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• How to successfully use ffmpeg to convert images into videos

  6 février 2014, par user3276588

  Currently I'm trying to make 5 second videos for each image and then combining them using concat, but I'm having a lot of issues doing this.

  Here is my code :

  ffmpeg -loop 1 -i 000.jpg -t 5 000.mp4
  ffmpeg -loop 1 -i 001.jpg -t 5 001.mp4
  ffmpeg -f concat -i inputs.txt -codec copy output.mp4

  inputs.txt lists the following
  file '000.mp4'
  file '001.mp4'

  Now when I try all of this, I run the output mp4 file and the first part of it works fine, but then once it starts displaying the 001 part of the video, it switches to a gray screen. It doesn't even do that in the stand-alone file 001.mp4.

  Any suggestions on what's going on or what I could do fix this ?

  I've tried so many other things too. Like switching all the files over to png instead, which gave the same issue. I also tried using different output file types like wmv, avi, etc. I'm still very new though so I don't know what else to try.

  This is what shows up in my command prompt after running the command.

  C:\xampp\htdocs\images>ffmpeg -f concat -i inputs.txt -codec copy output.mp4
  
  ffmpeg version N-50911-g9efcfbe Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Mar 13 2013 21:26:48 with gcc 4.7.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libg
  
  sm --enable-libilbc --enable-libmp3lame --enable-libopencore-amrnb --enable-libo
  
  pencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-li
  
  bschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-lib
  
  twolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enabl
  
  e-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 19.100 / 52. 19.100
  
    libavcodec     55.  0.100 / 55.  0.100
  
    libavformat    55.  0.100 / 55.  0.100
  
    libavdevice    54.  4.100 / 54.  4.100
  
    libavfilter     3. 45.103 /  3. 45.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  [concat @ 003b9660] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, concat, from 'inputs.txt':
  
    Duration: 00:00:00.01, start: 0.000000, bitrate: 28 kb/s
  
      Stream #0:0: Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444
  
  p, 800x600 [SAR 1:1 DAR 4:3], 28 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf55.0.100
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv444p, 800x600 [SAR 1:1
  
   DAR 4:3], q=2-31, 28 kb/s, 25 fps, 12800 tbn, 12800 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=  250 fps=0.0 q=-1.0 Lsize=      31kB time=00:00:09.88 bitrate=  26.1kbits
  
  /s
  
  video:28kB audio:0kB subtitle:0 global headers:0kB muxing overhead 13.534948%
  
  
  
  C:\xampp\htdocs\images>

• Evolution #3791 (Fermé) : Driver generic acces base de données

  11 février 2021, par cedric -

  Le sujet est resté en stand-by. Proposer une PR sur https://git.spip.net/spip/spip si c’est mur, pour le relancer
  en attendant je ferme ici

• Is it possible to create new mp4 file from a single streaming byte range chunk ?

  22 avril 2014, par bevinlorenzo

  If I have a remote mp4 file on a server that supports Byte Ranges, is it possible to retrieve a single byte range and create a new/self-contained mp4 from that range data ?

  If I try and write a returned byte range data directly to an mp4 file using fs.createWriteStream(remoteFilename) it doesn’t get the video meta data (duration, dimensions, etc) that it needs to be playable.

  When I get a byte range that starts with 0 and ends with XX the output mp4 is playable, but will have the duration meta-data of the entire video length and will freeze the screen when the byte range is done for the remainder of the duration time.

  How else can I take a byte range and create a stand-alone .mp4 file from that stream object ?

  The whole point of this is to avoid downloading the entire 10 minute file before I can make a 5 second clip using ffmpeg. If I can calculate and download the byte range, there should be a way to write it to a standalone mp4 file.

  Thanks in advance for any help you can provide.