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Médias (2)
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SPIP - plugins - embed code - Exemple
2 septembre 2013, par
Mis à jour : Septembre 2013
Langue : français
Type : Image
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Publier une image simplement
13 avril 2011, par ,
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (13)
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Submit bugs and patches
13 avril 2011Unfortunately a software is never perfect.
If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
You may also (...) -
Qualité du média après traitement
21 juin 2013, parLe bon réglage du logiciel qui traite les média est important pour un équilibre entre les partis ( bande passante de l’hébergeur, qualité du média pour le rédacteur et le visiteur, accessibilité pour le visiteur ). Comment régler la qualité de son média ?
Plus la qualité du média est importante, plus la bande passante sera utilisée. Le visiteur avec une connexion internet à petit débit devra attendre plus longtemps. Inversement plus, la qualité du média est pauvre et donc le média devient dégradé voire (...) -
Qu’est ce qu’un masque de formulaire
13 juin 2013, parUn masque de formulaire consiste en la personnalisation du formulaire de mise en ligne des médias, rubriques, actualités, éditoriaux et liens vers des sites.
Chaque formulaire de publication d’objet peut donc être personnalisé.
Pour accéder à la personnalisation des champs de formulaires, il est nécessaire d’aller dans l’administration de votre MediaSPIP puis de sélectionner "Configuration des masques de formulaires".
Sélectionnez ensuite le formulaire à modifier en cliquant sur sont type d’objet. (...)
Sur d’autres sites (4741)
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how to use a video stream as input in python/opencv programme
11 juillet 2016, par vasu guptaI am able to stream and receive webcam feed in two terminal via udp
command for streaming :
ffmpeg -i /dev/video0 -b 50k -r 20 -s 858x500 -f mpegts udp://127.0.0.1:2000
command for recieving :
ffplay udp://127.0.0.1:2000
Now i have to use this received video stream as input in python/opencv how can i do that.
I will be doing this using rtp and rstp as well.
But in case of rtsp it is essential to initiate the receiving terminal, but if I do that then port will become busy and my program will not be able to take the feed.How could it be resolved.
I am currently using opencv 2.4.13, python 2.7 in ubuntu 14.04 -
Using FFmpeg to encode 2pass mp4
30 juin 2016, par Erin.YangI am trying to use FFmpeg to encode my 4K mp4 file to a 2pass 265 mp4 file for the purposes of testing. I am new to video compression and hope I’m making a simple mistake that someone can correct.
All infos in command line as below :
C:\Ying\FF>C:\Ying\FF\ffmpeg.exe -y -i C:\Ying\FF\Xman-4K_50sec_3840x2160.mp4 -preset veryslow -x265-params pass=1 -vcodec hevc -b:v 15M -acodec libvo
_aacenc -b:a 128K C:\Ying\FF\Xman-4K_3840x2160_50sec_15M_H265_veryslow_2pass.mp4
ffmpeg version N-74286-ge5774f2 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.9.3 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontco
nfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-l
ibfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-am
rwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-lib
twolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --en
able-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
libavutil 54. 30.100 / 54. 30.100
libavcodec 56. 57.100 / 56. 57.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 32.100 / 5. 32.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Ying\FF\Xman-4K_50sec_3840x2160.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : X-MEN__DAYS_OF_FUTURE_PAST.Title800
encoder : Lavf56.40.101
Duration: 00:00:50.01, start: 0.000000, bitrate: 11067 kb/s
Chapter #0:0: start 0.000000, end 50.000000
Metadata:
title : (26)01:17:27:726
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 3840x2160 [SAR 1:1 DAR 16:9], 11492 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (de
fault)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream #0:2(eng): Subtitle: mov_text (text / 0x74786574), 0 kb/s
