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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (33)
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ANNEXE : Les plugins utilisés spécifiquement pour la ferme
5 mars 2010, parLe site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)
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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
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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 (...)
Sur d’autres sites (3707)
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ffmpeg2theora oggfwd not working with icecast2
6 décembre 2011, par achillesI have a camera streaming (mjpeg) in http://192.168.x.x/image (where x are the rest of the IP). I start my icecast2 server (Ubuntu 10.10) and then I stream using :
ffmpeg2theora -f mjpeg http://192.168.x.x/image -o /dev/stdout - | oggfwd localhost 8000 password /testThe mountpoint is created but the video is not showing on Firefox. I do see the video box but it's just infinitely showing the "thinking" icon and video does not show.
If I download a proper ogg file and do
cat proper_ogg_file.ogg | oggfwd localhost 8000 password /testI see the video on the icecast server's website.
In addition I did :
ffmpeg2theora -f mjpeg http://192.168.x.x/image -o test_video.oggOnce I stop the process (CTRL+C) and go to my Desktop where the video is saved and open it with VLC or any other media player, it plays the portion of the stream that I allowed to be recorded all the way up to pressing CTRL+C.
If I take that file and use the previous method :
cat test_video.ogg | oggfwd localhost 8000 password /testI get the same issue as when I was directly piping the camera to stdout and then to oggfwd. So therefore I assume this is a "conversion" to ogg issue ? Can anybody help ? Any idea why i can't do that ?
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How to reduce size of moov atom of H.264 movies to improve streaming start for smartphones ?
14 avril 2013, par alebedevWe run a video service streaming movies to smartphones (iOS&Android).
We are encoding in H.264+AAC and using the mp4 container.
We have a problem that long movies (60 minutes+) take a very long time to
start playing and have tracked this down to the large size of moov
atom for these movies.
For 110 minute movies the atom is as large as 4.2Mb which obviously takes a long
time to download to a smart-phone over 3G !Is there anyway to make the moov atom smaller ? We can reduce it bit
by dropping the audio sampling rate, but obviously anything below 22kHz
would not really be acceptable.We are using ffmpeg as the encoder, and MP4Box to move the metadata
to the front of the file. Is there any way to get it to make
a smaller moov ? Any other encoders out there which make a smaller moov ?For example...
Big size (280 Mb, 1h 49min) streamable mp4 (h.264, AAC) file have a big header size (4.2 Mb). File was encoded by two pass ffmpeg and MP4Box for replacing metadata into beginning of the file :
/usr/bin/ffmpeg -i /var/lib/encoder/incoming/2388 -aspect 320:210 -threads 8 -vcodec libx264 -profile baseline -level 13 -flags +loop+mv4 -cmp 256 -partitions +parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 -me_method hex -subq 7 -trellis 1 -refs 5 -bf 0 -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -qmin 10 -qmax 51 -qdiff 4 -b:v 270k -maxrate 270k -bufsize 270k -g 30 -passlogfile /tmp/mediaservice/3100/video-IPH.ffmpeg -an -f rawvideo -pass 1 -y /dev/null
