Starting to wonder if Comcast is really planning to convert all channels versus a subset.
As I recall, I was forced to swap my HD box by 01/31/16 because my older box didn't support h264 and I was starting to get only audio and black screen as channels got converted. I suspect they actually started converting my area to h264 much earlier. Given that, I estimate that here we're at least 8-10 months into the h264 migration. However, I just did a quick test capture of a handful of channels. I'm still getting a number of what I consider 'major' channels in mpeg2/1920x1080. CNN and HLN are already h264/1280x720, though, with bitrates of approximately 3500 kb/s.
ABC-HD
Duration: 00:00:51.53, start: 76626.922589, bitrate: 26543 kb/s Stream #0:0[0x14f5]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv), 1280x720 [SAR 1:1 DAR 16:9], Closed Captions, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
CBS-HD
Duration: 00:00:44.41, start: 76280.270133, bitrate: 26675 kb/s Stream #0:1[0x1428]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], Closed Captions, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
CNN-HD
Duration: 00:00:38.14, start: 0.000000, bitrate: 3553 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], Closed Captions, 3174 kb/s, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc (default)
HLN-HD
Duration: 00:00:38.02, start: 0.000000, bitrate: 3560 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], Closed Captions, 3199 kb/s, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc (default)
NBC-HD
Duration: 00:00:48.48, start: 76471.525367, bitrate: 26696 kb/s Stream #0:1[0x1217]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv), 1920x1080 [SAR 1:1 DAR 16:9], Closed Captions, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
NBCSports-HD
Duration: 00:00:51.11, start: 34665.444300, bitrate: 26692 kb/s Stream #0:1[0x1012]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv), 1920x1080 [SAR 1:1 DAR 16:9], Closed Captions, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
WGN-HD
Duration: 00:00:52.92, start: 79213.868178, bitrate: 26611 kb/s Stream #0:1[0x14f2]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], Closed Captions, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
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