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Autres articles (72)
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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 (...) -
Récupération d’informations sur le site maître à l’installation d’une instance
26 novembre 2010, parUtilité
Sur le site principal, une instance de mutualisation est définie par plusieurs choses : Les données dans la table spip_mutus ; Son logo ; Son auteur principal (id_admin dans la table spip_mutus correspondant à un id_auteur de la table spip_auteurs)qui sera le seul à pouvoir créer définitivement l’instance de mutualisation ;
Il peut donc être tout à fait judicieux de vouloir récupérer certaines de ces informations afin de compléter l’installation d’une instance pour, par exemple : récupérer le (...) -
Le plugin : Podcasts.
14 juillet 2010, parLe problème du podcasting est à nouveau un problème révélateur de la normalisation des transports de données sur Internet.
Deux formats intéressants existent : Celui développé par Apple, très axé sur l’utilisation d’iTunes dont la SPEC est ici ; Le format "Media RSS Module" qui est plus "libre" notamment soutenu par Yahoo et le logiciel Miro ;
Types de fichiers supportés dans les flux
Le format d’Apple n’autorise que les formats suivants dans ses flux : .mp3 audio/mpeg .m4a audio/x-m4a .mp4 (...)
Sur d’autres sites (2829)
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flvEncoder .flv output won't convert to .mp4 with ffmpeg
31 juillet 2013, par Emma AssinMy current project involves creating a .flv using AIR (using https://github.com/zeropointnine/leelib/tree/master/src/leelib/util/flvEncoder) - which then has to be converted into an .mp4, for which we are using ffmpeg.
The .mp4 output is the correct dimensions and duration, but blank (no images). Audio is not an issue as the original output has no audio.
ffmpeg version N-55020-g768e40b Copyright (c) 2000-2013 the FFmpeg developers
built on Jul 28 2013 18:05:44 with gcc 4.7.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --e
nable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable
-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enab
le-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheo
ra --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --en
able-libxavs --enable-libxvid --enable-zlib
libavutil 52. 40.100 / 52. 40.100
libavcodec 55. 19.100 / 55. 19.100
libavformat 55. 12.102 / 55. 12.102
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 81.103 / 3. 81.103
libswscale 2. 4.100 / 2. 4.100
libswresample 0. 17.103 / 0. 17.103
libpostproc 52. 3.100 / 52. 3.100
Input #0, flv, from 'testWithAudio.flv':
Metadata:
canSeekToEnd : true
metadatacreator : FlvEncoder v0.9 Lee Felarca
Duration: 00:00:44.77, start: 0.000000, bitrate: 56730 kb/s
Stream #0:0: Video: flashsv, bgr24, 400x400, 30 tbr, 1k tbn, 1k tbc
Stream #0:1: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
No pixel format specified, yuv444p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 00000000002e1da0] using cpu capabilities: MMX2 SSE2Fast SSEMisalign LZCNT
[libx264 @ 00000000002e1da0] profile High 4:4:4 Predictive, level 2.1, 4:4:4 8-bit
[libx264 @ 00000000002e1da0] 264 - core 135 r2345 f0c1c53 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - 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=4 threads=1 lookahead_threads=1 sl
iced_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 dire
ct=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
Output #0, mp4, to 'testWithAudio.mp4':
Metadata:
canSeekToEnd : true
metadatacreator : FlvEncoder v0.9 Lee Felarca
encoder : Lavf55.12.102
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 400x400, q=-1--1, 15360 tbn, 30 tbc
Stream #0:1: Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (flashsv -> libx264)
Stream #0:1 -> #0:1 (pcm_s16le -> libvo_aacenc)
Press [q] to stop, [?] for help
frame= 1343 fps= 25 q=29.0 Lsize= 2680kB time=00:00:44.70 bitrate= 491.2kbits/s
video:1943kB audio:691kB subtitle:0 global headers:0kB muxing overhead 1.756713%
[libx264 @ 00000000002e1da0] frame I:25 Avg QP:20.44 size: 14523
[libx264 @ 00000000002e1da0] frame P:614 Avg QP:23.20 size: 2319
[libx264 @ 00000000002e1da0] frame B:704 Avg QP:24.59 size: 287
[libx264 @ 00000000002e1da0] consecutive B-frames: 25.6% 11.0% 7.4% 56.0%
[libx264 @ 00000000002e1da0] mb I I16..4: 17.6% 67.0% 15.3%
[libx264 @ 00000000002e1da0] mb P I16..4: 7.6% 9.9% 0.8% P16..4: 28.0% 8.3% 4.0% 0.0% 0.0% skip:41.4%
[libx264 @ 00000000002e1da0] mb B I16..4: 0.4% 0.5% 0.0% B16..8: 16.3% 1.1% 0.1% direct: 0.2% skip:81.4% L0:39.7% L
1:57.4% BI: 2.8%
[libx264 @ 00000000002e1da0] 8x8 transform intra:56.3% inter:85.5%
[libx264 @ 00000000002e1da0] coded y,u,v intra: 35.7% 17.0% 19.1% inter: 7.7% 3.8% 3.4%
[libx264 @ 00000000002e1da0] i16 v,h,dc,p: 26% 28% 17% 30%
