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• Streaming audio + still image using ffmpeg

  21 juin 2017, par AEnimaH

  I’m streaming an audio source to azure media services using RTMP and a raspberry pi. This works great using this command :

  ffmpeg -f alsa -ac 1 -i hw:1,0 -c:a aac -b:a 128k -ar 44100 -f flv rtmp://...

  But know we want to add an image to this flv container because azure media player wants a video component.

  So I added video using this command :

  ffmpeg -loop 1 -i image.png -f alsa -ac 1 -i hw:1,0 -c:a aac -b:a 128k -ar 44100 -g 50 -pix_fmt yuv420p -f flv rtmp://...

  Yet it crashes with following log :

  ffmpeg version N-86429-gf8593c2 Copyright (c) 2000-2017 the FFmpeg developers
  
  built with gcc 4.9.2 (Raspbian 4.9.2-10)
  
  configuration: --prefix=/home/pi/ffmpeg/dependencies/output --enable-gpl --enable-libx264 --enable-libmp3lame --enable-nonfree --extra-cflags=-I/home/pi/ffmpeg/dependencies/output/include --extra-ldflags=-L/home/pi/ffmpeg/dependencies/output/lib --extra-libs='-lx264 -lpthread -lm -ldl'
  
  libavutil      55. 63.100 / 55. 63.100
  
  libavcodec     57. 98.100 / 57. 98.100
  
  libavformat    57. 73.100 / 57. 73.100
  
  libavdevice    57.  7.100 / 57.  7.100
  
  libavfilter     6. 91.100 /  6. 91.100
  
  libswscale      4.  7.101 /  4.  7.101
  
  libswresample   2.  8.100 /  2.  8.100
  
  libpostproc    54.  6.100 / 54.  6.100
  
  Input #0, png_pipe, from 'image.png':
  
  Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: png, rgba(pc), 600x400 [SAR 5669:5669 DAR 3:2], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Guessed Channel Layout for Input Stream #1.0 : mono
  
  Input #1, alsa, from 'hw:1,0':
  
  Duration: N/A, start: 1497522851.947685, bitrate: 768 kb/s
  
      Stream #1:0: Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb/s
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (png (native) -> flv1 (flv))
  
  Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [alsa @ 0x18e3330] Thread message queue blocking; consider raising the thread_queue_size option (current value: :sunglasses:
  
  Output #0, flv, to 'rtmp://aptus2-aptus.channel.mediaservices.windows.net:1935/live/b962f6df8d3b4e97a608981d019faaa4/default':
  
  Metadata:
  
      encoder         : Lavf57.73.100
  
      Stream #0:0: Video: flv1 (flv) ([2][0][0][0] / 0x0002), yuv420p(progressive), 600x400 [SAR 1:1 DAR 3:2], q=2-31, 200 kb/s, 25 fps, 1k tbn, 25 tbc
  
      Metadata:
  
      encoder         : Lavc57.98.100 flv
  
      Side data:
  
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, mono, fltp, 128 kb/s
  
      Metadata:
  
      encoder         : Lavc57.98.100 aac
  
  frame=    3 fps=0.0 q=2.0 size=      56kB time=00:00:00.08 bitrate=5700.0kbits/sframe=   12 fps= 12 q=2.0 size=      66kB time=00:00:00.44 bitrate=1227.2kbits/sframe=   21 fps= 14 q=2.0 size=      72kB time=00:00:00.80 bitrate= 739.8kbits/sframe=   29 fps= 14 q=2.0 size=      79kB time=00:00:01.12 bitrate= 573.9kbits/s[alsa @ 0x18e3330] ALSA buffer xrun.
  
  frame=   39 fps= 15 q=2.0 size=      85kB time=00:00:02.81 bitrate= 246.9kbits/sframe=   50 fps= 16 q=2.0 size=      86kB time=00:00:02.81 bitrate= 251.4kbits/sframe=   60 fps= 17 q=2.0 size=     157kB time=00:00:02.81 bitrate= 457.1kbits/sframe=   71 fps= 17 q=2.0 size=     159kB time=00:00:02.81 bitrate= 462.2kbits/s[alsa @ 0x18e3330] ALSA buffer xrun.
  
