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Collections - Formulaire de création rapide
19 février 2013, par
Mis à jour : Février 2013
Langue : français
Type : Image
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Les Miserables
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Mis à jour : Février 2013
Langue : English
Type : Texte
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Ne pas afficher certaines informations : page d’accueil
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Mis à jour : Novembre 2011
Langue : français
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The Great Big Beautiful Tomorrow
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Richard Stallman et la révolution du logiciel libre - Une biographie autorisée (version epub)
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Mis à jour : Octobre 2011
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Rennes Emotion Map 2010-11
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Autres articles (78)
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Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
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 (...) -
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Sur d’autres sites (6578)
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Video Created By FFMPEG is Blank [on hold]
11 octobre 2015, par Larry HolzeNew to FFMPEG and trying to use it very simplistically. I have a sequence of images that I want to make into a video. Using this command :
ffmpeg -framerate 30 -i "fr_%05d.jpg" out.mp4
Creates the
out.mp4
file OK, but when I play it back it is just blank.
Pictures in the.jpg
sequence are definitely not blank.Am I missing some option(s) ?
Command window output :
ffmpeg version N-74700-g628a73f Copyright (c) 2000-2015 the FFmpeg developers
Built with gcc 4.9.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
--enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
ble-decklink --enable-zlib
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 59.100 / 56. 59.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 39.100 / 5. 39.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Input #0, image2, from 'fr_%05d.jpg':
Duration: 00:00:30.03, start: 0.000000, bitrate: N/A
Stream #0:0: Video: mjpeg, gray(bt470bg/unknown/unknown), 300x200 [SAR 90:90
DAR 3:2], 30 fps, 30 tbr, 30 tbn, 30 tbc
[swscaler @ 0000000002f88c60] deprecated pixel format used, make sure you did se
t range correctly
No pixel format specified, yuvj444p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 000000000589b0c0] using SAR=1/1
[libx264 @ 000000000589b0c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
AVX
[libx264 @ 000000000589b0c0] profile High 4:4:4 Predictive, level 1.3, 4:4:4 8-b
it
[libx264 @ 000000000589b0c0] 264 - core 148 r2597 e86f3a1 - H.264/MPEG-4 AVC cod
ec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 r
ef=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_pski
p=1 chroma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decim
ate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_a
dapt=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 'out.mp4':
Metadata:
encoder : Lavf56.40.101
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuvj444p(pc), 3
00x200 [SAR 1:1 DAR 3:2], q=-1--1, 30 fps, 15360 tbn, 30 tbc
Metadata:
encoder : Lavc56.59.100 libx264
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
Press [q] to stop, [?] for help
Input stream #0:0 frame changed from size:300x200 fmt:gray to size:300x200 fmt:y
uvj444p
Input stream #0:0 frame changed from size:300x200 fmt:yuvj444p to size:300x200 f
mt:gray
[swscaler @ 00000000095b75c0] deprecated pixel format used, make sure you did se
t range correctly
Input stream #0:0 frame changed from size:300x200 fmt:gray to size:300x200 fmt:y
uvj444p
Input stream #0:0 frame changed from size:300x200 fmt:yuvj444p to size:300x200 f
mt:gray
[swscaler @ 00000000095b75c0] deprecated pixel format used, make sure you did se
t range correctly
Input stream #0:0 frame changed from size:300x200 fmt:gray to size:300x200 fmt:y
uvj444p
frame= 244 fps=0.0 q=29.0 size= 15kB time=00:00:06.40 bitrate= 19.6kbits/
Input stream #0:0 frame changed from size:300x200 fmt:yuvj444p to size:300x200 f
mt:gray
[swscaler @ 00000000095b75c0] deprecated pixel format used, make sure you did se
t range correctly
Input stream #0:0 frame changed from size:300x200 fmt:gray to size:300x200 fmt:y
uvj444p
frame= 325 fps=316 q=29.0 size= 23kB time=00:00:09.10 bitrate= 20.4kbits/
frame= 382 fps=247 q=29.0 size= 34kB time=00:00:11.00 bitrate= 25.1kbits/
frame= 417 fps=203 q=29.0 size= 36kB time=00:00:12.16 bitrate= 24.5kbits/
frame= 482 fps=187 q=29.0 size= 38kB time=00:00:14.33 bitrate= 21.7kbits/
frame= 541 fps=175 q=29.0 size= 39kB time=00:00:16.30 bitrate= 19.8kbits/
frame= 611 fps=170 q=29.0 size= 41kB time=00:00:18.63 bitrate= 18.1kbits/
frame= 881 fps=214 q=29.0 size= 54kB time=00:00:27.63 bitrate= 15.9kbits/
