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• loop over directories and merge videos

  20 septembre 2018, par Misha

  I have several directories containing between 10 and 30.mp4 files that I´d like to merge into one file in each of these directories naming them after the parent directory. I run the following command :

  for f in ./*;  do  (cd "$f"; u=${f##*/}; ffmpeg -i concat:<(printf "file '%s'\n" S*.mp4) -an -b 3000K -c:v h264_videotoolbox -y $u.mp4); done;

  but i get an error "concat :/dev/fd/63 : Invalid data found when processing input".

  The ffmpeg command works when I am not doing it in a for-loop.

  Any ideas ?

• RTSP/RTMP Video Streaming Client iOS [closed]

  28 mai 2015, par nathansizemore

  I’m in need of a open source solution/library to stream RTSP/RTMP to an iOS Application. I need to build an app that connects to a media server, and opens the provided video stream. I believe there has to be libraries out there, but I have yet to find one that is open source, compiles, actually works, and runs on iOS 5+, iPhone 4+. I do not have a preference, RTMP or RTSP will suffice. Preferably the one with the least amount of work. I have RTSP working on the Android side, but nothing for iOS yet.

  This is what I already know from research today -

  RTSP

  • Seems possible using Live555/FFMPEG
  • MooncatVenture Group - Old FFMPEG, not compatible with ARMv7s (No updates/blogs/commits in over a year)
  • DFURTSPPlayer - This is a working example.

  RTMP

  • Seems possible using Live555/FFMPEG
  • A few libraries are out there for data messaging, but that is all
  • MidnightCoders Project - Does not seem video support is build yet, as Audio is not.

  I’ve never messed with anything video related before, so encoding, frame rate, key frame, chunks, etc... is pretty foreign to me. Right now, it seems building a static binary from Live555/FFMPEG is the only solution to my problem. If so, can anyone give me a simple quickstart guide or links to a blog/example someone has out there ? I’m not looking for anything crazy, just a simple

  1. Download This - LINK
  2. Compile it like this - LINK
  3. Place it into X Folder in Xcode
  4. Create X Object
  5. Read Stream API here - LINK

  If not, anyone want to point me to a working open source library ?

  Oh yeah, this happens to be my first iPhone app and first time in Objective-C. Awesome first project, yeah ?

• doc/faq : remove "-profile option fails when encoding H.264 video with AAC audio"...

  3 janvier 2014, par Stefano Sabatini

  doc/faq : remove "-profile option fails when encoding H.264 video with AAC audio" entry
  The error was fixed in commit ce9bd303794fcc94aa232c116bece13c5994b55b
  
  more than one year ago, and does not affect all the currently supported
  
  versions.
  In particular, fix trac issue #1535.
  

  • [DH] doc/faq.texi