  frame=   81 fps= 18 q=2.0 size=     161kB time=00:00:04.57 bitrate= 289.0kbits/sframe=   92 fps= 18 q=2.0 size=     163kB time=00:00:04.57 bitrate= 291.8kbits/sframe=  103 fps= 18 q=2.0 size=     234kB time=00:00:04.57 bitrate= 418.5kbits/sframe=  114 fps= 19 q=2.0 size=     235kB time=00:00:04.57 bitrate= 421.3kbits/s[alsa @ 0x18e3330] ALSA buffer xrun.
  
  frame=  124 fps= 19 q=2.0 size=     238kB time=00:00:06.66 bitrate= 292.8kbits/sframe=  135 fps= 19 q=2.0 size=     240kB time=00:00:06.66 bitrate= 294.7kbits/sframe=  146 fps= 19 q=2.0 size=     241kB time=00:00:06.66 bitrate= 296.6kbits/sav_interleaved_write_frame(): Broken pipe
  
  [flv @ 0x18f9ea0] Failed to update header with correct duration.
  
  [flv @ 0x18f9ea0] Failed to update header with correct filesize.
  
  Error writing trailer of rtmp://aptus2-aptus.channel.mediaservices.windows.net:1935/live/b962f6df8d3b4e97a608981d019faaa4/default: Broken pipe
  
  frame=  151 fps= 15 q=1.6 Lsize=     306kB time=00:00:06.70 bitrate= 373.5kbits/s speed=0.644x    
  
  video:284kB audio:24kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  [aac @ 0x18fe6e0] Qavg: 3428.370
  
  Conversion failed!

  what am I doing wrong ? Any help would be awesome !

• encoding with ffmpeg libx265 -pix_fmt gray gives unplayable vid

  9 juin 2017, par netjiro

  What am I missing ?
  I encode an old black and white film clip with ffmpeg libx265 passing -pix_fmt gray. The output is unplayable in both vlc and mplayer (linux), so I assume I’m missing something...

  encoding :

  ffmpeg -i clip.mkv \
  
      -c:v libx265 -preset slow -x265-params "crf=24" -pix_fmt gray \
  
      -c:a libopus -b:a 64k \
  
      -c:s copy \
  
      out.mkv

  vlc errors :

  [00007f8a3ddfe328] blend blend error: no matching alpha blending routine (chroma: RGBA -> GREY)
  
  [00007f8a3ddfe328] core blend error: blending RGBA to GREY failed
  
  ... repeated ...

  mplayer errors :

  Unexpected decoder output format Planar Y800
  
  ... repeated ...

  ffmpeg encoding output :

  ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 4.9.4 (Gentoo 4.9.4 p1.0, pie-0.6.4)
  
    configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --docdir=/usr/share/doc/ffmpeg-3.2.4/html --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-march=native -O2 -pipe' --disable-static --enable-avfilter --enable-avresample --disable-stripping --enable-nonfree --enable-version3 --disable-indev=oss --disable-indev=jack --disable-outdev=oss --enable-version3 --enable-bzlib --disable-runtime-cpudetect --disable-debug --disable-gcrypt --disable-gnutls --disable-gmp --enable-gpl --enable-hardcoded-tables --enable-iconv --enable-lzma --enable-network --enable-openssl --enable-postproc --disable-libsmbclient --enable-ffplay --enable-sdl2 --enable-vaapi --enable-vdpau --enable-xlib --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-zlib --enable-libcdio --disable-libiec61883 --disable-libdc1394 --disable-libcaca --enable-openal --enable-opengl --enable-libv4l2 --disable-libpulse --enable-libopencore-amrwb --enable-libopencore-amrnb --disable-libfdk-aac --enable-libopenjpeg --enable-libbluray --enable-libcelt --disable-libgme --disable-libgsm --disable-mmal --enable-libmodplug --enable-libopus --disable-libilbc --disable-librtmp --enable-libssh --enable-libschroedinger --enable-libspeex --enable-libvorbis --enable-libvpx --disable-libzvbi --disable-libbs2b --disable-chromaprint --disable-libebur128 --disable-libflite --disable-frei0r --disable-libfribidi --enable-fontconfig --disable-ladspa --disable-libass --enable-libfreetype --disable-librubberband --disable-libzimg --enable-libsoxr --enable-pthreads --enable-libvo-amrwbenc --enable-libmp3lame --disable-libkvazaar --disable-nvenc --disable-libopenh264 --enable-libsnappy --enable-libtheora --enable-libtwolame --enable-libwavpack --disable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --disable-amd3dnow --disable-amd3dnowext --disable-fma4 --disable-xop --cpu=host --disable-doc --disable-htmlpages --enable-manpages
  
