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  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • Formulaire personnalisable

    21 juin 2013, par

    Cette page présente les champs disponibles dans le formulaire de publication d’un média et il indique les différents champs qu’on peut ajouter. Formulaire de création d’un Media
    Dans le cas d’un document de type média, les champs proposés par défaut sont : Texte Activer/Désactiver le forum ( on peut désactiver l’invite au commentaire pour chaque article ) Licence Ajout/suppression d’auteurs Tags
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire. (...)

  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 est la première version de MediaSPIP stable.
    Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
    Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)

Sur d’autres sites (10355)

  • ffmpeg export multichannel audio -map

    8 avril 2014, par speedyrazor

    I am trying to export all audio channels from a multichannel quicktime file with ffmpeg which has the following audio configuration, but am unsure if the command below is correct. All the files look and play correct in Quicktime player except the L+R_Total.wav which refuses to play in Quicktime player but plays fine in VLC, so not sure if i'm using the wrong command :

    Track 1 - mono
    
Track 2 - mono
    
Track 3 - mono
    
Track 4 - mono
    
Track 5 - mono
    
Track 6 - mono
    
Track 7 - stereo

    I am using :

    /Users/me/Desktop/python/ffmpeg/ffmpeg -i /Users/me/Desktop/test.mov -acodec pcm_s24le -map 0:1 -y Left.wav -acodec pcm_s24le -map 0:2 Right.wav -acodec pcm_s24le -map 0:3 Center.wav -acodec pcm_s24le -map 0:4 LFE.wav -acodec pcm_s24le -map 0:5 Left_Surround.wav -acodec pcm_s24le -map 0:6 Right_Surround.wav -acodec pcm_s24le -map 0:7 Left+Right_Total.wav

    Here is the printout from the terminal :

        MacBook-Pro:~ me$ /Users/me/Desktop/python/ffmpeg/ffmpeg -i /Users/me/Desktop/test.mov -acodec pcm_s24le -map 0:1 -y Left.wav -acodec pcm_s24le -map 0:2 Right.wav -acodec pcm_s24le -map 0:3 Center.wav -acodec pcm_s24le -map 0:4 LFE.wav -acodec pcm_s24le -map 0:5 Left_Surround.wav -acodec pcm_s24le -map 0:6 Right_Surround.wav -acodec pcm_s24le -map 0:7 Left+Right_Total.wav
    
ffmpeg version 2.2 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Mar 25 2014 15:00:55 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
    
  configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --arch=x86_64 --enable-runtime-cpudetect
    
  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
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/me/Desktop/test.mov':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    creation_time   : 2014-03-06 11:25:34
    
  Duration: 00:01:03.48, start: 0.000000, bitrate: 153967 kb/s
    
    Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le, 1920x1080, 144704 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 23976 tbn, 23976 tbc (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:00:00:00
    
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FL), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FR), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:4(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (LFE), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:5(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BL), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:6(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BR), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:7(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, downmix, s32, 2304 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:8(eng): Data: none (tmcd / 0x64636D74) (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:26:04
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 00:00:00:00
    
Output #0, wav, to 'Left.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #0:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (FL), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #1, wav, to 'Right.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #1:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (FR), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #2, wav, to 'Center.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #2:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, mono, s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #3, wav, to 'LFE.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #3:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (LFE), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #4, wav, to 'Left_Surround.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #4:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (BL), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #5, wav, to 'Right_Surround.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #5:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (BR), s32, 1152 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Output #6, wav, to 'Left+Right_Total.wav':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    ISFT            : Lavf55.33.100
    
    Stream #6:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, downmix, s32, 2304 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-06 11:25:34
    
      handler_name    : Apple Alias Data Handler
    
Stream mapping:
    
  Stream #0:1 -> #0:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:2 -> #1:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:3 -> #2:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:4 -> #3:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:5 -> #4:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:6 -> #5:0 (pcm_s24le -> pcm_s24le)
    
  Stream #0:7 -> #6:0 (pcm_s24le -> pcm_s24le)
    
Press [q] to stop, [?] for help
    
size=    8927kB time=00:01:03.48 bitrate=1152.0kbits/s    
    
video:0kB audio:71415kB subtitle:0 data:0 global headers:0kB muxing overhead -87.499863%

  • How to generate pcm audio file by setting 20 bit depth ?

