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Médias (1)
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Sintel MP4 Surround 5.1 Full
13 mai 2011, par
Mis à jour : Février 2012
Langue : English
Type : Video
Autres articles (111)
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MediaSPIP Player : les contrôles
26 mai 2010, parLes contrôles à la souris du lecteur
En plus des actions au click sur les boutons visibles de l’interface du lecteur, il est également possible d’effectuer d’autres actions grâce à la souris : Click : en cliquant sur la vidéo ou sur le logo du son, celui ci se mettra en lecture ou en pause en fonction de son état actuel ; Molette (roulement) : en plaçant la souris sur l’espace utilisé par le média (hover), la molette de la souris n’exerce plus l’effet habituel de scroll de la page, mais diminue ou (...) -
Script d’installation automatique de MediaSPIP
25 avril 2011, parAfin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
Vous devez bénéficier d’un accès SSH à votre serveur et d’un compte "root" afin de l’utiliser, ce qui permettra d’installer les dépendances. Contactez votre hébergeur si vous ne disposez pas de cela.
La documentation de l’utilisation du script d’installation (...) -
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.
Sur d’autres sites (14012)
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How to compress webcam videos recorded by html5 MediaRecorder api ?
19 mai 2017, par JasonYI successfully recorded my webcam using MediaRecorder api and the resulting filesizes seemed far too big for their quality.
For example, for an 8 second video that was 480x640 I got a 1mB file size. That does not seem right.
My code to record()
navigator.mediaDevices.getUserMedia({video: true, audio: true})
.then(function(stream){
var options = {
mimeType : "video/webm;codecs=vp9"
//I don't set bitrate here even if I do the quality is too bad
}
var media_recorder = new MediaRecorder(media_stream, options);
var recorded_data = [];
media_recorder.ondataavailable = function(e){
recorded_data.push(e.data);
}
media_recorder.onstop = function(e){
recorded_data.push(e.data);
var recorded_blob = new Blob(recorded_data, { 'type' : 'video/webm; codecs=vp9' });
var recorded_video_url = window.URL.createObjectURL(recorded_blob);
//here I write some code to download the blob from this url through a href
}
})The file obtained by this method is unreasonably large which makes me wonder if it was even compressed when encoded by VP9 ? A 7 second video is about 870kB !
Inspecting the file with a mediainfo tool gives me
General
Count : 323
Count of stream of this kind : 1
Kind of stream : General
Kind of stream : General
Stream identifier : 0
Count of video streams : 1
Count of audio streams : 1
Video_Format_List : VP9
Video_Format_WithHint_List : VP9
Codecs Video : V_VP9
Video_Language_List : English
Audio_Format_List : Opus
Audio_Format_WithHint_List : Opus
Audio codecs : Opus
Audio_Language_List : English
Complete name : recorded_video.webm
File name : recorded_video
File extension : webm
Format : WebM
Format : WebM
Format/Url : http://www.webmproject.org/
Format/Extensions usually used : webm
Commercial name : WebM
Format version : Version 2
Internet media type : video/webm
Codec : WebM
Codec : WebM
Codec/Url : http://www.webmproject.org/
Codec/Extensions usually used : webm
File size : 867870
File size : 848 KiB
File size : 848 KiB
File size : 848 KiB
File size : 848 KiB
File size : 847.5 KiB
File last modification date : UTC 2017-05-19 05:48:00
File last modification date (local) : 2017-05-19 17:48:00
Writing application : Chrome
Writing application : Chrome
Writing library : Chrome
Writing library : Chrome
IsTruncated : Yes
Video
Count : 332
Count of stream of this kind : 1
Kind of stream : Video
Kind of stream : Video
Stream identifier : 0
StreamOrder : 1
ID : 2
ID : 2
Unique ID : 62101435245162993
Format : VP9
Commercial name : VP9
Codec ID : V_VP9
Codec ID/Url : http://www.webmproject.org/
Codec : V_VP9
Codec : V_VP9
Width : 640
Width : 640 pixels
Height : 480
Height : 480 pixels
Pixel aspect ratio : 1.000
Display aspect ratio : 1.333
Display aspect ratio : 4:3
Frame rate mode : VFR
Frame rate mode : Variable
Language : en
Language : English
Language : English
Language : en
Language : eng
Language : en
Default : Yes
Default : Yes
Forced : No
Forced : No
Audio
Count : 272
Count of stream of this kind : 1
Kind of stream : Audio
Kind of stream : Audio
Stream identifier : 0
StreamOrder : 0
ID : 1
ID : 1
Unique ID : 32224324715799545
Format : Opus
Format/Url : http://opus-codec.org/
Commercial name : Opus
Internet media type : audio/opus
Codec ID : A_OPUS
Codec ID/Url : http://opus-codec.org
Codec : Opus
Codec : Opus
Codec/Family : PCM
Channel(s) : 1
Channel(s) : 1 channel
Channel positions : Front: C
Channel positions : 1/0/0
Sampling rate : 48000
Sampling rate : 48.0 KHz
Compression mode : Lossy
Compression mode : Lossy
Delay : 718
Delay : 718ms
Delay : 718ms
Delay : 718ms
Delay : 00:00:00.718
Delay, origin : Container
Delay, origin : Container
Language : en
Language : English
Language : English
Language : en
Language : eng
Language : en
Default : Yes
Default : Yes
Forced : No
Forced : NoWhat did I do wrong ? Do I have to re-encode it after the chunks get appended ? Is there some attribute I’m missing ? VP9 is supposed to reduce file sizes drastically.
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Unable to play recorded video and audio using ffmpeg
11 janvier 2021, par Vijay RakeshI’m trying to generate a video and audio for every 40ms in a separate files and sending it to the cloud for a live stream, but created videos and audio’s are unable to play using ffplay.


