    
Input file #0 (1.mov):
    
  Input stream #0:0 (video): 208 packets read (634624 bytes); 208 frames decoded; 
    
  Input stream #0:1 (audio): 308 packets read (56854 bytes); 308 frames decoded (315392 samples); 
    
  Total: 516 packets (691478 bytes) demuxed
    
Output file #0 (1.avi):
    
  Output stream #0:0 (video): 204 frames encoded; 204 packets muxed (276993 bytes); 
    
  Output stream #0:1 (audio): 274 frames encoded (315392 samples); 275 packets muxed (57469 bytes); 
    
  Total: 479 packets (334462 bytes) muxed

    strace and strace -e outputs :
    strace non root :

     579 clone(child_stack=0x7fd3bfd07ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|        CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7fd3bfd089d0, tls=0x7fd3bfd08700, child_tidptr=0x7fd3bfd089d0) = 3        2637
    
    580 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fd3bed07000
    
    581 mprotect(0x7fd3bed07000, 4096, PROT_NONE) = 0
    
    582 clone(child_stack=0x7fd3bf506ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|        CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7fd3bf5079d0, tls=0x7fd3bf507700, child_tidptr=0x7fd3bf5079d0) = -        1 EAGAIN (Resource temporarily unavailable)
    
    583 futex(0x253b420, FUTEX_WAKE_PRIVATE, 1) = 1
    
    584 futex(0x253b3f4, FUTEX_CMP_REQUEUE_PRIVATE, 1, 2147483647, 0x253b420, 4) = 2
    
    585 futex(0x253b420, FUTEX_WAKE_PRIVATE, 1) = 1
    
    586 futex(0x7fd3c2d0e9d0, FUTEX_WAIT, 32631, NULL) = 0
    
    587 munmap(0x7fd3bed07000, 8392704)         = 0
    
    588 munmap(0x7fd3c250e000, 8392704)         = 0
    
    589 munmap(0x7fd3c1d0d000, 8392704)         = 0
    
    590 munmap(0x7fd3c150c000, 8392704)         = 0
    
    591 write(2, "\33[1;32m[AVFilterGraph @ 0x253b0a"..., 39[AVFilterGraph @ 0x253b0a0] ) = 39
    
    592 write(2, "\33[1;31mError initializing thread"..., 41Error initializing threading.
    
    593 ) = 41
    
    594 write(2, "\33[1;32m[AVFilterGraph @ 0x253b0a"..., 39[AVFilterGraph @ 0x253b0a0] ) = 39
    
    595 write(2, "\33[1;31mError creating filter 'an"..., 41Error creating filter 'anull'
    
    596 ) = 41
    
    597 write(2, "\33[4;31mError opening filters!\n\33["..., 34Error opening filters!
    
    598 ) = 34

    strace -e non root :

    strace -e open ffmpeg -i 1.mov 5.avi
    
open("/etc/ld.so.cache", O_RDONLY)      = 3
    
open("/lib64/libasound.so.2", O_RDONLY) = 3
    
open("/usr/lib64/libSDL-1.2.so.0", O_RDONLY) = 3
    
open("/lib64/libpthread.so.0", O_RDONLY) = 3
    
open("/usr/lib64/libx264.so.142", O_RDONLY) = 3
    
open("/usr/lib64/libvpx.so.0", O_RDONLY) = 3
    
open("/usr/local/lib/libvorbisenc.so.2", O_RDONLY) = 3
    
open("/usr/local/lib/libvorbis.so.0", O_RDONLY) = 3
    
open("/usr/local/lib/libmp3lame.so.0", O_RDONLY) = 3
    
open("/lib64/libm.so.6", O_RDONLY)      = 3
    
open("/lib64/libbz2.so.1", O_RDONLY)    = 3
    
open("/usr/local/lib/libz.so.1", O_RDONLY) = 3
    
open("/lib64/librt.so.1", O_RDONLY)     = 3
    
open("/lib64/libc.so.6", O_RDONLY)      = 3
    
open("/lib64/libdl.so.2", O_RDONLY)     = 3
    
open("/usr/local/lib/libogg.so.0", O_RDONLY) = 3
    
ffmpeg version N-65949-g0ddb051 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Aug 28 2014 11:39:47 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)
    
  configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264
    
  libavutil      54.  7.100 / 54.  7.100
    
  libavcodec     56.  0.101 / 56.  0.101
    
  libavformat    56.  3.100 / 56.  3.100
    
  libavdevice    56.  0.100 / 56.  0.100
    
  libavfilter     5.  0.103 /  5.  0.103
    
  libswscale      3.  0.100 /  3.  0.100
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  0.100 / 53.  0.100
    
