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• downsizing multiple mpg files using ffmpeg.exe

  14 septembre 2022, par user2799077

  I'm using ffmpeg.exe to process screen captures for a demo using MS Game Bar. Game Bar captures at a high frame rate at high resolution and the files are very large.

  


  Using ffmpeg.exe I can process the files using :

  


  ffmpeg.exe -i file.mpg file_l.mpg

  


  And all is good but I'd like to create a bat file so I can do half a dozen or any in a folder all at once.

  


  My Windows bat skills are poor and I've been trying to get it to work using something like this without success :

  


  for %%f in (*.mp4) do (
  ren %%~nf%%~xf !fileNum!%%~xf
  set/a fileNum += 1


  


  Can anyone help please

  


• FFMPEG failing to convert to ogv [closed]

  25 juillet 2012, par Todd R

  I have several videos I'm trying to convert to mp4, swf and ogv. I've got the mp4 and swf's working, but ogv is failing and I'm not sure why. I understand all the arguments you can pass to ffmpeg, but feel like getting the correct ones is a huge guessing game. Any suggestions on what I can change to get this to work would be much appreciated.

  Here's the command I'm using :

  ffmpeg -i /private/var/tmp/phpU5KPR7 -y -s 330X240 -acodec libvorbis -vcodec libtheora outputpath/Videos/1.ogv 2>&1

  And here are the results :

  2012-07-24T19:05:11-07:00 INFO (6): Creating ogv for 1 returned 1:
  
  2012-07-24T19:05:11-07:00 INFO (6): Array
  
  (
  
      [0] => ffmpeg version 0.8.6, Copyright (c) 2000-2011 the FFmpeg developers
  
      [1] =>   built on Nov 16 2011 19:56:59 with gcc 4.2.1 (Apple Inc. build 5666) (dot 3)
  
      [2] =>   configuration: --enable-libmp3lame --enable-libfaac --enable-libtheora --enable-libvorbis --enable-nonfree --disable-yasm
  
      [3] =>   libavutil    51.  9. 1 / 51.  9. 1
  
      [4] =>   libavcodec   53.  7. 0 / 53.  7. 0
  
      [5] =>   libavformat  53.  4. 0 / 53.  4. 0
  
      [6] =>   libavdevice  53.  1. 1 / 53.  1. 1
  
      [7] =>   libavfilter   2. 23. 0 /  2. 23. 0
  
      [8] =>   libswscale    2.  0. 0 /  2.  0. 0
  
      [9] => Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/private/var/tmp/phpU5KPR7':
  
      [10] =>   Metadata:
  
      [11] =>     major_brand     : 3gp4
  
      [12] =>     minor_version   : 768
  
      [13] =>     compatible_brands: 3gp43gp6
  
      [14] =>   Duration: 00:00:03.17, start: 0.000000, bitrate: 433 kb/s
  
      [15] =>     Stream #0.0(eng): Audio: amrnb, 8000 Hz, 1 channels, flt, 12 kb/s
  
      [16] =>     Stream #0.1(eng): Video: mpeg4, yuv420p, 352x288 [PAR 1:1 DAR 11:9], 411 kb/s, 13.87 fps, 15 tbr, 15k tbn, 15 tbc
  
      [17] => WARNING: The bitrate parameter is set too low. It takes bits/s as argument, not kbits/s
  
      [18] => Incompatible sample format 'flt' for codec 'libfaac', auto-selecting format 's16'
  
      [19] => [buffer @ 0x101001480] w:352 h:288 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:
  
      [20] => [scale @ 0x101002560] w:352 h:288 fmt:yuv420p -> w:330 h:240 fmt:yuv420p flags:0x4
  
      [21] => Output #0, mp4, to 'outputpath/Videos/1.mp4':
  
      [22] =>   Metadata:
  
      [23] =>     major_brand     : 3gp4
  
      [24] =>     minor_version   : 768
  
      [25] =>     compatible_brands: 3gp43gp6
  
      [26] =>     encoder         : Lavf53.4.0
  
      [27] =>     Stream #0.0(eng): Video: mpeg4, yuv420p, 330x240 [PAR 8:9 DAR 11:9], q=2-31, 300 kb/s, 20 tbn, 20 tbc
  
