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Autres articles (96)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...) -
ANNEXE : Les plugins utilisés spécifiquement pour la ferme
5 mars 2010, parLe site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)
Sur d’autres sites (5233)
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FFmpeg overwrite an AVPacket
26 janvier 2019, par Alejandro RamírezHello guys I am working with video. I wan to encrypt the I-frames of one video compressed in
H.264. So I get theAVPacketfrom the video and compare if(AVPacket.flags & AV_PKT_FLAG_KEY)to know if the packet has an I frame, but when I try to print theAVPacket.dataI don’t have any information to encrypt.
Where can I get the information regarding toI-frame. ahead a put my code, thank you.#include <iostream>
extern "C" {
#include <libavcodec></libavcodec>avcodec.h>
#include <libavformat></libavformat>avformat.h>
#include <libswscale></libswscale>swscale.h>
#include <libavutil></libavutil>avutil.h>
}
#define INBUF_SIZE 4096
//#define AV_INPUT_BUFFER_PADDING_SIZE 32
int main (int argc, char * argv[])
{
//av_register_all();//omit
//revisar el número de argumentos en el video
AVFormatContext *pFormatCtx = NULL;
AVCodec *dec = NULL;
AVCodecContext *pCodecCtx = NULL;
AVStream *st = NULL;
AVDictionary *opts = NULL;
AVFrame *frame;
AVPacket avpkt;
uint8_t inbuf [INBUF_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
FILE *f;
int frame_count;
int video_stream_index = -1;
//av_init_packet (&avpkt);
memset (inbuf + INBUF_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
if (avformat_open_input (&pFormatCtx, argv[1], NULL, NULL) != 0)
return -1;
if (avformat_find_stream_info (pFormatCtx, NULL) < 0)
return -1;
//video_stream_index = av_find_best_stream (pFormatCtx,AVMEDIA_TYPE_VIDEO, -1, -1, &dec,0);
video_stream_index = av_find_best_stream (pFormatCtx,AVMEDIA_TYPE_VIDEO, -1, -1, &dec,0);
if ( video_stream_index < 0)
return -1;
std::cout << "video_stream; " << video_stream_index << "\n";
st = pFormatCtx -> streams [video_stream_index];
std::cout << "number of frames " << st -> nb_frames << "\n";
std::cout << "event_flags " << st -> event_flags << "\n";
//pCodecCtx = st -> codec;//deprecated
dec = avcodec_find_decoder (st -> codecpar -> codec_id);
std::cout << "codec_id: " << st -> codecpar -> codec_id << "\n";
std::cout << "AV_CODEC_ID_H264: " << AV_CODEC_ID_H264 << "\n";
if (!dec)
return -1;
pCodecCtx = avcodec_alloc_context3 (dec);
if (!pCodecCtx)
return -1;
//av_dict_set (&opts, "refcounted_frames", "0", 0);
avcodec_parameters_to_context (pCodecCtx, st -> codecpar);
std::cout << "todo bien \n";
if (avcodec_open2 (pCodecCtx, dec, &opts) < 0)
return -1;
/*************hasta aqui buen codigo*********************************************/
frame = av_frame_alloc ();
if (!frame)
return -1;
av_init_packet (&avpkt);
avpkt.data = NULL;
avpkt.size = 0;
f = fopen (argv[1], "r");
int times = 1;
while (av_read_frame (pFormatCtx, &avpkt) >= 0){
AVPacket oripkt = avpkt;
if (oripkt.stream_index == video_stream_index){
if (oripkt.flags & AV_PKT_FLAG_KEY){
std::cout << "times: " << times ++ << "\n";
std::cout << "avpkt.flags: " << oripkt.flags << "\n";
std::cout << "tam avpkt.data: " << sizeof(oripkt.data) << "\n";
std::cout << "tam avpkt.data: " << oripkt.data << "\n";
std::cout << "oripkt.size: " << oripkt.size << "\n";
std::cout << "oripkt.side_date_eme: " << oripkt.side_data_elems << "\n";
if (!oripkt.data)
std::cout << "no tengo dinero \n";
}
}
}
std::cout << "Fin del programa " << "\n";
}
</iostream> -
Converting mp4 audio & video for JavaScript's MediaSource API
10 janvier 2020, par CrayzzitSo I have two files.
