Recherche avancée

Médias (1)

Mot : - Tags -/Christian Nold

Autres articles (77)

  • Organiser par catégorie

    17 mai 2013, par

    Dans MédiaSPIP, une rubrique a 2 noms : catégorie et rubrique.
    Les différents documents stockés dans MédiaSPIP peuvent être rangés dans différentes catégories. On peut créer une catégorie en cliquant sur "publier une catégorie" dans le menu publier en haut à droite ( après authentification ). Une catégorie peut être rangée dans une autre catégorie aussi ce qui fait qu’on peut construire une arborescence de catégories.
    Lors de la publication prochaine d’un document, la nouvelle catégorie créée sera proposée (...)

  • Récupération d’informations sur le site maître à l’installation d’une instance

    26 novembre 2010, par

    Utilité
    Sur le site principal, une instance de mutualisation est définie par plusieurs choses : Les données dans la table spip_mutus ; Son logo ; Son auteur principal (id_admin dans la table spip_mutus correspondant à un id_auteur de la table spip_auteurs)qui sera le seul à pouvoir créer définitivement l’instance de mutualisation ;
    Il peut donc être tout à fait judicieux de vouloir récupérer certaines de ces informations afin de compléter l’installation d’une instance pour, par exemple : récupérer le (...)

  • 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 (4699)

  • Change AVI creation date with ffmpeg ?

    1er novembre 2016, par brock

    As far as I can tell the following ffmpeg command should copy all existing metadata in the input file to the output file and modify the specified field in the output file :

    ffmpeg -i VID_20130502_220104.avi -metadata creation_time="2013-05-02 22:01:04" -codec copy VID_20130502_220104-2.avi

    Instead, it seems to strip all metadata from the output file. Here is the output of a few commands. I am going nuts. I think this should work, but why is it not ?

    Command to edit the creation time :

    ffmpeg -i VID_20130502_220104.avi -metadata creation_time="2013-05-02 22:01:04" -codec copy VID_20130502_220104-2.avi
    

    
ffmpeg version 3.1.5 Copyright (c) 2000-2016 the FFmpeg developers
    
  built with gcc 5.4.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
    
  libavutil      55. 28.100 / 55. 28.100
    
  libavcodec     57. 48.101 / 57. 48.101
    
  libavformat    57. 41.100 / 57. 41.100
    
  libavdevice    57.  0.101 / 57.  0.101
    
  libavfilter     6. 47.100 /  6. 47.100
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  1.100 /  2.  1.100
    
  libpostproc    54.  0.100 / 54.  0.100
    
Guessed Channel Layout for Input Stream #0.1 : mono
    
Input #0, avi, from 'VID_20130502_220104.avi':
    
  Metadata:
    
    encoder         : 
    
    maker           : NIKON
    
    model           : COOLPIX S4300
    
    creation_time   : 2011-01-01 00:00:00
    
  Duration: 00:01:30.50, start: 0.000000, bitrate: 32135 kb/s
    
    Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 31782 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc
    
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s
    
[avi @ 000000000032ad40] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
    
    Last message repeated 1 times
    
Output #0, avi, to 'VID_20130502_220104-2.avi':
    
  Metadata:
    
    creation_time   : 2013-05-02 22:01:04
    
    maker           : NIKON
    
    model           : COOLPIX S4300
    
    ISFT            : Lavf57.41.100
    
    Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, q=2-31, 31782 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc
    
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, mono, 352 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
frame=  891 fps=0.0 q=-1.0 size=  116171kB time=00:00:29.69 bitrate=32043.1kbits/s speed=59.4x    
    
frame= 1739 fps=1739 q=-1.0 size=  227191kB time=00:00:57.96 bitrate=32107.5kbits/s speed=  58x    
    
frame= 2609 fps=1739 q=-1.0 size=  340940kB time=00:01:26.96 bitrate=32115.9kbits/s speed=  58x    
    
frame= 2715 fps=1734 q=-1.0 Lsize=  355018kB time=00:01:30.49 bitrate=32136.3kbits/s speed=57.8x    
    
video:350984kB audio:3897kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.038597%

    Command to inspect the output file metadata with ffmpeg :

    ffmpeg -i VID_20130502_220104-2.avi
    

    
ffmpeg version 3.1.5 Copyright (c) 2000-2016 the FFmpeg developers
    
  built with gcc 5.4.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
    
  libavutil      55. 28.100 / 55. 28.100
    
  libavcodec     57. 48.101 / 57. 48.101
    
  libavformat    57. 41.100 / 57. 41.100
    
  libavdevice    57.  0.101 / 57.  0.101
    
  libavfilter     6. 47.100 /  6. 47.100
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  1.100 /  2.  1.100
    
  libpostproc    54.  0.100 / 54.  0.100
    
Guessed Channel Layout for Input Stream #0.1 : mono
    
Input #0, avi, from 'VID_20130502_220104-2.avi':
    
