Recherche avancée

Sur d’autres sites (6891)

• SDL2.0 Alternative for SDL_Overlay

  19 juin 2019, par Josh

  So I’ve been trying to go through the following tutorial on ffmpeg : http://dranger.com/ffmpeg/tutorial02.html

  However, when I try to compile using gcc, I get the following output :

  root:/Users/mbrodeur/Downloads/HACKATHON CONTENT/Tutorials-> gcc -o tutorial02 tutorial02.c -lavutil -lavformat -lavcodec -lz -lavutil -lm -lswscale -D_THREAD_SAFE -lSDL2
  
  tutorial02.c: In function ‘main’:
  
  tutorial02.c:41: error: ‘SDL_Overlay’ undeclared (first use in this function)
  
  tutorial02.c:41: error: (Each undeclared identifier is reported only once
  
  tutorial02.c:41: error: for each function it appears in.)
  
  tutorial02.c:41: error: ‘bmp’ undeclared (first use in this function)
  
  tutorial02.c:98: warning: assignment makes pointer from integer without a cast
  
  tutorial02.c:110: error: ‘SDL_YV12_OVERLAY’ undeclared (first use in this function)

  Now, I read that SDL_Overlay is no longer used in SDL2, so therein lies the problem. I’ve been poking around, but can’t seem to find anything helpful. Is there a replacement for SDL_Overlay ? Is it necessary ?

  SDL_Overlay is used in the following context :

  SDL_Overlay     *bmp;
  
  bmp = SDL_CreateYUVOverlay(pCodecCtx->width, pCodecCtx->height,
  
                         SDL_YV12_OVERLAY, screen);

• How to use PHP FFMPEG to alter audio binary header bytes offset

  27 mai 2019, par SomniusX

  I use the following method to create a WNB file that is flashable to my Electric Unicycle Ninebot Z10

  First audacity to make the file raw pcm 16khz 16bit mono littleendian
  Then wnb-slicer golang app to convert that raw file into wnb.

  Today i did the same with ffmpeg

  ffmpeg -i $1 -acodec pcm_s16le -f s16le -ac 1 -ar 16000 -acodec pcm_s16le $1.raw
  
  ../wnb-slicer-master/wnb-slicer -file-name $1.raw

  where $1 is the original file

  About an hour ago i did the ffmpeg part with php-ffmpeg but i can’t have golang run on a webserver.

  So i thought if ffmpeg does bytes manipulation like the golang app does here

  Thank you in advance !

  p.s. this project will help all electric unicycle owners of the Z series wheels to change audio voices/sounds on their wheels !!

• avcodec.h and avfiltergraph.h files are not found

  12 avril 2019, par Dries Jans

  I’m testing out a RTSP encoded stream transmitter using mpeg4. I found the code from this topic : FFMPEG to send RTSP encoded stream C++

  I think there is a problem with different build versions. I’m using the
  4.1.1 build.

  I’ve already tried to use the avcodec header in the libavcodec directory, but I have no idea if this is correct because I can’t find a replacement for the avfiltergraph header. I tried replacing it with avfilter header, but this gave an error on the CODEC_ID_H264.

  #include <libavfilter></libavfilter>avfiltergraph.h>
  
  #include <libavfilter></libavfilter>avcodec.h>

  You also need to execute next command to provide an listening service.

  ffplay -rtsp_flags listen -i rtsp://127.0.0.1:8554/live.sdp