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• Scroll one image top to bottom

  17 septembre 2018, par Cyber

  I am trying to scroll an image top to bottom like this video :
  https://youtu.be/8GCrrsiBLzs

  And here’s what I tried

  ffmpeg -loop 1 -t 24 -i "image.jpg" -filter_complex "color=000000:s=640x360[bg]; [bg][0]overlay=shortest=1:y='min(0,-(t)*26)'" -y out6.mp4

  But video didn’t created, ffmpeg close immediately and returns following results :

  ffmpeg version N-91960-g63c69d51c7 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 8.2.1 (GCC) 20180813
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  
    libavutil      56. 19.101 / 56. 19.101
  
    libavcodec     58. 30.100 / 58. 30.100
  
    libavformat    58. 18.101 / 58. 18.101
  
    libavdevice    58.  4.103 / 58.  4.103
  
    libavfilter     7. 31.100 /  7. 31.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
    libpostproc    55.  2.100 / 55.  2.100
  
  Input #0, image2, from 'image.jpg':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: 134122 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1280x1920 [SAR 96:96 DAR 2:3], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 (mjpeg) -> overlay:overlay
  
    overlay -> Stream #0:0 (libx264)
  
  Press [q] to stop, [?] for help
  
  [swscaler @ 000001a855f90100] deprecated pixel format used, make sure you did set range correctly
  
  [libx264 @ 000001a856483200] using SAR=1/1
  
  [libx264 @ 000001a856483200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 000001a856483200] profile High, level 3.0, 4:2:0, 8-bit
  
  [libx264 @ 000001a856483200] 264 - core 157 r2932 303c484 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=11 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'out6.mp4':
  
    Metadata:
  
      encoder         : Lavf58.18.101
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc58.30.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1

• FFMPEG libfdk_aac codec with VBR option not supported

  25 septembre 2018, par Piri

  I’m trying to makes an app that uses terminal ffmpeg with libfdk_aac codec.
  The problem is when I use -VBR mode, the result Bit rate mode is always Constant(CBR).

  I’ve searched about this problem and I’ve found the following article :

  https://lists.ffmpeg.org/pipermail/ffmpeg-user/2013-February/013652.html
  this article is from 2013 and seems is still valid !

  Also i am not the only one with this problem
  https://superuser.com/questions/1326239/encoding-aac-from-wav?rq=1

  My terminal string is :

  ffmpeg -i input* -c:a libfdk_aac -vbr 4 output**

  1. *- input formats can be : FLAC, WEBM, MP4
  2. **- output formats can be : M4A, AAC

  Question is : Can this be solved with the current version of ffmpeg :
  ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3) ??
  if not, is using directly fdkaac from terminal the only option ?

  Any Help is much appreciated.

• Streaming by ffserver and ffmpeg on RaspberryPi

  15 septembre 2018, par saitoib

  I want to ditribute the video of the UVC Camera on Rpsberry Pi
  I edited /etc/ffserver.conf as follows.

  HTTPPort 8090
  
  HTTPBindAddress 0.0.0.0
  
  MaxHTTPConnections 20
  
  MaxClients 10
  
  MaxBandwidth 500000
  
  CustomLog -
  
  
  
  <feed>
  
  File /tmp/feed1.ffm
  
  FileMaxSize 50M
  
  </feed>
  
  
  
  <stream>
  
  Format status
  
  ACL allow 192.168.12.0 192.168.12.255
  
  </stream>
  
  
  
  <stream>
  
  Feed feed1.ffm
  
  Format mpeg
  
  VideoSize hd720
  
  VideoFrameRate 15
  
  VideoBitRate 4096
  
  VideoBufferSize 4096
  
  VideoQMin 5
  
  VideoQMax 51
  
  Strict -1
  
  </stream>

  Then, I started ffserver
  Next, I executed the following command

  ffmpeg -f v4l2 -s 1280x720 -i /dev/video0 -ac 1 -f alsa -i hw:1,0 http://localhost:8090/feed1.ffm

  I requested 192.168.12.101 : 8090 / test.mpeg from FireFox on the same network,
  but no video is displayed and a program to open or a file save dialog opens.

  What should I do ?