frame= 901 fps=214 q=-1.0 Lsize= 66kB time=00:00:29.96 bitrate= 18.1kbits
/s
video:55kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing ov
erhead: 20.648893%
[libx264 @ 000000000589b0c0] frame I:8 Avg QP:18.01 size: 2331
[libx264 @ 000000000589b0c0] frame P:239 Avg QP:22.95 size: 91
[libx264 @ 000000000589b0c0] frame B:654 Avg QP:33.33 size: 23
[libx264 @ 000000000589b0c0] consecutive B-frames: 2.9% 0.7% 1.0% 95.4%
[libx264 @ 000000000589b0c0] mb I I16..4: 36.6% 53.8% 9.6%
[libx264 @ 000000000589b0c0] mb P I16..4: 0.1% 0.4% 0.2% P16..4: 0.6% 0.0
% 0.0% 0.0% 0.0% skip:98.6%
[libx264 @ 000000000589b0c0] mb B I16..4: 0.0% 0.9% 0.0% B16..8: 1.7% 0.0
% 0.0% direct: 0.0% skip:97.4% L0:55.9% L1:44.1% BI: 0.0%
[libx264 @ 000000000589b0c0] 8x8 transform intra:70.8% inter:12.0%
[libx264 @ 000000000589b0c0] coded y,u,v intra: 5.9% 4.9% 5.0% inter: 0.0% 0.0%
0.0%
[libx264 @ 000000000589b0c0] i16 v,h,dc,p: 54% 46% 0% 0%
[libx264 @ 000000000589b0c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 5% 83% 0% 0%
0% 0% 0% 0%
[libx264 @ 000000000589b0c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 47% 15% 10% 4% 6%
5% 4% 4% 4%
[libx264 @ 000000000589b0c0] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 000000000589b0c0] ref P L0: 47.6% 2.6% 44.9% 5.0%
[libx264 @ 000000000589b0c0] ref B L0: 55.9% 40.1% 4.0%
[libx264 @ 000000000589b0c0] ref B L1: 93.3% 6.7%
[libx264 @ -
FFMpeg is dropping video track when clipping an mpg video
16 juin 2017, par M. GrishaberI am extracting a clip from an mpg video using the following command.
ffmpeg.exe -i 271b.mpg -ss 00:00:05.000 -t 00:00:03.200 -c copy out_271b.mpgI am using the copy parameter to avoid reencoding the clip.
The resulting mpg file only has the audio track, no video.
The following is the FFMpeg screen dump.C:\ffmpeg-20170615\bin>ffmpeg.exe -i 271b.mpg -ss 00:00:05.000 -t 00:00:03.200 -c copy out_271b.mpg
ffmpeg version N-86482-gbc40674 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 7.1.0 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --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-zlib
libavutil 55. 66.100 / 55. 66.100
libavcodec 57. 99.100 / 57. 99.100
libavformat 57. 73.100 / 57. 73.100
libavdevice 57. 7.100 / 57. 7.100
libavfilter 6. 92.100 / 6. 92.100
libswscale 4. 7.101 / 4. 7.101
libswresample 2. 8.100 / 2. 8.100
libpostproc 54. 6.100 / 54. 6.100
Input #0, mpeg, from '271b.mpg':
Duration: 00:01:11.44, start: 0.460000, bitrate: 2154 kb/s
Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg, progressive), 640x480 [SAR 1:1 DAR 4:3], 2000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, mono, s16p, 128 kb/s
[mpeg @ 0000000000666aa0] VBV buffer size not set, using default size of 130KB
If you want the mpeg file to be compliant to some specification
Like DVD, VCD or others, make sure you set the correct buffer size
Output #0, mpeg, to 'out_271b.mpg':
Metadata:
encoder : Lavf57.73.100
Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, bt470bg, progressive), 640x480 [SAR 1:1 DAR 4:3], q=2-31, 2000 kb/s, 25 fps, 25 tbr, 90k tbn, 25 tbc
Stream #0:1: Audio: mp2, 44100 Hz, mono, s16p, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 74 fps=0.0 q=-1.0 Lsize= 786kB time=00:00:03.17 bitrate=2027.2kbits/s speed= 198x
video:730kB audio:50kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.843343%Thanks
Addition : I tried to open the generated clip file with ffplay and got the following results. Note that ffplay was able to open and play the original mpg file.
ffplay.exe out_271b.mpg
ffplay version N-86482-gbc40674 Copyright (c) 2003-2017 the FFmpeg developers
built with gcc 7.1.0 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --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-zlib
libavutil 55. 66.100 / 55. 66.100
libavcodec 57. 99.100 / 57. 99.100
libavformat 57. 73.100 / 57. 73.100
libavdevice 57. 7.100 / 57. 7.100
libavfilter 6. 92.100 / 6. 92.100
libswscale 4. 7.101 / 4. 7.101
libswresample 2. 8.100 / 2. 8.100
libpostproc 54. 6.100 / 54. 6.100
[mpeg @ 00000000023cde80] probed stream 2 failedB sq= 0B f=0/0
[mpeg @ 00000000023cde80] start time for stream 0 is not set in estimate_timings_from_pts
[mpeg @ 00000000023cde80] Could not find codec parameters for stream 2 (Video: none, none): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mpeg, from 'out_271bb.mpg':
Duration: 00:00:03.22, start: 0.500000, bitrate: 2068 kb/s
Stream #0:0[0x1bf]: Data: dvd_nav_packet 0KB sq= 0B f=0/0
Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, mono, s16p, 128 kb/s
Stream #0:2[0x1e0]: Video: none, none, 25 fps, 25 tbr, 90k tbn
SDL_OpenAudio (1 channels, 44100 Hz): DirectSoundCreate: No audio device found
No more combinations to try, audio open failed
No codec could be found with id 0
Failed to open file 'out_271b.mpg' or configure filtergraph -
ffmpeg : how to correctly program input framerate calculation, given desired video length duration and output framerate ?
