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  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • La file d’attente de SPIPmotion

    28 novembre 2010, par

    Une file d’attente stockée dans la base de donnée
    Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
    Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...)

  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

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  • Grayscale streaming from raw video using FFMPEG

    21 janvier 2015, par user1657208

    I have a raw video file (testvideo_1000f.raw) that I am trying to stream in gray scale using ffmpeg and output the grayscale video to output.swf. The command I am using to do this is :

    ffmpeg/ffmpeg -qmin 2 -qmax 31 -s 320x240 -f rawvideo -flags gray -pix_fmt:output gray -an -i testvideo_1000f.raw output.swf

    However, the result from this command is a video stream that is in gray scale but still contains some of the chrominance data. The output from this command is pasted below :

        3 [volta]/home/student/elliott> ffmpeg/ffmpeg -qmin 2 -qmax 31 -s 320x240 -f rawvideo -flags gray -pix_fmt:output gray -an -i testvideo_1000f.raw output.swf
    
ffmpeg version N-41632-g2b1fc56 Copyright (c) 2000-2012 the FFmpeg developers
    
  built on Jul 29 2012 10:27:26 with gcc 4.1.2 20080704 (Red Hat 4.1.2-51)
    
  configuration: 
    
  libavutil      51. 58.100 / 51. 58.100
    
  libavcodec     54. 25.100 / 54. 25.100
    
  libavformat    54.  6.101 / 54.  6.101
    
  libavdevice    54.  0.100 / 54.  0.100
    
  libavfilter     2. 80.100 /  2. 80.100
    
  libswscale      2.  1.100 /  2.  1.100
    
  libswresample   0. 15.100 /  0. 15.100
    
*** CHOOSING 8
    
[rawvideo @ 0xdda9660] Estimating duration from bitrate, this may be inaccurate
    
Input #0, rawvideo, from 'testvideo_1000f.raw':
    
  Duration: N/A, start: 0.000000, bitrate: N/A
    
   Stream #0:0: Video: rawvideo (Y800 / 0x30303859), gray, 320x240, 25 tbr, 25 tbn, 25 tbc
    
File 'output.swf' already exists. Overwrite ? [y/N] y
    
w:320 h:240 pixfmt:gray tb:1/25 fr:25/1 sar:0/1 sws_param:flags=2
    
[ffmpeg_buffersink @ 0xddb7b40] No opaque field provided
    
[format @ 0xddb7d40] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed_null_0' and the filter 'format'
    
[auto-inserted scaler 0 @ 0xddb7920] w:320 h:240 fmt:gray sar:0/1 -> w:320 h:240 fmt:yuv420p sar:0/1 flags:0x4
    
*** CHOOSING 8
    
Output #0, swf, to 'output.swf':
    
  Metadata:
    
    encoder         : Lavf54.6.101
    
   Stream #0:0: Video: flv1, yuv420p, 320x240, q=2-31, 200 kb/s, 90k tbn, 25 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo -> flv)
    
Press [q] to stop, [?] for help
    
Truncating packet of size 76800 to 1 2875kB time=00:00:40.84 bitrate= 576.7kbits/s    
    
frame= 1500 fps=1035 q=24.8 Lsize=    4194kB time=00:01:00.00 bitrate= 572.6kbits/s    
    
video:4166kB audio:0kB global headers:0kB muxing overhead 0.669245%

    I am fairly new to FFMPEG and I am afraid I am using either the wrong syntax or the wrong parameters in my command line. For some reason, the format of the output is yuv420p. I have tried searching for this answer all over but have had no luck. Could anyone please help me and tell me why the output is being formatted in yuv420p when I am giving the command for it to be in 8bit grayscale ? Any help would be greatly appreciated. Thank you.

    Marc Elliott

  • "File descriptor in bad state" error while running ffmpeg on android device and selecting an input device

    25 août 2012, par user1545779

    Below is the output of the ffmpeg command :# ./ffmpeg -y -f s16le -i /dev/snd/pcmC3D0c 1640.wmv -to create an audio file from a Logitech webcam on an android device.

