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Autres articles (99)

MediaSPIP 0.1 Beta version

25 avril 2011, par kent1

MediaSPIP 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, par kent1

Multilang 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, par kent1

Chaque 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 (...)

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ... | 33

Sur d’autres sites (7540)

FFmpeg : "filter_complex" results in worse quality than "vf"

16 novembre 2016, par Dasmowenator

I’m trying to use FFmpeg to do some complex video transcoding (such as concatenating multiple files). To do this, I’ve been trying to use the filter_complex, but I’ve noticed a slight drop in quality from what I saw earlier using the normal video filter.

To double-check, I boiled down my command to a simple transcode — one using filter_complex and one just using the vf — and I’ve confirmed that the output of the complex filter is noticeably blurry compared to the output of the normal video filter. I can’t find any FFmpeg documentation explaining this... does anyone know why this is happening and how I can get filter_complex to output the same quality video as vf ?

Command using the normal video filter (vf) :

ffmpeg -i input.ts -map_chapters -1 -f mpegts -an -sn -map 0:0 -vf "[in]yadif=deint=interlaced[out]" -vcodec libx264 -profile:v baseline -level 2 -b:v 800k output.ts

FFmpeg Output :

ffmpeg version 3.0 Copyright (c) 2000-2016 the FFmpeg developers

  built with gcc 4.1.2 (GCC) 20070626 (Red Hat 4.1.2-14)

  configuration: --enable-gpl --enable-nonfree --enable-libx264 --enable-libfdk-aac --enable-libfaac --enable-libvpx --enable-encoder=vorbis --enable-libvorbis --enable-libmp3lame --enable-libspeex --disable-decoder=prores --disable-decoder=prores_lgpl --disable-ffplay --disable-ffserver --disable-shared --enable-static --extra-cflags=-I/local/build/include --extra-libs=-lfdk-aac --extra-ldflags=-L/local/build/lib --prefix=/local/build/install

  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 'clip01.mp4':

  Metadata:

    major_brand     : isom

    minor_version   : 512

    compatible_brands: isomiso2avc1mp41

    encoder         : Lavf57.41.100

  Duration: 00:00:10.02, start: 0.023220, bitrate: 741 kb/s

    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 854x480 [SAR 1:1 DAR 427:240], 604 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)

    Metadata:

      handler_name    : VideoHandler

    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)

    Metadata:

      handler_name    : SoundHandler

[libx264 @ 0x138a99e0] No 608/708 caption insertion into sei user data.

[libx264 @ 0x138a99e0] using SAR=1/1

[libx264 @ 0x138a99e0] frame MB size (54x30) > level limit (396)

[libx264 @ 0x138a99e0] MB rate (48600) > level limit (11880)

[libx264 @ 0x138a99e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64

[libx264 @ 0x138a99e0] profile Constrained Baseline, level 2.0

Output #0, mpegts, to 'output.ts':

  Metadata:

    major_brand     : isom

    minor_version   : 512

    compatible_brands: isomiso2avc1mp41

    encoder         : Lavf57.25.100

    Stream #0:0(und): Video: h264 (libx264), yuv420p, 854x480 [SAR 1:1 DAR 427:240], q=-1--1, 800 kb/s, 30 fps, 90k tbn, 30 tbc (default)

    Metadata:

      handler_name    : VideoHandler

      encoder         : Lavc57.24.102 libx264

    Side data:

      unknown side data type 10 (24 bytes)

Stream mapping:

  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))

Press [q] to stop, [?] for help

frame=  300 fps=179 q=-1.0 Lsize=    1059kB time=00:00:10.03 bitrate= 864.9kbits/s speed=   6x    

video:949kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 11.660099%

[libx264 @ 0x138a99e0] frame I:2     Avg QP:23.16  size: 26978

[libx264 @ 0x138a99e0] frame P:298   Avg QP:23.09  size:  3079

[libx264 @ 0x138a99e0] mb I  I16..4: 44.3%  0.0% 55.7%

[libx264 @ 0x138a99e0] mb P  I16..4:  1.1%  0.0%  0.5%  P16..4: 28.7%  8.4%  2.1%  0.0%  0.0%    skip:59.3%

[libx264 @ 0x138a99e0] final ratefactor: 22.63

[libx264 @ 0x138a99e0] coded y,uvDC,uvAC intra: 30.8% 62.8% 23.0% inter: 7.2% 14.8% 0.3%

[libx264 @ 0x138a99e0] i16 v,h,dc,p: 25% 39% 11% 24%

[libx264 @ 0x138a99e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 29% 16%  5%  6%  7%  6%  4%  5%

