Recherche avancée
Médias (1)
-
The pirate bay depuis la Belgique
1er avril 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Image
Autres articles (14)
-
La file d’attente de SPIPmotion
28 novembre 2010, parUne 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 (...) -
Contribute to documentation
13 avril 2011Documentation is vital to the development of improved technical capabilities.
MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
To contribute, register to the project users’ mailing (...) -
Selection of projects using MediaSPIP
2 mai 2011, parThe examples below are representative elements of MediaSPIP specific uses for specific projects.
MediaSPIP farm @ Infini
The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)
Sur d’autres sites (2553)
-
ffmpeg library - why is the Bitrate parameter change on encoding
22 avril 2021, par QRrabbitHello forum and all the members of the community !


I have this question on ffmpeg library, why does the bitrate parameter not retained after encoding, even though I explicitly specify the desired rate.


Input file ffprobe :


Duration: 00:00:10.01, start: 0.000000, bitrate: 534719 kb/s
 Stream #0:0(eng): Video: qtrle (rle / 0x20656C72), argb(progressive), 1920x1080, 533881 kb/s, SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc (default)
 Metadata:
 creation_time : 2021-04-13T16:35:16.000000Z
 handler_name : Apple Video Media Handler
 encoder : Animation
 timecode : 00:00:00;00


Here's the command I run :


ffmpeg -i input.mov -map 0:a? -map 0:s? -pix_fmt argb -b:v 533881667 -maxrate 533881667 -minrate 533881667 -r 29.97 -top 1 -color_range 1 -colorspace 1 -color_primaries 1 -color_trc bt709 -map_metadata 0 -c:a copy -timecode 00:00:00.00 -c:v qtrle -c:s copy output.mov


Output file ffprobe :


Metadata:
 major_brand : qt 
 minor_version : 512
 compatible_brands: qt 
 creation_time : 2021-04-13T16:35:16.000000Z
 Duration: 00:00:10.01, start: 0.000000, bitrate: 100126 kb/s
 Stream #0:0: Video: qtrle (rle / 0x20656C72), argb(progressive), 1920x1080, 100133 kb/s, SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 11988 tbn, 11988 tbc (default)
 Metadata:
 creation_time : 2021-04-13T16:35:16.000000Z
 handler_name : VideoHandler
 encoder : Lavf58.58.100
 timecode : 00:00:00;00


As it is visible from the ffprobe from above, I go from :


The Input's file bitrate : 534719 kb/s
to Output bitrate : 100126 kb/s


-
CDN do not allow me to convert mov video format to mp4
16 avril 2021, par AzzoI have tried so many thinks on stackoverflow but didn't fix my issue. So I am using following code for converting mov video format to mp4 video format. The code is working fine if I disable CDN but when I enable CDN then ffmpeg didn't work. What is wrong with CDN with the code below ?


$cmd = shell_exec("ffmpeg -i video.mov -vcodec copy -acodec copy video.mp4");


Command :


