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• ffmpeg frame rate issue h264+ass to mkv

  27 juin 2013, par user2529661

  I'm using this command for ffmpeg :

  ffmpeg  -i 1.h264 -i ass1.ass -map 0 -map 1 -c copy test.mkv

  The h264 file is 30 fps... the mkv plays at 25fps so it runs slow

  The h264 come off my hd webcam. If i change the frame rate on the camera to 25 it works fine and 15fps wilk play at high speed. I can force the frame rate ? Every if i need a different command line tool to change it that is acceptable. But if i could fix it form ffmpeg that would be ideal. I'm running the commands from vb.net.

  command output
  
  C:\Record\Normal\2013-06-27>c:\ffmpeg\bin\ffmpeg  -i 1.h264 -i ass1.ass -map 0 -
  
  map 1 -c copy test.mkv
  
  ffmpeg version N-54207-ge59fb3f Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jun 25 2013 21:55:00 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
  
  amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
  
  enable-libxvid --enable-zlib
  
    libavutil      52. 37.101 / 52. 37.101
  
    libavcodec     55. 17.100 / 55. 17.100
  
    libavformat    55. 10.100 / 55. 10.100
  
    libavdevice    55.  2.100 / 55.  2.100
  
    libavfilter     3. 77.101 /  3. 77.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, h264, from '1.h264':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (Baseline), yuv420p, 1920x1088 [SAR 1:1 DAR 30:17],
  
   25 fps, 25 tbr, 1200k tbn, 50 tbc
  
  Input #1, ass, from 'ass1.ass':
  
    Duration: N/A, bitrate: N/A
  
      Stream #1:0: Subtitle: ssa
  
  File 'test.mkv' already exists. Overwrite ? [y/N] y
  
  Output #0, matroska, to 'test.mkv':
  
    Metadata:
  
      encoder         : Lavf55.10.100
  
      Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p, 1920x1088 [SAR 1:1 DA
  
  R 30:17], q=2-31, 25 fps, 1k tbn, 1200k tbc
  
      Stream #0:1: Subtitle: ssa
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #1:0 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=  144 fps=0.0 q=-1.0 Lsize=    2451kB time=00:00:05.72 bitrate=3509.6kbits
  
  /s
  
  video:2447kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.125529%

• RTSP Streaming on iOS 6 with Xcode 4.6.1

  2 novembre 2014, par Maurice A.

  I need to develop an app what is capable of receiving a RTSP Stream.
  I tried to find solutions/tutorials in the internet for the whole day now, but without any success.
  I read a lot about using FFMPEG or Live555 (more FFMPEG, also I read that Live555 is not necessary when using the newest version of FFMPEG), but nowhere I looked it was described in a form I could understand, when I found questions on stackoverflow the answers were really short and I could not figure out what they tried to explain.
  So now I need to ask myself.
  I used "Homebrew" to download and install FFMPEG, now when I look at my dir /usr/local/
  I can see this, the installed files are contained in subfolders of "Cellar"
  

  I also tried to have a look at these projects :RTSPPlay by Mooncatventures and kxmovie by kolyvan.

  I did not really figure out how to work with these projects, the Documentation is indefinite and "murky".
  Well, when I tried to compile these projects the kxmovie failes with errors that are like "missing avformat.h",
  
  I added the dylibs from the usr/local/cellar/ffmpeg/1.2.1/lib to the project but it seems that this is not the right method.
  Nearly the same Issue with the RTSPPlay xcodeprj, it gives back the error that an "Entitlements.plist" is missing, after removing the linkings to that file completely I am getting 99+ Apple Mach-O Linker Errors, honestly I could not understand why.

  I wanted to try the Live555 too but I cant see through all these obscure and confusing files, again I could not oversee the documentation and how to build the libraries for iphoneos (I read it is the easiest way to receive RTSP Stream but it was the same stack of confusing files as the other projects had)

  Maybe if someone tried with these Projects or developed an Application himself could help me with his/her SourceCode or if somebody is seeing through all the Content of FFMPEG / Homebrew made dir’s he/she could maybe explain me how to use it, that would probably help me and all the other desperate developers who are searching for a solution.

  Just a little edit : I am trying to receive a RTSP H.264 decoded Video Stream.

  Thanks in advance, Maurice Arikoglu.
  (If you need any kind of SourceCode, Links, ScreenShots etc. please let me know)

• Combine images into a movie

  10 mars 2014, par Maged E William

  My project is to record Desktop as video daily,

  now i get to the point of record the desktop as images in *.jpeg i need to combine them as video, i don't know much about ffmpeg but i have seen this article, and i wonder if i can make all this as press of a button in C#, so i can combine the images then delete them on the form load or something

  EDIT :
  now i got the code : ffmpeg -f image2 -i foo-%03d.jpeg -r 12 -s WxH foo.avi but i don't know where to type that in my project !