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  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

  • 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

  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

Sur d’autres sites (6430)

  • FFMPEG conversion to MXF [closed]

    16 février 2012, par MFB

    I have to wrap an MPEG2 video file in an MXF container and convert the audio in the process. I have the MXF wrapping working but it won't convert the audio stream (which needs to be 16bit, 48kHz Linear PCM).

    Here's what I'm trying :

    ffmpeg -i input.mpg -map 0:0 -map 0:1 -vcodec copy -f mpeg2video -acodec pcm_s16le -ar 48000 -ac 2 output.mxf

    Results :

    ffmpeg version 0.10 Copyright (c) 2000-2012 the FFmpeg developers
    
  built on Jan 30 2012 17:49:23 with gcc 4.2.1 (Apple Inc. build 5666) (dot 3)
    
  configuration: *{snipped}*
    
runtime-cpudetect
    
  libavutil      51. 34.101 / 51. 34.101
    
  libavcodec     53. 60.100 / 53. 60.100
    
  libavformat    53. 31.100 / 53. 31.100
    
  libavdevice    53.  4.100 / 53.  4.100
    
  libavfilter     2. 60.100 /  2. 60.100
    
  libswscale      2.  1.100 /  2.  1.100
    
  libswresample   0.  6.100 /  0.  6.100
    
  libpostproc    52.  0.100 / 52.  0.100
    
[mpeg @ 0x10201ae00] max_analyze_duration 5000000 reached at 5000000
    
Input #0, mpeg, from '/Volumes/Extra/test.mpg':
    
  Duration: 00:00:59.97, start: 0.192911, bitrate: 6513 kb/s
    
    Stream #0:0[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    
    Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 12000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
    
Output #0, mpeg2video, to 'video.mxf':
    
  Metadata:
    
    encoder         : Lavf53.31.100
    
    Stream #0:0: Video: mpeg2video, yuv420p, 720x576 [SAR 16:15 DAR 4:3], q=2-31, 12000 kb/s, 25 fps, 90k tbn, 25 tbc
    
Stream mapping:
    
  Stream #0:1 -> #0:0 (copy)
    
Press [q] to stop, [?] for help
    
frame= 1500 fps=  0 q=-1.0 Lsize=   43949kB time=00:00:59.96 bitrate=6004.6kbits/s    
    
video:43949kB audio:0kB global headers:0kB muxing overhead 0.000000%

    The video plays fine as the MXF, but there is no audio stream at all. Any help would be great.

  • Documentation #2846 : blocage des notification à cause d’une protection .htaccess

    23 février 2013, par b b

    Je change le tracker vers documentation car il serait intéressant de diffuser cette info qui peut être utile aux personnes qui rencontrent ce problème.

  • GStreamer with MPEG-TS Video4Linux ATSC/DVB Recording

    21 juin 2013, par Dustin Oprea

    I'm having an impossible time setting up a filtergraph to read from a recording that I made from my DVB video4linux device. Any help would be vastly appreciated.

    How I made the recording :

    To tune the channel :

    azap -c ~/channels.conf "Florida"

    To record the channel :

    cat /dev/dvb/adapter0/dvr0 > /tmp/test

    This is the way that recordings must be made (I can not use any GST DVB plugins to do this for me).

    I used tstools to identify that the recording is a TS stream :

    tstools/bin$ ./stream_type ~/recordings/20130129-202049
    
Reading from /home/dustin/recordings/20130129-202049
    
It appears to be Transport Stream

    ...but that there are no PAT/PMT frames :

    tstools/bin$ ./tsinfo ~/recordings/20130129-202049
    
Reading from /home/dustin/recordings/20130129-202049
    
Scanning 10000 TS packets
    

    
Found 0 PAT packets and 0 PMT packets in 10000 TS packets

    I was able to produce a single ES (elementary stream) stream, by running ts2es :

    tstools/bin$ ./ts2es -pid 97 ~/recordings/20130129-202049 ~/recordings/20130129-202049.es
    
Reading from /home/dustin/recordings/20130129-202049
    
Writing to   /home/dustin/recordings/20130129-202049.es
    
Extracting packets for PID 0061 (97)
    