Command :




ffmpeg -f alsa -thread_queue_size 1024 -i hw:0 -f video4linux2 -i
/dev/video0 -c:a aac -ar 48k -t 0:10 -segment_time 00:00.04 -f segment
sample-%003d.aac -c:v h264 -force_key_frames
"expr:gte(t,n_forced*0.04)" -pix_fmt yuv420p -s:v 640x480 -t 0:10 -r
25 -g 1 -segment_time 00:00.04 -f segment frame-%003d.h264




Error :




frame-001.h264 : Invalid data found when processing input.




Console output :




configuration : —prefix=/usr —extra-version=0ubuntu0.2
—toolchain=hardened —libdir=/usr/lib/x86_64-linux-gnu —incdir=/usr/include/x86_64-linux-gnu —enable-gpl —disable-stripping —enable-avresample —enable-avisynth —enable-gnutls —enable-ladspa —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —enable-libcdio —enable-libflite —enable-libfontconfig —enable-libfreetype —enable-libfribidi —enable-libgme —enable-libgsm —enable-libmp3lame —enable-libmysofa —enable-libopenjpeg —enable-libopenmpt —enable-libopus —enable-libpulse —enable-librubberband —enable-librsvg —enable-libshine —enable-libsnappy —enable-libsoxr —enable-libspeex —enable-libssh —enable-libtheora —enable-libtwolame —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx265 —enable-libxml2 —enable-libxvid —enable-libzmq —enable-libzvbi —enable-omx —enable-openal —enable-opengl —enable-sdl2 —enable-libdc1394 —enable-libdrm —enable-libiec61883 —enable-chromaprint —enable-frei0r —enable-libopencv —enable-libx264 —enable-shared libavutil 55. 78.100 / 55. 78.100 libavcodec 57.107.100 /
57.107.100 libavformat 57. 83.100 / 57. 83.100 libavdevice 57. 10.100 / 57. 10.100 libavfilter 6.107.100 / 6.107.100 libavresample 3. 7. 0 / 3. 7. 0 libswscale 4. 8.100 /
4. 8.100 libswresample 2. 9.100 / 2. 9.100 libpostproc 54. 7.100 / 54. 7.100 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, alsa, from 'hw:0' : Duration : N/A, start :
1610338632.931406, bitrate : 1536 kb/s
Stream #0:0 : Audio : pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Input #1, video4linux2,v4l2, from '/dev/video0' : Duration : N/A,
start : 3405.427360, bitrate : 147456 kb/s
Stream #1:0 : Video : rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, 147456 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc Stream
mapping : Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (native))

