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  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

Sur d’autres sites (9425)

  • how to rapidly extract intraframe from a video (in c++ or python)

    11 novembre 2013, par Thomas Anderson

    i want to capture some frame from a video so i used command like this :

    ffmpeg -i MyVideo.mp4 -ss 1:20:12 -vframes 1 test-pic.jpg

    but ffmpeg proccess frame from begin of video so this command is too slow. i research and i found some article about keyframe so i try to extract keyframe by a command like this

    ffmpeg -vf select="eq(pict_type\,PICT_TYPE_I)" -i MyVideo.mp4 -vsync 2 -s 160x90 -f image2 thumbnails-%02d.jpeg

    but this command also is to slow and capture too many frame.
    I need a linux command or c++ or python code to capture a frame that dont take long time

  • azap from LinuxTV dvb-apps strange signal behavior with Hauppauge WinTV-HVR 950Q [migrated]

    27 février 2012, par mmoment

    What I want to do

    I have a Hauppauge WinTV-HVR 950Q USB-TV-Stick. I want to use this stick to successively tune to and read in a certain live TV stream.

    What I do

    I trigger a scan and save the scan results in a file. I call it channels.conf, like the v4l documentary proposes.

    scan /home/username/Documents/dvb/atsc/us-CA-SF-Bay-Area > /home/username/Documents/dvb/atsc/conf/home_channels.conf

    Everything works fine, the scan returns something like this(A correct channel file) :

    [0003]:503000000:8VSB:49:52:3
    
[0005]:503000000:8VSB:81:84:5
    
[0006]:503000000:8VSB:97:100:6
    
26 San Francisco, CA:551000000:8VSB:49:52:3
    
26 San Francisco, CA:551000000:8VSB:65:68:4
    
KTSF-D3:551000000:8VSB:81:84:5
    
KTSF-D4:551000000:8VSB:97:100:6
    
KTSF-D5:551000000:8VSB:113:116:7
    
KTSF-D6:551000000:8VSB:129:132:8
    
KPIX-DT:563000000:8VSB:49:52:1
    
KKPX ION:635000000:8VSB:49:52:3
    
KKPX qubo:635000000:8VSB:65:68:4
    
IONLife:635000000:8VSB:81:84:5
    
100:635000000:8VSB:487:488:100
    
200:635000000:8VSB:417:418:200
    
201:635000000:8VSB:422:423:201
    
202:635000000:8VSB:427:428:202
    
203:635000000:8VSB:432:433:203
    
204:635000000:8VSB:412:413:204
    
300:635000000:8VSB:442:443:300
    
400:635000000:8VSB:457:458:400
    
KSTS-HD:683000000:8VSB:49:52:3
    
Telemundo Exitos TV:683000000:8VSB:65:68:4
    
CNL-SOI:683000000:8VSB:81:84:5
    
KQEH:689000000:8VSB:49:52:1
    
KQED:689000000:8VSB:65:68:2
    
LIFE:689000000:8VSB:81:84:3
    
KIDS:689000000:8VSB:97:100:4
    
V-me:689000000:8VSB:113:116:5

    Then I tune to a channel from the scan results. KIDS for example :

    azap -r -c Documents/dvb/atsc/conf/channels.conf KIDS

    What I expect the program to do :

    I expect the program to be tuned and to deliver results similar to this :

    username@username:~$ azap -r -c Documents/dvb/atsc/conf/channels.conf KIDS
    
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
    
tuning to 689000000 Hz
    
video pid 0x0061, audio pid 0x0064
    

    
status 1f | signal 00e6 | snr 00e6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 1f | signal 00e6 | snr 00e6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 1f | signal 00e6 | snr 00e6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 1f | signal 00dc | snr 00e6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 1f | signal 00e6 | snr 00e6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 1f | signal 00e6 | snr 00e6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
...

    What it does :

    In 2 out of 5 tries the azap just doesn't work at all.

    username@username:~$ azap -r -c Documents/dvb/atsc/conf/channels.conf KIDS
    
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
    
tuning to 689000000 Hz
    
video pid 0x0061, audio pid 0x0064
    

    
status 00 | signal 0000 | snr 00e6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 0000 | snr 00e4 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 0000 | snr 00e6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 0000 | snr 00c2 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 0000 | snr 00e6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
...

    The rest of the time it generally works initially, then switches the status to 00 and can not be used any more, even if there is incoming signal.

    status 1f | signal 00dc | snr 00dc | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 1f | signal 00d2 | snr 00dc | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 1f | signal 00dc | snr 00dc | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 1f | signal 00dc | snr 00dc | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 1f | signal 00d2 | snr 00d2 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 1f | signal 00c8 | snr 00d2 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 1f | signal 00d2 | snr 00d2 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 00d2 | snr 00d2 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 00d2 | snr 00d2 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 00d2 | snr 00d2 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 00dc | snr 00dc | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 00e6 | snr 00e6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 00dc | snr 00dc | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 00e6 | snr 00e6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 00e6 | snr 00e6 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
status 00 | signal 00e6 | snr 00dc | ber 00000000 | unc 00000000 | FE_HAS_LOCK
    
...

    The output even shows that there is high signal to noise ratio, low or rather no block errors or uncorrected errors at all at first, then it
    This keeps me wondering since I see no reason for the program to switch. After double checking with a real TV I am very sure that I always have an incoming signal and that there should not be any reasons for a behavior like this.

    Question

    Can any of you guys see a reason for this behavior, could it be a problem with the Hardware that I'm using or rather a Software issue ? Did anybody experience the same issues, how did you fix it ? Any help is greatly appreciated !

  • doc/ffserver : remove "What can this do ?" section

    28 novembre 2013, par Stefano Sabatini
    doc/ffserver : remove "What can this do ?" section

    The section shows only a limited use case, contains only redundant
    
information, and various mysterious mentions about things which don’t
    
work correctly.
    • [DH] doc/ffserver.texi

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