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• Streaming an Updating Folder of Images with FFmpeg Without Restarting the Script

  11 juillet 2024, par Roy Raihenshtein

  I'm working on a project where I need to stream a series of images stored in a folder using FFmpeg.
My current command looks like this :

  


  ffmpeg -stream_loop -1 -f image2 -framerate 5 -i "C:\Images\%d.bmp" -c:v libx264 -preset ultrafast -tune zerolatency -crf 35 -pix_fmt bgra -vf format=bgra -f mpegts "udp://127.0.0.1:8554?pkt_size=1316&buffer_size=64k"


  


  Initially, the folder contains :

  


  Input:
1.bmp
2.bmp
3.bmp
.
.
.
N.bmp


  


  Running this command successfully streams the images. However, new images (e.g., N2.bmp) might be added to the folder during runtime, and I need these new images to be included in the stream without restarting FFmpeg.

  


  Challenges :

  


  

  1. I need to include newly added images in the ongoing stream without rerunning the FFmpeg command.

  


  2. I delete the .bmp files after they are streamed to avoid filling up my hard disk, so rerunning the command is not an option.

  


  


  Additional Context :

  


  The FFmpeg command is embedded within my .NET program, which handles the deletion of images after they are streamed. This ensures that my PC's hard disk does not fill up, but it also means I cannot simply restart the FFmpeg command whenever new images are added.

  


  Question :

  


  Is there a way to configure FFmpeg or use an additional tool to dynamically update the input source to include newly added images without stopping and restarting the FFmpeg command ?

  


  Any guidance or suggestions on how to achieve this would be greatly appreciated. Thank you !

  


• How to convert webp images to MP4 video using ffmpeg

  12 octobre 2016, par Sunny Tambi

  I have tried many possible command line options with ffmpeg, however not getting this to work. I want to convert series of webp images to a mp4 video.
  Some commands that i tried are :

  ffmpeg -i img%04d.webp out.mp4
  
  
  
  ffmpeg -i img%04d.webp -c:v libx264 out.mp4
  
  
  
  ffmpeg -i img%04d.webp -pix_fmt yuv420p out.mp4
  
  
  
  ffmpeg -i img%04d.webp -c:v libx264 -pix_fmt yuv420p -crf 25 out.mp4
  
  
  
  ffmpeg -i img%04d.webp -c:v libx264 -pix_fmt yuv420p -crf 25 -b:v 0 out.mp4

  None of them creates an mp4 video. A mp4 file, though, gets created, however it is of 0 sec. Here is a sample output of one of the execution :

  ffmpeg -i img%04d.webp -c:v libx264 -pix_fmt yuv420p -crf 25 -y out.mp4
  
  
  
  ffmpeg version N-81045-g450cf40 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.4.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  
  libavutil      55. 28.100 / 55. 28.100
  
  libavcodec     57. 50.100 / 57. 50.100
  
  libavformat    57. 42.100 / 57. 42.100
  
  libavdevice    57.  0.102 / 57.  0.102
  
  libavfilter     6. 47.100 /  6. 47.100
  
    libswscale      4.  1.100 /  4.  1.100
  
  libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, image2, from 'img%04d.webp':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
  
  Stream #0:0: Video: webp, yuva420p(tv, bt470bg/unknown/unknown), 320x568, 25 tbr, 25 tbn, 25 tbc
  
  [libx264 @ 00000000006dbbc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 00000000006dbbc0] profile High, level 2.1
  
  [libx264 @ 00000000006dbbc0] 264 - core 148 r2705 3f5ed56 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - 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=6 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=25.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [mp4 @ 00000000006d8700] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Output #0, mp4, to 'out.mp4':
  
  Metadata:
  
  encoder : Lavf57.42.100
  
  Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 320x568, q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
  Metadata:
  
  encoder : Lavc57.50.100 libx264
  
  Side data:
  
  cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (webp (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame= 1 fps=0.0 q=30.0 Lsize= 3kB time=00:00:00.00 bitrate=265435.9kbits/s speed=0.011x video:2kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 44.661823%
  
  [libx264 @ 00000000006dbbc0] frame I:1     Avg QP:23.37  size:  1100
  
  [libx264 @ 00000000006dbbc0] mb I  I16..4: 24.4% 71.5%  4.0%
  
  [libx264 @ 00000000006dbbc0] 8x8 transform intra:71.5%
  
  [libx264 @ 00000000006dbbc0] coded y,uvDC,uvAC intra: 6.1% 5.4% 4.2%
  
  [libx264 @ 00000000006dbbc0] i16 v,h,dc,p: 80% 14%  6%  1%
  
  [libx264 @ 00000000006dbbc0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 46%  5% 48%  0%  0%  0%  0%  0%  0%
  
  [libx264 @ 00000000006dbbc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 20% 42%  2%  2%  2%  2%  2%  3%
  
  [libx264 @ 00000000006dbbc0] i8c dc,h,v,p: 89%  9%  1%  0%
  
  [libx264 @ 00000000006dbbc0] kb/s:220.00

  Excerpt from the above :

  frame=1 
  
  fps=0.0
  
  time=00:00:00.00
  
  video:2kB

  This should give the idea of what I am trying to say.

  Need help if someone can tell how to convert a series of webp images to MP4 video.

• Ffmpeg- Split the video into 30 seconds chunks in android [duplicate]

  23 novembre 2019, par Corgi Mogi

  This question is an exact duplicate of :

  • Ffmpeg- Split video into 30 seconds parts in android

  I am trying to split a video file into 30 second blocks.
  I do not need to specify where the 30 seconds start or finish.
  EXAMPLE- A single 45 second video will be split into VID1_part1 (30 seconds), VID1_part2 (15 seconds).

  Right now I am using the Ffmpeg command where I need to specify the starting and ending point.

  String[] complexCommand = {"-ss", "" + startMs / 1000, "-y", "-i", yourRealPath, "-t", "" + (endMs - startMs) / 1000,"-vcodec", "mpeg4", "-b:v", "2097152", "-b:a", "48000", "-ac", "2", "-ar", "22050", filePath};

  I also tried to add a for loop in order to repeat the process

   int start, end;
  
          for (int i = 0; i <= duration; i = i + 30) {
  
              start = i;
  
              end = start + 30;
  
  
  
              String[] complexCommand = {"-ss", "" + start, "-y", "-i", yourRealPath, "-t", "" + end,"-vcodec", "mpeg4", "-b:v", "2097152", "-b:a", "48000", "-ac", "2", "-ar", "22050", filePath};
  
              execFFmpegBinary(complexCommand);
  
          }

  But didn’t workout

  This works fine.
  But I want the command through I can split a single video into 30 second chunks.
  And should I use a single command for this purpose or a series of commands ?
  Help is much appreciated