ffmpeg version 3.4.8 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39) configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --extra-ldflags='-Wl,-z,relro ' --extra-cflags=' ' --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 --enable-bzlib --disable-crystalhd --enable-fontconfig --enable-gcrypt --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libcdio --enable-libdrm --enable-indev=jack --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-libopenjpeg --enable-libopus --disable-encoder=libopus --enable-libpulse --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvidstab --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzvbi --enable-avfilter --enable-avresample --enable-libmodplug --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-libmfx --enable-runtime-cpudetect 
libavutil 55. 78.100 / 55. 78.100 libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100 
libavdevice 57. 10.100 / 57. 10.100 
libavfilter 6.107.100 / 6.107.100 
libavresample 3. 7. 0 / 3. 7. 0 
libswscale 4. 8.100 / 4. 8.100 
libswresample 2. 9.100 / 2. 9.100 
libpostproc 54. 7.100 / 54. 7.100 
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x1324920] stream 1, offset 0x24: partial file [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1324920] 
Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none(smpte170m/bt709/bt709), 480x360, 777 kb/s): unspecified pixel format Consider increasing the value for the 'analyzeduration' and 'probesize' options Input #0, mov,mp4,m4a,3gp,3g2,mj2, 
from 'https://dev.websiteaddress.com/uploads/files/2021-04-16/image_1618597539012465400_5.mov': Metadata: major_brand : qt minor_version : 0 
compatible_brands: qt creation_time : 2021-04-10T23:22:06.000000Z com.apple.quicktime.make: Apple com.apple.quicktime.model: iPhone 12 Pro com.apple.quicktime.software: 14.4.2 com.apple.quicktime.creationdate: 2021-04-11T07:22:06+0800 Duration: 00:00:02.73, bitrate: N/A Stream #0:0(und): Video: h264 (avc1 / 0x31637661), none(smpte170m/bt709/bt709), 480x360, 777 kb/s, 30 fps, 30 tbr, 600 tbn, 1200 tbc (default) Metadata: creation_time : 2021-04-10T23:22:06.000000Z handler_name : Core Media Data Handler encoder : H.264 Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 84 kb/s (default) Metadata: creation_time : 2021-04-10T23:22:06.000000Z handler_name : Core Media Data Handler Stream #0:2(und): Data: none (mebx / 0x7862656D), 0 kb/s (default) Metadata: creation_time : 2021-04-10T23:22:06.000000Z handler_name : Core Media Data Handler Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default) Metadata: creation_time : 2021-04-10T23:22:06.000000Z handler_name : Core Media Data Handler Stream #0:4(und): Data: none (mebx / 0x7862656D), 34 kb/s (default) Metadata: creation_time : 2021-04-10T23:22:06.000000Z handler_name : Core Media Data Handler [NULL @ 0x138e6e0] Unable to find a suitable output format for 'ff.log' ff.log: Invalid argument


-
How do you specify container format in FFmpeg ?
15 avril 2021, par TheNeuronalCoderI am trying to encode mp4 video, but it doesn't open on my macbook because while it has the supported H264 codec, the container format is not MP4. So all I ask is how you would go about specifying the container format so I can generate video that is actually playable without using ffplay.


ffprobe version N-101948-g870bfe1 Copyright (c) 2007-2021 the FFmpeg developers
 built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
 configuration: --disable-asm --enable-shared --enable-libx264 --enable-gpl
 libavutil 56. 72.100 / 56. 72.100
 libavcodec 58.136.101 / 58.136.101
 libavformat 58. 78.100 / 58. 78.100
 libavdevice 58. 14.100 / 58. 14.100
 libavfilter 7.111.100 / 7.111.100
 libswscale 5. 10.100 / 5. 10.100
 libswresample 3. 10.100 / 3. 10.100
 libpostproc 55. 10.100 / 55. 10.100
Input #0, h264, from 'animation.mp4':
 Duration: N/A, bitrate: N/A
 Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080, 24.33 fps, 24 tbr, 1200k tbn, 48 tbc


void imagine::Camera::Record() {
 if (recording_ == true)
 throw std::runtime_error(
 "you must close your camera before starting another recording"
 );
 recording_ = true;

 output_file_ = std::fopen(output_.c_str(), "wb");
 if (!output_file_)
 throw std::runtime_error("failed to open file");

 AVCodec* codec = avcodec_find_encoder(AV_CODEC_ID_H264);
 if (!codec)
 throw std::runtime_error("failed to find codec");

 context_ = avcodec_alloc_context3(codec);
 if (!context_)
 throw std::runtime_error("failed to allocate video codec context");

 packet_ = av_packet_alloc();
 if (!packet_)
 throw std::runtime_error("failed to allocate video packet");

 py::tuple size = py::globals()["main_scene"].attr("size");
 context_->width = size[0].cast<int>();
 context_->height = size[1].cast<int>();
 context_->bit_rate = 0.4 * fps_ * context_->width * context_->height;
 context_->time_base = (AVRational){ 1, fps_ };
 context_->framerate = (AVRational){ fps_, 1 };
 context_->gop_size = 10;
 context_->max_b_frames = 1;
 context_->pix_fmt = AV_PIX_FMT_YUV420P;

 if (avcodec_open2(context_, codec, NULL) < 0)
 throw std::runtime_error("failed to open codec");

 frame_ = av_frame_alloc();
 if (!frame_)
 throw std::runtime_error("failed to allocate video frame");

 frame_->width = context_->width;
 frame_->height = context_->height;
 frame_->format = AV_PIX_FMT_YUV420P;

 if (av_frame_get_buffer(frame_, 0) < 0)
 throw std::runtime_error("failed to allocate the video frame data");
}
</int></int>

Syndiquer tout le site