    6 juillet 2015, par vip007

    No option using ffmpeg

    I am using ffmpeg to generate audio data. I am using following command

    ffmpeg.exe -i in.wav -ar 44100  -acodec pcm_s16le  -ac 1 out.wav

    but there is no option to convert to 20 bit depth pcm audio. (something like pcm_s20le).

    I want to perform some operations on apple codec (e.g. encoding pcm audio data to alac).

    On ALAC source : http://alac.macosforge.org/trac/browser/trunk/ReadMe.txt , it has been mentioned like this ;

    Apple Lossless supports the following features
    1. Bit depths 16, 20, 24 and 32 bits.

    Media Foundation on windows throwing exception for 20 bit depth

    I tried sample encoding and transcoding application mentioned on MSDN https://code.msdn.microsoft.com/windowsapps/media-transcode-sample-f7ba5269

    with following configuration but it failed

    spTypeOut->SetUINT32(MF_MT_AUDIO_BITS_PER_SAMPLE, 20);  

    NOTE : but i put 16 instead of 20 ; it created smoothly.

    Is there any way to generate such 20 bit PCM audio ? What is so special about 20 bit depth that it is not being considered on ffmpeg and media foundation but on apple codec ?

  • ffmpeg messing up audio when copying PCM streams

    2 juin 2022, par lioumens

    I'm using ffmpeg to compress videos, but when trying to copy the audio stream from one video file using the same codec and container, the audio is completely corrupted and unusable.

    


    The video I'm trying to compress has stream data :

    


    $ ffprobe -hide_banner -i testing.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'testing.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    creation_time   : 2019-04-25T05:37:35.000000Z
    com.apple.quicktime.make: Apple
    com.apple.quicktime.model: MacBookPro15,2
    com.apple.quicktime.software: Mac OS X 10.14.2 (18C54)
    com.apple.quicktime.creationdate: 2019-04-25T00:28:40-0500
  Duration: 00:06:35.75, start: 0.000000, bitrate: 66117 kb/s
  Stream #0:0[0x1](und): Video: prores (Standard) (apcn / 0x6E637061), yuv422p10le(tv, smpte170m/bt709/bt709, progressive), 1280x720, 65923 kb/s, 29.01 fps, 29.01 tbr, 30k tbn (default)
    Metadata:
      creation_time   : 2019-04-25T05:37:35.000000Z
      handler_name    : Core Media Video
      vendor_id       : appl
      encoder         : Apple ProRes 422
  Stream #0:1[0x2](und): Audio: pcm_s16be (lpcm / 0x6D63706C), 8000 Hz, 1 channels, s16, 128 kb/s (default)
    Metadata:
      creation_time   : 2019-04-25T05:37:35.000000Z
      handler_name    : Core Media Audio
      vendor_id       : [0][0][0][0]


    


    Just working with the audio, I tried to copy the audio into a separate file with ffmpeg -i testing.mov -vn -channel_layout mono -c:a copy tmp.mov, which results in a video file with stream data :

    


    $ ffprobe -hide_banner -i tmp.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'tmp.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf59.16.100
  Duration: 00:06:35.26, start: 0.018000, bitrate: 128 kb/s
  Stream #0:0[0x1]: Audio: pcm_s16be (twos / 0x736F7774), 8000 Hz, mono, s16, 128 kb/s (default)
    Metadata:
      handler_name    : Core Media Audio
      vendor_id       : [0][0][0][0]


    


    It seems the only difference when copying the audio is the original says pcm_s16be (lpcm / 0x6D63706C) while the resulting audio has pcm_s16be (twos / 0x736F7774). My understanding is that twos is Apple Quicktime's FOURCC identifier for signed 16 bit big-endian., which is correct and shouldn't affect the audio.

    


    It seems another forum user had a similar issue, but they were using a hex editor to directly manipulate bits, which I'm not comfortable doing. Is there a fix from within ffmpeg ?

    


    EDIT :
I've uploaded a sample of the clip that has this problem.

    


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