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  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • 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 (...)

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

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  • ffmpeg stops randomly with "No more output streams to write to, finishing" when reading rtsp stream [on hold]

    7 juin 2016, par ImagineDragon

    Basically I am running the following ffmpeg command to read an h264 rtsp stream using hls muxer, under Ubuntu 14.04 64bit with i7 CPU and 8GB memory :

    ffmpeg -v debug -i rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB -codec copy -flags -global_header -f hls -hls_time 5 -use_localtime 1 -hls_segment_filename '/home/eason/ffmpeg-test/%s.ts' '/home/eason/ffmpeg-test/live.m3u8'
    
ffmpeg version N-79139-gde1a0d4 Copyright (c) 2000-2016 the FFmpeg developers
    
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
    
  configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab
    
  libavutil      55. 19.100 / 55. 19.100
    
  libavcodec     57. 30.100 / 57. 30.100
    
  libavformat    57. 29.101 / 57. 29.101
    
  libavdevice    57.  0.101 / 57.  0.101
    
  libavfilter     6. 40.102 /  6. 40.102
    
  libavresample   3.  0.  0 /  3.  0.  0
    
  libswscale      4.  0.100 /  4.  0.100
    
  libswresample   2.  0.101 /  2.  0.101
    
  libpostproc    54.  0.100 / 54.  0.100
    
Splitting the commandline.
    
Reading option '-v' ... matched as option 'v' (set logging level) with argument 'debug'.
    
Reading option '-re' ... matched as option 're' (read input at native frame rate) with argument '1'.
    
Reading option '-i' ... matched as input file with argument 'rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB'.
    
Reading option '-codec' ... matched as option 'codec' (codec name) with argument 'copy'.
    
Reading option '-flags' ... matched as AVOption 'flags' with argument '-global_header'.
    
Reading option '-f' ... matched as option 'f' (force format) with argument 'hls'.
    
Reading option '-hls_time' ... matched as AVOption 'hls_time' with argument '5'.
    
Reading option '-use_localtime' ... matched as AVOption 'use_localtime' with argument '1'.
    
Reading option '-hls_segment_filename' ... matched as AVOption 'hls_segment_filename' with argument '/home/eason/ffmpeg-test/%s.ts'.
    
Reading option '/home/eason/ffmpeg-test/live.m3u8' ... matched as output file.
    
Finished splitting the commandline.
    
Parsing a group of options: global .
    
Applying option v (set logging level) with argument debug.
    
Successfully parsed a group of options.
    
Parsing a group of options: input file rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB.
    
Applying option re (read input at native frame rate) with argument 1.
    
Successfully parsed a group of options.
    
Opening an input file: rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB.
    
[tcp @ 0x29c4d60] No default whitelist set
    
[rtsp @ 0x29c2e20] SDP:
    
m=video 0 RTP/AVP 96
    
a=rtpmap:96 H264/90000
    
a=fmtp:96 packetization-mode=1;profile-level-id=640028;sprop-parameter-sets=Z2QAKKzoBQBbkA==,aO48sA==
    
a=control:trackID=0
    
m=audio 0 RTP/AVP 98
    
a=rtpmap:98 MPEG4-GENERIC/16000/1
    
a=fmtp:98 profile-level-id=1;mode=AAC-lbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1408;cpresent=0;
    
a=control:trackID=1
    

    

    
[rtsp @ 0x29c2e20] video codec set to: h264
    
[rtsp @ 0x29c2e20] RTP Packetization Mode: 1
    
[rtsp @ 0x29c2e20] RTP Profile IDC: 64 Profile IOP: 0 Level: 28
    
[rtsp @ 0x29c2e20] Extradata set to 0x29c4ff0 (size: 22)
    