  Metadata:
    
    encoder         : Lavf57.41.100
    
  Duration: 00:01:30.50, start: 0.000000, bitrate: 32136 kb/s
    
    Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 31782 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc
    
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s
    
At least one output file must be specified

    Command to inspect the input file metadata with exiftool :

    exiftool.exe VID_20130502_220104.avi
    

    
ExifTool Version Number         : 10.30
    
File Name                       : VID_20130502_220104.avi
    
Directory                       : .
    
File Size                       : 347 MB
    
File Modification Date/Time     : 2013:05:13 16:33:52-04:00
    
File Access Date/Time           : 2015:11:10 23:08:25-05:00
    
File Creation Date/Time         : 2015:11:10 23:08:25-05:00
    
File Permissions                : rw-rw-rw-
    
File Type                       : AVI
    
File Type Extension             : avi
    
MIME Type                       : video/x-msvideo
    
Frame Rate                      : 30
    
Max Data Rate                   : 488.3 kB/s
    
Frame Count                     : 2715
    
Stream Count                    : 2
    
Stream Type                     : Video
    
Video Codec                     : mjpg
    
Video Frame Rate                : 30
    
Video Frame Count               : 2715
    
Quality                         : 10000
    
Sample Size                     : Variable
    
Image Width                     : 1280
    
Image Height                    : 720
    
Planes                          : 1
    
Bit Depth                       : 24
    
Compression                     : MJPG
    
Image Length                    : 2764800
    
Pixels Per Meter X              : 0
    
Pixels Per Meter Y              : 0
    
Num Colors                      : Use BitDepth
    
Num Important Colors            : All
    
Audio Codec                     : 
    
Audio Sample Rate               : 22050
    
Audio Sample Count              : 1995256
    
Encoding                        : Microsoft PCM
    
Num Channels                    : 1
    
Sample Rate                     : 22050
    
Avg Bytes Per Sec               : 44100
    
Bits Per Sample                 : 16
    
Maker Note Type                 : NIKON
    
Maker Note Version              : 0.1.0.0
    
Make                            : NIKON
    
Model                           : COOLPIX S4300
    
Software                        : V1.0
    
Equipment                       : NIKON DIGITAL CAMERA
    
Orientation                     : Horizontal (normal)
    
Exposure Time                   : 1/15
    
F Number                        : 3.5
    
Exposure Compensation           : 0
    
Max Aperture Value              : 3.2
    
Metering Mode                   : Multi-segment
    
Focal Length                    : 4.6 mm
    
X Resolution                    : 72
    
Y Resolution                    : 72
    
Resolution Unit                 : inches
    
Date/Time Original              : 2011:01:01 00:00:00
    
Create Date                     : 2011:01:01 00:00:00
    
Focus Mode                      : AF-S
    
Digital Zoom                    : 1
    
Color Mode                      : COLOR
    
Sharpness                       : AUTO
    
White Balance                   : NORMAL
    
Noise Reduction                 : OFF
    
Thumbnail Image                 : (Binary data 3082 bytes, use -b option to extract)
    
Aperture                        : 3.5
    
Duration                        : 0:01:30
    
Image Size                      : 1280x720
    
Megapixels                      : 0.922
    
Shutter Speed                   : 1/15
    
Focal Length                    : 4.6 mm

    Command to inspect the output file metadata with exiftool :

    exiftool.exe VID_20130502_220104-2.avi
    

    
ExifTool Version Number         : 10.30
    
File Name                       : VID_20130502_220104-2.avi
    
Directory                       : .
    
File Size                       : 347 MB
    
File Modification Date/Time     : 2016:11:01 00:17:38-04:00
    
File Access Date/Time           : 2016:11:01 00:17:36-04:00
    
File Creation Date/Time         : 2016:11:01 00:15:18-04:00
    
File Permissions                : rw-rw-rw-
    
File Type                       : AVI
    
File Type Extension             : avi
    
MIME Type                       : video/x-msvideo
    
Frame Rate                      : 30
    
Max Data Rate                   : 3923 kB/s
    
Frame Count                     : 2715
    
Stream Count                    : 2
    
Stream Type                     : Video
    
Video Codec                     : MJPG
    
Video Frame Rate                : 30
    
Video Frame Count               : 2715
    
Quality                         : Default
    
Sample Size                     : Variable
    
Image Width                     : 1280
    
Image Height                    : 720
    
Planes                          : 1
    
Bit Depth                       : 24
    
Compression                     : MJPG
    
Image Length                    : 2764800
    
Pixels Per Meter X              : 0
    
Pixels Per Meter Y              : 0
    
Num Colors                      : Use BitDepth
    
Num Important Colors            : All
    
Audio Codec                     : .
    