Metadata:
handler_name : SubtitleHandler
x265 [info]: HEVC encoder version 1.7
x265 [info]: build info [Windows][GCC 4.9.2][64 bit] 8bpp
x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
x265 [info]: Main profile, Level-5 (Main tier)
x265 [info]: Thread pool created using 32 threads
x265 [info]: frame threads / pool features : 8 / wpp(34 rows)
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 3 inter / 3 intra
x265 [info]: ME / range / subpel / merge : dia / 57 / 2 / 1
x265 [info]: Keyframe min / max / scenecut : 25 / 250 / 40
x265 [info]: Lookahead / bframes / badapt : 40 / 8 / 2
x265 [info]: b-pyramid / weightp / weightb / refs: 1 / 1 / 1 / 1
x265 [info]: AQ: mode / str / qg-size / cu-tree : 1 / 1.0 / 64 / 1
x265 [info]: Rate Control / qCompress : ABR-15000 kbps / 0.60
x265 [info]: tools: rd=2 psy-rd=0.30 rdoq=2 psy-rdoq=1.00 early-skip signhide
x265 [info]: tools: tmvp b-intra fast-intra strong-intra-smoothing deblock sao
x265 [info]: tools: stats-write
Output #0, mp4, to 'C:\Ying\FF\Xman-4K_3840x2160_50sec_15M_H265_veryslow_2pass.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : X-MEN__DAYS_OF_FUTURE_PAST.Title800
encoder : Lavf56.40.101
Chapter #0:0: start 0.000000, end 50.000000
Metadata:
title : (26)01:17:27:726
Stream #0:0(und): Video: hevc (libx265) ([35][0][0][0] / 0x0023), yuv420p, 3840x2160 [SAR 1:1 DAR 16:9], q=2-31, 15000 kb/s, 30 fps, 15360 tbn, 30
tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc56.57.100 libx265
Stream #0:1(und): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc56.57.100 libvo_aacenc
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
Stream #0:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
Press [q] to stop, [?] for help
frame= 1502 fps=2.6 q=-0.0 Lsize= 100652kB time=00:00:50.01 bitrate=16485.9kbits/s dup=75 drop=0
video:99814kB audio:782kB subtitle:0kB other streams:0kB global headers:1kB muxing overhead: 0.054657%
x265 [info]: frame I: 11, Avg QP:13.26 kb/s: 59293.48
x265 [info]: frame P: 443, Avg QP:15.21 kb/s: 33977.10
x265 [info]: frame B: 1048, Avg QP:18.35 kb/s: 8420.64
x265 [info]: global : 1502, Avg QP:17.39 kb/s: 16330.84
x265 [info]: Weighted P-Frames: Y:4.5% UV:4.5%
x265 [info]: Weighted B-Frames: Y:1.9% UV:1.6%
x265 [info]: consecutive B-frames: 23.8% 11.9% 14.8% 22.9% 17.8% 7.0% 0.0% 0.0% 1.8%
C:\Ying\FF>C:\Ying\FF\ffmpeg.exe -y -i C:\Ying\FF\Xman-4K_50sec_3840x2160.mp4 -preset veryslow -x265-params pass=2 -vcodec hevc -b:v 15M -acodec libvo
_aacenc -b:a 128K C:\Ying\FF\Xman-4K_3840x2160_50sec_15M_H265_veryslow_2pass.mp4
ffmpeg version N-74286-ge5774f2 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.9.3 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontco
nfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-l
ibfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-am
rwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-lib
twolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --en
able-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
libavutil 54. 30.100 / 54. 30.100
libavcodec 56. 57.100 / 56. 57.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 32.100 / 5. 32.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Ying\FF\Xman-4K_50sec_3840x2160.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : X-MEN__DAYS_OF_FUTURE_PAST.Title800
encoder : Lavf56.40.101
Duration: 00:00:50.01, start: 0.000000, bitrate: 11067 kb/s
Chapter #0:0: start 0.000000, end 50.000000
Metadata:
title : (26)01:17:27:726
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 3840x2160 [SAR 1:1 DAR 16:9], 11492 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (de
fault)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream #0:2(eng): Subtitle: mov_text (text / 0x74786574), 0 kb/s
Metadata:
handler_name : SubtitleHandler
x265 [info]: HEVC encoder version 1.7
x265 [info]: build info [Windows][GCC 4.9.2][64 bit] 8bpp
x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
x265 [info]: Main profile, Level-6 (Main tier)
x265 [info]: Thread pool created using 32 threads
x265 [info]: frame threads / pool features : 8 / wpp(34 rows)
x265 [error]: statistics are damaged at line 1495, parser out=1
[libx265 @ 0000000001e97d00] Cannot open libx265 encoder.