[rtsp @ 0x29c2e20] audio codec set to: aac
    
[rtsp @ 0x29c2e20] audio samplerate set to: 16000
    
[rtsp @ 0x29c2e20] audio channels set to: 1
    
[rtp @ 0x29c50a0] No default whitelist set
    
[udp @ 0x29c5200] No default whitelist set
    
[udp @ 0x29c5200] end receive buffer size reported is 131072
    
[udp @ 0x29d9480] No default whitelist set
    
[udp @ 0x29d9480] end receive buffer size reported is 131072
    
[rtsp @ 0x29c2e20] method SETUP failed: 461 Unsupported transport
    
[rtsp @ 0x29c2e20] CSeq: 3
    

    
[rtsp @ 0x29c2e20] setting jitter buffer size to 0
    
    Last message repeated 1 times
    
[rtsp @ 0x29c2e20] hello state=0
    
[rtsp @ 0x29c2e20] All info found
    
[rtsp @ 0x29c2e20] rfps: 24.250000 0.018062
    
[rtsp @ 0x29c2e20] rfps: 24.333333 0.012911
    
[rtsp @ 0x29c2e20] rfps: 24.416667 0.008627
    
[rtsp @ 0x29c2e20] rfps: 24.500000 0.005207
    
    Last message repeated 1 times
    
[rtsp @ 0x29c2e20] rfps: 24.583333 0.002653
    
    Last message repeated 1 times
    
[rtsp @ 0x29c2e20] rfps: 24.666667 0.000965
    
    Last message repeated 1 times
    
[rtsp @ 0x29c2e20] rfps: 24.750000 0.000142
    
    Last message repeated 1 times
    
[rtsp @ 0x29c2e20] rfps: 24.833333 0.000185
    
    Last message repeated 1 times
    
[rtsp @ 0x29c2e20] rfps: 24.916667 0.001093
    
    Last message repeated 1 times
    
[rtsp @ 0x29c2e20] rfps: 25.000000 0.002867
    
    Last message repeated 1 times
    
[rtsp @ 0x29c2e20] rfps: 25.083333 0.005507
    
    Last message repeated 1 times
    
[rtsp @ 0x29c2e20] rfps: 25.166667 0.009011
    
[rtsp @ 0x29c2e20] rfps: 25.250000 0.013382
    
[rtsp @ 0x29c2e20] rfps: 25.333333 0.018618
    
[rtsp @ 0x29c2e20] rfps: 50.000000 0.011469
    
Input #0, rtsp, from 'rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB':
    
  Duration: N/A, start: 0.000000, bitrate: N/A
    
    Stream #0:0, 28, 1/90000: Video: h264 (High), 1 reference frame, yuv420p(left), 1280x720, 1/180000, 24.75 tbr, 90k tbn, 180k tbc
    
    Stream #0:1, 23, 1/16000: Audio: aac (LC), 16000 Hz, mono, fltp
    
Successfully opened the file.
    
Parsing a group of options: output file /home/eason/ffmpeg-test/live.m3u8.
    
Applying option codec (codec name) with argument copy.
    
Applying option f (force format) with argument hls.
    
Successfully parsed a group of options.
    
Opening an output file: /home/eason/ffmpeg-test/live.m3u8.
    
Successfully opened the file.
    
[file @ 0x2cae180] Setting default whitelist 'file,crypto'
    
[mpegts @ 0x29f7ce0] muxrate VBR, pcr every 9000 pkts, sdt every 2147483647, pat/pmt every 2147483647 pkts
    
Output #0, hls, to '/home/eason/ffmpeg-test/live.m3u8':
    
  Metadata:
    
    encoder         : Lavf57.29.101
    
    Stream #0:0, 0, 1/90000: Video: h264, 1 reference frame, yuv420p(left), 1280x720 (0x0), 1/90000, q=2-31, 24.75 tbr, 90k tbn, 90k tbc
    
    Stream #0:1, 0, 1/90000: Audio: aac (LC), 16000 Hz, mono
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
    
    Last message repeated 103 times
    
[hls @ 0x2a0fc00] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
    
[AVIOContext @ 0x2c998c0] Statistics: 0 seeks, 155 writeouts=N/A speed=1.01x    
    
[file @ 0x2ba60e0] Setting default whitelist 'file,crypto'
    