Audio Sample Rate               : 22050
    
Audio Sample Count              : 1995256
    
Encoding                        : Microsoft PCM
    
Num Channels                    : 1
    
Sample Rate                     : 22050
    
Avg Bytes Per Sec               : 44100
    
Bits Per Sample                 : 16
    
Software                        : Lavf57.41.100
    
Duration                        : 0:01:30
    
Image Size                      : 1280x720
    
Megapixels                      : 0.922

  • Failed to execute : 0x80070057, when decoding video via ffmpeg with dxva2

    25 mars 2019, par CD83

    I have successfully implemented a video player using ffmpeg. I am now trying to use hardware decoding but I’m facing a couple issues.
    I found a post that I followed as a starting point here : https://ffmpeg.org/pipermail/libav-user/2014-August/007323.html

    I have updated the code that setup the necessary stuff for the decoder. The updated code is available here : https://drive.google.com/file/d/0B5ufHdoDzA4ieVk5UVpxcDNzRHc/view?usp=sharing

    And this is how I’m using it to initialize the decoder :

    // Prepare the decoding context
    
AVCodec *codec = nullptr;
    
_codecContext = _avFormatContext->streams[_streamIndex]->codec;
    
if ((codec = avcodec_find_decoder(_codecContext->codec_id)) == 0)
    
{
    
    std::cout << "Unsupported video codec!" << std::endl;
    
    return false;
    
}
    

    
_codecContext->thread_count = 1;  // Multithreading is apparently not compatible with hardware decoding
    
InputStream *ist = new InputStream();
    
ist->hwaccel_id = HWACCEL_AUTO;
    
ist->hwaccel_device = "dxva2";
    
ist->dec = codec;
    
ist->dec_ctx = _codecContext;
    
_codecContext->coded_width = _width;
    
_codecContext->coded_height = _height;
    

    
_codecContext->opaque = ist;
    
dxva2_init(_codecContext);
    

    
_codecContext->get_buffer2 = ist->hwaccel_get_buffer;
    
_codecContext->get_format = GetHwFormat;
    
_codecContext->thread_safe_callbacks = 1;
    

    
if (avcodec_open2(_codecContext, codec, nullptr) < 0)
    
{
    
    std::cout << "Video codec open error" << std::endl;
    
    return false;
    
}

    And here is the definition of GetHwFormat referenced above :

    AVPixelFormat GetHwFormat(AVCodecContext *s, const AVPixelFormat *pix_fmts)
    
{
    
    InputStream* ist = (InputStream*)s->opaque;
    
    ist->active_hwaccel_id = HWACCEL_DXVA2;
    
    ist->hwaccel_pix_fmt = AV_PIX_FMT_DXVA2_VLD;
    
    return ist->hwaccel_pix_fmt;
    
}

    When I open an mp4 (encoded in h264) video that is HD resolution or less, everything seems to be working fine. However, as soon as I try higher resolution videos like 3840x2160, I get the following errors repeatedly :

    Failed to execute: 0x80070057
    
Hardware accelerator failed to decode picture

    I also start getting the following errors after a few seconds :

    co located POCs unavailable

    And the video is not displayed properly : I get a lot of artifacts all over the video and it is lagging. I checked the first error in the ffmpeg source code. It seems that IDirectXVideoDecoder_Execute fails because of an invalid parameter. Since this is happening withing ffmpeg, there must be something that I’m missing but I can’t figure out what. The only relevant post that I found with this error was because of multithreading but I set the thread_count to 1 before opening the codec.

    This issue is happening on my main computer which has the following specs :

    • i7-4790 CPU @ 3.6GHz
    • RAM 16 GB
    • Intel HD Graphics 4600
    • Windows 8.1

    The same issue is not happening on my second computer which has the following specs :

    • i7 4510U @ 2GHz
    • RAM 8 GB
    • NVIDIA GeForce GTX 750Ti
    • Windows 10

    If I use DXVAChecker on my main computer, it says that my graphics card supports DXVA2 for H264_VLD_*, and I can see that the calls to the Microsoft API are being made (DXVA2_DecodeDeviceCreated, DXVA2_DecodeDeviceBeginFrame, DXVA2_DecodeDeviceGetBuffer, DXVA2_DecodeDeviceExecute, DXVA2_DecodeDeviceEndFrame) while my video is playing.

