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Dépôt de média et thèmes par FTP
31 mai 2013, parL’outil MédiaSPIP traite aussi les média transférés par la voie FTP. Si vous préférez déposer par cette voie, récupérez les identifiants d’accès vers votre site MédiaSPIP et utilisez votre client FTP favori.
Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...) -
Keeping control of your media in your hands
13 avril 2011, parThe vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...) -
Les autorisations surchargées par les plugins
27 avril 2010, parMediaspip core
autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs
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Cropping a video from Sony A7 Camera using ffmpeg
23 octobre 2023, par Mike SlinnI want to crop a video file created by a Sony A7iii camera, so only the portion from 0:51 through 2:45 is extracted.
The camera adds streams that need to be ignored.


ffprobeshows the error on input stream 2, however the problem I am reporting deals with input stream 3, which is a data stream, and is not required. I want to exclude input stream 3, then deal with input stream 2.

$ ffprobe myfile.mp4
ffprobe version 3.0-static http://johnvansickle.com/ffmpeg/ Copyright (c) 2007-2016 the FFmpeg developers
 built with gcc 5.3.1 (Debian 5.3.1-8) 20160205
 configuration: --enable-gpl --enable-version3 --disable-shared --disable-debug --enable-runtime-cpudetect --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libwebp --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libfreetype --enable-fontconfig --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg --enable-libopus --enable-libass --enable-gnutls --enable-libvidstab --enable-libsoxr --enable-frei0r --enable-libfribidi --disable-indev=sndio --disable-outdev=sndio --enable-librtmp --enable-libmfx --cc=gcc
 libavutil 55. 17.103 / 55. 17.103
 libavcodec 57. 24.102 / 57. 24.102
 libavformat 57. 25.100 / 57. 25.100
 libavdevice 57. 0.101 / 57. 0.101
 libavfilter 6. 31.100 / 6. 31.100
 libswscale 4. 0.100 / 4. 0.100
 libswresample 2. 0.101 / 2. 0.101
 libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'myfile.mp4':
 Metadata:
 major_brand : XAVC
 minor_version : 16785407
 compatible_brands: XAVCmp42iso2
 creation_time : 2023-01-05 00:52:24
 Duration: 00:10:58.16, start: 0.000000, bitrate: 51445 kb/s
 Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/iec61966-2-4), 1920x1080 [SAR 1:1 DAR 16:9], 49370 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)
 Metadata:
 creation_time : 2023-01-05 00:52:24
 handler_name : Video Media Handler
 encoder : AVC Coding
 Stream #0:1(und): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, 2 channels, s16, 1536 kb/s (default)
 Metadata:
 creation_time : 2023-01-05 00:52:24
 handler_name : Sound Media Handler
 Stream #0:2(und): Data: none (rtmd / 0x646D7472), 491 kb/s (default)
 Metadata:
 creation_time : 2023-01-05 00:52:24
 handler_name : Timed Metadata Media Handler
Unsupported codec with id 0 for input stream 2


Predictably,
ffmpegfails becauseffprobefailed.

$ ffmpeg -y -i 'myfile.mp4' -ss 51 -to 2:45 -acodec copy 'myfile.crop.mp4'
ffmpeg version 5.1.2-3ubuntu1 Copyright (c) 2000-2022 the FFmpeg developers
 built with gcc 12 (Ubuntu 12.2.0-14ubuntu2)
 configuration: --prefix=/usr --extra-version=3ubuntu1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-libjxl --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared
 libavutil 57. 28.100 / 57. 28.100
 libavcodec 59. 37.100 / 59. 37.100
 libavformat 59. 27.100 / 59. 27.100
 libavdevice 59. 7.100 / 59. 7.100
 libavfilter 8. 44.100 / 8. 44.100
 libswscale 6. 7.100 / 6. 7.100
 libswresample 4. 7.100 / 4. 7.100
 libpostproc 56. 6.100 / 56. 6.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55d61a97fc80] st: 0 edit list: 1 Missing key frame while searching for timestamp: 1001
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55d61a97fc80] st: 0 edit list 1 Cannot find an index entry before timestamp: 1001.
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'myfile.mp4':
 Metadata:
 major_brand : XAVC
 minor_version : 16785407
 compatible_brands: XAVCmp42iso2
 creation_time : 2023-01-05T00:52:24.000000Z
 Duration: 00:10:58.16, start: 0.000000, bitrate: 51445 kb/s
 Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/iec61966-2-4, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 49370 kb/s, 59.94 fps, 59.94 tbr, 60k tbn (default)
 Metadata:
 creation_time : 2023-01-05T00:52:24.000000Z
 handler_name : Video Media Handler
 vendor_id : [0][0][0][0]
 encoder : AVC Coding
 Stream #0:1[0x2](und): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, stereo, s16, 1536 kb/s (default)
 Metadata:
 creation_time : 2023-01-05T00:52:24.000000Z
 handler_name : Sound Media Handler
 vendor_id : [0][0][0][0]
 Stream #0:2[0x3](und): Data: none (rtmd / 0x646D7472), 491 kb/s (default)
 Metadata:
 creation_time : 2023-01-05T00:52:24.000000Z
 handler_name : Timed Metadata Media Handler
 timecode : 03:52:30:26
Stream mapping:
 Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
 Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[libx264 @ 0x55d61aa58a80] using SAR=1/1
[libx264 @ 0x55d61aa58a80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x55d61aa58a80] profile High, level 4.2, 4:2:0, 8-bit
[libx264 @ 0x55d61aa58a80] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: 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=34 lookahead_threads=5 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
[mp4 @ 0x55d61aa57cc0] Could not find tag for codec pcm_s16be in stream #1, codec not currently supported in container
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:0 --
Conversion failed!


