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Sur d’autres sites (7658)

  • FFmpeg Live streaming, capture card avisynth/graphedit

    19 décembre 2013, par diegonaranjo

    I´m stuck in a problem with a test doing multicast streaming from a Viewcast Osprey 700e HD using ffmpeg.
    The thing is that I´ve to use avisynth(with graphedit) for ffmpeg recognize the card. The streaming has no ending time,
    is a live channel for IPTV.
    The script is working well, but the problem is the avisynth config, because I have to specify the countframe option,
    i think this is for the duration of the clip, but I need an infinity streaming.

    The is script is :

    ffmpeg -i espnhd.avs -rtbufsize 100000k -r 30 -c:v mpeg2video -b:v 5120k -s 1280x720 -g 100 -q:v 2 -c:a ac3 -b:a 256k -f mpegts udp ://239.192.42.61:1234

    The espnhd.avs file is :

    v=directshowsource("espnhdv.GRF", pixel_type="YUV", framecount=1000000, fps=30, audio=False, convertfps=false)
    A=directshowsource("espnhda.GRF", fps=30, framecount=1000000, video=False, convertfps=false)
    AudioDub(V, A)
    loop()

    When i run the application, work fine but the streaming ends when 1000000 frames it´s encoded...
    If i dont specify framecount, ffmpeg doesn´t start with the following error, can´t determine the duration of the clip.

    Is there any way to specify an inifinity duration on avisynth ?

    The streaming stops at 1:57hs. I took the end fo the logs :

    frame=212014 fps= 30 q=4.0 size= 6957018kB time=01:57:54.13 bitrate=8056.4kbits/s dup=0 drop=211 
    
frame=212029 fps= 30 q=4.0 size= 6958383kB time=01:57:54.64 bitrate=8057.4kbits/s dup=0 drop=211 
    
frame=212044 fps= 30 q=4.0 size= 6959504kB time=01:57:55.13 bitrate=8058.1kbits/s dup=0 drop=211 
    
frame=212060 fps= 30 q=4.0 size= 6960692kB time=01:57:55.66 bitrate=8058.9kbits/s dup=0 drop=211 
    
espnhd.avs: Not enough space
    
[output stream 0:0 @ 02f02220] EOF on sink link output stream 0:0:default.
    
[output stream 0:1 @ 02f10c20] EOF on sink link output stream 0:1:default.
    
No more output streams to write to, finishing.
    
frame=212069 fps= 30 q=4.0 Lsize= 6961519kB time=01:57:56.00 bitrate=8059.5kbits/s dup=0 drop=211 
    

    
video:6196482kB audio:221125kB subtitle:0 global headers:0kB muxing overhead 8.475312%
    
424560 frames successfully decoded, 0 decoding errors
    
[AVIOContext @ 02f8c3e0] Statistics: 0 seeks, 4977161 writeouts
    
[AVIOContext @ 02f032a0] Statistics: 229 bytes read, 0 seeks

    I really appreciate some help.
    Thanks.

  • flutter : Getting width and height of video using

    2 mai 2019, par ebg11

    I am trying to retrieve the width and height of a video using flutter. I have tried using ffmpeg

    _flutterFFmpeg.getMediaInformation(file.path);

    but the width and height are occasionally flipped. I have noticed
    "rotate" -> "90" and "displaymatrix" -> "rotation of -90.00 degrees" are present in the meta data returned.

    Is there a bug free method of using the rotate/display matrix to determine the true width/height of the video or is there a better method/library that can help me here ?

    Thanks.

  • libavformat/mpegts : expose raw packet size

    19 décembre 2013, par Leandro Dorileo
    libavformat/mpegts : expose raw packet size

    We cannot easily determine if an mpeg TS’s packet size is DVHS, FEC
    
or so on, for that we need to expose the internal raw_packet_size
    
field.
    

    Signed-off-by : Leandro Dorileo <leandro.maciel.dorileo@intel.com>
    
Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavformat/mpegts.c

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