    I also don’t see any increase of GPU usage (on either computer) between the version with hardware decoding and the version without ; however, I do see a decrease in CPU usage (not as much as I was expecting though). This is also very strange.

    Note that I tried both the Windows release available on the FFmpeg website, and a version that I compiled with —enable-dxva2. I have searched a lot already but I was unable to find what I’m doing wrong.

    Hopefully, someone can help me, or maybe point me to a better example ?

  • Failed to execute : 0x80070057, when decoding video via ffmpeg with dxva2

    18 avril 2016, par CD83

    I have successfully implemented a video player using ffmpeg. I am now trying to use hardware decoding but I’m facing a couple issues.
    I found a post that I followed as a starting point here : http://comments.gmane.org/gmane.comp.video.ffmpeg.libav.user/13523

    I have updated the code that setup the necessary stuff for the decoder. The updated code is available here : https://drive.google.com/file/d/0B5ufHdoDzA4ieVk5UVpxcDNzRHc/view?usp=sharing

    And this is how I’m using it to initialize the decoder :

    // Prepare the decoding context
    
AVCodec *codec = nullptr;
    
_codecContext = _avFormatContext->streams[_streamIndex]->codec;
    
if ((codec = avcodec_find_decoder(_codecContext->codec_id)) == 0)
    
{
    
    std::cout << "Unsupported video codec!" << std::endl;
    
    return false;
    
}
    

    
_codecContext->thread_count = 1;  // Multithreading is apparently not compatible with hardware decoding
    
InputStream *ist = new InputStream();
    
ist->hwaccel_id = HWACCEL_AUTO;
    
ist->hwaccel_device = "dxva2";
    
ist->dec = codec;
    
ist->dec_ctx = _codecContext;
    
_codecContext->coded_width = _width;
    
_codecContext->coded_height = _height;
    

    
_codecContext->opaque = ist;
    
dxva2_init(_codecContext);
    

    
_codecContext->get_buffer2 = ist->hwaccel_get_buffer;
    
_codecContext->get_format = GetHwFormat;
    
_codecContext->thread_safe_callbacks = 1;
    

    
if (avcodec_open2(_codecContext, codec, nullptr) < 0)
    
{
    
    std::cout << "Video codec open error" << std::endl;
    
    return false;
    
}

    And here is the definition of GetHwFormat referenced above :

    AVPixelFormat GetHwFormat(AVCodecContext *s, const AVPixelFormat *pix_fmts)
    
{
    
    InputStream* ist = (InputStream*)s->opaque;
    
    ist->active_hwaccel_id = HWACCEL_DXVA2;
    
    ist->hwaccel_pix_fmt = AV_PIX_FMT_DXVA2_VLD;
    
    return ist->hwaccel_pix_fmt;
    
}

    When I open an mp4 (encoded in h264) video that is HD resolution or less, everything seems to be working fine. However, as soon as I try higher resolution videos like 3840x2160, I get the following errors repeatedly :

    Failed to execute: 0x80070057
    
Hardware accelerator failed to decode picture

    I also start getting the following errors after a few seconds :

    co located POCs unavailable

    And the video is not displayed properly : I get a lot of artifacts all over the video and it is lagging. I checked the first error in the ffmpeg source code. It seems that IDirectXVideoDecoder_Execute fails because of an invalid parameter. Since this is happening withing ffmpeg, there must be something that I’m missing but I can’t figure out what. The only relevant post that I found with this error was because of multithreading but I set the thread_count to 1 before opening the codec.

    This issue is happening on my main computer which has the following specs :

    • i7-4790 CPU @ 3.6GHz
    • RAM 16 GB
    • Intel HD Graphics 4600
    • Windows 8.1

    The same issue is not happening on my second computer which has the following specs :

    • i7 4510U @ 2GHz
    • RAM 8 GB
    • NVIDIA GeForce GTX 750Ti
    • Windows 10

    If I use DXVAChecker on my main computer, it says that my graphics card supports DXVA2 for H264_VLD_*, and I can see that the calls to the Microsoft API are being made (DXVA2_DecodeDeviceCreated, DXVA2_DecodeDeviceBeginFrame, DXVA2_DecodeDeviceGetBuffer, DXVA2_DecodeDeviceExecute, DXVA2_DecodeDeviceEndFrame) while my video is playing.

    I also don’t see any increase of GPU usage (on either computer) between the version with hardware decoding and the version without ; however, I do see a decrease in CPU usage (not as much as I was expecting though). This is also very strange.

    Note that I tried both the Windows release available on the FFmpeg website, and a version that I compiled with —enable-dxva2. I have searched a lot already but I was unable to find what I’m doing wrong.

    Hopefully, someone can help me, or maybe point me to a better example ?

Navigation