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• avformat/rtpdec : Add support for 24 bit RTSP audio playback

  4 novembre 2016, par Timur Aydin

  avformat/rtpdec : Add support for 24 bit RTSP audio playback
  When ffplay is used to play from the RTSP URL that serves 24 bit audio
  
  content, ffplay fails to recognize the audio codec format. The attached
  
  patch adds support for playing 24 bit audio content over RTSP by
  
  defining a dynamic payload handler for "L24".
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/rtpdec.c

• ffmpeg live dash content is not being played after loop

  27 octobre 2022, par Przemo

  I have problem with audio and video presence after looping the files used in live dash streaming.
  
I am using following ffmpeg command :

  


  ffmpeg -re -fflags +genpts -stream_loop -1 
-i H265_2160p60_VBR_30Mbps_OTT.mp4 
-i H265_1440p60_VBR_20Mbps_OTT.mp4 
-i H265_1080p60_VBR_15Mbps_OTT.mp4 
-i H265_900p60_VBR_10Mbps_OTT.mp4 
-i H265_720p60_VBR_5Mbps_OTT.mp4 
-i H265_576p60_VBR_1Mbps_OTT.mp4 
-map 0 -map 1 -map 2 -map 3 -map 4 -map 5 
-c copy 
-streaming 1 -use_timeline 1 -use_template 1 -window_size 30 -remove_at_exit 1 -segment_wrap 30 
-adaptation_sets "id=0,seg_duration=2,streams=v id=1,seg_duration=2,streams=a" 
-init_seg_name 'live-$RepresentationID$-init.m4s' -media_seg_name 'live-$RepresentationID$-$Time$.m4s' 
-f dash video/out.mpd


  


  Main problem is that the A/V is present until the streams loop (every stream has the same length).
  
FFmpeg is still processing the files but the client is not able to play the content anymore.

  


  Additional problem is that the dash.js is not able to play the content due to dynamic manifest. Is there an option in ffmpeg to change type on manifest ?

  


• Android FFmpeg build : cannot find -lavutil

  4 novembre 2016, par Jon G

  I am trying to build FFmpeg for Android JNI using the guide here (forked from appunite’s build). One difference between my build and theirs is that I am trying to use the FFmpeg master branch instead of commit 82db8ee, maybe that is relevant. I am coming across a build issue when I try to build for multiple architectures in a row.

  The code that is running is :

  ${LD} -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -L$PREFIX/lib -soname $SONAME -shared -nostdlib -Bsymbolic --whole-archive --no-undefined -o $OUT_LIBRARY -lavformat -lavcodec -lx264 -lavfilter -lavutil -lswscale -lswresample -lavresample -lfribidi -lvo-aacenc -lvo-amrwbenc -lpostproc -lc -lm -lz -ldl -llog --dynamic-linker=/system/bin/linker -zmuldefs $PREBUILT/lib/gcc/$EABIARCH/$COMPILATOR_VERSION.x/libgcc.a

  The logs that are outputted in the MIPS case are :

  ...
  
  FINISHED ffmpeg for mips
  
  + build_one
  
  + echo 'Starting build one for mips'
  
  Starting build one for mips
  
  + cd ffmpeg
  
  + /home/jon/Development/android-ndk-r10e/toolchains/mipsel-linux-android-4.9/prebuilt/linux-x86_64/bin/mipsel-linux-android-ld -rpath-link=/home/jon/Development/android-ndk-r10e/platforms/android-9/arch-mips//usr/lib -L/home/jon/Development/android-ndk-r10e/platforms/android-9/arch-mips//usr/lib -L/home/jon/workspace/kyawkyaw-AndroidFFmpeg/library-jni/jni/ffmpeg-build/mips/lib -soname libffmpeg.so -shared -nostdlib -Bsymbolic --whole-archive --no-undefined -o /home/jon/workspace/kyawkyaw-AndroidFFmpeg/library-jni/jni/ffmpeg-build/mips/libffmpeg.so -lavcodec -lavformat -lavresample -lavutil -lfdk-aac -lswresample -lx264 -lswscale -lc -lm -lz -ldl -llog --dynamic-linker=/system/bin/linker -zmuldefs /home/jon/Development/android-ndk-r10e/toolchains/mipsel-linux-android-4.9/prebuilt/linux-x86_64/lib/gcc/mipsel-linux-android/4.9/libgcc.a
  
  /home/jon/Development/android-ndk-r10e/toolchains/mipsel-linux-android-4.9/prebuilt/linux-x86_64/bin/mipsel-linux-android-ld: skipping incompatible /home/jon/workspace/kyawkyaw-AndroidFFmpeg/library-jni/jni/ffmpeg-build/mips/lib/libavutil.a when searching for -lavutil
  
  /home/jon/Development/android-ndk-r10e/toolchains/mipsel-linux-android-4.9/prebuilt/linux-x86_64/bin/mipsel-linux-android-ld: cannot find -lavutil

  Everything seems successful until that point. Why would libavutil.a be incompatible ?

  I find that if I revert FFmpeg to commit 82db8ee, build for MIPS (successful), change back to master, then build for MIPS again, it does not raise the error. Perhaps something is not being cleaned up properly ?