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Autres articles (92)
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Organiser par catégorie
17 mai 2013, parDans 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 (...) -
Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs
12 avril 2011, parLa manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras. -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir
Sur d’autres sites (7475)
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How to generate a PDF (1.7) from a MP4 movie (Rich Media annotation) ?
19 août 2020, par malatI am a happy user of img2pdf. This tool does the minimal amount of work to put a series of JPEG 2000/JPEG/PNG images into a PDF "enveloppe". However I am now faced with a new challenge : embed a MP4 file into a PDF "enveloppe".


I see that commercial tool can do it, as seen at :




It seems to have been introduced in ISO 32000-1 (PDF 1.7 Extension Level 5)


I am looking for a solution which will use the Rich Media annotation inside the PDF stream.


There are dozen of duplicated questions on superuser/stackoverflow, which all pretty much refer to imagemagick/convert command line tool. But in my case,
convert
expand the images into a multi-page PDF (which is not my desired behavior) :

$ convert input.mp4 output.pdf
$ pdfinfo output.pdf 
Title: out
Producer: https://imagemagick.org
CreationDate: Wed Aug 19 15:38:01 2020 CEST
ModDate: Wed Aug 19 15:38:01 2020 CEST
Tagged: no
UserProperties: no
Suspects: no
Form: none
JavaScript: no
Pages: 1601
Encrypted: no
Page size: 352 x 288 pts
Page rot: 0
File size: 534407296 bytes
Optimized: no
PDF version: 1.3



with :


$ convert --version
Version: ImageMagick 6.9.10-23 Q16 x86_64 20190101 https://imagemagick.org
Copyright: © 1999-2019 ImageMagick Studio LLC
License: https://imagemagick.org/script/license.php
Features: Cipher DPC Modules OpenMP 
Delegates (built-in): bzlib djvu fftw fontconfig freetype jbig jng jpeg lcms lqr ltdl lzma openexr pangocairo png tiff webp wmf x xml zlib



and


$ file input.mp4 
input.mp4: ISO Media, MP4 Base Media v1 [IS0 14496-12:2003]
$ ffprobe -v quiet -print_format json -show_streams input.mp4 | grep codec_long_name
 "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",



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Why does FFMPEG work with 1080p but doesn't work with 720p size… (code included)
2 avril 2017, par JavaRunnerI’ve uploaded my fully compiled code with its Makefile here :
If I set 1280x720 I get the segmentation fault :
[libx264 @ 0x7fdf4d25a600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x7fdf4d25a600] profile High, level 3.1
[libx264 @ 0x7fdf4d25a600] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - 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=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=12 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=12 rc=abr mbtree=1 bitrate=3400 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '1.mp4':
Stream #0:0: Video: h264, yuv420p, 1280x720, q=2-31, 3400 kb/s, 20 tbn
Stream #0:1: Audio: aac (LC), 44100 Hz, stereo, fltp, 64 kb/s
sws_scale BEGIN
./MakeVideo.sh: line 2: 26422 Segmentation fault: 11 ./MakeVideo 1.mp4There’s some problem with this line :
std::cout << "sws_scale BEGIN\n";
sws_scale( sws_context, ( const uint8_t * const * ) &rgb, inLinesize, 0, frame->height, frame->data, frame->linesize );
std::cout << "sws_scale END\n";but if I set the size of a video to 1920x1080 or to 320x240 - all works fine.
Is that some sort of a magick ?? Or a bug ?
OS X 10.12.3
ffmpeg/3.2.4 —enable-shared —enable-pthreads —enable-gpl —enable-version3 —enable-hardcoded-tables —enable-avresample —cc=clang —host-cflags= —host-ldflags= —enable-libmp3lame —enable-libx264 —enable-libxvid —enable-opencl —disable-lzma —enable-vda -
FFmpeg - MP4 file converted from PNG files is not playable [closed]
2 mai 2024, par StamShamenI am attempting to use FFmpeg and JavaScript to convert multiple PNG files to an MP4 video. However, sometimes the output video is not playable (1kb) and no error appears in the output.


This is the command that I run :


ffmpeg -y -r 25 -i "videos-reporter/123/screenshots/%04d.png" -c:v libx264 -preset medium -crf 20 -pix_fmt yuv420p -vf "scale=1200:trunc(ow/a/2)*2,setpts=3.0*PTS" -threads 4 "videos-reporter/123/video.mp4"



Output of playable video :