[file @ 0x2ca9fc0] Setting default whitelist 'file,crypto'
    
[hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
    
[AVIOContext @ 0x2caa080] Statistics: 0 seeks, 1 writeouts
    
[AVIOContext @ 0x2c99480] Statistics: 0 seeks, 103 writeouts=N/A speed=   1x    
    
[file @ 0x2ba60e0] Setting default whitelist 'file,crypto'
    
[file @ 0x2c97c60] Setting default whitelist 'file,crypto'
    
[hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
    
[AVIOContext @ 0x2c97d20] Statistics: 0 seeks, 1 writeouts
    
[AVIOContext @ 0x2c99480] Statistics: 0 seeks, 104 writeouts=N/A speed=   1x    
    
[file @ 0x2ba60e0] Setting default whitelist 'file,crypto'
    
[file @ 0x2c99680] Setting default whitelist 'file,crypto'
    
[hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
    
[AVIOContext @ 0x2c99820] Statistics: 0 seeks, 1 writeouts
    
[AVIOContext @ 0x2c99480] Statistics: 0 seeks, 28 writeoutse=N/A speed=   1x    
    
[file @ 0x29c50c0] Setting default whitelist 'file,crypto'
    
[file @ 0x2ba60e0] Setting default whitelist 'file,crypto'
    
[hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
    
[AVIOContext @ 0x29c2ce0] Statistics: 0 seeks, 1 writeouts
    
[AVIOContext @ 0x2c99480] Statistics: 0 seeks, 111 writeouts=N/A speed=   1x    
    
[file @ 0x2c97d40] Setting default whitelist 'file,crypto'
    
[file @ 0x2a134e0] Setting default whitelist 'file,crypto'
    
[hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:0
    
[AVIOContext @ 0x2a11000] Statistics: 0 seeks, 1 writeouts
    
[AVIOContext @ 0x2c99480] Statistics: 0 seeks, 105 writeouts=N/A speed=   1x    
    
[file @ 0x29c50c0] Setting default whitelist 'file,crypto'
    
[file @ 0x2a10c00] Setting default whitelist 'file,crypto'
    
[hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:1
    
[AVIOContext @ 0x2a10cc0] Statistics: 0 seeks, 1 writeouts
    
[AVIOContext @ 0x2c99480] Statistics: 0 seeks, 103 writeouts=N/A speed=   1x    
    
[file @ 0x29c50c0] Setting default whitelist 'file,crypto'
    
[file @ 0x2c99480] Setting default whitelist 'file,crypto'
    

    
.......repeat........
    

    
[hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:71
    
[AVIOContext @ 0x2c97fa0] Statistics: 0 seeks, 1 writeouts
    
[rtsp @ 0x29c2e20] Too short data for FU-A H264 RTP packette=N/A speed=   1x    
    
[AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 103 writeouts=N/A speed=   1x    
    
[file @ 0x2c97b20] Setting default whitelist 'file,crypto'
    
[file @ 0x2c97c60] Setting default whitelist 'file,crypto'
    
[hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:72
    
[AVIOContext @ 0x2c99480] Statistics: 0 seeks, 1 writeouts
    
[AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 156 writeouts=N/A speed=   1x    
    
[file @ 0x2c99480] Setting default whitelist 'file,crypto'
    
[file @ 0x2cab600] Setting default whitelist 'file,crypto'
    
[hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:73
    
[AVIOContext @ 0x2cab6c0] Statistics: 0 seeks, 1 writeouts
    
[AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 104 writeouts=N/A speed=   1x    
    
[file @ 0x2cadc00] Setting default whitelist 'file,crypto'
    
[file @ 0x2c99480] Setting default whitelist 'file,crypto'
    
[hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:74
    
[AVIOContext @ 0x29c2ce0] Statistics: 0 seeks, 1 writeouts
    
[AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 103 writeouts=N/A speed=   1x    
    
[file @ 0x2a13540] Setting default whitelist 'file,crypto'
    