  Execution result of Raspberry Pi

  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 519134.790720, bitrate: 147456 kb/s
  
      Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1280x720, 147456 kb/s, 10 fps, 10 tbr, 1000k tbn, 1000k tbc
  
  Guessed Channel Layout for Input Stream #1.0 : mono
  
  Input #1, alsa, from 'hw:1,0':
  
    Duration: N/A, start: 1536994777.250578, bitrate: 768 kb/s
  
      Stream #1:0: Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb/s
  
  [tcp @ 0x23ec7f0] Connection to tcp://localhost:8090 failed (Connection refused), trying next address
  
  Sat Sep 15 15:59:37 2018 [ffm @ 0xf10e40]Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Sat Sep 15 15:59:37 2018 [ffm @ 0xf10e40]Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Sat Sep 15 15:59:37 2018 127.0.0.1 - - [GET] "/feed1.ffm HTTP/1.1" 200 4175
  
  [tcp @ 0x2401d50] Connection to tcp://localhost:8090 failed (Connection refused), trying next address
  
  Output #0, ffm, to 'http://localhost:8090/feed1.ffm':
  
    Metadata:
  
      creation_time   : now
  
      encoder         : Lavf57.56.101
  
      Stream #0:0: Audio: mp2, 22050 Hz, mono, s16, 64 kb/s
  
      Metadata:
  
        encoder         : Lavc57.64.101 mp2
  
      Stream #0:1: Video: mpeg1video, yuv420p, 1280x720, q=5-51, 4096 kb/s, 10 fps, 1000k tbn, 15 tbc
  
      Metadata:
  
        encoder         : Lavc57.64.101 mpeg1video
  
      Side data:
  
        cpb: bitrate max/min/avg: 8192000/0/4096000 buffer size: 33554432 vbv_delay: -1
  
  Stream mapping:
  
    Stream #1:0 -> #0:0 (pcm_s16le (native) -> mp2 (native))
  
    Stream #0:0 -> #0:1 (rawvideo (native) -> mpeg1video (native))
  
  Press [q] to stop, [?] for help
  
  [alsa @ 0x23ebee0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  
  [alsa @ 0x23ebee0] ALSA buffer xrun. 48kB time=00:00:00.13 bitrate=2949.1kbits/s dup=3 drop=0 speed=0.251x
  
  [video4linux2,v4l2 @ 0x23ea230] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  
  [alsa @ 0x23ebee0] ALSA buffer xrun.276kB time=00:00:02.40 bitrate= 942.1kbits/s dup=30 drop=0 speed=0.201x
  
  Sat Sep 15 15:59:55 2018 [mpeg @ 0xf136d0]VBV buffer size not set, using default size of 130KB speed=0.844x
  
  If you want the mpeg file to be compliant to some specification
  
  Like DVD, VCD or others, make sure you set the correct buffer size
  
  frame=  107 fps=3.1 q=2.0 Lsize=     856kB time=00:00:14.06 bitrate= 498.6kbits/s dup=80 drop=0 speed=0.413x
  
  video:844kB audio:2kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.120285%
  
  Sat Sep 15 16:00:11 2018 127.0.0.1 - - [POST] "/feed1.ffm HTTP/1.1" 200 876544
  
  Sat Sep 15 16:00:11 2018 [mpeg @ 0xf136d0]buffer underflow st=0 bufi=0 size=418
  
  Sat Sep 15 16:00:11 2018 192.168.12.150 - - [GET] "/test.mpeg HTTP/1.1" 200 29263
  
  Exiting normally, received signal 2.

  Result of 192.168.12.101:8090

  ffserver Status
  
  Available Streams
  
  Path    Served
  
  Conns   
  
  bytes   Format  Bit rate
  
  kbit/s  Video
  
  kbit/s  
  
  Codec   Audio
  
  kbit/s  
  
  Codec   Feed
  
  index.html  1   0   -   -   -       -   
  
  test.mpeg   0   0   mpeg    4160    4096    mpeg1video  64  mp2     feed1.ffm
  
  Feed feed1.ffm
  
  Stream  type    kbit/s  codec   Parameters
  
  0   audio   64  mp2 1 channel(s), 22050 Hz
  
  1   video   4096    mpeg1video  1280x720, q=5-51, fps=15
  
  Connection Status
  
  Number of connections: 1 / 10
  
  Bandwidth in use: 0k / 10000k
  
  #   File    IP  Proto   State   Target bit/s    Actual bit/s    Bytes transferred
  
  1   index.html  192.168.12.150  HTTP/1.1    HTTP_WAIT_REQUEST   0   0   0