Input #0, image2, from '/workspace/1/s/videos-reporter/MC4wMDM0NzUwNjg5NTc2NzMwMjI=/a464584b4d03585bd68abc0326e20b9a/screenshots/%04d.png':
 Duration: 00:00:01.44, start: 0.000000, bitrate: N/A
 Stream #0:0: Video: png, rgba(pc), 1920x1080, 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
 Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x53a1000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x53a1000] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0x53a1000] 264 - core 157 r2935 545de2f - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=4 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=10 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
Output #0, mp4, to 'videos-reporter/MC4wMDM0NzUwNjg5NTc2NzMwMjI=/a464584b4d03585bd68abc0326e20b9a/video.mp4':
 Metadata:
 encoder : Lavf58.24.100
 Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1200x674, q=-1--1, 10 fps, 10240 tbn, 10 tbc
 Metadata:
 encoder : Lavc58.42.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame= 52 fps=0.0 q=25.0 size= 0kB time=00:00:00.10 bitrate= 3.8kbits/s dup=34 drop=0 speed=0.125x 
video:84kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.457641%
[libx264 @ 0x53a1000] frame I:4 Avg QP: 5.16 size: 14568
[libx264 @ 0x53a1000] frame P:27 Avg QP:15.86 size: 790
[libx264 @ 0x53a1000] frame B:76 Avg QP:12.71 size: 73
[libx264 @ 0x53a1000] consecutive B-frames: 3.7% 1.9% 8.4% 86.0%
[libx264 @ 0x53a1000] mb I I16..4: 87.8% 4.1% 8.1%
[libx264 @ 0x53a1000] mb P I16..4: 3.1% 2.0% 0.4% P16..4: 0.4% 0.1% 0.0% 0.0% 0.0% skip:93.9%
[libx264 @ 0x53a1000] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 1.3% 0.1% 0.0% direct: 0.0% skip:98.6% L0:42.1% L1:57.7% BI: 0.2%
[libx264 @ 0x53a1000] 8x8 transform intra:12.8% inter:47.1%
[libx264 @ 0x53a1000] coded y,uvDC,uvAC intra: 5.9% 5.8% 5.1% inter: 0.0% 0.0% 0.0%
[libx264 @ 0x53a1000] i16 v,h,dc,p: 81% 18% 1% 0%
[libx264 @ 0x53a1000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 16% 60% 0% 0% 0% 0% 0% 1%
[libx264 @ 0x53a1000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 48% 16% 1% 2% 2% 3% 2% 4%
[libx264 @ 0x53a1000] i8c dc,h,v,p: 90% 7% 2% 0%
[libx264 @ 0x53a1000] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x53a1000] ref P L0: 72.8% 2.5% 14.1% 10.6%
[libx264 @ 0x53a1000] ref B L0: 88.2% 11.0% 0.9%
[libx264 @ 0x53a1000] ref B L1: 99.3% 0.7%
[libx264 @ 0x53a1000] kb/s:63.64



Output of not-playable video :


Input #0, image2, from '/workspace/1/s/videos-reporter/MC4zOTQ2Nzk4NzMwMjU0MTU5Ng==/20ae4ef3d1e642b26d348adc4246965d/screenshots/%04d.png':
 Duration: 00:00:01.60, start: 0.000000, bitrate: N/A
 Stream #0:0: Video: png, rgba(pc), 1920x1080, 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
 Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x5490c00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x5490c00] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0x5490c00] 264 - core 157 r2935 545de2f - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=4 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=10 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
Output #0, mp4, to 'videos-reporter/MC4zOTQ2Nzk4NzMwMjU0MTU5Ng==/20ae4ef3d1e642b26d348adc4246965d/video.mp4':
 Metadata:
 encoder : Lavf58.24.100
 Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1200x674, q=-1--1, 10 fps, 10240 tbn, 10 tbc
 Metadata:
 encoder : Lavc58.42.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1

stderr: frame= 19 fps=5.8 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A dup=12 drop=0 speed= 0x 
stderr: frame= 64 fps= 17 q=25.0 size= 0kB time=00:00:01.30 bitrate= 0.3kbits/s dup=42 drop=0 speed=0.343x 
stderr: frame= 119 fps= 25 q=-1.0 Lsize= 153kB time=00:00:11.60 bitrate= 108.2kbits/s dup=79 drop=0 speed=2.46x 
video:151kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.431093%

stderr: [libx264 @ 0x5490c00] frame I:5 Avg QP: 6.42 size: 14533
[libx264 @ 0x5490c00] frame P:32 Avg QP:16.29 size: 2284
[libx264 @ 0x5490c00] frame B:82 Avg QP:14.77 size: 100
[libx264 @ 0x5490c00] consecutive B-frames: 5.9% 1.7% 15.1% 77.3%
[libx264 @ 0x5490c00] mb I I16..4: 77.0% 14.4% 8.6%

stderr: [libx264 @ 0x5490c00] mb P I16..4: 9.2% 3.4% 1.3% P16..4: 2.5% 0.2% 0.1% 0.0% 0.0% skip:83.3%
[libx264 @ 0x5490c00] mb B I16..4: 0.1% 0.0% 0.0% B16..8: 1.8% 0.1% 0.0% direct: 0.0% skip:97.9% L0:42.9% L1:56.4% BI: 0.7%
[libx264 @ 0x5490c00] 8x8 transform intra:19.2% inter:66.1%
[libx264 @ 0x5490c00] coded y,uvDC,uvAC intra: 6.1% 7.5% 5.4% inter: 0.3% 0.4% 0.0%
[libx264 @ 0x5490c00] i16 v,h,dc,p: 61% 38% 1% 0%
[libx264 @ 0x5490c00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 47% 15% 37% 0% 0% 0% 0% 0% 0%
[libx264 @ 0x5490c00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 46% 14% 1% 2% 2% 3% 2% 3%
[libx264 @ 0x5490c00] i8c dc,h,v,p: 85% 13% 3% 0%
[libx264 @ 0x5490c00] Weighted P-Frames: Y:6.2% UV:6.2%
[libx264 @ 0x5490c00] ref P L0: 75.1% 5.0% 16.0% 3.9% 0.0%
[libx264 @ 0x5490c00] ref B L0: 77.6% 19.7% 2.7%
[libx264 @ 0x5490c00] ref B L1: 97.9% 2.1%
[libx264 @ 0x5490c00] kb/s:103.49



Your help is appreciated since I couldn't find any solution for it.