[file @ 0x2cab680] Setting default whitelist 'file,crypto'
    
[hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:75
    
[AVIOContext @ 0x2c99480] Statistics: 0 seeks, 1 writeouts
    
No more output streams to write to, finishing.:46.09 bitrate=N/A speed=0.993x    
    
[AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 138 writeouts
    
[file @ 0x29c50c0] Setting default whitelist 'file,crypto'
    
[hls @ 0x2a0fc00] EXT-X-MEDIA-SEQUENCE:76
    
[AVIOContext @ 0x2ba60e0] Statistics: 0 seeks, 1 writeouts
    
frame= 8423 fps= 21 q=-1.0 Lsize=N/A time=00:06:46.09 bitrate=N/A speed=0.993x    
    
video:37031kB audio:1586kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
    
Input file #0 (rtsp://172.16.11.247:554/live/ch00_0?token=hQttXvrjSPOcClQB):
    
  Input stream #0:0 (video): 8423 packets read (37919815 bytes); 
    
  Input stream #0:1 (audio): 6345 packets read (1624337 bytes); 
    
  Total: 14768 packets (39544152 bytes) demuxed
    
Output file #0 (/home/eason/ffmpeg-test/live.m3u8):
    
  Output stream #0:0 (video): 8423 packets muxed (37919815 bytes); 
    
  Output stream #0:1 (audio): 6345 packets muxed (1624337 bytes); 
    
  Total: 14768 packets (39544152 bytes) muxed
    
0 frames successfully decoded, 0 decoding errors

    The problem is that ffmpeg exits randomly after 5 to 20 minutes. The RTSP is a live stream so stopping every 5 minute is really not acceptable. In the ffmpeg log I can’t see any noticeable error except "No more output streams to write to, finishing." near the end. Can someone shed some light upon this ? How can I make ffmpeg run without stopping ? Thanks

  • avfilter/vf_libplacebo : add flexible crop exprs

    1er mai 2023, par Niklas Haas
    avfilter/vf_libplacebo : add flexible crop exprs

    Motivated by a desire to use vf_libplacebo as a GPU-accelerated
    
cropping/padding/zooming filter. This commit adds support for setting
    
the `input/target.crop` fields as dynamic expressions.
    

    Re-use the same generic variables available to other scale and crop type
    
filters, and also add some more that we can afford as a result of being
    
able to set these properties dynamically.
    

    It's worth pointing out that `out_t/ot` is currently redundant with
    
`in_t/t` since it will always contain the same PTS values, but I plan on
    
changing this in the near future.
    

    I decided to also expose `crop_w/crop_h` and `pos_w/pos_h` as variables
    
in the expression parser itself, since this enables the fairly common
    
use case of determining dimensions first and then placing the image
    
appropriately, such as is done in the default behavior (which centers
    
the cropped/placed region by default).
    • [DH] doc/filters.texi
    • [DH] libavfilter/vf_libplacebo.c

  • VP9 tiled encoding for view-port dependent 360-degree VR streaming

    28 janvier 2021, par Victor Coyter

    I am trying to use libvpx-vp9 to encode a 360-degree VR video and generate multi-bitrate viewport-dependent playlist, that is :

    


      

    • A video stream could be splitted in to n*m tiles (e.g., 8x8)

      • 


    • Users may fetch those high-resolution tiles which insides their view-port via HTTP webm

      • 


    • and fetch low-resolution tiles which outsides their view-port

      • 


    • Finally, combine the video (without decoding) and render with OpenGL shaders

      • 


    


    Similar ideas like OMAF has been implemented by Intel / fraunhofer hhi, but they were using H.265.

    


    Is that possible to implement in VP9 ?

    


    The tiles in VP9 is designed to accelerate the encoding process by multi-threading, but as per defined in VP9 bitstream specifications, a tile is a "rectangular region of the frame that could be able to be decoded and encoded independently"

    


    I can find that libvpx provide options : --tile-rows and --tile-column and can successfully run them, while they indeed use multi-thread to encode.

    


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