Stream #1:0 -> #1:0 (rawvideo (native) -> h264 (libx264)) Press [q] to
stop, [?] for help [alsa @ 0x55777d96fe00] ALSA buffer xrun. [segment
@ 0x55777d983d80] Opening 'sample-000.aac' for writing Output #0,
segment, to 'sample-%003d.aac' : Metadata :
encoder : Lavf57.83.100
Stream #0:0 : Audio : aac (LC), 48000 Hz, stereo, fltp, 128 kb/s
Metadata :
encoder : Lavc57.107.100 aac [libx264 @ 0x55777d98fa20] using cpu capabilities : MMX2 SSE2Fast SSSE3 SSE4.2 [libx264 @
0x55777d98fa20] profile High, level 3.0 [libx264 @ 0x55777d98fa20] 264

- 

- core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options : cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00
mixed_ref=0 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=0 weightp=0 keyint=1
keyint_min=1 scenecut=40 intra_refresh=0 rc=crf mbtree=0 crf=23.0
qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 [segment
@ 0x55777d98dda0] Opening 'frame-000.h264' for writing Output #1,
segment, to 'frame-%003d.h264' : Metadata :
encoder : Lavf57.83.100
Stream #1:0 : Video : h264 (libx264), yuv420p, 640x480, q=-1—1, 25 fps, 25 tbn, 25 tbc
Metadata :
encoder : Lavc57.107.100 libx264
Side data :
cpb : bitrate max/min/avg : 0/0/0 buffer size : 0 vbv_delay : -1 [segment @ 0x55777d983d80] Opening 'sample-001.aac' for writing
[segment @ 0x55777d98dda0] Opening 'frame-001.h264' for writing
[segment @ 0x55777d98dda0] Opening 'frame-002.h264' for writing
[segment @ 0x55777d98dda0] Opening 'frame-003.h264' for writing
[segment @ 0x55777d98dda0] Opening 'frame-004.h264' for writing
[segment @ 0x55777d98dda0] Opening 'frame-005.h264' for writing
[segment @ 0x55777d98dda0] Opening 'frame-006.h264' for writingA dup=1
drop=0 speed=1.07x ... [segment @ 0x55777d98dda0] Opening
'frame-018.h264' for writingA dup=5 drop=0 speed=0.714x ...

[segment @ 0x55777d98dda0] Opening 'frame-029.h264' for writingA
dup=12 drop=0 speed=0.768x ... [segment @ 0x55777d98dda0] Opening
'frame-042.h264' for writingA dup=21 drop=0 speed=0.834x ...
[segment @ 0x55777d983d80] Opening 'sample-055.aac' for writingA
dup=31 drop=0 speed=0.89x ... [segment @ 0x55777d98dda0] Opening
'frame-067.h264' for writingA dup=39 drop=0 speed=0.887x ...
[segment @ 0x55777d98dda0] Opening 'frame-081.h264' for writingA
dup=49 drop=0 speed=0.92x ... [segment @ 0x55777d98dda0] Opening
'frame-091.h264' for writingA dup=56 drop=0 speed=0.904x ...
[segment @ 0x55777d98dda0] Opening 'frame-105.h264' for writingA
dup=66 drop=0 speed=0.927x ... [segment @ 0x55777d98dda0] Opening
'frame-119.h264' for writingA dup=76 drop=0 speed=0.944x ...
[segment @ 0x55777d98dda0] Opening 'frame-130.h264' for writingA
dup=84 drop=0 speed=0.938x ... [segment @ 0x55777d98dda0] Opening
'frame-144.h264' for writingA dup=94 drop=0 speed=0.952x ...
[segment @ 0x55777d983d80] Opening 'sample-154.aac' for writingA
dup=103 drop=0 speed=0.958x ... [segment @ 0x55777d98dda0] Opening
'frame-168.h264' for writingA dup=111 drop=0 speed=0.952x ...
[segment @ 0x55777d98dda0] Opening 'frame-182.h264' for writingA
dup=121 drop=0 speed=0.962x ... [segment @ 0x55777d98dda0] Opening
'frame-193.h264' for writingA dup=129 drop=0 speed=0.956x ...
[segment @ 0x55777d98dda0] Opening 'frame-207.h264' for writingA
dup=139 drop=0 speed=0.965x ... [segment @ 0x55777d983d80] Opening
'sample-218.aac' for writingA dup=149 drop=0 speed=0.974x ...
[segment @ 0x55777d98dda0] Opening 'frame-231.h264' for writingA
dup=156 drop=0 speed=0.964x ... [segment @ 0x55777d98dda0] Opening
'frame-249.h264' for writing frame= 250 fps= 24 q=-1.0 Lsize=N/A
time=00:00:10.00 bitrate=N/A dup=168 drop=0 speed=0.98x

