Recherche avancée

Médias (91)

Autres articles (11)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • Participer à sa documentation

    10 avril 2011

    La documentation est un des travaux les plus importants et les plus contraignants lors de la réalisation d’un outil technique.
    Tout apport extérieur à ce sujet est primordial : la critique de l’existant ; la participation à la rédaction d’articles orientés : utilisateur (administrateur de MediaSPIP ou simplement producteur de contenu) ; développeur ; la création de screencasts d’explication ; la traduction de la documentation dans une nouvelle langue ;
    Pour ce faire, vous pouvez vous inscrire sur (...)

  • Le plugin : Podcasts.

    14 juillet 2010, par

    Le 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
    Le format d’Apple n’autorise que les formats suivants dans ses flux : .mp3 audio/mpeg .m4a audio/x-m4a .mp4 (...)

Sur d’autres sites (2501)

  • Getting incorrect output resolution ffmpeg

    29 octobre 2011, par Adam

    I am capturing an RTSP stream from a security camera, and transcoding it for (live streaming) to iphone, using OSX as the encoding platform.
    I have it working correctly, and Im tuning it.
    However, it seems that it is not outputting the requested resolution. This is my script

    /Applications/SecurityCamera/openRTSP -v -c -t rtsp://10.0.1.118/ch1-s1 | \
    
    /Applications/SecurityCamera/ffmpeg \
    
    -r 10 -i - \
    
    -y -an -ab 64000 -f mpegts -vcodec copy -s 960x640 \
    
    -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 \
    
    -subq 5 -trellis 1 -refs 1 -coder 0 -me_range 16  -keyint_min 25 -sc_threshold 40 \
    
    -i_qfactor 0.71 -bt 400k -maxrate 524288 -bufsize 524288 \
    
    -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 \
    
    -aspect 960:640 -r 10 -g 10 -async 2 -\
    
    | /Applications/SecurityCamera/mediastreamsegmenter -b http://hydracam.dyndns.org:8080/ -f /Library/WebServer/Documents/ -i stream.m3u8 -t 10 -s 4 -D

    This is the status report :

    Input #0, h264, from 'pipe:':
    

    
  Duration: N/A, bitrate: N/A
    
  Stream #0.0: Video: h264, yuv420p, 1600x1200, 10 fps, 10 tbr, 1200k tbn, 20 tbc
    
  [mpegts @ 0x10100c200] muxrate VBR, pcr every 1 pkts, sdt every 200, pat/pmt every 40 pkts
    
  Output #0, mpegts, to 'pipe:':
    
  Metadata:
    
    encoder         : Lavf52.93.0
    
    Stream #0.0: Video: libx264, yuv420p, 1600x1200 [PAR 1:1 DAR 4:3], q=2-31, 90k tbn, 10 tbc
    
Stream mapping:
    
  Stream #0.0 -> #0.0

    You can see that its working, but it is outputting 1600x1200 for some reason.

    If I change the -vcodec copy to -vcodec libx264 then I get the correct status report (stating 960x640, correct), but the streaming halts after 54 frames (see output below)

    Seems stream 0 codec frame rate differs from container frame rate: 20.00 (20/1) -> 10.00 (20/2)
    
Input #0, h264, from 'pipe:':
    
  Duration: N/A, bitrate: N/A
    
    Stream #0.0: Video: h264, yuv420p, 1600x1200, 10 fps, 10 tbr, 1200k tbn, 20 tbc
    
[buffer @ 0x100d02420] w:1600 h:1200 pixfmt:yuv420p
    
[scale @ 0x100d026f0] w:1600 h:1200 fmt:yuv420p -> w:960 h:640 fmt:yuv420p flags:0x4
    
[libx264 @ 0x10100d400] using SAR=1/1
    
[libx264 @ 0x10100d400] frame MB size (60x40) > level limit (1620)
    
[libx264 @ 0x10100d400] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowCTZ SlowAtom
    