[libx264 @ 00000000002e1da0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 21% 33% 4% 4% 5% 4% 4% 4%
[libx264 @ 00000000002e1da0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 21% 16% 5% 6% 9% 6% 6% 6%
[libx264 @ 00000000002e1da0] Weighted P-Frames: Y:6.5% UV:3.3%
[libx264 @ 00000000002e1da0] ref P L0: 56.8% 16.5% 18.2% 8.0% 0.6%
[libx264 @ 00000000002e1da0] ref B L0: 82.3% 14.1% 3.7%
[libx264 @ 00000000002e1da0] ref B L1: 93.7% 6.3%
[libx264 @ 00000000002e1da0] kb/s:355.47Any ideas ?
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ffmpeg concat last image duration incorrect
27 novembre 2019, par SIDUHere is my png.txt file :
file '01.png'
duration 92
file '02.png'
duration 46
file '03.png'
duration 67
file '04.png'
duration 62
file '05.png'
duration 57
file '06.png'
duration 3
file '06.png'mp3 duration = 00:05:28 (total of above)
And here is the line :
ffmpeg -f concat -i png.txt -vsync vfr -i 20170817.mp3 -c:a aac -s 1280x720 -c:v libx264 -pix_fmt yuv420p -shortest 20170817.mp4And here is the output :
ffmpeg version 3.3.2 Copyright (c) 2000-2017 the FFmpeg developers
built with Apple LLVM version 8.1.0 (clang-802.0.42)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.2 --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
libavutil 55. 58.100 / 55. 58.100
libavcodec 57. 89.100 / 57. 89.100
libavformat 57. 71.100 / 57. 71.100
libavdevice 57. 6.100 / 57. 6.100
libavfilter 6. 82.100 / 6. 82.100
libavresample 3. 5. 0 / 3. 5. 0
libswscale 4. 6.100 / 4. 6.100
libswresample 2. 7.100 / 2. 7.100
libpostproc 54. 5.100 / 54. 5.100
Input #0, concat, from 'png.txt':
Duration: 00:05:27.00, start: 0.000000, bitrate: 0 kb/s
Stream #0:0: Video: png, rgba(pc), 1280x720 [SAR 2835:2835 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
Input #1, mp3, from '20170817.mp3':
Metadata:
encoder : Lavf57.71.100
Duration: 00:05:28.10, start: 0.069063, bitrate: 24 kb/s
Stream #1:0: Audio: mp3, 16000 Hz, mono, s16p, 24 kb/s
File '20170817.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
Stream #1:0 -> #0:1 (mp3 (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x7fbe83003000] using SAR=1/1
[libx264 @ 0x7fbe83003000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x7fbe83003000] profile High, level 3.1
[libx264 @ 0x7fbe83003000] 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=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
Output #0, mp4, to '20170817.mp4':
Metadata:
encoder : Lavf57.71.100
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
Metadata:
encoder : Lavc57.89.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 16000 Hz, mono, fltp, 69 kb/s
Metadata:
encoder : Lavc57.89.100 aac
frame= 7 fps=4.2 q=-1.0 Lsize= 3349kB time=00:05:27.04 bitrate= 83.9kbits/s speed= 196x
video:465kB audio:2863kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.644585%
[libx264 @ 0x7fbe83003000] frame I:1 Avg QP: 7.93 size:159157
[libx264 @ 0x7fbe83003000] frame P:2 Avg QP:17.16 size: 61998
[libx264 @ 0x7fbe83003000] frame B:4 Avg QP:18.34 size: 48049
[libx264 @ 0x7fbe83003000] consecutive B-frames: 14.3% 28.6% 0.0% 57.1%
[libx264 @ 0x7fbe83003000] mb I I16..4: 48.6% 21.6% 29.8%
[libx264 @ 0x7fbe83003000] mb P I16..4: 4.4% 9.8% 19.7% P16..4: 11.6% 3.0% 2.6% 0.0% 0.0% skip:48.9%
[libx264 @ 0x7fbe83003000] mb B I16..4: 0.4% 0.5% 13.2% B16..8: 14.9% 3.9% 2.6% direct: 1.1% skip:63.4% L0:45.0% L1:52.1% BI: 3.0%
[libx264 @ 0x7fbe83003000] 8x8 transform intra:19.2% inter:38.3%
[libx264 @ 0x7fbe83003000] coded y,uvDC,uvAC intra: 52.3% 63.3% 62.4% inter: 8.6% 7.7% 6.9%
[libx264 @ 0x7fbe83003000] i16 v,h,dc,p: 88% 9% 3% 0%
[libx264 @ 0x7fbe83003000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 12% 45% 2% 2% 3% 2% 3% 4%
[libx264 @ 0x7fbe83003000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 26% 18% 5% 5% 5% 5% 6% 6%
[libx264 @ 0x7fbe83003000] i8c dc,h,v,p: 55% 18% 20% 8%
[libx264 @ 0x7fbe83003000] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x7fbe83003000] ref P L0: 93.3% 0.3% 3.7% 2.8%
[libx264 @ 0x7fbe83003000] ref B L0: 85.2% 14.8%
[libx264 @ 0x7fbe83003000] ref B L1: 87.8% 12.2%
[libx264 @ 0x7fbe83003000] kb/s:11.52
[aac @ 0x7fbe83004800] Qavg: 1971.172The problem is that the mp4 has 00:06:45 duration, and the music finished at 00:05:28
How do I chop the last silent bit off ?
I tried the following :
ffmpeg -ss 0 -i 20170817.mp4 -to 00:05:28 -c copy cut.mp4Which is worse. Adds blank silent video at front, and chop the video at middle which yet to finish.
Please note the first 5 images are correct at right music positions, only last image duration error
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FFMPEG, H264 Encoding : If frame size exceeds level limit, does it lead to video encoding failed ?
4 février 2021, par Nafia MahjabinI want to reencode an mp4 file with h264 encoding.
Run the following command :