/usr/bin/ffmpeg -i /var/lib/encoder/incoming/2388 -aspect 320:210 -threads 8 -vcodec libx264 -profile baseline -level 13 -flags +loop+mv4 -cmp 256 -partitions +parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 -me_method hex -subq 7 -trellis 1 -refs 5 -bf 0 -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -qmin 10 -qmax 51 -qdiff 4 -b:v 270k -maxrate 270k -bufsize 270k -g 30 -passlogfile /tmp/mediaservice/3100/video-IPH.ffmpeg -acodec libfaac -ac 2 -b:a 32k -ar 44100 -f mp4 -pass 2 -y /var/lib/encoder/encoded/3100/video-IPH.mp4
/usr/bin/MP4Box -quiet -tmp /tmp/mediaservice/3100/ -inter 500 /var/lib/encoder/encoded/3100/video-IPH.mp4Media info (audio sample rate = 44100) :
General
Count : 278
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 : AVC
Video_Format_WithHint_List : AVC
Codecs Video : AVC
Audio_Format_List : AAC
Audio_Format_WithHint_List : AAC
Audio codecs : AAC LC
Complete name : 1348645218_970458_2465.iph.mp4
File name : 1348645218_970458_2465.iph.mp4
File extension : mp4
Format : MPEG-4
Format : MPEG-4
Format/Extensions usually used : mp4 m4v m4a m4b m4p 3gpp 3gp 3gpp2 3g2 k3g jpm jpx mqv ismv isma f4v
Commercial name : MPEG-4
Format profile : Base Media
Internet media type : video/mp4
Codec ID : isom
Codec ID/Url : http://www.apple.com/quicktime/download/standalone.html
Codec : MPEG-4
Codec : MPEG-4
Codec/Extensions usually used : mp4 m4v m4a m4b m4p 3gpp 3gp 3gpp2 3g2 k3g jpm jpx mqv ismv isma f4v
File size : 272703970
File size : 260 MiB
File size : 260 MiB
File size : 260 MiB
File size : 260 MiB
File size : 260.1 MiB
Duration : 6556027
Duration : 1h 49mn
Duration : 1h 49mn 16s 27ms
Duration : 1h 49mn
Duration : 01:49:16.027
Overall bit rate : 332767
Overall bit rate : 333 Kbps
Stream size : 4230761
Stream size : 4.03 MiB (2%)
Stream size : 4 MiB
Stream size : 4.0 MiB
Stream size : 4.03 MiB
Stream size : 4.035 MiB
Stream size : 4.03 MiB (2%)
Proportion of this stream : 0.01551
HeaderSize : 4230683
DataSize : 268473217
FooterSize : 70
IsStreamable : Yes
File last modification date : UTC 2012-09-26 12:38:19
File last modification date (local) : 2012-09-26 21:38:19
Writing application : Lavf54.6.100
Video
Count : 201
Count of stream of this kind : 1
Kind of stream : Video
Kind of stream : Video
Stream identifier : 0
ID : 1
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format/Url : http://developers.videolan.org/x264.html
Commercial name : AVC
Format profile : Baseline@L1.3
Format settings : 5 Ref Frames
Format settings, CABAC : No
Format settings, CABAC : No
Format settings, ReFrames : 5
Format settings, ReFrames : 5 frames
Format settings, GOP : M=1, N=30
Internet media type : video/H264
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Codec ID/Url : http://www.apple.com/quicktime/download/standalone.html
Codec : AVC
Codec : AVC
Codec/Family : AVC
Codec/Info : Advanced Video Codec
Codec/Url : http://developers.videolan.org/x264.html
Codec/CC : avc1
Codec profile : Baseline@L1.3
Codec settings : 5 Ref Frames
Codec settings, CABAC : No
Codec_Settings_RefFrames : 5
Duration : 6556017
Duration : 01:49:16.017
Bit rate : 270000
Bit rate : 270 Kbps
Width : 480
Width : 480 pixels
Height : 270
Height : 270 pixels