[libx264 @ 0x10100d400] profile Constrained Baseline, level 3.0
    
[mpegts @ 0x10100c200] muxrate VBR, pcr every 1 pkts, sdt every 200, pat/pmt every 40 pkts
    
Output #0, mpegts, to 'pipe:':
    
  Metadata:
    
    encoder         : Lavf52.93.0
    
    Stream #0.0: Video: libx264, yuv420p, 960x640 [PAR 1:1 DAR 3:2], q=10-51, 200 kb/s, 90k tbn, 10 tbc
    
Stream mapping:
    
  Stream #0.0 -> #0.0
    
read pmap fffps=  3 q=37.0 size=      37kB time=0.10 bitrate=3008.0kbits/s    bits/s    
    
video pid set at 100
    
found sequence start
    
  next segment value 1026000
    
written bytes 376 skipped 0
    
frame=   54 fps=  2 q=-1.0 Lsize=     160kB time=5.40 bitrate= 242.0kbits/s    
    
video:141kB audio:0kB global headers:0kB muxing overhead 12.872737%
    
frame I:6     Avg QP:34.68  size: 23524
    
[libx264 @ 0x10100d400] frame P:48    Avg QP:41.53  size:    75
    
[libx264 @ 0x10100d400] mb I  I16..4: 63.9%  0.0% 36.1%
    
[libx264 @ 0x10100d400] mb P  I16..4:  0.1%  0.0%  0.0%  P16..4:  0.8%  0.1%  0.0%  0.0%  0.0%    skip:99.0%
    
[libx264 @ 0x10100d400] final ratefactor: 38.54
    
[libx264 @ 0x10100d400] coded y,uvDC,uvAC intra: 57.7% 22.3% 2.0% inter: 0.0% 0.1% 0.0%
    
[libx264 @ 0x10100d400] i16 v,h,dc,p: 23% 35% 27% 15%
    
[libx264 @ 0x10100d400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 32% 16%  4%  3%  3%  7%  4%  8%
    
[libx264 @ 0x10100d400] i8c dc,h,v,p: 83% 11%  5%  0%
    
[libx264 @ 0x10100d400] kb/s:214.43

  • Anomalie #2417 : Icone edit-24.png

    15 novembre 2011, par Joseph Larmarange

    oki doki. Ceci dit, quand les nouvelles icônes de SPIP ont été réalisées, quelqu’un a-t-il garder un historique du ’edit-24.png’ utilisé pour générer les icônes ’article-edit-24.png’, ’rubrique-edit-24.png’ etc. ? De même, pour une mini icône ’err’ utilisée notamment par ’plugin-err-32.png’ ? Car si j’ai (...)

  • Getting either incorrect output resolution or FPS from ffmpeg

    5 novembre 2011, par Adam

    I am capturing an RTSP stream from a security camera, and transcoding it for (live streaming) to iphone, using OSX as the encoding platform.
    I have it working correctly, and Im tuning it.
    However, it seems that it is not outputting the requested resolution. This is my script

    /Applications/SecurityCamera/openRTSP -v -c -t rtsp://10.0.1.118/ch1-s1 | \
    
    /Applications/SecurityCamera/ffmpeg \
    
    -r 10 -i - \
    
    -y -an -ab 64000 -f mpegts -vcodec copy -s 960x640 \
    
    -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 \
    
    -subq 5 -trellis 1 -refs 1 -coder 0 -me_range 16  -keyint_min 25 \
    
    -sc_threshold 40 -i_qfactor 0.71 -bt 400k -maxrate 524288 -bufsize 524288 \
    
    -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 \
    
    -aspect 960:640 -r 10 -g 10 -async 2 -\
    
    |/Applications/SecurityCamera/mediastreamsegmenter -b http://localhost:8080/\
    
      -f /Library/WebServer/Documents/ -i stream.m3u8 -t 10 -s 4 -D

    This is the status report :

    Input #0, h264, from 'pipe:':
    

