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• ffmpeg audio is stuttering when converting from h264 to mpeg2

  9 février 2019, par user11038211

  I want to convert from h264 stream source (streamlink) to mpeg2 video and send it to a DVB-T modulator (Hides UT100C). So far, I have managed to play the video smoothly, but audio is jerky. It sounds like parts are missing. I think that some parameters are not set perfectly :

  $streamlink -O https://zattoo.com/watch/orf-2 best | ffmpeg -re -i pipe:0 -vcodec mpeg2video -s 720x576 -r 30 -b:v 10M -b:a 64k -acodec mp2 -mpegts_original_network_id 1 -mpegts_transport_stream_id 1 -mpegts_service_id 1 -mpegts_pmt_start_pid 1000 -mpegts_start_pid 1001 -metadata service_provider="HOME" -metadata service_name="IPTV" -muxrate 10M -f mpegts -y tspipe | sudo ./tsrfsend tspipe 0 578000 8000 4 1/2 1/4 8 0 0
  
  
  
  [cli][info] Found matching plugin zattoo for URL https://zattoo.com/watch/orf-2
  
  [cli][info] Available streams: 600k_alt (worst), 600k, 900k, 1500k (best)
  
  [cli][info] Opening stream: 1500k (hls)
  
  Input #0, mpegts, from 'pipe:0':
  
    Duration: N/A, start: 45236.000000, bitrate: N/A
  
    Program 1
  
      Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(progressive), 768x432 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 128 kb/s
  
  
  
  Open /dev/usb-it950x0 ok
  
  g_ITEAPI_TxDeviceInit ok
  
  1 Devices
  
  g_ITEAPI_GetDrvInfo ok
  
  DriverInfo.DriverVerion  = v16.11.10.1
  
  DriverInfo.APIVerion     = 1.3.20160929.0
  
  DriverInfo.FWVerionLink  = 255.39.2.0
  
  DriverInfo.FWVerionOFDM  = 255.9.11.0
  
  DriverInfo.Company       = ITEtech
  
  DriverInfo.SupportHWInfo = Eagle DVBT
  
  DriverInfo.ProductID     = 0x9507
  
  Frequency = 578000 KHz
  
  Bandwidth = 8000 MHz
  
  Constellation: QPSK
  
  Code Rate: 1/2
  
  Interval: 1/4
  
  Transmission Mode: 8K
  
  Output #0, mpegts, to 'tspipe':
  
    Metadata:
  
      service_provider: HOME
  
      service_name    : IPTV
  
      encoder         : Lavf57.56.101
  
      Stream #0:0: Video: mpeg2video (Main), yuv420p, 720x576 [SAR 64:45 DAR 16:9], q=2-31, 10000 kb/s, 30 fps, 90k tbn, 30 tbc
  
      Metadata:
  
        encoder         : Lavc57.64.101 mpeg2video
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/10000000 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 64 kb/s
  
      Metadata:
  
        encoder         : Lavc57.64.101 mp2
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> mpeg2video (native))
  
    Stream #0:1 -> #0:1 (aac (native) -> mp2 (native))
  
  Channel Capacity is 4976172 bps
  
  MinGain: -52, MaxGain: 5
  
  frame=    3 fps=0.0 q=2.0 size=      63kB time=00:00:00.38 bitrate=1337.3kbits/s

  Tsrfsend is the application that sends the generated ts stream over a named pipe to the USB modulator.

  I also tried various audio bitrates such as 64, 192, 384k but all is very similar.