Pixel aspect ratio : 1.000
Display aspect ratio : 1.778
Display aspect ratio : 16:9
Rotation : 0.000
Frame rate mode : CFR
Frame rate mode : Constant
FrameRate_Mode_Original : VFR
Frame rate : 29.970
Frame rate : 29.970 fps
Frame count : 196484
Resolution : 8
Resolution : 8 bits
Colorimetry : 4:2:0
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8
Bit depth : 8 bits
Scan type : Progressive
Scan type : Progressive
Interlacement : PPF
Interlacement : Progressive
Bits/(Pixel*Frame) : 0.070
Stream size : 220159060
Stream size : 210 MiB (81%)
Stream size : 210 MiB
Stream size : 210 MiB
Stream size : 210 MiB
Stream size : 210.0 MiB
Stream size : 210 MiB (81%)
Proportion of this stream : 0.80732
Writing library : x264 - core 125
Writing library : x264 core 125
Writing library/Name : x264
Writing library/Version : core 125
Encoding settings : cabac=0 / ref=5 / deblock=1:0:0 / analyse=0x1:0x131 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=8 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=30 / keyint_min=16 / scenecut=40 / intra_refresh=0 / rc_lookahead=30 / rc=2pass / mbtree=1 / bitrate=270 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=270 / vbv_bufsize=270 / nal_hrd=none / ip_ratio=1.40 / aq=1:1.00
Tagged date : UTC 2012-09-25 07:21:37
Audio
Count : 169
Count of stream of this kind : 1
Kind of stream : Audio
Kind of stream : Audio
Stream identifier : 0
ID : 2
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Commercial name : AAC
Format profile : LC
Codec ID : 40
Codec : AAC LC
Codec : AAC LC
Codec/Family : AAC
Codec/CC : 40
Duration : 6556027
Duration : 1h 49mn
Duration : 1h 49mn 16s 27ms
Duration : 1h 49mn
Duration : 01:49:16.027
Bit rate mode : VBR
Bit rate mode : Variable
Bit rate : 58955
Bit rate : 59.0 Kbps
Maximum bit rate : 270000
Maximum bit rate : 270 Kbps
Channel(s) : 2
Channel(s) : 2 channels
Channel positions : Front: L R
Channel positions : 2/0/0
Sampling rate : 44100
Sampling rate : 44.1 KHz
Samples count : 289120791
Compression mode : Lossy
Compression mode : Lossy
Stream size : 48314149
Stream size : 46.1 MiB (18%)
Stream size : 46 MiB
Stream size : 46 MiB
Stream size : 46.1 MiB
Stream size : 46.08 MiB
Stream size : 46.1 MiB (18%)
Proportion of this stream : 0.17717
Tagged date : UTC 2012-09-25 07:21:37Moov atom info (/moov/trak[0] - video, /moov/trak[1] - audio) sample rate 44100 :
(look stsz and stts nodes in trak)Atom ftyp @ 0 of size: 32, ends @ 32
Atom moov @ 32 of size: 4230651, ends @ 4230683
Atom mvhd @ 40 of size: 108, ends @ 148
Atom trak @ 148 of size: 868970, ends @ 869118
Atom tkhd @ 156 of size: 92, ends @ 248
Atom edts @ 248 of size: 36, ends @ 284
Atom elst @ 256 of size: 28, ends @ 284
Atom mdia @ 284 of size: 868834, ends @ 869118
Atom mdhd @ 292 of size: 32, ends @ 324
Atom hdlr @ 324 of size: 45, ends @ 369
Atom minf @ 369 of size: 868749, ends @ 869118
Atom vmhd @ 377 of size: 20, ends @ 397
Atom dinf @ 397 of size: 36, ends @ 433
Atom dref @ 405 of size: 28, ends @ 433
Atom stbl @ 433 of size: 868685, ends @ 869118
Atom stsd @ 441 of size: 149, ends @ 590
Atom avc1 @ 457 of size: 133, ends @ 590
Atom avcC @ 543 of size: 47, ends @ 590
Atom stts @ 590 of size: 24, ends @ 614
Atom stss @ 614 of size: 26340, ends @ 26954
Atom stsc @ 26954 of size: 52, ends @ 27006
Atom stsz @ 27006 of size: 785956, ends @ 812962
Atom stco @ 812962 of size: 56156, ends @ 869118