    
  Duration: N/A, bitrate: N/A
    
  Stream #0.0: Video: h264, yuv420p, 1600x1200, 10 fps, 10 tbr, 1200k tbn, 20 tbc
    
  [mpegts @ 0x10100c200] muxrate VBR, pcr every 1 pkts, sdt every 200, pat/pmt every 40 pkts
    
  Output #0, mpegts, to 'pipe:':
    
  Metadata:
    
    encoder         : Lavf52.93.0
    
    Stream #0.0: Video: libx264, yuv420p, 1600x1200 [PAR 1:1 DAR 4:3], q=2-31, 90k tbn, 10 tbc
    
Stream mapping:
    
  Stream #0.0 -> #0.0

    You can see that its working, but it is outputting 1600x1200 for some reason. (possibly -vcodec copy copies all codec parameters, not just the codec type ?)

    If I change the -vcodec copy to -vcodec libx264 then I get the correct status report (stating 960x640, correct), but the streaming switches to 2 FPS (why ? Im forcing both input and output !) and it halts after 54 frames (see output below)

    Seems stream 0 codec frame rate differs from container frame rate: 20.00 (20/1) -> 10.00 (20/2)
    
Input #0, h264, from 'pipe:':
    
  Duration: N/A, bitrate: N/A
    
    Stream #0.0: Video: h264, yuv420p, 1600x1200, 10 fps, 10 tbr, 1200k tbn, 20 tbc
    
[buffer @ 0x100d02420] w:1600 h:1200 pixfmt:yuv420p
    
[scale @ 0x100d026f0] w:1600 h:1200 fmt:yuv420p -> w:960 h:640 fmt:yuv420p flags:0x4
    
[libx264 @ 0x10100d400] using SAR=1/1
    
[libx264 @ 0x10100d400] frame MB size (60x40) > level limit (1620)
    
[libx264 @ 0x10100d400] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowCTZ SlowAtom
    
[libx264 @ 0x10100d400] profile Constrained Baseline, level 3.0
    
[mpegts @ 0x10100c200] muxrate VBR, pcr every 1 pkts, sdt every 200, pat/pmt every 40 pkts
    
Output #0, mpegts, to 'pipe:':
    
  Metadata:
    
    encoder         : Lavf52.93.0
    
    Stream #0.0: Video: libx264, yuv420p, 960x640 [PAR 1:1 DAR 3:2], q=10-51, 200 kb/s, 90k tbn, 10 tbc
    
Stream mapping:
    
  Stream #0.0 -> #0.0
    
read pmap fffps=  3 q=37.0 size=      37kB time=0.10 bitrate=3008.0kbits/s    bits/s    
    
video pid set at 100
    
found sequence start
    
  next segment value 1026000
    
written bytes 376 skipped 0
    
frame=   54 fps=  2 q=-1.0 Lsize=     160kB time=5.40 bitrate= 242.0kbits/s    
    
video:141kB audio:0kB global headers:0kB muxing overhead 12.872737%
    
frame I:6     Avg QP:34.68  size: 23524
    
[libx264 @ 0x10100d400] frame P:48    Avg QP:41.53  size:    75
    
[libx264 @ 0x10100d400] mb I  I16..4: 63.9%  0.0% 36.1%
    
[libx264 @ 0x10100d400] mb P  I16..4:  0.1%  0.0%  0.0%  P16..4:  0.8%  0.1%  0.0%  0.0%  0.0%    skip:99.0%
    
[libx264 @ 0x10100d400] final ratefactor: 38.54
    
[libx264 @ 0x10100d400] coded y,uvDC,uvAC intra: 57.7% 22.3% 2.0% inter: 0.0% 0.1% 0.0%
    
[libx264 @ 0x10100d400] i16 v,h,dc,p: 23% 35% 27% 15%
    
[libx264 @ 0x10100d400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 32% 16%  4%  3%  3%  7%  4%  8%
    
[libx264 @ 0x10100d400] i8c dc,h,v,p: 83% 11%  5%  0%
    
[libx264 @ 0x10100d400] kb/s:214.43

Navigation