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• ffmpeg not giving correct duration of a mp4

  1er juin 2012, par oach

  I am working with ffmpeg to convert videos into flv files via php. The tests I have done do not work for mp4 conversions. I have a 13 second video (videos will be limited to 15 seconds), when it is uploaded and I check the "duration" of the video it comes out over 300 seconds. I have tried changing around how I process the video :

  // original
  
  exec(&#39;ffmpeg -i <path>/<filename> 2>&amp;1&#39;, $output);
  
  
  
  // current
  
  exec(&#39;ffmpeg -i <path>/<filename> 2>&amp;1 | grep "Duration" | cut -d \&#39; \&#39; -f 4 | sed s/,//&#39;, $output);
  
  </filename></path></filename></path>

  The original method did not work for mpg files but the second does, but neither gives me the "correct" duration of a mp4 video. Is there a "special" way to process mp4 files ?

  Thank you for your time and help.

  Update :

  Command line

  ffmpeg -i ./custom_scraping.mp4 2>&1 | grep "Duration" | cut -d ' ' -f 4 | sed s/,//
  
  00:05:15.84

  Complete output (formatted as best I could)

  ffmpeg -i ./custom_scraping.mp4 2>&1
  
  FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers
  
  built on Jan 29 2012 23:55:02 with gcc 4.1.2 20080704 (Red Hat 4.1.2-51)
  
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --enable-avfilter --enable-avfilter-lavf --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab
  
  libavutil     50.15. 1 / 50.15. 1
  
  libavcodec    52.72. 2 / 52.72. 2
  
  libavformat   52.64. 2 / 52.64. 2
  
  libavdevice   52. 2. 0 / 52. 2. 0
  
  libavfilter    1.19. 0 /  1.19. 0
  
  libswscale     0.11. 0 /  0.11. 0
  
  libpostproc   51. 2. 0 / 51. 2. 0
  
  
  
  Seems stream 1 codec frame rate differs from container frame rate: 5994.00 (5994/1) -> 29.97 (2997/100)
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './custom_scraping.mp4':
  
  Metadata:
  
  major_brand     : mp42
  
  minor_version   : 1
  
  compatible_brands: mp42avc1
  
  Duration: 00:05:15.84, start: 0.000000, bitrate: 36 kb/s
  
  Stream #0.0(eng): Audio: aac, 44100 Hz, stereo, s16, 2 kb/s
  
  Stream #0.1(eng): Video: h264, yuv420p, 480x360, 36 kb/s, 1.04 fps, 29.97 tbr, 2997 tbn, 5994 tbc

  At least one output file must be specified

  Don't know if it helps but from the listing of the file in Linux :
  1432471 May 31 13:33 custom_scraping.mp4

  Let me know if anything else is needed.

• ffmpeg & png watermark issue

  2 décembre 2013, par mindcast

  I tried to create a watermark (using a png image) on a video like this :

  ffmpeg -i test.wmv -b:a 300k -ar 22050 -t 10 -f flv -s 352x288 -vf "movie = watermark_logo352.png [watermark]; [in][watermark] overlay =0:0 [out]" out.flv

  but I get the error :

  ffmpeg version 0.10.4 Copyright (c) 2000-2012 the FFmpeg developers
  
  built on Jun 14 2012 13:14:31 with gcc 4.4.5   configuration:
  
  --prefix=/home/username --enable-cross-compile --enable-shared --arch=amd64 --target-os=linux --disable-yasm --enable-decoder=png --enable-encoder=png   
  
          libavutil      51. 35.100 / 51. 35.100   
  
          libavcodec     53. 61.100 / 53. 61.100   
  
          libavformat    53. 32.100 / 53. 32.100   
  
          libavdevice    53.  4.100 / 53.  4.100   
  
          libavfilter     2. 61.100 /  2. 61.100   
  
          libswscale      2.  1.100 /  2.  1.100   
  
          libswresample   0.  6.100 /  0.  6.100 
  
          Input #0, asf, from 'test.wmv':   
  
          Metadata:
  
              >     WMFSDKVersion   : 9.00.00.2980
  
              >     WMFSDKNeeded    : 0.0.0.0000
  
              >     IsVBR           : 1
  
              >     VBR Peak        : 351
  
              >     Buffer Average  : 728   Duration: 00:00:05.59, start: 0.000000, bitrate: 574 kb/s
  
              >     Stream #0:0(jpn): Audio: wmav2 (a[1][0][0] / 0x0161), 22050 Hz, 2 channels, s16, 32 kb/s
  
              >     Stream #0:1(jpn): Video: wmv1 (WMV1 / 0x31564D57), yuv420p, 352x288, 520 kb/s, SAR 8:9 DAR 88:81, 29.97 tbr, 1k tbn, 1k tbc File
  
              > 'out2.flv' already exists. Overwrite ? [y/N] y w:352 h:288
  
              > pixfmt:yuv420p tb:1/1000000 sar:8/9 sws_param: 
  
      [image2 @ 0x551f880] decoding for stream 0 failed 
  
      [image2 @ 0x551f880] Could not find codec parameters (Video: png) 
  
      [movie @ 0x551f440] Failed to find stream info
  
      [movie @ 0x551f440] Failed to find any codec 
  
      Error initializing filter 'movie' with args 'watermark_logo352.png' 
  
      Error opening filters!

  When I use a jpg, it works like a charm.

  I'm use ffmpeg v 0.10.4 on Debian 6 Squeeze.
  Any help would be much appreciated.

  EDIT

  The problem is simpler than i thought. If i use ffmpeg -i with any png image i get a similar error :

    libavutil      51. 35.100 / 51. 35.100
  
    libavcodec     53. 61.100 / 53. 61.100
  
    libavformat    53. 32.100 / 53. 32.100
  
    libavdevice    53.  4.100 / 53.  4.100
  
    libavfilter     2. 61.100 /  2. 61.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0.  6.100 /  0.  6.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  [image2 @ 0xc8b73a0] decoding for stream 0 failed
  
  [image2 @ 0xc8b73a0] Could not find codec parameters (Video: png)
  
  watermark.png: could not find codec parameters

• ffmpeg : drop the -vc option

  12 novembre 2021, par Anton Khirnov

  ffmpeg : drop the -vc option
  It is undocumented and has been deprecated since 2012.
  

  • [DH] fftools/ffmpeg_opt.c