HEVC TV Channels and Transcoding

[sub]

What output do you get from ffmpeg if run the follow command in a command prompt:

Code:

"C:\Program Files\NextPVR\Other\ffmpeg.exe" -y   -i http://127.0.0.1:8867/live?channeloid=8503&transcoder=845f8e17-03d8-4419-a0bb-a2eeaa6e109b&sid=3bca6dab-62e8-4143-9772-8489d9cdcc16&client=3bca6dab-62e8-4143-9772-8489d9cdcc16 -map_metadata -1 -threads 0 -ignore_unknown  -map 0:v:0? -map 0:m:language:eng? -map 0:a:0 -map -0:s -codec:v:0 libx264 -pix_fmt yuv420p -preset superfast -crf 23 -vf yadif=0:-1:0 -b:v 4000000 -maxrate 4000000 -bufsize 8000000 -vsync vfr -profile:v high -level 41 -force_key_frames "expr:gte(t,n_forced*3)" -s 1280x720   -flags -global_header -sc_threshold 0 -codec:a:0 aac -strict experimental -ac 2 -ab 192000 c:\temp\test.ts

(will need to create a c:\temp directory)

[The Solutor]

Code:

C:\Users\me>"C:\Program Files\NextPVR\Other\ffmpeg.exe" -y   -i http://127.0.0.1:8867/live?channeloid=8503&transcoder=845f8e17-03d8-4419-a0bb-a2eeaa6e109b&sid=3bca6dab-62e8-4143-9772-8489d9cdcc16&client=3bca6dab-62e8-4143-9772-8489d9cdcc16 -map_metadata -1 -threads 0 -ignore_unknown  -map 0:v:0? -map 0:m:language:eng? -map 0:a:0 -map -0:s -codec:v:0 libx264 -pix_fmt yuv420p -preset superfast -crf 23 -vf yadif=0:-1:0 -b:v 4000000 -maxrate 4000000 -bufsize 8000000 -vsync vfr -profile:v high -level 41 -force_key_frames "expr:gte(t,n_forced*3)" -s 1280x720   -flags -global_header -sc_threshold 0 -codec:a:0 aac -strict experimental -ac 2 -ab 192000 c:\temp\test.ts
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.2.1 (GCC) 20200122
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[tcp @ 0035eb00] Connection to tcp://127.0.0.1:8867 failed: Error number -138 occurred
http://127.0.0.1:8867/live?channeloid=8503: Unknown error
"transcoder" non è riconosciuto come comando interno o esterno,
un programma eseguibile o un file batch.
"sid" non è riconosciuto come comando interno o esterno,
un programma eseguibile o un file batch.
"client" non è riconosciuto come comando interno o esterno,
un programma eseguibile o un file batch.

[mvallevand]

The problem is these test streams likely do not have audio or they might be ac4

2021-07-24 23:42:30.914 [DEBUG][16] [FFMPEG]: Stream map '0:a:0' matches no streams.

and there is no provision in NextPVR for video only streams. I think that needs -map 0:a:0?

Martin

[The Solutor]

The problem is these test streams likely do not have audio or they might be ac4

2021-07-24 23:42:30.914 [DEBUG][16] [FFMPEG]: Stream map '0:a:0' matches no streams.

and there is no provision in NextPVR for video only streams.  I think that needs -map 0:a:0?

Martin

Correct, just a video test frame

So likely the problem is not a problem at all

[sub]

Yeah, probably not a problem. If you had audio it would likely work.

[The Solutor]

Ok I'll keep in mind this thread and I repost here when a real HEVC channel will be available.,to confirm everything is working

(maybe something that already happened and I missed it)

Thanks again

[sub]

I'm pretty sure we've had a couple of real world tests on HEVC channels in the past (from Germany test channels, and from set top box using HEVC video encoder)

[The Solutor]

Very good.

But, you know, in the IT you never get anything for granted before some test.

Even the smallest variation on the compression schemes across the nations can provide troubles, on Friday the 13th

[sub]

Yes, absolutely. We'll worry about it when we see real-world examples causing issues though.

[mvallevand]

HEVC transcoding is working for me with my HEVC streams. It is not optimized and doesn't factor in browsers like Safari which can play HEVC.

Martin