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• Burn subtitles in a stop motion video, with hardware acceleration

  9 février 2020, par Belinde

  I’m trying to make a year long stop motion video with the images taken from a webcam. I’ve created a input.txt file with this format inside :

  ffconcat version 1.0
  
  
  
  file 'amianthe201909031230.jpg'
  
  duration 0.093034825870647
  
  
  
  file 'amianthe201909031330.jpg'
  
  duration 0.093034825870647

  The command I’ve crafted (mostly taken from the example in the official ffmpeg documentation) is :

  ffmpeg \
  
      -y \
  
      -hwaccel vaapi \
  
      -hwaccel_device /dev/dri/renderD128 \
  
      -hwaccel_output_format vaapi \
  
      -f concat \
  
      -i input.txt \
  
      -vf 'hwmap=mode=read+write+direct,format=nv12,ass=subtitles.ass,hwmap' \
  
      -c:v h264_vaapi \
  
      ~/amianthe.mp4

  But it badly fails with this output :

  ffmpeg version 4.1.4-1build2 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9 (Ubuntu 9.2.1-4ubuntu1)
  
    configuration: --prefix=/usr --extra-version=1build2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  Input #0, concat, from 'input.txt':
  
    Duration: 00:00:18.70, start: 0.000000, bitrate: 5 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1920x1080 [SAR 1:1 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (h264_vaapi))
  
  Press [q] to stop, [?] for help
  
  [Parsed_ass_2 @ 0x5557f4ec4ac0] Shaper: FriBidi 0.19.7 (SIMPLE) HarfBuzz-ng 2.6.1 (COMPLEX)
  
  [Parsed_ass_2 @ 0x5557f4ec4ac0] Using font provider fontconfig
  
  [Parsed_ass_2 @ 0x5557f4ec4ac0] Added subtitle file: 'subtitles.ass' (4 styles, 2 events)
  
  [Parsed_hwmap_3 @ 0x5557f5381ec0] Unsupported formats for hwmap: from nv12 (vaapi_vld) to vaapi_vld.
  
  [Parsed_hwmap_3 @ 0x5557f5381ec0] Failed to configure output pad on Parsed_hwmap_3
  
  Error reinitializing filters!
  
  Failed to inject frame into filter network: Invalid argument
  
  Error while processing the decoded data for stream #0:0
  
  Conversion failed!

  I’m honestly lost : from my understanding, all the elaboration should be done directly in the video card memory, so I don’t understand why it’s converting the surface format. Is there some other parameter I must put in format ? What am I missing ?

• ffmpeg to Youtube Live stops working. ffmpeg continues to run

  10 février 2020, par Robert Pringle

  I’m streaming a mobotix camera to Youtube Live.

  This works correctly for a period of time. Youtube then reports the stream as "noData".
  ffmpeg continues to run, but no video is being received by Youtube.

  The problem is intermittant.

  Restarting the ffmpeg process makes Youtube start receiving the stream again.

  ffmpeg is being run as a systemd service.

  ffmpeg is run with the following command :

  ffmpeg -nostdin  -f lavfi  -i anullsrc  -rtsp_transport tcp -thread_queue_size 512 -i "rtsp://@192.168.1.1:554/mobotix.h264"   -tune zerolatency  -vcodec libx264  -pix_fmt + -c:v copy  -c:a aac  -strict experimental  -f flv rtmp://a.rtmp.youtube.com/live2/

  Logs only show : ffmpeg[47357]: [48.0K blob data]

  Any ideas on how to solve this ? Or improve the logging.

  Edit :
  Logs from starting ffmpeg :

      Feb 07 17:57:00 localhost.localdomain ffmpeg[49525]: [48.0K blob data]
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:       encoder         : Lavc58.54.100 aac
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:     Metadata:
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:     Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:     Stream #0:0: Video: h264 (Constrained Baseline) ([7][0][0][0] / 0x0007), yuv420p(progressive), 1024x768, q=2-31, 12.50 tbr, 1k tbn, 90k tbc
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:     encoder         : Lavf58.29.100
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:   Metadata:
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]: Output #0, flv, to 'rtmp://a.rtmp.youtube.com/live2/':
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:   Stream #0:0 -> #0:1 (pcm_u8 (native) -> aac (native))
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:   Stream #1:0 -> #0:0 (copy)
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]: Stream mapping:
  
      Feb 07 17:52:46 localhost.localdomain ffmpeg[49525]:     Stream #1:0: Video: h264 (Constrained Baseline), yuv420p(progressive), 1024x768, 12.50 tbr, 90k tbn, 180k tbc
  