19 septembre 2015, par user89Let us say that I have
n
pictures named asimgXY.png
(whereXY
represent the numbers0
ton-1
, properly padded with zeros).From these, I would like to create a video that is
t
seconds long, that has an (output) framerateR
.I want to figure out what the input framerate should be, so I do the following calculation :
-
time spent per frame :
t_per_frame = t/n
-
input framerate :
1/t_per_frame = n/t
However, when I then try to create a movie using the following command :
ffmpeg -framerate n/t -i img%02d.png -r 30 test_output.mp4
I don’t get a movie that is
t
seconds long, and only two of the frames end up getting displayed. Why is this the case ?The following questions were unhelpful :
How to successfully use ffmpeg to convert images into videos
Turning images into videos with ffmpeg
I think I am misunderstanding what is meant by input framerate, and what is meant by output framerate. Could you help clarify ? I am using a Python script to call ffmpeg, as documented here : http://zulko.github.io/blog/2013/09/27/read-and-write-video-frames-in-python-using-ffmpeg/
Here’s the output from the following manually executed command :
ffmpeg -framerate 24/5 -i img%02d.png -c:v libx264 -r 30 -pix_fmt yuv420p test_output.mp4
ffmpeg version N-75204-g314bc20 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.9.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
--enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
ble-decklink --enable-opencl --enable-zlib
libavutil 55. 2.100 / 55. 2.100
libavcodec 57. 1.100 / 57. 1.100
libavformat 57. 0.100 / 57. 0.100
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 1.100 / 6. 1.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.100 / 2. 0.100
libpostproc 54. 0.100 / 54. 0.100
Input #0, image2, from 'img%02d.png':
Duration: 00:00:00.42, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, rgb24(pc), 800x400, 4.80 tbr, 4.80 tbn, 4.80 tbc
File 'test_output.mp4' already exists. Overwrite ? [y/N] y
[libx264 @ 0000000004f16ba0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0000000004f16ba0] profile High, level 3.0
[libx264 @ 0000000004f16ba0] 264 - core 148 r2597 e86f3a1 - H.264/MPEG-4 AVC cod
ec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 r
ef=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_pski
p=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 dec
imate=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 'test_output.mp4':
Metadata:
encoder : Lavf57.0.100
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 800x40
0, q=-1--1, 30 fps, 15360 tbn, 30 tbc
Metadata:
encoder : Lavc57.1.100 libx264
Stream mapping:
Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
Press [q] to stop, [?] for help
frame= 12 fps=0.0 q=-1.0 Lsize= 3kB time=00:00:00.33 bitrate= 62.2kbits
/s dup=10 drop=0
video:2kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing ove
rhead: 60.557274%
[libx264 @ 0000000004f16ba0] frame I:1 Avg QP:10.12 size: 566
[libx264 @ 0000000004f16ba0] frame P:3 Avg QP:18.10 size: 62
[libx264 @ 0000000004f16ba0] frame B:8 Avg QP:13.75 size: 22
[libx264 @ 0000000004f16ba0] consecutive B-frames: 8.3% 0.0% 25.0% 66.7%
[libx264 @ 0000000004f16ba0] mb I I16..4: 99.4% 0.0% 0.6%
[libx264 @ 0000000004f16ba0] mb P I16..4: 0.0% 0.0% 0.0% P16..4: 0.0% 0.0
% 0.0% 0.0% 0.0% skip:99.9%
[libx264 @ 0000000004f16ba0] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 0.1% 0.0
% 0.0% direct: 0.0% skip:99.9% L0:37.5% L1:62.5% BI: 0.0%
[libx264 @ 0000000004f16ba0] 8x8 transform intra:0.0% inter:0.0%
[libx264 @ 0000000004f16ba0] coded y,uvDC,uvAC intra: 0.6% 0.0% 0.0% inter: 0.0%
0.0% 0.0%
[libx264 @ 0000000004f16ba0] i16 v,h,dc,p: 96% 0% 4% 0%
[libx264 @ 0000000004f16ba0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 18% 36% 2% 2%
3% 3% 5% 1%
[libx264 @ 0000000004f16ba0] i8c dc,h,v,p: 100% 0% 0% 0%
[libx264 @ 0000000004f16ba0] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0000000004f16ba0] ref P L0: 50.0% 50.0%
[libx264 @ 0000000004f16ba0] kb/s:18.50 -