Atom trak @ 869118 of size: 3361468, ends @ 4230586
Atom tkhd @ 869126 of size: 92, ends @ 869218
Atom edts @ 869218 of size: 36, ends @ 869254
Atom elst @ 869226 of size: 28, ends @ 869254
Atom mdia @ 869254 of size: 3361332, ends @ 4230586
Atom mdhd @ 869262 of size: 32, ends @ 869294
Atom hdlr @ 869294 of size: 45, ends @ 869339
Atom minf @ 869339 of size: 3361247, ends @ 4230586
Atom smhd @ 869347 of size: 16, ends @ 869363
Atom dinf @ 869363 of size: 36, ends @ 869399
Atom dref @ 869371 of size: 28, ends @ 869399
Atom stbl @ 869399 of size: 3361187, ends @ 4230586
Atom stsd @ 869407 of size: 91, ends @ 869498
Atom mp4a @ 869423 of size: 75, ends @ 869498
Atom esds @ 869459 of size: 39, ends @ 869498
**Atom stts @ 869498 of size: 2135816, ends @ 3005314**
Atom stsc @ 3005314 of size: 39712, ends @ 3045026
**Atom stsz @ 3045026 of size: 1129400, ends @ 4174426**
Atom stco @ 4174426 of size: 56160, ends @ 4230586
Atom udta @ 4230586 of size: 97, ends @ 4230683
Atom meta @ 4230594 of size: 89, ends @ 4230683
Atom hdlr @ 4230606 of size: 33, ends @ 4230639
Atom ilst @ 4230639 of size: 44, ends @ 4230683
Atom ©too @ 4230647 of size: 36, ends @ 4230683
Atom data @ 4230655 of size: 28, ends @ 4230683
Atom mdat @ 4230683 of size: 268473217, ends @ 272703900
Atom free @ 272703900 of size: 8, ends @ 272703908
Atom free @ 272703908 of size: 62, ends @ 272703970
------------------------------------------------------
Total size: 272703970 bytes; 50 atoms total. AtomicParsley version: 0.9.0 (utf8)
Media data: 268473217 bytes; 4230753 bytes all other atoms (1.551% atom overhead).
Total free atom space: 70 bytes; 0.000% waste. Padding available: 0 bytes.
------------------------------------------------------After reencoding this movie with audio sample rate 11025 header size much less :
Media info (audio sample rate = 11025) : (crop duplicate info)
General
***
HeaderSize : 1276359
Video
***
Audio
Count : 169
Count of stream of this kind : 1
Kind of stream : Audio
Kind of stream : Audio
Stream identifier : 0
ID : 2
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Commercial name : AAC
Format profile : LC
Codec ID : 40
Codec : AAC LC
Codec : AAC LC
Codec/Family : AAC
Codec/CC : 40
Duration : 6556132
Duration : 1h 49mn
Duration : 1h 49mn 16s 132ms
Duration : 1h 49mn
Duration : 01:49:16.132
Bit rate mode : VBR
Bit rate mode : Variable
Bit rate : 37991
Bit rate : 38.0 Kbps
Maximum bit rate : 128000
Maximum bit rate : 128 Kbps
Channel(s) : 2
Channel(s) : 2 channels
Channel positions : Front: L R
Channel positions : 2/0/0
Sampling rate : 11025
Sampling rate : 11.025 KHz
Samples count : 72281355
Compression mode : Lossy
Compression mode : Lossy
Stream size : 31134257
Stream size : 29.7 MiB (12%)
Stream size : 30 MiB
Stream size : 30 MiB
Stream size : 29.7 MiB
Stream size : 29.69 MiB
Stream size : 29.7 MiB (12%)
Proportion of this stream : 0.12327
Tagged date : UTC 2012-09-25 13:20:28Moov atom info (/moov/trak[0] - video, /moov/trak[1] - audio) sample rate 11025 :
Atom ftyp @ 0 of size: 32, ends @ 32
Atom moov @ 32 of size: 1276327, ends @ 1276359
Atom mvhd @ 40 of size: 108, ends @ 148
Atom trak @ 148 of size: 821662, ends @ 821810
Atom tkhd @ 156 of size: 92, ends @ 248
Atom edts @ 248 of size: 36, ends @ 284
Atom elst @ 256 of size: 28, ends @ 284
Atom mdia @ 284 of size: 821526, ends @ 821810
Atom mdhd @ 292 of size: 32, ends @ 324
