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  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Installation en mode ferme

    4 février 2011, par

    Le mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
    C’est la méthode que nous utilisons sur cette même plateforme.
    L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
    Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...)

  • Installation en mode standalone

    4 février 2011, par

    L’installation de la distribution MediaSPIP se fait en plusieurs étapes : la récupération des fichiers nécessaires. À ce moment là deux méthodes sont possibles : en installant l’archive ZIP contenant l’ensemble de la distribution ; via SVN en récupérant les sources de chaque modules séparément ; la préconfiguration ; l’installation définitive ;
    [mediaspip_zip]Installation de l’archive ZIP de MediaSPIP
    Ce mode d’installation est la méthode la plus simple afin d’installer l’ensemble de la distribution (...)

Sur d’autres sites (7756)

  • ffmpeg, add film grain, resize and create sbs file for stereo 3d

    14 juillet 2018, par Anmol Mishra

    I have 2 files with 1080p Res.

    I wish to resize each to 1920x2160, combine both into sbs 3840x2160, add subtle film grain, add burn in subtitles into each eye and finally create sbs 4k stereo 3d video file with CRF 18.

    I have used ffmpeg previously but this is way beyond my understanding for the filters.

  • FFMPEG frames lost

    4 juin 2018, par ST94

    I use ffmpeg to stream video from the source to destination. The workflow is as follows,
    At the source using ffmpeg, I stream live feed from a webcam using tcp and also save a copy of the live video as mp4 file locally and the command I use is

    $ ffmpeg -hide_banner -f v4l2 -i /dev/video0 -filter:v "fps=30" -c:v libx264 -f mpegts tcp://hostname:port -c:v libx264 /path/to/.mp4file
    

    
`Input #0, video4linux2,v4l2, from '/dev/video0':
    
  Duration: N/A, start: 272402.639303, bitrate: 147456 kb/s
    
    Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, 147456 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
    
  Stream #0:0 -> #1:0 (rawvideo (native) -> h264 (libx264))
    
Press [q] to stop, [?] for help
    
No pixel format specified, yuv422p for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264 @ 0x55e421ec9560] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x55e421ec9560] profile High 4:2:2, level 3.0, 4:2:2 8-bit
    
Output #0, mpegts, to 'tcp://172.16.0.169:50000':
    
  Metadata:
    
    encoder         : Lavf57.71.100
    
    Stream #0:0: Video: h264 (libx264), yuv422p, 640x480, q=-1--1, 30 fps, 90k tbn, 30 tbc
    
    Metadata:
    
      encoder         : Lavc57.89.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
No pixel format specified, yuv422p for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264 @ 0x55e421ed5ea0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x55e421ed5ea0] profile High 4:2:2, level 3.0, 4:2:2 8-bit
    
[libx264 @ 0x55e421ed5ea0] 264 - core 148 r2795 aaa9aa8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=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_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=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 #1, mp4, to '/path/to/tcp.mp4':
    
  Metadata:
    
    encoder         : Lavf57.71.100
    
    Stream #1:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv422p, 640x480, q=-1--1, 30 fps, 15360 tbn, 30 tbc
    
    Metadata:
    
      encoder         : Lavc57.89.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
[sana@localhost ~]$ frame=  978 fps= 30 q=-1.0 Lq=-1.0 size=    5062kB time=00:00:32.53 bitrate=1274.6kbits/s dup=514 drop=0 speed=0.991x    
    
video:9174kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
    
[libx264 @ 0x55e421ec9560] frame I:463   Avg QP:19.03  size:  9994
    
[libx264 @ 0x55e421ec9560] frame P:476   Avg QP:22.85  size:   137
    
[libx264 @ 0x55e421ec9560] frame B:39    Avg QP:23.33  size:    19
    
[libx264 @ 0x55e421ec9560] consecutive B-frames: 94.7%  0.0%  0.0%  5.3%
    
[libx264 @ 0x55e421ec9560] mb I  I16..4: 60.4% 39.0%  0.5%
    
[libx264 @ 0x55e421ec9560] mb P  I16..4:  0.2%  0.0%  0.0%  P16..4:  4.2%  0.3%  0.5%  0.0%  0.0%    skip:94.8%
    
[libx264 @ 0x55e421ec9560] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.0%  0.0%  0.0%  direct: 0.0%  skip:100.0%  L0:15.4% L1:84.6% BI: 0.0%
    
[libx264 @ 0x55e421ec9560] 8x8 transform intra:38.9% inter:100.0%
    
[libx264 @ 0x55e421ec9560] coded y,uvDC,uvAC intra: 34.9% 97.2% 83.8% inter: 0.0% 1.5% 0.0%
    
[libx264 @ 0x55e421ec9560] i16 v,h,dc,p:  0% 31%  0% 69%
    
[libx264 @ 0x55e421ec9560] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  3% 50% 16%  4%  2%  1%  6%  1% 17%
    