[libx264 @ 0x138a99e0] i8c dc,h,v,p: 45% 29% 18%  8%

[libx264 @ 0x138a99e0] kb/s:777.19

Command using the complex filter :

ffmpeg -i input.ts -map_chapters -1 -f mpegts -filter_complex "[0:v:0]yadif=deint=interlaced[v0];[v0]concat=n=1:v=1:a=0[cat_v]" -an -sn -map "[cat_v]" -vcodec libx264 -profile:v baseline -level 2 -b:v 800k output.ts

FFmpeg Output :

ffmpeg version 3.0 Copyright (c) 2000-2016 the FFmpeg developers

  built with gcc 4.1.2 (GCC) 20070626 (Red Hat 4.1.2-14)

  configuration: --enable-gpl --enable-nonfree --enable-libx264 --enable-libfdk-aac --enable-libfaac --enable-libvpx --enable-encoder=vorbis --enable-libvorbis --enable-libmp3lame --enable-libspeex --disable-decoder=prores --disable-decoder=prores_lgpl --disable-ffplay --disable-ffserver --disable-shared --enable-static --extra-cflags=-I/local/build/include --extra-libs=-lfdk-aac --extra-ldflags=-L/local/build/lib --prefix=/local/build/install

  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 'clip01.mp4':

  Metadata:

    major_brand     : isom

    minor_version   : 512

    compatible_brands: isomiso2avc1mp41

    encoder         : Lavf57.41.100

  Duration: 00:00:10.02, start: 0.023220, bitrate: 741 kb/s

    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 854x480 [SAR 1:1 DAR 427:240], 604 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)

    Metadata:

      handler_name    : VideoHandler

    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)

    Metadata:

      handler_name    : SoundHandler

[libx264 @ 0x81f5200] No 608/708 caption insertion into sei user data.

[libx264 @ 0x81f5200] using SAR=1/1

[libx264 @ 0x81f5200] frame MB size (54x30) > level limit (396)

[libx264 @ 0x81f5200] MB rate (48600) > level limit (11880)

[libx264 @ 0x81f5200] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64

[libx264 @ 0x81f5200] profile Constrained Baseline, level 2.0

Output #0, mpegts, to 'output.ts':

  Metadata:

    major_brand     : isom

    minor_version   : 512

    compatible_brands: isomiso2avc1mp41

    encoder         : Lavf57.25.100

    Stream #0:0: Video: h264 (libx264), yuv420p, 854x480 [SAR 1:1 DAR 427:240], q=-1--1, 800 kb/s, 30 fps, 90k tbn, 30 tbc (default)

    Metadata:

      encoder         : Lavc57.24.102 libx264

    Side data:

      unknown side data type 10 (24 bytes)

Stream mapping:

  Stream #0:0 (h264) -> yadif

  concat -> Stream #0:0 (libx264)

Press [q] to stop, [?] for help

frame=  300 fps=179 q=-1.0 Lsize=    1059kB time=00:00:10.03 bitrate= 864.9kbits/s speed=   6x    

video:949kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 11.660099%

[libx264 @ 0x81f5200] frame I:2     Avg QP:23.16  size: 26978

[libx264 @ 0x81f5200] frame P:298   Avg QP:23.09  size:  3079

[libx264 @ 0x81f5200] mb I  I16..4: 44.3%  0.0% 55.7%

[libx264 @ 0x81f5200] mb P  I16..4:  1.1%  0.0%  0.5%  P16..4: 28.7%  8.4%  2.1%  0.0%  0.0%    skip:59.3%

[libx264 @ 0x81f5200] final ratefactor: 22.63

[libx264 @ 0x81f5200] coded y,uvDC,uvAC intra: 30.8% 62.8% 23.0% inter: 7.2% 14.8% 0.3%

[libx264 @ 0x81f5200] i16 v,h,dc,p: 25% 39% 11% 24%

[libx264 @ 0x81f5200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 29% 16%  5%  6%  7%  6%  4%  5%

[libx264 @ 0x81f5200] i8c dc,h,v,p: 45% 29% 18%  8%

[libx264 @ 0x81f5200] kb/s:777.19

capture DV video and audio with ffmpeg and dshow

18 novembre 2016, par andrixnet

Trying to capture video and audio from a DV camera, using ffmpeg, I got into a problem.
Before anything, I first tried to see (and hear) with ffplay.

ffmpeg version :

ffplay version 3.0 Copyright (c) 2003-2016 the FFmpeg developers

  built with gcc 5.3.0 (GCC)

  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib

  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

Getting list of DirectShow devices :
ffplay -hide_banner -f dshow -list_devices true -i dummy

[dshow @ 035c4240] DirectShow video devices (some may be both video and audio devices)

[dshow @ 035c4240]  "Microsoft DV Camera and VCR" sq=    0B f=0/0

[dshow @ 035c4240]     Alternative name "@device_pnp_\\?\avc#canon&amp;mvx3i&amp;camcorder&amp;dv#5126800000850000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"

