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• "Amix" and "adelay" combined leads to "Error while filtering : Cannot allocate memory"

  10 février 2016, par Harald Nordgren

  I was trying to add to audio clips together (using amix) while delaying one of them (with adelay). I used the following command

  ffmpeg -i org/onclassical_demo_luisi_chopin_scherzo_2_31_small-version_ii-ending.wav \
  
  -i org/all_u_had_2_say.wav -filter_complex \
  
  "[1]adelay=1000[del1];[0][del1]amix" out.wav

  and get the following output

  ffmpeg version N-77387-g9d38f06 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
    configuration: --enable-libmp3lame --enable-gpl --enable-libx264 --enable-libx265
  
    libavutil      55. 11.100 / 55. 11.100
  
    libavcodec     57. 18.100 / 57. 18.100
  
    libavformat    57. 20.100 / 57. 20.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6. 21.100 /  6. 21.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Guessed Channel Layout for  Input Stream #0.0 : stereo
  
  Input #0, wav, from 'org/onclassical_demo_luisi_chopin_scherzo_2_31_small-version_ii-ending.wav':
  
    Duration: 00:02:18.26, bitrate: 1411 kb/s
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
  
  Guessed Channel Layout for  Input Stream #1.0 : mono
  
  Input #1, wav, from 'org/all_u_had_2_say.wav':
  
    Duration: 00:00:03.85, bitrate: 88 kb/s
  
      Stream #1:0: Audio: pcm_u8 ([1][0][0][0] / 0x0001), 11025 Hz, 1 channels, u8, 88 kb/s
  
  Output #0, wav, to 'out.wav':
  
    Metadata:
  
      ISFT            : Lavf57.20.100
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 11025 Hz, mono, s16, 176 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc57.18.100 pcm_s16le
  
  Stream mapping:
  
    Stream #0:0 (pcm_s16le) -> amix:input0
  
    Stream #1:0 (pcm_u8) -> adelay
  
    amix -> Stream #0:0 (pcm_s16le)
  
  Press [q] to stop, [?] for help
  
  Error while filtering: Cannot allocate memory
  
  size=      83kB time=00:00:03.85 bitrate= 176.6kbits/s speed= 213x    
  
  video:0kB audio:83kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.091808%

  Maybe there is some incompatibility between the streams (pcm_s16le, 44100 Hz, 2 channels vs. pcm_u8, 11025 Hz, 1 channel) that need to be handled first, but running only amix works so that doesn’t actually seem to be the case.

• gcc "relocation R_X86_64_PC32 against symbol `ff_M24A'" error when linking statically against ffmpeg on linux

  22 janvier 2016, par YB_Evil

  I am trying to build a JNI shared library which statically links to ffmpeg.

  But at the linking stage, gcc fails with the following error :

  /usr/bin/ld: ./lib_lin64/libswscale.a(swscale.o): relocation R_X86_64_PC32 against symbol `ff_M24A' can not be used when making a shared object; recompile with -fPIC

  I am using the following commands to compile my jni library :

  gcc -I $JAVA_HOME/include -I $JAVA_HOME/include/linux -I ./include -fPIC -c *.c
  

  gcc -shared -Wl,--no-undefined -o libnv_avc_dec.so *.o -Wl,-Bstatic -L./lib_lin64 -lavcodec -lavutil -lswresample -lswscale -Wl,-Bdynamic -lm

  And I only use h264 decoding feature, so I am also building ffmpeg from source with the minimal required feature set. The ./configure command I use is :

  ./configure \
--enable-pic --prefix=ffmpeg-dist \
--disable-debug --enable-version3 --enable-gpl \
--disable-everything --enable-hwaccel=h264_vdpau --enable-hwaccel=h264_vaapi --enable-hwaccel=h264_qsv --enable-hwaccel=h264_mmal \
--enable-decoder=h264 --enable-decoder=h264_vdpau --enable-decoder=h264_crystalhd --enable-decoder=h264_mmal --enable-decoder=h264_qsv \
--disable-iconv --disable-securetransport --disable-xlib --disable-zlib --disable-lzma  --disable-bzlib  --disable-doc --disable-programs --disable-avformat --disable-avfilter --disable-postproc

  So, as I understand, the linker tells me that ffmpeg should be compiled with -fPIC flag in order to make a shared library. But I believe that I’ve already done so by specifying the —enable-pic configure flag. And I am pretty much stuck here because I am not very familiar with autotools, nor with ffmpeg build process in particular.

  If this is the issue of ffmpeg .a libs not being compiled with -fPIC flag, how can i force it ? And if this is not the case, what am i doing wrong and how can i fix this error ?

  Environment details : Ubuntu 14.04.3 64-bit in Virtualbox, gcc 4.8.5 and 5.3 (both give the same results), ffmpeg v.2.8.5

• SocialEngine "Tasks have not executed for more than 180 seconds." error on Video upload using FFMPEG

  17 juillet 2017, par Amit

  I’ve installed FFMPEG on server to support video upload in Socialengine.

  Now I can see the option to upload Video from "My Computer" but after I upload a video I see "Your video is in queue to be processed - you will be notified when it is ready to be viewed."

  If I check "Task Scheduler" in Admin panel it shows "Tasks have not executed for more than 180 seconds." with 0% progress and after a while it fails.