[libx264 @ 0x55e421ec9560] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 52% 14%  4%  7%  3%  5%  1%  3%
    
[libx264 @ 0x55e421ec9560] i8c dc,h,v,p: 55% 12% 25%  8%
    
[libx264 @ 0x55e421ec9560] Weighted P-Frames: Y:0.2% UV:0.0%
    
[libx264 @ 0x55e421ec9560] ref P L0: 96.7%  0.5%  2.7%  0.1%
    
[libx264 @ 0x55e421ec9560] kb/s:1151.61
    
[libx264 @ 0x55e421ed5ea0] frame I:463   Avg QP:19.02  size: 10007
    
[libx264 @ 0x55e421ed5ea0] frame P:477   Avg QP:22.84  size:   140
    
[libx264 @ 0x55e421ed5ea0] frame B:39    Avg QP:23.33  size:    19
    
[libx264 @ 0x55e421ed5ea0] consecutive B-frames: 94.7%  0.0%  0.0%  5.3%
    
[libx264 @ 0x55e421ed5ea0] mb I  I16..4: 60.4% 39.0%  0.5%
    
[libx264 @ 0x55e421ed5ea0] mb P  I16..4:  0.3%  0.0%  0.0%  P16..4:  4.2%  0.3%  0.5%  0.0%  0.0%    skip:94.8%
    
[libx264 @ 0x55e421ed5ea0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.0%  0.0%  0.0%  direct: 0.0%  skip:100.0%  L0:15.4% L1:84.6% BI: 0.0%
    
[libx264 @ 0x55e421ed5ea0] 8x8 transform intra:38.9% inter:100.0%
    
[libx264 @ 0x55e421ed5ea0] coded y,uvDC,uvAC intra: 35.0% 97.2% 84.0% inter: 0.0% 1.6% 0.0%
    
[libx264 @ 0x55e421ed5ea0] i16 v,h,dc,p:  0% 31%  0% 69%
    
[libx264 @ 0x55e421ed5ea0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  3% 50% 16%  4%  2%  1%  6%  1% 17%
    
[libx264 @ 0x55e421ed5ea0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 52% 14%  4%  7%  3%  5%  1%  3%
    
[libx264 @ 0x55e421ed5ea0] i8c dc,h,v,p: 55% 12% 25%  8%
    
[libx264 @ 0x55e421ed5ea0] Weighted P-Frames: Y:0.2% UV:0.0%
    
[libx264 @ 0x55e421ed5ea0] ref P L0: 96.8%  0.5%  2.7%  0.1%
    
[libx264 @ 0x55e421ed5ea0] kb/s:1152.39`

    At the receiver, I take the tcp url as the input and output it to an mp4 file.

    $ffmpeg -hide_banner -i tcp://hostname:port?listen out.mp4 /path/to/.mp4

    The output is

    `Input #0, mpegts, from 'tcp://172.16.0.169:50000?listen':
    
  Duration: N/A, start: 1.466667, bitrate: N/A
    
  Program 1 
    
    Metadata:
    
      service_name    : Service01
    
      service_provider: FFmpeg
    
    Stream #0:0[0x100]: Video: h264 (High 4:2:2) ([27][0][0][0] / 0x001B), yuv422p(progressive), 640x480, 30 fps, 30 tbr, 90k tbn, 60 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
Press [q] to stop, [?] for help
    
No pixel format specified, yuv422p for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264 @ 0x55c1d6bff0a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x55c1d6bff0a0] profile High 4:2:2, level 3.0, 4:2:2 8-bit
    
[libx264 @ 0x55c1d6bff0a0] 264 - core 148 r2795 aaa9aa8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=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_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=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 '/home/sana/Desktop/receiver_new_mp4/tcp2.mp4':
    
  Metadata:
    
    encoder         : Lavf57.71.100
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv422p, 640x480, q=-1--1, 30 fps, 15360 tbn, 30 tbc
    
    Metadata:
    
