Recherche avancée

Médias (0)

Mot : - Tags -/diogene

Aucun média correspondant à vos critères n’est disponible sur le site.

Autres articles (59)

  • Personnaliser en ajoutant son logo, sa bannière ou son image de fond

    5 septembre 2013, par

    Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

Sur d’autres sites (7411)

  • Fast Video Streaming and Upload Android

    6 avril 2016, par vminind

    Fast Streaming & Uploading Videos On Mobile Apps with AWS S3

    Im developing a app witch has Android, iOS Clients were users can upload videos and photos and view as news feed. I store my video file on Amazone s3. Video length is limited to 30sec.

    When user is uploading 30 sec video from their gallery there are some high quality videos witch is even exceed 100MB so those video files take ages to upload. So i tried to convert them before upload using ffmpeg-android library but it also take almost same amount of time to convert the file so it seems this solution also point less. (convert in the scene reducing the video resolution and frame rate)

    Im using ExoPlayer to play videos

    Note : Videos uploading from iOS are not that huge files.

    I want videos to upload fast and stream fast. Its big help if anyone can share their thoughts on this.

  • ffmpeg recognises MXF dv but won't encode to h264

    6 août 2017, par 3pointedit

    I have a DV file encoded as an MXF that I want to transcode to h264. Running ffmpeg against the file it reads ok and understands the stream but won’t write the h264 file. It seems to get all the streams correct and I can confirm the attributes of video and audio streams.

    I just don’t understand why it won’t encode ? I tried to force a Decoder with -f dv but it complained that the source header was incorrect.

     ./ffmpeg -f dv -i camb_onitefire_050914.mov  camb_onitefire_A.mp4
    
ffmpeg version 3.3.1 Copyright (c) 2000-2017 the FFmpeg developers
    
  built 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 --enable-libvidstab --enable-libx265 --disable-doc --arch=x86_64 --enable-runtime-cpudetect
    
  libavutil      55. 58.100 / 55. 58.100
    
  libavcodec     57. 89.100 / 57. 89.100
    
  libavformat    57. 71.100 / 57. 71.100
    
  libavdevice    57.  6.100 / 57.  6.100
    
  libavfilter     6. 82.100 /  6. 82.100
    
  libswscale      4.  6.100 /  4.  6.100
    
  libswresample   2.  7.100 /  2.  7.100
    
  libpostproc    54.  5.100 / 54.  5.100
    
[dv @ 0x7fd6f4800000] Cannot find DV header.
    
camb_onitefire_050914.mov: Operation not permitted
    
Davids-MacBook-Pro:camb_onitefire_050914(1).vmf davidmcsween$ ./ffmpeg -i camb_onitefire_050914.mov camb_onitefire_A.mp4
    
ffmpeg version 3.3.1 Copyright (c) 2000-2017 the FFmpeg developers
    
  built 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 --enable-libvidstab --enable-libx265 --disable-doc --arch=x86_64 --enable-runtime-cpudetect
    
  libavutil      55. 58.100 / 55. 58.100
    
  libavcodec     57. 89.100 / 57. 89.100
    
  libavformat    57. 71.100 / 57. 71.100
    
  libavdevice    57.  6.100 / 57.  6.100
    
  libavfilter     6. 82.100 /  6. 82.100
    
  libswscale      4.  6.100 /  4.  6.100
    
  libswresample   2.  7.100 /  2.  7.100
    
  libpostproc    54.  5.100 / 54.  5.100
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 0, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/video.vid', dir='camb_onitefire_050914(1).vmf', filename='video.vid', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 1, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/audio_0.pcm', dir='camb_onitefire_050914(1).vmf', filename='audio_0.pcm', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 2, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/audio_1.pcm', dir='camb_onitefire_050914(1).vmf', filename='audio_1.pcm', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 3, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/audio_2.pcm', dir='camb_onitefire_050914(1).vmf', filename='audio_2.pcm', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 4, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/audio_3.pcm', dir='camb_onitefire_050914(1).vmf', filename='audio_3.pcm', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Could not find codec parameters for stream 0 (Video: dvvideo (dvpp / 0x70707664), none, 720x576, 28800 kb/s): unspecified pixel format
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
Guessed Channel Layout for Input Stream #0.1 : mono
    
Guessed Channel Layout for Input Stream #0.2 : mono
    
Guessed Channel Layout for Input Stream #0.3 : mono
    
Guessed Channel Layout for Input Stream #0.4 : mono
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'camb_onitefire_050914.mov':
    
  Metadata:
    
    creation_time   : 2014-09-04T18:54:07.000000Z
    
  Duration: 00:17:47.18, start: 0.000000, bitrate: 1 kb/s
    
    Stream #0:0(eng): Video: dvvideo (dvpp / 0x70707664), none, 720x576, 28800 kb/s, SAR 118:81 DAR 295:162, 25 fps, 25 tbr, 2500 tbn, 2500 tbc (default)
    
    Metadata:
    
      creation_time   : 2014-09-04T18:54:07.000000Z
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 01:46:43:02
    
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-09-04T18:54:07.000000Z
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:2(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-09-04T18:54:07.000000Z
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:3(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-09-04T18:54:07.000000Z
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:4(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-09-04T18:54:07.000000Z
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:5(eng): Data: none (tmcd / 0x64636D74) (default)
    
    Metadata:
    
      creation_time   : 2014-09-04T18:54:07.000000Z
    
      handler_name    : Apple Handle Data Handler
    
      timecode        : 01:46:43:02
    
File 'camb_onitefire_A.mp4' already exists. Overwrite ? [y/N] y
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (dvvideo (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
Finishing stream 0:0 without any data written to it.
    
Finishing stream 0:1 without any data written to it.
    
Nothing was written into output file 0 (camb_onitefire_A.mp4), because at least one of its streams received no packets.
    
frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A    
    
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
    
[aac @ 0x7fe1fd010e00] Qavg: nan

    Heres an example of the file structure of this novel mxd :

    mxf example

  • use OpenCV to capture a good frame of faces from IP camera [on hold]

    17 octobre 2018, par wiwengweng

    everyone. I am working on some research about getting frames from IP camera, and then detect and recognize faces. There is some implements on the last two steps. And my first problem is to judge if a frame with faces is good enough for detection. Video stream is read by OpenCV and/or ffmpeg, and there are many ways to capture frames one by one.

    As we know, people are always walking through, so frames captured from IP camera is not always good. But the good news is the if we extract the frames from the IP camera video file, we find some frames good enough for detection.

    is it possible to analyse by using the opencv CascadeClassifier to detect if the face is clear or not ? Right now I just use minSize and maxSize to capture the face, however I cannot judge if it is clear.

    I also try de-blurring pictures of frames using GAN, but that will need more time, so I think that is not an ideal way. So any advice is welcome.

Navigation