      Feb 07 17:52:46 localhost.localdomain ffmpeg[49525]:   Duration: N/A, start: 136.139322, bitrate: N/A
  
      Feb 07 17:52:46 localhost.localdomain ffmpeg[49525]:     comment         : mobotix.h264
  
      Feb 07 17:52:46 localhost.localdomain ffmpeg[49525]:     title           : Mobotix IP-Camera (H.264, unicast)
  
      Feb 07 17:52:46 localhost.localdomain ffmpeg[49525]:   Metadata:
  
      Feb 07 17:52:46 localhost.localdomain ffmpeg[49525]: Input #1, rtsp, from 'rtsp://@192.168.1.1:554/mobotix.h264':
  
      Feb 07 17:52:44 localhost.localdomain ffmpeg[49525]: [h264 @ 0x559ee7857940] concealing 2400 DC, 2400 AC, 2400 MV errors in P frame
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:     Stream #0:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   Duration: N/A, start: 0.000000, bitrate: 705 kb/s
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]: Input #0, lavfi, from 'anullsrc':
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libpostproc    55.  5.100 / 55.  5.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libswresample   3.  5.100 /  3.  5.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libswscale      5.  5.100 /  5.  5.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libavresample   4.  0.  0 /  4.  0.  0
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libavfilter     7. 57.100 /  7. 57.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libavdevice    58.  8.100 / 58.  8.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libavformat    58. 29.100 / 58. 29.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libavcodec     58. 54.100 / 58. 54.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libavutil      56. 31.100 / 56. 31.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 >
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   built with gcc 8 (GCC)
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]: ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers

  Running the command manually gave me logs and exited, whereas the systemd service keeps running.

      [flv @ 0x560541a8b3c0] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
      av_interleaved_write_frame(): Broken pipekB time=03:35:18.84 bitrate=3131.8kbits/s speed=0.999x    
  
          Last message repeated 1 times
  
      [flv @ 0x560541a8b3c0] Failed to update header with correct duration.
  
      [flv @ 0x560541a8b3c0] Failed to update header with correct filesize.
  
      Error writing trailer of rtmp://a.rtmp.youtube.com/live2/: Broken pipe
  
      frame=134427 fps= 10 q=-1.0 Lsize= 4938869kB time=03:35:18.96 bitrate=3131.8kbits/s speed=0.997x    
  
      video:4923745kB audio:3296kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.240068%
  
      [aac @ 0x560541a6d680] Qavg: 65536.000
  
      Conversion failed!

• ERROR:Output file #0 does not contain any stream (ffmpeg)

  27 décembre 2023, par Ali Asgher Badshah

  I am trying to make a thumbnail image from mp4 video using FFmpeg but I am getting the error that

  


  


  Output #0, image2, to 'output.jpg' :

  


  Output file #0 does not contain any stream

  


  


  the command I used is

  


  ffmpeg -i file_example_MP4_700KB.mp4 -ss 00:00:01 -vf thumbnail,scale=200:115 -qscale:v 2 -frames:v 1 -f image2 -c:v mjpeg output.jpg


  


  and I am not sure what I am doing wrong and I stuck throw it for so long.
Any suggestions will be good

  


  I am using Ubuntu 18.*

  


  full logs :-

  


  ffmpeg version n4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
 configuration: --prefix= --prefix=/usr --disable-debug --disable-doc --disable-static --enable-avisynth --enable-cuda --enable-cuvid --enable- libdrm --enable-ffplay --enable-gnutls --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopus --enable-libpulse --enable-sdl2 --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-nonfree --enable-nvenc --enable-omx --enable-openal --enable-opencl --enable-runtime-cpudetect --enable-shared --enable-vaapi --enable-vdpau --enable-version3 --enable-xlib
libavutil      56. 22.100 / 56. 22.100
libavcodec     58. 35.100 / 58. 35.100
libavformat    58. 20.100 / 58. 20.100
libavdevice    58.  5.100 / 58.  5.100
libavfilter     7. 40.101 /  7. 40.101
libswscale      5.  3.100 /  5.  3.100
libswresample   3.  3.100 /  3.  3.100
libpostproc    55.  3.100 / 55.  3.100
Input #0, mp3, from 'file_example_MP3_700KB.mp3':
Metadata:
genre           : Cinematic
album           : YouTube Audio Library
title           : Impact Moderato
artist          : Kevin MacLeod
Duration: 00:00:27.25, start: 0.034531, bitrate: 224 kb/s
Stream #0:0: Audio: mp3, 32000 Hz, stereo, fltp, 224 kb/s
Metadata:
  encoder         : LAME3.99r
Output #0, image2, to 'output.jpg':
Output file #0 does not contain any stream