open("1.mov", O_RDONLY|O_CLOEXEC)       = 3
    
open("/etc/localtime", O_RDONLY)        = 4
    
open("/proc/meminfo", O_RDONLY|O_CLOEXEC) = 4
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mov':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 0
    
    compatible_brands: qt  
    
    creation_time   : 2014-06-05 04:40:27
    
    model           : iPhone 5
    
    model-eng       : iPhone 5
    
    encoder         : 7.1.1
    
    encoder-eng     : 7.1.1
    
    date            : 2014-06-04T21:40:27-0700
    
    date-eng        : 2014-06-04T21:40:27-0700
    
    make            : Apple
    
    make-eng        : Apple
    
  Duration: 00:00:07.15, start: 0.000023, bitrate: 781 kb/s
    
    Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 480x360, 710 kb/s, 29.09 fps, 600 tbr, 600 tbn, 1200 tbc (default)
    
    Metadata:
    
      rotate          : 90
    
      creation_time   : 2014-06-05 04:40:27
    
      handler_name    : Core Media Data Handler
    
      encoder         : H.264
    
    Side data:
    
      displaymatrix: rotation of -90.00 degrees
    
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-06-05 04:40:27
    
      handler_name    : Core Media Data Handler
    
open("5.avi", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = 4
    
[AVFilterGraph @ 0x26ff4a0] Error initializing threading.
    
[AVFilterGraph @ 0x26ff4a0] Error creating filter 'anull'
    
Error opening filters!

    strace root :

     579 clone(child_stack=0x7f4eb7c34ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|        CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb7c359d0, tls=0x7f4eb7c35700, child_tidptr=0x7f4eb7c359d0) = 3        383
    
    580 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb6c34000
    
    581 mprotect(0x7f4eb6c34000, 4096, PROT_NONE) = 0
    
    582 clone(child_stack=0x7f4eb7433ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|        CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb74349d0, tls=0x7f4eb7434700, child_tidptr=0x7f4eb74349d0) = 3        384
    
    583 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb6433000
    
    584 mprotect(0x7f4eb6433000, 4096, PROT_NONE) = 0
    
    585 clone(child_stack=0x7f4eb6c32ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|        CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb6c339d0, tls=0x7f4eb6c33700, child_tidptr=0x7f4eb6c339d0) = 3        385
    
    586 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb5c32000
    
    587 mprotect(0x7f4eb5c32000, 4096, PROT_NONE) = 0
    
    588 clone(child_stack=0x7f4eb6431ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|        CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb64329d0, tls=0x7f4eb6432700, child_tidptr=0x7f4eb64329d0) = 3        386
    
    589 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb5431000
    
    590 mprotect(0x7f4eb5431000, 4096, PROT_NONE) = 0
    
    591 clone(child_stack=0x7f4eb5c30ff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|        CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb5c319d0, tls=0x7f4eb5c31700, child_tidptr=0x7f4eb5c319d0) = 3        387
    
    592 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb4c30000
    
    593 mprotect(0x7f4eb4c30000, 4096, PROT_NONE) = 0
    
    594 clone(child_stack=0x7f4eb542fff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|        CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb54309d0, tls=0x7f4eb5430700, child_tidptr=0x7f4eb54309d0) = 3        388
    
    595 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb442f000
    
    596 mprotect(0x7f4eb442f000, 4096, PROT_NONE) = 0
    
    597 clone(child_stack=0x7f4eb4c2eff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|        CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f4eb4c2f9d0, tls=0x7f4eb4c2f700, child_tidptr=0x7f4eb4c2f9d0) = 3        389
    
    598 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4eb3c2e000

    strace -e root :