    As shown in the output, I received a File descriptor in bad state error for referring to the mic input as /dev/snd/pcmC3D0c I determined the value of the device (webcam mic) by reviewing the contents of /proc/asound. The webcam mic was card3 and its STREAM0 file indicated that the mic has an audio format of format S16_LE

    It was also confirmed that it is a capture device and its' pcm id was pcmC3D0c (C3 being the card number and D0 being the Device number. I then confirmed the correct device by checking the /dev/snd/ directory to confirm its proper and full description. The /dev/snd folder confirmed that the mic was /dev/snd/pcmC3D0c

    I then checked the permissions and ownership to make sure that I could use that device. Hence as far as identifying the correct device to used I do believe that /dev/snd/pcmC3D0c is the correct device. I do believe this error could possibly have something to do with the OS, however after all these checks, I still cannot figure out what is giving the bad file descriptor state error.

    Please note that I tested for different output formats, etc and that did not make any difference. Any leads or suggestions ?

    # ./ffmpeg -y -f s16le -i /dev/snd/pcmC3D0c 1640.wmv

    ffmpeg version N-43170-gd84dd35 Copyright (c) 2000-2012 the FFmpeg developers
    built on Aug 24 2012 09:16:05 with gcc 4.4.3 (GCC) configuration : —enable-cross-compile —arch=arm —cpu=cortex-a9 —target-os=linux —enable-runtime-cpudetect —prefix=/output —enable-pic —cross-prefix=/home/jasongipsyblues/Desktop/apps/android-ndk-r8b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi- —sysroot=/home/jasongipsyblues/Desktop/apps/android-ndk-r8b/platforms/android-14/arch-arm —enable-version3 —enable-gpl —enable-memalign-hack —disable-doc —enable-yasm —enable-libx264 —enable-zlib —extra-cflags=-I../x264 —extra-ldflags='-L../x264 -lc'

    libavutil 51. 66.100 / 51. 66.100
    libavcodec 54. 48.100 / 54. 48.100
    libavformat 54. 22.100 / 54. 22.100
    libavdevice 54. 2.100 / 54. 2.100
    libavfilter 3. 5.102 / 3. 5.102
    libswscale 2. 1.100 / 2. 1.100
    libswresample 0. 15.100 / 0. 15.100
    libpostproc 52. 0.100 / 52. 0.100

    [s16le @ 0xfd84f0] Invalid sample rate 0 specified using default of 44100
    [s16le @ 0xfd84f0] Estimating duration from bitrate, this may be inaccurate
    Guessed Channel Layout for Input Stream #0.0 : mono
    Input #0, s16le, from '/dev/snd/pcmC3D0c' :
    Duration : N/A, bitrate : 705 kb/s
    Stream #0:0 : Audio : pcm_s16le, 44100 Hz, mono, s16, 705 kb/s
    Output #0, asf, to '1640.wmv' :
    Metadata :
    WM/EncodingSettings : Lavf54.22.100
    Stream #0:0 : Audio : wmav2 (a[1][0][0] / 0x0161), 44100 Hz, mono, s16, 128 kb/s
    Stream mapping :
    Stream #0:0 -> #0:0 (pcm_s16le -> wmav2)
    Press [q] to stop, [?] for help

    /dev/snd/pcmC3D0c : File descriptor in bad state
    size= 1kB time=00:00:00.00 bitrate= 0.0kbits/s
    video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead 5340.000000%

  • How to tell if ffmpeg errored or not ?

    12 juin 2015, par dvdmn

    The Situation :
    I’m using ffmpeg (via .net) to save video files. I can get the output from ffmpeg but I dont know how can I customize the output to have better result.

    My Problem :
    My problem is, there is no certain difference between successful and failed operation.

    last line of success :

    video:1006kB audio:134kB subtitle:0 global headers:0kB muxing overhead 0.943510%

    last lines from fails

    c :\x\test-9-8/30/2012-9:29:56-AM.mp4 : Invalid argument

    rtmp ://cdn.tv/cdn-live39/definst/stream01 : Unknown error occurred

    My Question :
    Is there an option (or command line parameter) to add some sort of return code (200 : success, 500 : error, etc)

    Thanks !

    PS : I saw this topic How to tell if ffmpeg errored ? but there is no number before/after last line. I think the last version doesnt have number anymore.

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