[FFmpeg-user] Need assistance finding l transcoding

[James E. Baird]

Carl,

Thanks for the suggestions so far. I suspect there is something in that command that is causing the high CPU usage. Maybe there is a better way to structure the command. I spun up a new server running Ubuntu 18.04.1 LTS and installed FFMPEG version 7.3.4.4 which is the current supported version for Bionic Beaver.

I tried what you said and output to NULL with the same results in regards to the CPU usage so I don’t think it’s the re-pack to UDP multicast.

======== OUTPUT ==================
transcoder:~$ ffmpeg -i 'udp://@239.129.2.110:59110?fifo_size=1000000&overrun_nonfatal=1' -c:v libx264 -x264opts keyint=120:no-scenecut -b:v 6000k -profile:v high -c:a aac -f null /dev/null
ffmpeg version 3.4.4-0ubuntu0.18.04.1 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mpeg2video @ 0x55d5c951cec0] Invalid frame dimensions 0x0.
    Last message repeated 13 times
Input #0, mpegts, from 'udp://@239.129.2.110:59110?fifo_size=1000000&overrun_nonfatal=1':
  Duration: N/A, start: 89749.701144, bitrate: N/A
  Program 3
    Stream #0:0[0x31]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709, bottom first), 1280x720 [SAR 1:1 DAR 16:9], Closed Captions, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
    Stream #0:1[0x34](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 384 kb/s
    Stream #0:2[0x35](spa): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 128 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (ac3 (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x55d5c9a46980] using SAR=1/1
[libx264 @ 0x55d5c9a46980] using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX XOP FMA4
[libx264 @ 0x55d5c9a46980] profile High, level 3.2
Output #0, null, to '/dev/null':
  Metadata:
    encoder         : Lavf57.83.100
    Stream #0:0: Video: h264 (libx264), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 6000 kb/s, 59.94 fps, 59.94 tbn, 59.94 tbc
    Metadata:
      encoder         : Lavc57.107.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/6000000 buffer size: 0 vbv_delay: -1
    Stream #0:1(eng): Audio: aac (LC), 48000 Hz, 5.1(side), fltp, 341 kb/s
    Metadata:
      encoder         : Lavc57.107.100 aac
frame= 2917 fps= 49 q=31.0 size=N/A time=00:00:48.91 bitrate=N/A speed=0.828x


Thoughts?
-Jimbo
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