• Codec h264_cuvid is not supported

  9 septembre 2019, par gn cavalry

  ======================= Environment =======================
  System : ubuntu 18.04
  Architecture : x86_64
  Display Card : NVIDIA GeForce 820m
  Display Card Driver : NVIDIA-Linux-x86_64-390.87
  gcc : 6.5.0
  CUDA : 9.1.85 (also tried 9.0.176)
  FFmpeg : 3.4 (also tried 4.0, 4.1)

  ==================== FFmpeg Compilation ====================

  ./configure \
  
    --prefix="$DIR_BUILD" \
  
    --bindir="$DIR_BIN" \
  
    --enable-cuda \
  
    --enable-cuvid \
  
    --enable-nvenc \
  
    --enable-nonfree \
  
    --enable-libnpp \
  
    --extra-cflags=-I/usr/local/cuda/include \
  
    --extra-ldflags=-L/usr/local/cuda/lib64

  ======================= Verification =======================
  Driver Verification :
  (I have downgrade my gcc from 7.3 to 6.5, I don’t know why there still shows gcc version 7.3)

  $ cat /proc/driver/nvidia/version
  
  NVRM version: NVIDIA UNIX x86_64 Kernel Module  390.87  Tue Aug 21 12:33:05 PDT 2018
  
  GCC version:  gcc version 7.3.0 (Ubuntu 7.3.0-27ubuntu1~18.04)

  CUDA Verification :

  $nvcc -V
  
  nvcc: NVIDIA (R) Cuda compiler driver
  
  Copyright (c) 2005-2017 NVIDIA Corporation
  
  Built on Fri_Nov__3_21:07:56_CDT_2017
  
  Cuda compilation tools, release 9.1, V9.1.85
  
  
  
  $./deviceQuery
  
  Rsult = PASS
  
  
  
  $./bandwidthTest
  
  Result = PASS

  FFmpeg Decoder Verification :

  $ ffmpeg -codecs | grep cuvid
  
  ffmpeg version 3.4.5 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.5.0 (Ubuntu 6.5.0-2ubuntu1~18.04) 20181026
  
    configuration: --prefix=/home/cavalry/Downloads/compile_ffmpeg/ffmpeg_build --bindir=/home/cavalry/Downloads/compile_ffmpeg/bin --enable-cuda --enable-cuvid --enable-nvenc --enable-nonfree --enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64
  
    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
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
   DEV.LS h264                 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (decoders: h264 h264_v4l2m2m h264_vdpau h264_cuvid ) (encoders: h264_nvenc h264_v4l2m2m h264_vaapi nvenc nvenc_h264 )
  
   DEV.L. hevc                 H.265 / HEVC (High Efficiency Video Coding) (decoders: hevc hevc_cuvid ) (encoders: nvenc_hevc hevc_nvenc hevc_vaapi )
  
   DEVIL. mjpeg                Motion JPEG (decoders: mjpeg mjpeg_cuvid ) (encoders: mjpeg mjpeg_vaapi )
  
   DEV.L. mpeg1video           MPEG-1 video (decoders: mpeg1video mpeg1video_vdpau mpeg1_v4l2m2m mpeg1_cuvid )
  
   DEV.L. mpeg2video           MPEG-2 video (decoders: mpeg2video mpegvideo mpegvideo_vdpau mpeg2_v4l2m2m mpeg2_cuvid ) (encoders: mpeg2video mpeg2_vaapi )
  
   DEV.L. mpeg4                MPEG-4 part 2 (decoders: mpeg4 mpeg4_v4l2m2m mpeg4_vdpau mpeg4_cuvid ) (encoders: mpeg4 mpeg4_v4l2m2m )
  
   D.V.L. vc1                  SMPTE VC-1 (decoders: vc1 vc1_vdpau vc1_v4l2m2m vc1_cuvid )
  
   DEV.L. vp8                  On2 VP8 (decoders: vp8 vp8_v4l2m2m vp8_cuvid ) (encoders: vp8_v4l2m2m vp8_vaapi )
  
   DEV.L. vp9                  Google VP9 (decoders: vp9 vp9_v4l2m2m vp9_cuvid ) (encoders: vp9_vaapi )

  FFmpeg Encoder Verification :

