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• FFMPEG MKV Causing Errors in DASH JS

  24 juin 2018, par Mike

  I’m getting the following browser errors (on all browsers) using Dash JS when transcoding and MKV file :

  ERROR DOMException: Failed to read the 'buffered' property from 'SourceBuffer': This SourceBuffer has been removed from the parent media source.

  and...

  dash.all.min.js:26 Uncaught (in promise) DOMException: Failed to load because no supported source was found.

  What’s weird is I have no issues when I transcode a MP4 file. I’m using FFMPEG in conjunction with Bento4 to build MPEG DASH and HLS files for my video player.

  What I did to single out FFMPEG was to transcode a video that gave me errors on my test server on my local machine (which works) and start the Bento4 process on that file. Doing that, I had no issues and everything played just fine.

  I have removed FFMPEG and reinstalled it multiple times and I always get the same result. I’m sure I screwed something up on my server, but for the life of me I can’t seem to figure out where to start with fixing the issue.

  FFMPEG Version

  ffmpeg version N-91321-ge85c608 Copyright (c) 2000-2018 the FFmpeg developers
  
  
  
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-28)
  
  
  
  configuration: 
  
  --prefix=/root/ffmpeg_build 
  
  --pkg-config-flags=--static 
  
  --extra-cflags=-I/root/ffmpeg_build/include 
  
  --extra-ldflags=-L/root/ffmpeg_build/lib 
  
  --extra-libs=-lpthread 
  
  --extra-libs=-lm 
  
  --bindir=/root/bin 
  
  --enable-gpl 
  
  --enable-libfdk_aac 
  
  --enable-libfreetype 
  
  --enable-libmp3lame 
  
  --enable-libopus 
  
  --enable-libvorbis 
  
  --enable-libtheora 
  
  --enable-libx264 
  
  --enable-nonfree
  
  libavutil      56. 18.102 / 56. 18.102
  
  libavcodec     58. 20.102 / 58. 20.102
  
  libavformat    58. 17.100 / 58. 17.100
  
  libavdevice    58.  4.101 / 58.  4.101
  
  libavfilter     7. 25.100 /  7. 25.100
  
  libswscale      5.  2.100 /  5.  2.100
  
  libswresample   3.  2.100 /  3.  2.100
  
  libpostproc    55.  2.100 / 55.  2.100

  FFMPEG Command

  ffmpeg 
  
  -i ${DIRECTORY}/${INPUT_FILE} 
  
  -progress ${DIRECTORY}/transcode.log 
  
  -s 1920x1080 
  
  -c:v libx264 
  
  -b:v 3000k 
  
  -c:a aac 
  
  -b:a 32k 
  
  -minrate 3000k 
  
  -maxrate 3000k 
  
  -bufsize 6000k 
  
  -g 96 
  
  -keyint_min 96 
  
  -sc_threshold 0 
  
  -profile:v high 
  
  -flags +cgop 
  
  -movflags faststart 
  
  -preset ultrafast 
  
  -pix_fmt yuv420p 
  
  ${DIRECTORY}/ffmpeg_1920_1080_3000.mp4 &> ${DIRECTORY}/ffmpeg.log

  Also, I get no errors and and if I access the output files directly, they play just fine.

  I’m sure I’m not including all the information needed to troubleshoot this, so let me know if there is better information I can provide.

  What would cause FFMPEG to transcode MP4 and not MKV ?

  EDIT
  One last thing, I converted the MKV to an MP4 then used the above command and it worked. It’s like MP4 to MP4 is fine, but MKV to MP4 is broke.

• Motion : Raspian webcam Unable to find a compatible palette format

  25 juin 2018, par mrtumnus

  I am trying to get a Creative Live ! Motion webcam working on a Raspberry Pi 3 B+. fswebcam and motion both give an error, "Unable to find a compatible palette format". ffmpeg, on the other hand, is able to easily capture video from the webcam.

  Device info :

  $ lsusb
  
  Bus 001 Device 004: ID 041e:4041 Creative Technology, Ltd Webcam Live! Motion`
  
  
  
  $ v4l2-ctl --all
  
  Driver Info (not using libv4l2):
  
      Driver name   : sq930x
  
      Card type     : Creative WebCam Live! Motion
  
      Bus info      : usb-3f980000.usb-1.2
  
      Driver version: 4.14.34
  
      Capabilities  : 0x85200001
  
              Video Capture
  
              Read/Write
  
              Streaming
  
              Extended Pix Format
  
              Device Capabilities
  
      Device Caps   : 0x05200001
  
              Video Capture
  
              Read/Write
  
              Streaming
  
              Extended Pix Format
  
  Priority: 2
  
  Video input : 0 (sq930x: ok)
  
  Format Video Capture:
  
      Width/Height      : 640/480
  
      Pixel Format      : 'RGGB'
  
      Field             : None
  
      Bytes per Line    : 640
  
      Size Image        : 307200
  
      Colorspace        : sRGB
  
      Transfer Function : Default
  
      YCbCr/HSV Encoding: Default
  
      Quantization      : Default
  
      Flags             :
  
