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• Revision 6522 : $GLOBALS[’liste_des_forums’] a disparu

  12 juin 2012, par kent1 — Log

  $GLOBALSliste_des_forums ? a disparu

• Parse closed captions from H264 stream (HDHomeRun)

  5 mai 2018, par Ladinn

  I’ve been researching on here and other websites for the past few days and haven’t found anything that accomplishes exactly what I’m looking for.

  I have an HDHomeRun that transmits cable TV over LAN. I’m hoping to parse only the closed captioning and get the text output. I’ll eventually be using Fluent FFmpeg so I would hope that the text can be easily piped through there or to a text file.

  Here is the output of ffprobe :

  Input #0, mpegts, from 'http://10.0.0.10:5004/auto/v819':
 Duration: N/A, start: 32788.639133, bitrate: N/A
 Program 6
   Stream #0:0[0x18f0]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], Closed Captions, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
   Stream #0:1[0x18f1](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, 5.1(side), fltp, 384 kb/s
   Stream #0:2[0x18f2]: Data: scte_35
   Stream #0:3[0x18f3]: Unknown: none (ETV1 / 0x31565445)
   Stream #0:4[0x18f4]: Unknown: none (ETV1 / 0x31565445)
   Stream #0:5[0x18f5]: Unknown: none ([192][0][0][0] / 0x00C0)

  As you can see, "Closed Captions" are on Stream #0:0. The captions appear on the VLC client, so I know they’re there.

  As mentioned I’m hoping to use FFmpeg, but VLC’s command line would work too.

  Thanks !

• Record UDP stream with ffmpeg video+klv-data

  26 septembre 2017, par mfreiholz

  I’d like to record an MPEGTS UDP stream with ffmpeg binary to disk.

  This works in a stable network :

  ffmpeg.exe -i "udp://224.10.10.10:15006?multicast=1&timeout=360000000&reuse=1" -f mpegts -map 0:0? -map 0:1? -map 0:2? -c copy "C:/test.ts"

  The entire stream is saved to test.ts.

  Live Environment

  In my live environment it is possible that the connection is very bad or is not available at all (cable disconnect, device reboot, ...) for a few minutes. I want ffmpeg to simply continue writing upcoming frames to *.ts file. I don’t need the lost frames.

  Currently the following errors appears, if there was a too long brake between UDP frames :

  [mpegts @ 00000000003cf920] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 11606399 >= 2084534
  
  av_interleaved_write_frame(): Invalid argument

  It looks like to be a problem with the timestamp. My idea would be to tell FFMPEG to ignore those errors and simply continue.

  Is it even possible with the ffmpeg binary or do I have to solve the problem with a custom C/C++ implementation using the library ?

  Thank you

  Update 1

  If I only record the video stream -map 0:0? and not the others it seems to work. Looks like the problem is associated with the second stream (No.1) which is KLV encoded data.