Talk:KTMF

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It's 1/1/7 and I have the antenna enabled and KTMF is being received over Channel 23.1. It's analog. Dang, I was hoping to watch the Rose Bowl in clear, crisp high definition. And Michigan has to punt. Libretto 22:17, 1 January 2007 (UTC)libretto

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Video Formats

Looking at the multiplexed video stream, it seems that SWX (program ID 0x51) is now broadcast in 720p along with the others. ffmpeg shows all three subchannels using the same video format:

Input #0, mpegts, from 'pipe:':
  Duration: N/A, start: 79919.988156, bitrate: N/A
  Program 1 
  Stream #0:3[0x31]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], Closed Captions, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
    Side data:
      cpb: bitrate max/min/avg: 80000000/0/0 buffer size: 7995392 vbv_delay: N/A
  Stream #0:4[0x34](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s
  Program 2 
  Stream #0:0[0x41]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], Closed Captions, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
    Side data:
      cpb: bitrate max/min/avg: 80000000/0/0 buffer size: 7995392 vbv_delay: N/A
  Stream #0:1[0x44](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s
  Program 3 
  Stream #0:2[0x51]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], Closed Captions, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
    Side data:
      cpb: bitrate max/min/avg: 80000000/0/0 buffer size: 7995392 vbv_delay: N/A
  Stream #0:5[0x54](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s
  Program 4 
  Stream #0:6[0x61]: Video: mpeg2video ([2][0][0][0] / 0x0002), none, 90k tbr, 90k tbn
  Stream #0:7[0x64]: Audio: ac3 ([129][0][0][0] / 0x0081), 0 channels
  Stream #0:8[0x65]: Audio: ac3 ([129][0][0][0] / 0x0081), 0 channels

However, if I play the direct stream of any of the subchannels, sometimes it has interlacing bars as an artifact in the video, despite the stream claiming progressive scan. I guess I'll leave it as progressive for now, could maybe be a format issue with the playout and not on my end.

Voidkat (talk) 23:20, 20 December 2021 (UTC)