ffmpeg -i input.mp4 -f mp4 -vcodec h264 -profile:v baseline -level 3.0 -pix_fmt yuv420p -color_range 2 -vf scale=1080:1920 -acodec aac -async 1 output.mp4




Process fails saying
Video encoding failed.
Error Message given by ffmpeg :

[h264 @ 0x7a467000] Reinit context to 640x1152, pix_fmt: yuv420p\n
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':\n 
 Metadata:\n 
 major_brand : mp42\n 
 minor_version : 0\n 
 compatible_brands: mp42mp41iso4\n 
 creation_time : 2020-07-26T20:32:55.000000Z\n 
 Duration: 00:00:36.20, start: 0.000000, bitrate: 938 kb/s\n 
 Stream #0:0(und): Video: h264, 1 reference frame (avc1 / 0x31637661), yuv420p(left), 640x1138 (640x1152), 935 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)\n 
 Metadata:\n 
 creation_time : 2020-07-26T20:32:55.000000Z\n 
 handler_name : Vireo Eyes v2.5.3\n 
 encoder : AVC Coding\n
 Matched encoder 'libx264' for codec 'h264'.\n
 Stream mapping:\n 
 Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))\nPress [q] to stop, [?] for help\n
 [Parsed_scale_0 @ 0x80be6220] w:1080 h:1920 flags:'bicubic' interl:0\n
 [graph 0 input from stream 0:0 @ 0x80be6280] w:640 h:1138 pixfmt:yuv420p tb:1/15360 fr:30/1 sar:0/1\n
 [graph 0 input from stream 0:0 @ 0x80be6280] sws_param option is deprecated and ignored\n[Parsed_scale_0 @ 0x80be6220] w:640 h:1138 fmt:yuv420p sar:0/1 -> w:1080 h:1920 fmt:yuv420p sar:0/1 flags:0x4\n
 [libx264 @ 0x7a1d4000] frame MB size (68x120) > level limit (1620)\n
 [libx264 @ 0x7a1d4000] DPB size (1 frames, 8160 mbs) > level limit (0 frames, 8100 mbs)\n
 [libx264 @ 0x7a1d4000] MB rate (244800) > level limit (40500)\n[libx264 @ 0x7a1d4000] using cpu capabilities: ARMv6 NEON\n
 [libx264 @ 0x7a1d4000] profile Constrained Baseline, level 3.0, 4:2:0, 8-bit\n[libx264 @ 0x7a1d4000] 264 - core 160 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 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\n
 Output #0, mp4, to 'output.mp4':\n 
 Metadata:\n 
 major_brand : mp42\n 
 minor_version : 0\n 
 compatible_brands: mp42mp41iso4\n 
 encoder : Lavf58.48.100\n 
 Stream #0:0(und): Video: h264 (libx264), 1 reference frame (avc1 / 0x31637661), yuv420p(pc, left), 1080x1920, q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)\n
 Metadata:\n 
 creation_time : 2020-07-26T20:32:55.000000Z\n 
 handler_name : Vireo Eyes v2.5.3\n 
 encoder : Lavc58.96.100 libx264\n 
 Side data:\n 
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A\n
 frame= 3 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x \n
 frame= 7 fps=6.2 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x \n
 frame= 11 fps=6.2 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x \n
 frame= 15 fps=6.3 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x \n
 frame= 19 fps=6.3 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x \n
 frame= 23 fps=6.3 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x \n
 frame= 26 fps=6.2 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x \n
 frame= 30 fps=6.2 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x \n
 frame= 33 fps=6.2 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x \n
 Video encoding failed\n[AVIOContext @ 0x7a42cd80] Statistics: 0 seeks, 1 writeouts\n
 [AVIOContext @ 0x7a42ccc0] Statistics: 229376 bytes read, 0 seeks\nConversion failed!\n\n\n\n\n


I tried to figure out the reason for fail. I'm guessing from error message from the line
frame MB size (68x120) > level limit (1620), frame size exceeds h264 level limits may be the issue.

Is it the issue ? if it is, what's the solution for this ? if it's not, what went wrong ?


Can somebody help please ? Thank you !


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