!!! 4 bytes ignored at end of file - not enough to make a TS packet
    
Extracted 219258 of 248113 TS packets

    I am able to play the ES stream (even though the video is frozen on the first frame) :

    gst-launch-0.10 filesrc location=~/recordings/20130129-202049.es ! decodebin2 ! autovideosink
    
gst-launch-0.10 filesrc location=~/recordings/20130129-202049.es ! decodebin2 ! xvimagesink
    
gst-launch-0.10 playbin2 uri=file:///home/dustin/recordings/20130129-202049.es

    No matter what I do, though, I can't get the original TS file to open. However, it opens in Mplayer/FFMPEG, perfectly (but not VLC). This is the output of FFMPEG :

    ffmpeg -i 20130129-202049
    

    
ffmpeg version 0.8.5-4:0.8.5-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
    
  built on Jan 24 2013 18:03:14 with gcc 4.6.3
    
*** THIS PROGRAM IS DEPRECATED ***
    
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
    
[mpeg2video @ 0x9be7be0] mpeg_decode_postinit() failure
    
    Last message repeated 4 times
    
[mpegts @ 0x9be3aa0] max_analyze_duration reached
    
[mpegts @ 0x9be3aa0] PES packet size mismatch
    
Input #0, mpegts, from '20130129-202049':
    
  Duration: 00:03:39.99, start: 9204.168844, bitrate: 1696 kb/s
    
    Stream #0.0[0x61]: Video: mpeg2video (Main), yuv420p, 528x480 [PAR 40:33 DAR 4:3], 15000 kb/s, 30.57 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0.1[0x64]: Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
    
At least one output file must be specified

    This tells us that the video stream has PID 0x61 (97).

    I have been trying for a few days, so the following are only examples of a couple of attempts. I'll provide the playbin2 example first, since I know that thousands of people will respond, insisting that I just use that. It doesn't work.

    gst-launch-0.10 playbin2 uri=file:///home/dustin/recordings/20130129-202049
    

    
Setting pipeline to PAUSED ...
    
Pipeline is PREROLLING ...
    
ERROR: from element /GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0/GstDecodeBin2:decodebin20/GstMpegTSDemux:mpegtsdemux0: Could not determine type of stream.
    
Additional debug info:
    
gstmpegtsdemux.c(2931): gst_mpegts_demux_sink_event (): /GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0/GstDecodeBin2:decodebin20/GstMpegTSDemux:mpegtsdemux0:
    
No valid streams found at EOS
    
ERROR: pipeline doesn't want to preroll.
    
Setting pipeline to NULL ...
    
Freeing pipeline ...

    It fails [probably] because no PID has been specified with which to find the video (the "EOS" error, I think).

    Naturally, I tried the following to start by demuxing the TS format. I believe it's the "es-pids" property that receives the PID in the absence of PMT information (which tstools said there weren't any, above), but I tried "program-number", too, just in case. gst-inspect indicates that one is hex and the other is decimal :

    gst-launch-0.10 -v filesrc location=20130129-202049 ! mpegtsdemux es-pids=0x61 ! fakesink
    
gst-launch-0.10 -v filesrc location=20130129-202049 ! mpegtsdemux program-number=97 ! fakesink

    Output :

    gst-launch-0.10 filesrc location=20130129-202049 ! mpegtsdemux es-pids=0x61 ! fakesink
    
Setting pipeline to PAUSED ...
    
Pipeline is PREROLLING ...
    
ERROR: from element /GstPipeline:pipeline0/GstMpegTSDemux:mpegtsdemux0: Could not determine type of stream.
    
Additional debug info:
    
gstmpegtsdemux.c(2931): gst_mpegts_demux_sink_event (): /GstPipeline:pipeline0/GstMpegTSDemux:mpegtsdemux0:
    
No valid streams found at EOS
    
ERROR: pipeline doesn't want to preroll.
    
Setting pipeline to NULL ...
    