video:2707kB audio:149kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead : unknown [aac @ 0x55777d98cf00] Qavg :
260.500 [libx264 @ 0x55777d98fa20] frame I:250 Avg QP:26.77 size : 11085 [libx264 @ 0x55777d98fa20] mb I I16..4 : 13.4% 72.3% 14.3%
[libx264 @ 0x55777d98fa20] 8x8 transform intra:72.3% [libx264 @
0x55777d98fa20] coded y,uvDC,uvAC intra : 54.2% 91.6% 64.5% [libx264 @
0x55777d98fa20] i16 v,h,dc,p : 13% 18% 6% 62% [libx264 @
0x55777d98fa20] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu : 19% 18% 16% 6% 7% 6%
12% 5% 10% [libx264 @ 0x55777d98fa20] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu :
28% 18% 11% 6% 8% 8% 10% 5% 6% [libx264 @ 0x55777d98fa20] i8c
dc,h,v,p : 58% 20% 15% 7% [libx264 @ 0x55777d98fa20] kb/s:2216.90






- core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options : cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00
mixed_ref=0 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=0 weightp=0 keyint=1
keyint_min=1 scenecut=40 intra_refresh=0 rc=crf mbtree=0 crf=23.0
qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 [segment
@ 0x55777d98dda0] Opening 'frame-000.h264' for writing Output #1,
segment, to 'frame-%003d.h264' : Metadata :
encoder : Lavf57.83.100
Stream #1:0 : Video : h264 (libx264), yuv420p, 640x480, q=-1—1, 25 fps, 25 tbn, 25 tbc
Metadata :
encoder : Lavc57.107.100 libx264
Side data :
cpb : bitrate max/min/avg : 0/0/0 buffer size : 0 vbv_delay : -1 [segment @ 0x55777d983d80] Opening 'sample-001.aac' for writing
[segment @ 0x55777d98dda0] Opening 'frame-001.h264' for writing
[segment @ 0x55777d98dda0] Opening 'frame-002.h264' for writing
[segment @ 0x55777d98dda0] Opening 'frame-003.h264' for writing
[segment @ 0x55777d98dda0] Opening 'frame-004.h264' for writing
[segment @ 0x55777d98dda0] Opening 'frame-005.h264' for writing
[segment @ 0x55777d98dda0] Opening 'frame-006.h264' for writingA dup=1
drop=0 speed=1.07x ... [segment @ 0x55777d98dda0] Opening
'frame-018.h264' for writingA dup=5 drop=0 speed=0.714x ...
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I have a series of images recorded by a webcam with unstable frame rate at about 22 fps. Did ffmpeg interpolate these image into other fps ? [closed]
13 septembre 2020, par yangze68I have a series of images and its recorded timestamps. Their real fps is about 22 and it's unstable. If I use the FFmpeg to encode it into a 30fps video, do these really change the fps and interpolate image at an interval of 1/30 per second ? or Just arrange those images in the interval of 1/30 and decrease the total duration time ?


my command :
ffmpeg -framerate 30 -i img%03d.png output.mp4