    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
  
  x265 [info]: HEVC encoder version 2.2
  
  x265 [info]: build info [Linux][GCC 4.9.4][64 bit] 8bit+10bit+12bit
  
  x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
  
  x265 [info]: Unknown profile, Level-3.1 (Main tier)
  
  x265 [warning]: No thread pool allocated, --wpp disabled
  
  x265 [warning]: No thread pool allocated, --lookahead-slices disabled
  
  x265 [info]: Slices                              : 1
  
  x265 [info]: frame threads / pool features       : 3 / none
  
  x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
  
  x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
  
  x265 [info]: ME / range / subpel / merge         : star / 57 / 3 / 3
  
  x265 [info]: Keyframe min / max / scenecut / bias: 23 / 250 / 40 / 5.00
  
  x265 [info]: Lookahead / bframes / badapt        : 25 / 4 / 2
  
  x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
  
  x265 [info]: References / ref-limit  cu / depth  : 4 / on / on
  
  x265 [info]: AQ: mode / str / qg-size / cu-tree  : 1 / 1.0 / 32 / 1
  
  x265 [info]: Rate Control / qCompress            : CRF-24.0 / 0.60
  
  x265 [info]: tools: rect limit-modes rd=4 psy-rd=2.00 rdoq=2 psy-rdoq=1.00
  
  x265 [info]: tools: rskip signhide tmvp strong-intra-smoothing deblock sao
  
  Output #0, matroska, to 'out.mkv':
  
    Metadata:
  
      encoder         : Lavf57.56.101
  
      Metadata:
  
      Stream #0:0(eng): Video: hevc (libx265), gray, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 23.98 fps, 1k tbn, 23.98 tbc (default)
  
      Metadata:
  
        encoder         : Lavc57.64.101 libx265
  
      Stream #0:1(eng): Audio: opus (libopus) ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, stereo, flt, 64 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc57.64.101 libopus
  
      Stream #0:2(eng): Subtitle: subrip (default)
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
  
    Stream #0:1 -> #0:1 (eac3 (native) -> opus (libopus))
  
    Stream #0:3 -> #0:2 (copy)
  
  Press [q] to stop, [?] for help
  
  frame= 1439 fps=7.0 q=-0.0 Lsize=    5356kB time=00:01:00.01 bitrate= 731.1kbits/s speed=0.294x    
  
  video:4940kB audio:382kB subtitle:1kB other streams:0kB global headers:2kB muxing overhead: 0.629434%
  
  x265 [info]: frame I:      9, Avg QP:22.27  kb/s: 6064.82 
  
  x265 [info]: frame P:    340, Avg QP:23.62  kb/s: 1950.21 
  
  x265 [info]: frame B:   1090, Avg QP:29.65  kb/s: 230.75  
  
  x265 [info]: Weighted P-Frames: Y:0.9% UV:0.0%
  
  x265 [info]: consecutive B-frames: 2.9% 0.3% 1.4% 72.5% 22.9% 

• Seeking with the activeX VLC plugin has a bad response rate

  24 juin 2017, par Vitalis Hommel

  I am using axVLCPlugin.input.time = pos; where pos is the new time to browse through a video clip in small resolution (240p) in a VLC activeX part of my program using a slider, which updates pos.

  On an older laptop this worked flawlessly, with no delay. On my new laptop, this works only with significant delay, meaning that once I enter a new position, it takes about 1 second to show this position of the video on screen in the VLC activeX plugin. Previously it was instant.

  Is this

  1. a VLC issue(2.2.6 umbrella) ?
  2. a Visual Studio issue(VS 2017) ?
  3. a video encoding issue(ffmpeg version N-86482-gbc40674 - ffmpeg -i inputfile.extension output.mp4) ?
  4. a video codec issue ?

  EDIT : fortunately I found that the activex-plugin has an output. This is what it gives me : https://pastebin.com/GEKb22Gg - still unclear what that means

  How to track down the cause and solve it ?