[dshow @ 035c4240] DirectShow audio devices

[dshow @ 035c4240]  "1-ESI MAYA44 Ch12"

[dshow @ 035c4240]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\1-ESI MAYA44 Ch12"

[dshow @ 035c4240]  "2-ESI MAYA44 Ch34"

[dshow @ 035c4240]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\2-ESI MAYA44 Ch34"

[dshow @ 035c4240]  "3-ESI MAYA44 Ch1234"

[dshow @ 035c4240]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\3-ESI MAYA44 Ch1234"

[dshow @ 035c4240]  "Realtek HD Audio Input"

[dshow @ 035c4240]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Realtek HD Audio Input"

[dshow @ 035c4240]  "Realtek HD Digital input"

[dshow @ 035c4240]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Realtek HD Digital input"

dummy: Immediate exit requested

I can use VLC with "Capture device" as input, selecting "Microsoft DV Camera and VCR" as video device and leaving "Default" as audio device and I get both video and audio.

With ffmpeg I get only video stream, no audio.

C:\>ffplay -hide_banner -f dshow -i video="Microsoft DV Camera and VCR"

Input #0, dshow, from 'video=Microsoft DV Camera and VCR':B f=0/0

  Duration: N/A, start: 0.010035, bitrate: N/A

    Stream #0:0: Video: dvvideo (dvsd / 0x64737664), yuv420p, 720x576 [SAR 16:15

 DAR 4:3], 25 tbr, 10000k tbn, 25 tbc

   0.48 M-V:  0.013 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0

I don’t know how to tell ffmpeg the equivalent of "Default" audio device as VLC recognizes it.

Device options show there are 2 pins for video device (DV device has both video and audio) but how can I tell ffmpeg such that it captures both video and audio ?

C:\>ffplay -hide_banner -f dshow -list_options true -i video="Microsoft DV Camera and VCR"

[dshow @ 035c3260] DirectShow video device options (from video devices)

[dshow @ 035c3260]  Pin "DV Vid Out" (alternative pin name "0")

[dshow @ 035c3260]   vcodec=dvvideo  min s=720x480 fps=29.97 max s=720x480 fps=2

9.97

[dshow @ 035c3260]   vcodec=dvvideo  min s=720x576 fps=25 max s=720x576 fps=25

[dshow @ 035c3260]   vcodec=dvvideo  min s=720x480 fps=29.97 max s=720x480 fps=2

9.97

[dshow @ 035c3260]   vcodec=dvvideo  min s=720x576 fps=25 max s=720x576 fps=25

[dshow @ 035c3260]   vcodec=dvvideo  min s=720x480 fps=29.97 max s=720x480 fps=2

9.97

[dshow @ 035c3260]   vcodec=dvvideo  min s=720x576 fps=25 max s=720x576 fps=25

[dshow @ 035c3260]  Pin "DV A/V Out" (alternative pin name "1")

video=Microsoft DV Camera and VCR: Immediate exit requested f=0/0

Thank you.

ffmpeg throwing "Output file #0 does not contain any stream" when trying to make a slideshow out of images

25 novembre 2016, par Abdou Tahiri

Im trying to create video streaming using phantomjs that create screenshots from a url then it will pipe the frames to ffmpeg so he can use it to stream the video to an rtmp url .
here is what i tried so far :

phantomjs runner.js | ffmpeg -f image2pipe  -vcodec png -c:a copy -c:v libx264  -f flv rtmp://localhost/mystream

and here is the script :

var page = require('webpage').create();

page.viewportSize = { width: 640, height: 480 };



page.open('http://www.goodboydigital.com/pixijs/examples/12-2/', function () {

  setInterval(function() {

    page.render('/dev/stdout', { format: "png" });

  }, 25);

});

and this is the output :

ffmpeg version 3.0.2 Copyright (c) 2000-2016 the FFmpeg developers

  built with Apple LLVM version 7.3.0 (clang-703.0.29)

  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.0.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid --enable-vda

  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

  libavresample   3.  0.  0 /  3.  0.  0

  libswscale      4.  0.100 /  4.  0.100

  libswresample   2.  0.101 /  2.  0.101

  libpostproc    54.  0.100 / 54.  0.100

Output #0, flv, to 'rtmp://localhost/mystream':

Output file #0 does not contain any stream

1 | ... | 2281 | 2282 | 2283 | 2284 | 2285 | 2286 | 2287 | 2288 | 2289 | ... | 2514

Recherche avancée

Médias (0)

Autres articles (99)

MediaSPIP 0.1 Beta version

Multilang : améliorer l’interface pour les blocs multilingues

Le profil des utilisateurs

Sur d’autres sites (7540)

FFmpeg : "filter_complex" results in worse quality than "vf"

capture DV video and audio with ffmpeg and dshow

ffmpeg throwing "Output file #0 does not contain any stream" when trying to make a slideshow out of images

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