Freeing pipeline ...
    
dustin@dustinmicro:~/recordings$ gst-launch-0.10 -v filesrc location=20130129-202049 ! mpegtsdemux es-pids=0x61 ! fakesink
    
Setting pipeline to PAUSED ...
    
Pipeline is PREROLLING ...
    
ERROR: from element /GstPipeline:pipeline0/GstMpegTSDemux:mpegtsdemux0: Could not determine type of stream.
    
Additional debug info:
    
gstmpegtsdemux.c(2931): gst_mpegts_demux_sink_event (): /GstPipeline:pipeline0/GstMpegTSDemux:mpegtsdemux0:
    
No valid streams found at EOS
    
ERROR: pipeline doesn't want to preroll.
    
Setting pipeline to NULL ...
    
Freeing pipeline ...
    
dustin@dustinmicro:~/recordings$ gst-launch-0.10 -v filesrc location=20130129-202049 ! mpegtsdemux es-pids=0x61 ! fakesink
    
Setting pipeline to PAUSED ...
    
Pipeline is PREROLLING ...
    
ERROR: from element /GstPipeline:pipeline0/GstMpegTSDemux:mpegtsdemux0: Could not determine type of stream.
    
Additional debug info:
    
gstmpegtsdemux.c(2931): gst_mpegts_demux_sink_event (): /GstPipeline:pipeline0/GstMpegTSDemux:mpegtsdemux0:
    
No valid streams found at EOS
    
ERROR: pipeline doesn't want to preroll.
    
Setting pipeline to NULL ...
    
Freeing pipeline ...

    However, when I try mpegpsdemux (for program streams (PS), as opposed to transport streams (TS)), I get further :

    gst-launch-0.10 filesrc location=20130129-202049 ! mpegpsdemux ! fakesink
    

    
Setting pipeline to PAUSED ...
    
Pipeline is PREROLLING ...
    

    
(gst-launch-0.10:14805): GStreamer-CRITICAL **: gst_event_new_new_segment_full: assertion `position != -1' failed
    

    
(gst-launch-0.10:14805): GStreamer-CRITICAL **: gst_mini_object_ref: assertion `mini_object != NULL' failed
    

    
(gst-launch-0.10:14805): GStreamer-CRITICAL **: gst_pad_push_event: assertion `event != NULL' failed
    
Pipeline is PREROLLED ...
    
Setting pipeline to PLAYING ...
    
New clock: GstSystemClock
    

    
(gst-launch-0.10:14805): GStreamer-CRITICAL **: gst_event_new_new_segment_full: assertion `position != -1' failed
    

    
(gst-launch-0.10:14805): GStreamer-CRITICAL **: gst_mini_object_ref: assertion `mini_object != NULL' failed
    

    
(gst-launch-0.10:14805): GStreamer-CRITICAL **: gst_pad_push_event: assertion `event != NULL' failed
    

    
(gst-launch-0.10:14805): GStreamer-CRITICAL **: gst_event_new_new_segment_full: assertion `position != -1' failed
    

    
(gst-launch-0.10:14805): GStreamer-CRITICAL **: gst_mini_object_ref: assertion `mini_object != NULL' failed
    

    
(gst-launch-0.10:14805): GStreamer-CRITICAL **: gst_pad_push_event: assertion `event != NULL' failed
    

    
(gst-launch-0.10:14805): GStreamer-CRITICAL **: gst_event_new_new_segment_full: assertion `position != -1' failed
    

    
(gst-launch-0.10:14805): GStreamer-CRITICAL **: gst_mini_object_ref: assertion `mini_object != NULL' failed
    

    
(gst-launch-0.10:14805): GStreamer-CRITICAL **: gst_pad_push_event: assertion `event != NULL' failed
    

    

    
...
    

    

    
Got EOS from element "pipeline0".
    
Execution ended after 1654760008 ns.
    
Setting pipeline to PAUSED ...
    
Setting pipeline to READY ...
    
Setting pipeline to NULL ...
    
Freeing pipeline ...

    I'll still get the same problem whenever I use the mpegtsdemux, even if it follows mpegpsdemux, above.

    I don't understand this, since I haven't even picked a PID yet.

    What am I doing wrong ?

    Dustin

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