  Streaming Parameters Video Capture:
  
      Frames per second: invalid (0/0)
  
      Read buffers     : 2
  
  
  
  User Controls
  
  
  
                     exposure (int)    : min=1 max=4095 step=1 default=854 value=854
  
                         gain (int)    : min=1 max=255 step=1 default=141 value=141

  Log of motion failure to open device :

  $ cat /var/log/motion/motion.log
  
  [0:motion] [NTC] [ALL] [Jun 24 16:16:42] motion_startup: Using log type (ALL) log level (NTC)
  
  [0:motion] [NTC] [ENC] [Jun 24 16:16:42] ffmpeg_init: ffmpeg libavcodec version 57.48.101 libavformat version 57.41.100
  
  [0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Motion running in setup mode.
  
  [0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Camera 0 is from /etc/motion/motion.conf
  
  [0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Camera 0 is device: /dev/video0 input -1
  
  [0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Stream port 8081
  
  [0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Waiting for threads to finish, pid: 12067
  
  [0:web_control] [NTC] [STR] [Jun 24 16:16:42] http_bindsock: listening on 127.0.0.1 port 8080
  
  [1:ml1] [NTC] [ALL] [Jun 24 16:16:42] motion_init: Camera 0 started: motion detection Enabled
  
  [0:web_control] [NTC] [STR] [Jun 24 16:16:42] httpd_run: Started motion-httpd server on port 8080 (auth Disabled)
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:42] vid_v4lx_start: Using videodevice /dev/video0 and input -1
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability:
  
  ------------------------
  
  cap.driver: "sq930x"
  
  cap.card: "Creative WebCam Live! Motion"
  
  cap.bus_info: "usb-3f980000.usb-1.2"
  
  cap.capabilities=0x85200001
  
  ------------------------
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability: - VIDEO_CAPTURE
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability: - READWRITE
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability: - STREAMING
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_select_input: name = "sq930x", type 0x00000002, status 00000000
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_select_input: - CAMERA
  
  [1:ml1] [WRN] [VID] [Jun 24 16:16:42] v4l2_select_input: Device doesn't support VIDIOC_G_STD
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: Config palette index 17 (YU12) doesn't work.
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: Supported palettes:
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: (0) RGGB (8-bit Bayer RGRG/GBGB)
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: 0 - 8-bit Bayer RGRG/GBGB (compressed : 0) (0x42474752)
  
  [1:ml1] [ERR] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: Unable to find a compatible palette format.
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:42] vid_v4lx_start: Using V4L1
  
  [1:ml1] [NTC] [ALL] [Jun 24 16:16:42] image_ring_resize: Resizing pre_capture buffer to 1 items
  
  [1:ml1] [ERR] [ALL] [Jun 24 16:16:52] motion_init: Error capturing first image
  
  [1:ml1] [NTC] [STR] [Jun 24 16:16:52] http_bindsock: listening on 127.0.0.1 port 8081
  
  [1:ml1] [NTC] [ALL] [Jun 24 16:16:52] motion_init: Started motion-stream server on port 8081 (auth Disabled)
  
  [1:ml1] [ERR] [ALL] [Jun 24 16:16:52] motion_loop: Video device fatal error - Closing video device
  
  [1:ml1] [NTC] [VID] [Jun 24 16:16:52] vid_close: Closing video device /dev/video0

  Successful ffmpeg recording :

  $ ffmpeg -i /dev/video0 test.mp4
  
  ffmpeg version 3.2.10-1~deb9u1+rpt1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1) 20170516
  
    configuration: --prefix=/usr --extra-version='1~deb9u1+rpt1' --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --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-libxvid --enable-libzmq --enable-libzvbi --enable-omx-rpi --enable-mmal --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  [video4linux2,v4l2 @ 0x16035c0] Time per frame unknown
  
  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 2523.746120, bitrate: N/A
  
      Stream #0:0: Video: rawvideo ([186]RG[8] / 0x84752BA), bayer_rggb8, 640x480, 25.42 tbr, 1000k tbn, 1000k tbc

  ---

  Related questions :

  Raspberry Pi webcam unable to open video device

  webcam Unable to find a compatible palette format

• FFmpeg add caption to top of video like memes

  25 juin 2018, par Praveen Tamil

  I’m trying to add a top section to a video like we do for image memes. I’m using drawtext option for that but the text is wrapped in output video.

  Let’s say I have a video and I need to add the caption like this to the whole video. How can i achieve this ?

  Expected output
  

  Resulted output

  I use below command for above result

  ffmpeg -ss 20 -i  D:\21-03-2018\15271618235b06a3df9d5cb.mp4 -filter_complex "[0:v]pad=iw:ih+50:0:50:color=white, drawtext=text='Meme Top Text will go here but it\\\\\'s a long text with multi line option. Line 1 text \n line 2 text \n line 3 text':fix_bounds=true:fontfile=Arial.ttf:fontsize=30:fontcolor=black:x=(w-tw)/2:y=(50-th)/2" -vframes 1 D:\21-03-2018\output.jpg