Atom hdlr @ 324 of size: 45, ends @ 369
Atom minf @ 369 of size: 821441, ends @ 821810
Atom vmhd @ 377 of size: 20, ends @ 397
Atom dinf @ 397 of size: 36, ends @ 433
Atom dref @ 405 of size: 28, ends @ 433
Atom stbl @ 433 of size: 821377, ends @ 821810
Atom stsd @ 441 of size: 149, ends @ 590
Atom avc1 @ 457 of size: 133, ends @ 590
Atom avcC @ 543 of size: 47, ends @ 590
Atom stts @ 590 of size: 24, ends @ 614
Atom stss @ 614 of size: 26340, ends @ 26954
Atom stsc @ 26954 of size: 52, ends @ 27006
Atom stsz @ 27006 of size: 785956, ends @ 812962
Atom stco @ 812962 of size: 8848, ends @ 821810
Atom trak @ 821810 of size: 454452, ends @ 1276262
Atom tkhd @ 821818 of size: 92, ends @ 821910
Atom edts @ 821910 of size: 36, ends @ 821946
Atom elst @ 821918 of size: 28, ends @ 821946
Atom mdia @ 821946 of size: 454316, ends @ 1276262
Atom mdhd @ 821954 of size: 32, ends @ 821986
Atom hdlr @ 821986 of size: 45, ends @ 822031
Atom minf @ 822031 of size: 454231, ends @ 1276262
Atom smhd @ 822039 of size: 16, ends @ 822055
Atom dinf @ 822055 of size: 36, ends @ 822091
Atom dref @ 822063 of size: 28, ends @ 822091
Atom stbl @ 822091 of size: 454171, ends @ 1276262
Atom stsd @ 822099 of size: 91, ends @ 822190
Atom mp4a @ 822115 of size: 75, ends @ 822190
Atom esds @ 822151 of size: 39, ends @ 822190
Atom stts @ 822190 of size: 161368, ends @ 983558
Atom stsc @ 983558 of size: 1480, ends @ 985038
Atom stsz @ 985038 of size: 282372, ends @ 1267410
Atom stco @ 1267410 of size: 8852, ends @ 1276262
Atom udta @ 1276262 of size: 97, ends @ 1276359
Atom meta @ 1276270 of size: 89, ends @ 1276359
Atom hdlr @ 1276282 of size: 33, ends @ 1276315
Atom ilst @ 1276315 of size: 44, ends @ 1276359
Atom ©too @ 1276323 of size: 36, ends @ 1276359
Atom data @ 1276331 of size: 28, ends @ 1276359
Atom mdat @ 1276359 of size: 251293325, ends @ 252569684
Atom free @ 252569684 of size: 8, ends @ 252569692
Atom free @ 252569692 of size: 62, ends @ 252569754
------------------------------------------------------
Total size: 252569754 bytes; 50 atoms total. AtomicParsley version: 0.9.0 (utf8)
Media data: 251293325 bytes; 1276429 bytes all other atoms (0.505% atom overhead).
Total free atom space: 70 bytes; 0.000% waste. Padding available: 0 bytes.
------------------------------------------------------On slow connection this movie start playing after 30-40 seconds until header info (4.2 Mb) downloading. I need that movie start playing fast as it possible. And i have next questions :
-
How reduce size of movie header ?
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How reduce size of
/moov[0]/trak[1]/mdia[0]/minf[0]/stbl[0] and why it so big when
sample rate 44100 ?
-
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Get flv source from stream with php for ffmpeg
12 octobre 2012, par StephanI'm trying to automatically create thumbnails from different video sites like vimeo on server side with php and ffmpeg. I got the flv url with video-download-helper and created the thumbnails successfully with ffmpeg.
However, I fail at getting the flv url from my first curl response. VideoDonwloadHelper creates the url only after I clicked on the video from the "Content-Type : video/mp4" response - but how do I fetch it automatically on server-side without the DownloadHelper ?
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