Output #0, mp4, to 'C:\Ying\FF\Xman-4K_3840x2160_50sec_15M_H265_veryslow_2pass.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : X-MEN__DAYS_OF_FUTURE_PAST.Title800
encoder : Lavf56.40.101
Chapter #0:0: start 0.000000, end 50.000000
Metadata:
title : (26)01:17:27:726
Stream #0:0(und): Video: hevc, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 30 fps (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc56.57.100 libx265
Stream #0:1(und): Audio: aac, 0 channels, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc56.57.100 libvo_aacenc
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
Stream #0:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or heightMediaInfo :
General
Complete name : E:\4K\2ndRound\Xman-4K_50sec_3840x2160.mp4.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 66.0 MiB
Duration : 50s 6ms
Overall bit rate : 11.1 Mbps
Movie name : X-MEN__DAYS_OF_FUTURE_PAST.Title800
Writing application : Lavf56.40.101
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 47s 567ms
Bit rate : 11.5 Mbps
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.046
Stream size : 65.2 MiB (99%)
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 50s 6ms
Bit rate mode : Constant
Bit rate : 128 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 781 KiB (1%)
Menu #1
ID : 3
Codec ID : text
Duration : 50s 0ms
Language : English
Menu #2
00:00:00.000 : (26)01:17:27:726
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reading video mpegts stream from stdin using libavformat libavcodec
1er février 2012, par D StarkweatherI'm trying to read video frames from stdin using ffmpeg's libav* lib collection. Simply passing "pipe:0" or "pipe :" as the filename to avformat_open_input_file() in my program does not do the trick. (e.g. cat /dev/video0 | ./myprogram OR ./myprogram < /dev/video0 ; it also fails using file.avi in place of /dev/video0).
Peeking into ffmpeg.c, I find the following bit of code using tcsetattr() to set the termios :
struct termios tty;
if (tcgetattr (0, &tty) == 0) {
oldtty = tty;
restore_tty = 1;
atexit(term_exit);
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
|INLCR|IGNCR|ICRNL|IXON);
tty.c_oflag |= OPOST;
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
tty.c_cflag &= ~(CSIZE|PARENB);
tty.c_cflag |= CS8;
tty.c_cc[VMIN] = 1;
tty.c_cc[VTIME] = 0;
tcsetattr (0, TCSANOW, &tty);
}
signal(SIGQUIT, sigterm_handler); /* Quit (POSIX). */
}
avformat_network_deinit();
signal(SIGINT , sigterm_handler); /* Interrupt (ANSI). */
signal(SIGTERM, sigterm_handler); /* Termination (ANSI). */
signal(SIGXCPU, sigterm_handler);However, when I try this, it appears to have no effect. What settings do I need in the termios struct to continuously read video frames in ?
Currently, all i am able to do is call av_read_frames a few times (return code 0) before it usually either segfaults or hangs waiting. The buffer usually contains just a blank screen (all black). With any luck, the video buffer will contain the first video frame it comes across, but does not update to the later frames.
(I'm running this on Debian 6.0) Here's my version of ffmpeg :
ffmpeg version N-36936-g4cf81d9 Copyright (c) 2000-2012 the FFmpeg
developers built on Jan 19 2012 20:51:47 with gcc 4.4.5
configuration : —enable-shared —enable-gray —enable-hardcoded-tables
—enable-runtime-cpudetect —enable-libmp3lame —enable-libopenjpeg —enable-librtmp —enable-libtheora —enable-libvorbis —enable-libx264 —enable-libxvid —enable-zlib —enable-gpl libavutil 51. 34.101 / 51. 34.101 libavcodec 53. 57.100 /
53. 57.100 libavformat 53. 30.100 / 53. 30.100 libavdevice 53. 4.100 / 53. 4.100 libavfilter 2. 59.101 / 2. 59.101 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 6.100 /
0. 6.100 libpostproc 52. 0.100 / 52. 0.100 Hyper fast Audio and Video encoder usage : ffmpeg [options] [[infile options] -i
infile].Thank you very much for any help helpful tips. It is much appreciated.
D. Grant Starkweather