      [28] =>     Stream #0.1(eng): Audio: libfaac, 44100 Hz, 1 channels, s16, 0 kb/s
  
      [29] => Stream mapping:
  
      [30] =>   Stream #0.1 -> #0.0
  
      [31] =>   Stream #0.0 -> #0.1
  
      [32] => Press [q] to stop, [?] for help
  
      [33] => Warning, using s16 intermediate sample format for resampling
  
      [34] => frame=   62 fps=  0 q=6.4 Lsize=     253kB time=00:00:03.08 bitrate= 670.6kbits/s dup=18 drop=0
  
      [35] => video:238kB audio:12kB global headers:0kB muxing overhead 1.096923%
  
      [36] => ffmpeg version 0.8.6, Copyright (c) 2000-2011 the FFmpeg developers
  
      [37] =>   built on Nov 16 2011 19:56:59 with gcc 4.2.1 (Apple Inc. build 5666) (dot 3)
  
      [38] =>   configuration: --enable-libmp3lame --enable-libfaac --enable-libtheora --enable-libvorbis --enable-nonfree --disable-yasm
  
      [39] =>   libavutil    51.  9. 1 / 51.  9. 1
  
      [40] =>   libavcodec   53.  7. 0 / 53.  7. 0
  
      [41] =>   libavformat  53.  4. 0 / 53.  4. 0
  
      [42] =>   libavdevice  53.  1. 1 / 53.  1. 1
  
      [43] =>   libavfilter   2. 23. 0 /  2. 23. 0
  
      [44] =>   libswscale    2.  0. 0 /  2.  0. 0
  
      [45] => Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/private/var/tmp/phpU5KPR7':
  
      [46] =>   Metadata:
  
      [47] =>     major_brand     : 3gp4
  
      [48] =>     minor_version   : 768
  
      [49] =>     compatible_brands: 3gp43gp6
  
      [50] =>   Duration: 00:00:03.17, start: 0.000000, bitrate: 433 kb/s
  
      [51] =>     Stream #0.0(eng): Audio: amrnb, 8000 Hz, 1 channels, flt, 12 kb/s
  
      [52] =>     Stream #0.1(eng): Video: mpeg4, yuv420p, 352x288 [PAR 1:1 DAR 11:9], 411 kb/s, 13.87 fps, 15 tbr, 15k tbn, 15 tbc
  
      [53] => Incompatible sample format 'flt' for codec 'libvorbis', auto-selecting format 's16'
  
      [54] => [buffer @ 0x1010021a0] w:352 h:288 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:
  
      [55] => [scale @ 0x101002520] w:352 h:288 fmt:yuv420p -> w:330 h:240 fmt:yuv420p flags:0x4
  
      [56] => [libvorbis @ 0x101801e00] oggvorbis_encode_init: init_encoder failed
  
      [57] => Output #0, ogg, to 'outputpath/Videos/1.ogv':
  
      [58] =>     Stream #0.0(eng): Video: libtheora, yuv420p, 330x240 [PAR 8:9 DAR 11:9], q=2-31, 200 kb/s, 90k tbn, 15 tbc
  
      [59] =>     Stream #0.1(eng): Audio: libvorbis, 8000 Hz, 1 channels, s16, 64 kb/s
  
      [60] => Stream mapping:
  
      [61] =>   Stream #0.1 -> #0.0
  
      [62] =>   Stream #0.0 -> #0.1
  
      [63] => Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  )

• Stream a website to a mp4 (rendering html to a mp4)

  25 septembre 2022, par Muppet1856

  I am trying to composite a website (which contains JavaScript and as a result is updating regularly) with a video feed. My goal is to do it on virtual hosted Linux server (my plan is to use Ubuntu, but I am flexible) - I am not interested in solutions utilizing OBS or the like as my solution would be headless.

  


  The problem I am facing is how to output the website to a video stream from a command line.

  


  The site I want to capture is https://vscore.ch/home and I would like to render it in a way that I can feed it to ffmpeg where I can composite it with the live game video that is being delivered via RTMP.