frag_bunny.mp4andraw.mp4(you can download them in a tar on my Google drive). Thefrag_bunny.mp4works perfectly when I use it with the JavaScript’s MediaSource API. But it’s not the case withraw.mp4, why is that ?Here’s the
mediainfooffrag_bunny.mp4:General
Complete name : frag_bunny.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (mp42/avc1/iso5)
File size : 5.27 MiB
Duration : 1 min 0 s
Overall bit rate : 734 kb/s
Video
ID : 2
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L3
Format settings : 2 Ref Frames
Format settings, CABAC : No
Format settings, ReFrames : 2 frames
Format settings, GOP : M=1, N=64
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1 min 0 s
Bit rate : 613 kb/s
Width : 640 pixels
Height : 360 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 23.976 (23976/1000) FPS
Minimum frame rate : 7.317 FPS
Maximum frame rate : 24.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.111
Stream size : 4.39 MiB (83%)
Language : English
Color range : Limited
Color primaries : BT.601 NTSC
Transfer characteristics : BT.709
Matrix coefficients : BT.601
Audio
ID : 1
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : mp4a-40-2
Duration : 1 min 0 s
Bit rate mode : Constant
Bit rate : 64.0 kb/s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 22.05 kHz
Frame rate : 21.533 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 478 KiB (9%)
Language : English
Other #1
ID : 3
Type : Hint
Format : RTP
Codec ID : rtp
Duration : 1 min 0 s
Language : English
Other #2
ID : 4
Type : Hint
Format : RTP
Codec ID : rtp
Duration : 1 min 0 s
Language : EnglishAnd same for
raw.mp4:General
Complete name : raw.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/iso2/avc1/mp41)
File size : 16.9 MiB
Duration : 3 min 32 s
Overall bit rate : 668 kb/s
Writing application : Lavf57.83.100
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 3 min 32 s
Bit rate : 532 kb/s
Width : 640 pixels
Height : 360 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.092
Stream size : 13.4 MiB (80%)
Writing library : x264 core 152 r2854 e9a5903
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : mp4a-40-2
Duration : 3 min 32 s
Bit rate mode : Constant
Bit rate : 132 kb/s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 3.30 MiB (20%)
Default : Yes
Alternate group : 1And in my js, I’m using this codec :
...addSourceBuffer('video/mp4; codecs="avc1.42c00d,mp4a.40.2"') -
FFmpeg to transfer from bad media
31 décembre 2017, par TheSavoI have an SDcard that has two videos recorded from an old phone. The media is bad and I have already run SpinRite and chkdsk, to fix the errors. The files still fail to copy completely.
I can play some portion of the files in VLC player. It plays about as far as File copy and TeraCopy before the copy job fails.
They and MP4 files. I would like to use ffmpeg to transfer the portion of the video that will play out. is-ithe best parameter ?ffmpeg -i H:\badfile.mp4 e:\portion.mp4Here is the output from mediainfo if that helps
Complete name : H:\DCIM\badfile.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/3gp4)
File size : 422 MiB
Duration : 3 min 46 s
Overall bit rate : 15.6 Mb/s
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 1 Ref Frames
Format settings, CABAC : Yes
Format settings, RefFrames : 1 frame
Format settings, GOP : M=1, N=61
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 3 min 45 s
Bit rate : 15.5 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 19.469 FPS
Minimum frame rate : 14.085 FPS
Maximum frame rate : 30.303 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.385
Stream size : 418 MiB (99%)
Title : VideoHandle
Language : English
Encoded date : UTC 2013-09-17 13:18:06
Tagged date : UTC 2013-09-17 13:18:06
mdhd_Duration : 225892Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : mp4a-40-2
Duration : 3 min 46 s
Bit rate mode : Constant
Bit rate : 128 kb/s
Nominal bit rate : 96.0 kb/s
Channel(s) : 2 channels
Channel positions : Front : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 3.46 MiB (1%)
Title : SoundHandle
Language : English
Encoded date : UTC 2013-09-17 13:18:06
Tagged date : UTC 2013-09-17 13:18:06
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