      encoder         : Lavc57.89.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
frame=  160 fps=0.0 q=26.0 size=     158kB time=00:00:03.36 bitrate= 384.5kbits/frame=  175 fps=168 q=26.0 size=     200kB time=00:00:03.86 bitrate= 424.8kbits/frame=  190 fps=119 q=26.0 size=     242kB time=00:00:04.36 bitrate= 453.3kbits/frame=  206 fps= 97 q=29.0 size=     292kB time=00:00:04.90 bitrate= 487.8kbits/frame=  222 fps= 84 q=29.0 size=     336kB time=00:00:05.43 bitrate= 506.5kbits/frame=  238 fps= 75 q=29.0 size=     378kB time=00:00:05.96 bitrate= 519.2kbits/frame=  254 fps= 68 q=29.0 size=     422kB time=00:00:06.50 bitrate= 531.6kbits/frame=  270 fps= 64 q=26.0 size=     457kB time=00:00:07.03 bitrate= 532.0kbits/frame=  286 fps= 60 q=29.0 size=     511kB time=00:00:07.56 bitrate= 552.8kbits/frame=  302 fps= 57 q=26.0 size=     562kB time=00:00:08.10 bitrate= 568.3kbits/frame=  318 fps= 54 q=26.0 size=     609kB time=00:00:08.63 bitrate= 577.9kbits/frame=  334 fps= 52 q=26.0 size=     674kB time=00:00:09.16 bitrate= 602.7kbits/frame=  350 fps= 51 q=29.0 size=     719kB time=00:00:09.70 bitrate= 606.8kbits/frame=  366 fps= 49 q=26.0 size=     770kB time=00:00:10.23 bitrate= 616.1kbits/frame=  382 fps= 48 q=29.0 size=     828kB time=00:00:10.76 bitrate= 630.3kbits/frame=  398 fps= 47 q=26.0 size=     872kB time=00:00:11.30 bitrate= 632.0kbits/frame=  414 fps= 46 q=26.0 size=     933kB time=00:00:11.83 bitrate= 645.9kbits/frame=  430 fps= 45 q=29.0 size=     987kB time=00:00:12.36 bitrate= 653.9kbits/frame=  446 fps= 44 q=26.0 size=    1033kB time=00:00:12.90 bitrate= 656.2kbits/frame=  462 fps= 43 q=29.0 size=    1098kB time=00:00:13.43 bitrate= 669.7kbits/frame=  478 fps= 43 q=29.0 size=    1132kB time=00:00:13.96 bitrate= 664.2kbits/frame=  548 fps= 47 q=-1.0 Lsize=    1536kB time=00:00:18.16 bitrate= 692.8kbits/s speed=1.56x    
    
video:1531kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.377405%
    
[libx264 @ 0x55c1d6bff0a0] frame I:115   Avg QP:18.12  size:  8204
    
[libx264 @ 0x55c1d6bff0a0] frame P:203   Avg QP:21.62  size:  1893
    
[libx264 @ 0x55c1d6bff0a0] frame B:230   Avg QP:21.99  size:  1039
    
[libx264 @ 0x55c1d6bff0a0] consecutive B-frames: 41.1%  6.6%  7.1% 45.3%
    
[libx264 @ 0x55c1d6bff0a0] mb I  I16..4: 67.6% 32.3%  0.1%
    
[libx264 @ 0x55c1d6bff0a0] mb P  I16..4: 15.3%  3.1%  0.0%  P16..4: 28.6%  2.8%  2.0%  0.0%  0.0%    skip:48.3%
    
[libx264 @ 0x55c1d6bff0a0] mb B  I16..4:  0.8%  0.3%  0.0%  B16..8: 26.2%  0.4%  0.0%  direct:13.5%  skip:58.7%  L0:65.0% L1:34.5% BI: 0.5%
    
[libx264 @ 0x55c1d6bff0a0] 8x8 transform intra:28.4% inter:100.0%
    
[libx264 @ 0x55c1d6bff0a0] coded y,uvDC,uvAC intra: 15.0% 89.4% 53.1% inter: 2.6% 28.7% 0.2%
    
[libx264 @ 0x55c1d6bff0a0] i16 v,h,dc,p:  2% 49%  1% 47%
    
[libx264 @ 0x55c1d6bff0a0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  6% 57% 19%  2%  1%  1%  4%  1%  9%
    
[libx264 @ 0x55c1d6bff0a0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 59% 18%  1%  2%  1%  2%  0%  1%
    
[libx264 @ 0x55c1d6bff0a0] i8c dc,h,v,p: 52% 17% 27%  4%
    
[libx264 @ 0x55c1d6bff0a0] Weighted P-Frames: Y:17.7% UV:6.9%
    
[libx264 @ 0x55c1d6bff0a0] ref P L0: 68.7%  0.7% 18.3% 10.6%  1.7%
    
[libx264 @ 0x55c1d6bff0a0] ref B L0: 86.1% 10.6%  3.3%
    
[libx264 @ 0x55c1d6bff0a0] ref B L1: 96.6%  3.4%
    
[libx264 @ 0x55c1d6bff0a0] kb/s:686.10`

    From the ffmpeg processes running on both ends, if you notice the number of B frames at the receiver is more than the B frames at the sender. In other cases that I tried, the number of I as well as P frames are higher at the receiver than that at the sender.
    Can anyone please tell me why is it so ? I am not able to figure out why.

  • Sega FILM : set dts and duration when demuxing

    9 avril 2018, par Misty De Meo
    Sega FILM : set dts and duration when demuxing

    Reviewed-by : Kyle Swanson <k@ylo.ph>
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavformat/segafilm.c

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