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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 (...) -
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela. -
Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)
Sur d’autres sites (9859)
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MP4 file starts from a non-key frame [closed]
1er octobre 2023, par userDtrmI have used the following ffprobe command to analyse a .mp4 file.




ffprobe -i <input /> -show_frames - select_streams v:0 -print_format flat &> save_to_file.text



It produces the following output.




 ffprobe version 5.1.3 Copyright (c) 2007-2022 the FFmpeg developers
 built with gcc 13 (GCC)
 configuration : —prefix=/home/thanuja/ffmpeg_build —pkg-config-flags=—static —extra-cflags=-I/home/thanuja/ffmpeg_build/include —extra-ldflags=-L/home/thanuja/ffmpeg_build/lib —extra-libs=-lpthread —extra-libs=-lm —bindir=/home/thanuja/bin —enable-gpl —enable-libfdk_aac —enable-libfreetype —enable-libmp3lame —enable-libopus —enable-libvpx —enable-libx264 —enable-libx265 —enable-nonfree —enable-openssl —enable-demuxer=spdif —enable-decoder=dolby_e —enable-decoder=ac3 —enable-decoder=eac3 —enable-indev=alsa —enable-outdev=alsa —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
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'FTV267StoS.mp4' :
 Metadata :
 major_brand : mp42
 minor_version : 1
 compatible_brands : isommp41mp42
 creation_time : 2023-04-02T23:52:12.000000Z
 Duration : 00:04:47.84, start : 0.000000, bitrate : 7374 kb/s
 Stream #0:0[0x1](und) : Video : h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/unknown/bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 7198 kb/s, 59.94 fps, 59.94 tbr, 90k tbn (default)
 Metadata :
 creation_time : 2023-04-02T23:52:12.000000Z
 handler_name : Core Media Video
 vendor_id : [0][0][0][0]
 Stream #0:1[0x2](eng) : Audio : aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 125 kb/s (default)
 Metadata :
 creation_time : 2023-04-02T23:52:12.000000Z
 handler_name : Core Media Audio
 vendor_id : [0][0][0][0]
 frames.frame.0.media_type="video"
 frames.frame.0.stream_index=0
 frames.frame.0.key_frame=0
 frames.frame.0.pts=34536
 frames.frame.0.pts_time="0.383733"
 frames.frame.0.pkt_dts=34536
 frames.frame.0.pkt_dts_time="0.383733"
 frames.frame.0.best_effort_timestamp=34536
 frames.frame.0.best_effort_timestamp_time="0.383733"
 frames.frame.0.pkt_duration=1501
 frames.frame.0.pkt_duration_time="0.016678"
 frames.frame.0.pkt_pos="1834827"
 frames.frame.0.pkt_size="14917"
 frames.frame.0.width=1920
 frames.frame.0.height=1080
 frames.frame.0.pix_fmt="yuv420p"
 frames.frame.0.sample_aspect_ratio="1:1"
 frames.frame.0.pict_type="P"
 frames.frame.0.coded_picture_number=120
 frames.frame.0.display_picture_number=0
 frames.frame.0.interlaced_frame=0
 frames.frame.0.top_field_first=0
 frames.frame.0.repeat_pict=0
 frames.frame.0.color_range="tv"
 frames.frame.0.color_space="bt709"
 frames.frame.0.color_primaries="unknown"
 frames.frame.0.color_transfer="bt709"
 frames.frame.0.chroma_location="left"
 frames.frame.0.tags.timecode="20:18:26:50"
 frames.frame.0.side_data_list.side_data.0.side_data_type="H.26[45] User Data Unregistered SEI message"
 frames.frame.0.side_data_list.side_data.1.side_data_type="H.26[45] User Data Unregistered SEI message"
 frames.frame.0.side_data_list.side_data.2.side_data_type="SMPTE 12-1 timecode"
 frames.frame.0.side_data_list.side_data.2.timecodes.timecode.0.value="20:18:26:50"
 frames.frame.1.media_type="video"
 frames.frame.1.stream_index=0
 frames.frame.1.key_frame=0
 frames.frame.1.pts=36036
 frames.frame.1.pts_time="0.400400"
 frames.frame.1.pkt_dts=36036
 frames.frame.1.pkt_dts_time="0.400400"
 frames.frame.1.best_effort_timestamp=36036
 frames.frame.1.best_effort_timestamp_time="0.400400"
 frames.frame.1.pkt_duration=1501
 frames.frame.1.pkt_duration_time="0.016678"
 frames.frame.1.pkt_pos="1857434"
 frames.frame.1.pkt_size="14472"
 frames.frame.1.width=1920
 frames.frame.1.height=1080
 frames.frame.1.pix_fmt="yuv420p"
 frames.frame.1.sample_aspect_ratio="1:1"
 frames.frame.1.pict_type="P"




As seen in this output, the 1st frame appears to be a P frame. I'm curious as to how will the decoder decode this frame without a preceding I frame (key frame) ? The P frame will not have enough information to reconstruct the image from its residual data without the key frame.


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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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