        strace -e open ffmpeg -i 1.mov 5.avi
    
    open("/etc/ld.so.cache", O_RDONLY)      = 3
    
    open("/lib64/libasound.so.2", O_RDONLY) = 3
    
    open("/usr/lib64/libSDL-1.2.so.0", O_RDONLY) = 3
    
    open("/lib64/libpthread.so.0", O_RDONLY) = 3
    
    open("/usr/lib64/libx264.so.142", O_RDONLY) = 3
    
    open("/usr/lib64/libvpx.so.0", O_RDONLY) = 3
    
    open("/usr/local/lib/libvorbisenc.so.2", O_RDONLY) = 3
    
    open("/usr/local/lib/libvorbis.so.0", O_RDONLY) = 3
    
    open("/usr/local/lib/libmp3lame.so.0", O_RDONLY) = 3
    
    open("/lib64/libm.so.6", O_RDONLY)      = 3
    
    open("/lib64/libbz2.so.1", O_RDONLY)    = 3
    
    open("/usr/local/lib/libz.so.1", O_RDONLY) = 3
    
    open("/lib64/librt.so.1", O_RDONLY)     = 3
    
    open("/lib64/libc.so.6", O_RDONLY)      = 3
    
    open("/lib64/libdl.so.2", O_RDONLY)     = 3
    
    open("/usr/local/lib/libogg.so.0", O_RDONLY) = 3
    
    ffmpeg version N-65957-gc6a3b00 Copyright (c) 2000-2014 the FFmpeg developers
    
      built on Aug 28 2014 13:37:32 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4)
    
      configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264 --prefix=/usr --libdir=/usr/lib64 --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264
    
      libavutil      54.  7.100 / 54.  7.100
    
      libavcodec     56.  0.101 / 56.  0.101
    
      libavformat    56.  3.100 / 56.  3.100
    
      libavdevice    56.  0.100 / 56.  0.100
    
      libavfilter     5.  0.103 /  5.  0.103
    
      libswscale      3.  0.100 /  3.  0.100
    
      libswresample   1.  1.100 /  1.  1.100
    
      libpostproc    53.  0.100 / 53.  0.100
    
    open("1.mov", O_RDONLY|O_CLOEXEC)       = 3
    
    open("/etc/localtime", O_RDONLY)        = 4
    
    open("/proc/meminfo", O_RDONLY|O_CLOEXEC) = 4
    
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mov':
    
      Metadata:
    
        major_brand     : qt  
    
        minor_version   : 0
    
        compatible_brands: qt  
    
        creation_time   : 2014-06-05 04:40:27
    
        model           : iPhone 5
    
        model-eng       : iPhone 5
    
        encoder         : 7.1.1
    
        encoder-eng     : 7.1.1
    
        date            : 2014-06-04T21:40:27-0700
    
        date-eng        : 2014-06-04T21:40:27-0700
    
        make            : Apple
    
        make-eng        : Apple
    
      Duration: 00:00:07.15, start: 0.000023, bitrate: 781 kb/s
    
        Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 480x360, 710 kb/s, 29.09 fps, 600 tbr, 600 tbn, 1200 tbc (default)
    
        Metadata:
    
          rotate          : 90
    
          creation_time   : 2014-06-05 04:40:27
    
          handler_name    : Core Media Data Handler
    
          encoder         : H.264
    
        Side data:
    
          displaymatrix: rotation of -90.00 degrees
    
        Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
    
        Metadata:
    
          creation_time   : 2014-06-05 04:40:27
    
          handler_name    : Core Media Data Handler
    
    File '5.avi' already exists. Overwrite ? [y/N] y
    
    open("5.avi", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = 4
    
    Output #0, avi, to '5.avi':
    
      Metadata:
    
        major_brand     : qt  
    
        minor_version   : 0
    
        compatible_brands: qt  
    
        make-eng        : Apple
    
        model           : iPhone 5
    
        model-eng       : iPhone 5
    
        make            : Apple
    
        ISFT            : Lavf56.3.100
    
        ICRD            : 2014-06-04T21:40:27-0700
    
        date-eng        : 2014-06-04T21:40:27-0700
    
        Stream #0:0(und): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 480x360, q=2-31, 200 kb/s, 29.09 fps, 29.09 tbn, 29.09 tbc (default)
    
        Metadata:
    
          rotate          : 90
    
          creation_time   : 2014-06-05 04:40:27
    
          handler_name    : Core Media Data Handler
    
          encoder         : Lavc56.0.101 mpeg4
    
        Stream #0:1(und): Audio: mp3 (libmp3lame) (U[0][0][0] / 0x0055), 44100 Hz, mono, fltp (default)
    
        Metadata:
    
          creation_time   : 2014-06-05 04:40:27
    
          handler_name    : Core Media Data Handler
    
          encoder         : Lavc56.0.101 libmp3lame
    
    Stream mapping:
    
      Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
    
      Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
    
    Press [q] to stop, [?] for help
    
    frame=  204 fps=0.0 q=27.2 Lsize=     348kB time=00:00:07.15 bitrate= 398.4kbits/s dup=0 drop=4    
    
    video:271kB audio:56kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 6.560985%

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