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• ffmpeg slideshow not working

  4 février 2013, par Benjen

  I am trying to create a simple slideshow video based on two images ('ocean001.jpg' and 'ocean002.jpg'). I am using the command as listed in the ffmpeg documentation, but i always end up with a blank (e.g. black) video file 15 seconds in duration.

  I have checked to confirm that the two image files are the same size. Both are 1024x768px.There are also no errors reported.

  Can anyone tell me what I am doing wrong ?

  Here is the output of the command I am using :

  ffmpeg -f image2 -r 1/15 -i ocean%03d.jpg -vcodec libx264 out.mp4

  Below is the output of the above command :

  ffmpeg version 1.0 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Sep 29 2012 11:22:50 with gcc 4.7.1 (GCC) 20120721 (prerelease)
  
    configuration: --prefix=/usr --enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264 --enable-libvpx --enable-libtheora --enable-libgsm --enable-libspeex --enable-postproc --enable-shared --enable-x11grab --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libschroedinger --enable-libopenjpeg --enable-librtmp --enable-libpulse --enable-libv4l2 --enable-gpl --enable-version3 --enable-runtime-cpudetect --disable-debug --disable-static
  
    libavutil      51. 73.101 / 51. 73.101
  
    libavcodec     54. 59.100 / 54. 59.100
  
    libavformat    54. 29.104 / 54. 29.104
  
    libavdevice    54.  2.101 / 54.  2.101
  
    libavfilter     3. 17.100 /  3. 17.100
  
    libswscale      2.  1.101 /  2.  1.101
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, image2, from 'ocean%03d.jpg':
  
    Duration: 00:00:30.00, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj444p, 1024x768 [SAR 72:72 DAR 4:3], 1 tbr, 0.07 tbn, 0.07 tbc
  
  [libx264 @ 0x22debc0] using SAR=1/1
  
  [libx264 @ 0x22debc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle Cache64
  
  [libx264 @ 0x22debc0] profile High, level 3.1
  
  [libx264 @ 0x22debc0] 264 - core 124 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=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=1 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 'out.mp4':
  
    Metadata:
  
      encoder         : Lavf54.29.104
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuvj420p, 1024x768 [SAR 1:1 DAR 4:3], q=-1--1, 1 tbn, 0.07 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg -> libx264)
  
  Press [q] to stop, [?] for help
  
  frame=    2 fps=0.0 q=17.0 Lsize=     215kB time=00:00:30.00 bitrate=  58.7kbits/s    
  
  video:214kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.363298%
  
  [libx264 @ 0x22debc0] frame I:1     Avg QP:16.68  size:132919
  
  [libx264 @ 0x22debc0] frame P:1     Avg QP:14.27  size: 85767
  
  [libx264 @ 0x22debc0] mb I  I16..4:  0.0% 100.0%  0.0%
  
  [libx264 @ 0x22debc0] mb P  I16..4:  8.1% 82.9%  9.0%  P16..4:  0.0%  0.0%  0.0%  0.0%  0.0%    skip: 0.0%
  
  [libx264 @ 0x22debc0] 8x8 transform intra:91.5% inter:100.0%
  
  [libx264 @ 0x22debc0] coded y,uvDC,uvAC intra: 97.6% 96.7% 80.8% inter: 100.0% 100.0% 100.0%
  
  [libx264 @ 0x22debc0] i16 v,h,dc,p:  1%  3%  1% 96%
  
  [libx264 @ 0x22debc0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 18% 28%  7%  5%  5%  7%  7% 11%
  
  [libx264 @ 0x22debc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 16% 12%  8% 10%  8%  6%  8%  5%
  
  [libx264 @ 0x22debc0] i8c dc,h,v,p: 39% 25% 16% 20%
  
  [libx264 @ 0x22debc0] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x22debc0] kb/s:58.32

• Setting duration is not working in ffmpeg

  7 mai 2014, par Stepan

  Have problem with creating video from 50 png files in ffmpeg in shell.
  Setting duration -t 5 and fps -r 10

  ffmpeg -i image%d.png -y -pix_fmt yuv444p -r 10 -t 5 -s 1920:1080 out.mp4

  Final duration is 2 seconds and fps is 25.

  How to set it correctly ?

  I’m running at elementaryOS, ffmpeg version 0.8.10-4

  Thanks

• lavf/concatdec : use a structure for each stream.

  14 avril 2014, par Nicolas George

  lavf/concatdec : use a structure for each stream.
  

  • [DH] libavformat/concatdec.c