I tried various incantations that specified permutations of
-mapoptions, but only dug myself a deeper hole.

How might I perform the extraction ? I am not interested in preserving extra streams, I just want the main video and stereo audio streams.


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memcpy to av_malloc's memory crash
26 octobre 2023, par PeacefulWindyI use the code in x64 windows :


#include<iostream>
#include<memory>
#include<vector>
extern "C"
{
#include <libavcodec></libavcodec>avcodec.h>
#include<libavformat></libavformat>avformat.h>
#include <libavutil></libavutil>imgutils.h>
#include<libswscale></libswscale>swscale.h>
#include<libswresample></libswresample>swresample.h>
}

struct BufferData
{
 uint8_t* ptr;
 size_t size;
 size_t file_size;
};

int main()
{
 auto file=fopen("E:/test.jpg", "rb");
 fseek(file, 0, SEEK_END);
 auto fileSize = ftell(file);
 fseek(file, 0, SEEK_SET);
 auto data = std::vector(fileSize);
 fread(data.data(), sizeof(uint8_t), fileSize, file);
 fclose(file);

 auto test = BufferData();
 test.ptr = data.data();
 test.size = data.size();
 test.file_size = data.size();
 auto buffer = (uint8_t*)av_malloc(4096 * 10);
 char errStr[128] = { 0 };

 auto avformatContext = avformat_alloc_context();
 auto avioContext = avio_alloc_context(buffer, 4096, 0, &test, [](void* opaque, uint8_t* buf, int buf_size)
 {
 BufferData* bd = (BufferData*)opaque;
 auto size = std::min(bd->size, (size_t)buf_size);

 if (!size)
 {
 return -1;
 }

 memcpy(buf, bd->ptr, size);
 bd->ptr += size;
 bd->size -= size;
 return (int)size;
 }, NULL, NULL);
 avformatContext->pb = avioContext;
 avformatContext->flags = AVFMT_FLAG_CUSTOM_IO;

 auto ret = avformat_open_input(&avformatContext, nullptr, nullptr, nullptr);
 if (ret != 0)
 {
 av_strerror(ret, errStr, sizeof(errStr));
 std::cout << errStr << std::endl;
 av_free(buffer);
 avformat_close_input(&avformatContext);
 return 0;
 }

 ret = avformat_find_stream_info(avformatContext, nullptr);
 if (ret < 0)
 {
 av_strerror(ret, errStr, sizeof(errStr));
 std::cout << errStr << std::endl;
 av_free(buffer);
 avformat_close_input(&avformatContext);
 return 0;
 }

 av_dump_format(avformatContext, 0, nullptr, 0);

 auto videoIndex = av_find_best_stream(avformatContext, AVMEDIA_TYPE_VIDEO, -1, -1, nullptr, 0);
 if (videoIndex == AVERROR_STREAM_NOT_FOUND)
 {
 av_free(buffer);
 avformat_close_input(&avformatContext);
 return 0;
 }
 else if (videoIndex == AVERROR_DECODER_NOT_FOUND)
 {
 av_free(buffer);
 avformat_close_input(&avformatContext);
 return 0;
 }

 auto videoCodecPar = avformatContext->streams[videoIndex]->codecpar;
 auto videoCodec = avcodec_find_decoder(videoCodecPar->codec_id);
 if (!videoCodec)
 {
 av_free(buffer);
 avformat_close_input(&avformatContext);
 return 0;
 }

 av_free(buffer);
 avformat_close_input(&avformatContext);
}
</vector></memory></iostream>

I use memcpy to copy data to buffer,it run to av_free(buffer) get crash.
ffmpeg version is 6.0.
Visual Studio version is 2022 with CMake.


Use fread replace memcpy,it can work !But I need to resolve load from std::vector memory,not fread.
I think maybe memory-align problem when run av_free,but I no way to find the cause.


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FFmpeg batchfile to compress images JPG JPEGs and keep EXIF (metadata)
24 novembre 2023, par esdoublelefI tried searching everywhere for a possible solution but I really can't find it. Hope someone can help me out here.


I have written a batch file to use FFmpeg to compress and sharpen JPGs in a folder.


@ECHO ON
 FOR %%a in (*.jpg) DO (ffmpeg -i "%%a" -q:v 8 -vf unsharp=5:5:1.0:5:5:0.0 "2022 01 22 %%~na".jpg)
PAUSE


The new file comes out smaller in size, but is missing all the EXIF information that the original photo has.


I tried to add in the command
-metadatabut apparently it works for MP4 only. I have an existing solution with ImageMagick but I'm hoping to solve this via FFmpeg.

Or is there a way to integrate exiftool into the batch file ?


Thank you and I really appreciate any help here.


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