  $ ffmpeg -codecs | grep nvenc 
  
  ffmpeg version 3.4.5 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.5.0 (Ubuntu 6.5.0-2ubuntu1~18.04) 20181026
  
    configuration: --prefix=/home/cavalry/Downloads/compile_ffmpeg/ffmpeg_build --bindir=/home/cavalry/Downloads/compile_ffmpeg/bin --enable-cuda --enable-cuvid --enable-nvenc --enable-nonfree --enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64
  
    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
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
   DEV.LS h264                 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (decoders: h264 h264_v4l2m2m h264_vdpau h264_cuvid ) (encoders: h264_nvenc h264_v4l2m2m h264_vaapi nvenc nvenc_h264 )
  
   DEV.L. hevc                 H.265 / HEVC (High Efficiency Video Coding) (decoders: hevc hevc_cuvid ) (encoders: nvenc_hevc hevc_nvenc hevc_vaapi )

  ================== Exec ffmepg command line ===================

  All things seem goes right, then I executed the following command :
  ffmpeg -c:v h264_cuvid -i ./holidy.mp4 output.mkv
  But it turns out :
  [h264_cuvid @ 0x55f93a512200] Codec h264_cuvid is not supported.

  Here is the whole information :

  $ ffmpeg -c:v h264_cuvid -i ./holidy.mp4 output.mkv
  
  ffmpeg version 3.4.5 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.5.0 (Ubuntu 6.5.0-2ubuntu1~18.04) 20181026
  
    configuration: --prefix=/home/cavalry/Downloads/compile_ffmpeg/ffmpeg_build --bindir=/home/cavalry/Downloads/compile_ffmpeg/bin --enable-cuda --enable-cuvid --enable-nvenc --enable-nonfree --enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64
  
    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
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './holidy.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 1
  
      compatible_brands: isomavc1iso6
  
      creation_time   : 2018-01-29T09:18:23.000000Z
  
      album           : Yinyuetai
  
      artist          : yinyuetai.com
  
      comment         : Yinyuetai-1TR1166
  
      date            : 01/29/18 17:18:23
  
    Duration: 00:04:15.21, start: 0.000000, bitrate: 4210 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 4087 kb/s, 24 fps, 24 tbr, 24k tbn, 48 tbc (default)
  
      Metadata:
  
        creation_time   : 2018-01-29T09:18:23.000000Z
  
        handler_name    : 264@GPAC0.5.1-DEV-rev5472
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 120 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-01-29T09:17:31.000000Z
  
        handler_name    : Sound Media Handler
  
  [h264_cuvid @ 0x55f3e05ca1c0] Codec h264_cuvid is not supported.
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (h264_cuvid) -> mpeg4 (native))
  
    Stream #0:1 -> #0:1 (aac (native) -> ac3 (native))
  
  Error while opening decoder for input stream #0:0 : Invalid argument

  I have tried width CUDA9.0, CUDA9.1, FFmpeg3.4, FFmpeg4.0, FFmpeg 4.1, but it reports the same error. Can anyone help me ? I will appreciate you greatly !

• using ffmpeg to live stream to Youtube

  6 septembre 2018, par Bruno Picardi

  I created an app in Windows to live stream the content of all the screen or only a portion of it (a Windows) to Youtube.
  I used this app but I still have a problem I’m not able to understand.
  I use different internet connections : ADSL at home 30Mbit, or ADSL router outside ad 2.5Mbit.
  In any case, after starting ffmpeg to live stream the fps strats growing from 300 to 2000 the transmission is perfect for some minutes, then the fps slowdown until a very low value for the bitrate of the Youtube streaming. The image is no more clear and disappears, the audio is still working. The CPU is still under the 35-40% of usage.
  ffmpeg must be restarted to get another 5-7 minutes of good transmission.
  I tryed changing the ffmpeg command line but nothing seams to influence this behaviour.
  This is because I still don’t undestand Where the problem is. Any suggestions ?
  A log of a single session (aprox. 20 minutes) is available here http://www.mbinet.it/public/ffmpeg-20180106-094446.txt
  Another (aprox. 5 min.) is available here http://www.mbinet.it/public/ffmpeg-20180106-105529.txt
  Thanks