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• Image to MPEG on Linux works, same code on Android = green video

  5 avril 2018, par JScoobyCed

  EDIT
  I have check the execution and found that the error is not (yet) at the swscale point. My current issue is that the JPG image is not found :
  No such file or directory
  when doing the avformat_open_input(&pFormatCtx, imageFileName, NULL, NULL);
  Before you tell me I need to register anything, I can tell I already did (I updated the code below).
  I also added the Android permission to access the external storage (I don’t think it is related to Android since I can already write to the /mnt/sdcard/ where the image is also located)
  END EDIT

  I have been through several tutorials (including the few posted from SO, i.e. http://dranger.com/ffmpeg/, how to compile ffmpeg for Android...,been through dolphin-player source code). Here is what I have :
  . Compiled ffmpeg for android
  . Ran basic tutorials using NDK to create a dummy video on my android device
  . been able to generate a MPEG2 video from images on Ubuntu using a modified version of dummy video code above and a lot of Googling
  . running the new code on Android device gives a green screen video (duration 1 sec whatever the number of frames I encode)

  I saw another post about iPhone in a similar situation that mentioned the ARM processor optimization could be the culprit. I tried a few ldextra-flags (-arch armv7-a and similar) to no success.

  I include at the end the code that loads the image. Is there something different to do on Android than on linux ? Is my ffmpeg build not correct for Android video encoding ?

  void copyFrame(AVCodecContext *destContext, AVFrame* dest,
  
              AVCodecContext *srcContext, AVFrame* source) {
  
  struct SwsContext *swsContext;
  
  swsContext = sws_getContext(srcContext->width, srcContext->height, srcContext->pix_fmt,
  
                  destContext->width, destContext->height, destContext->pix_fmt,
  
                  SWS_FAST_BILINEAR, NULL, NULL, NULL);
  
  sws_scale(swsContext, source->data, source->linesize, 0, srcContext->height, dest->data, dest->linesize);
  
  sws_freeContext(swsContext);
  
  }
  
  
  
  int loadFromFile(const char* imageFileName, AVFrame* realPicture, AVCodecContext* videoContext) {
  
  AVFormatContext *pFormatCtx = NULL;
  
  avcodec_register_all();
  
  av_register_all();
  
  
  
  int ret = avformat_open_input(&pFormatCtx, imageFileName, NULL, NULL);
  
  if (ret != 0) {
  
      // ERROR hapening here
  
      // Can't open image file. Use strerror(AVERROR(ret))) for details
  
      return ERR_CANNOT_OPEN_IMAGE;
  
  }
  
  
  
  AVCodecContext *pCodecCtx;
  
  
  
  pCodecCtx = pFormatCtx->streams[0]->codec;
  
  pCodecCtx->width = W_VIDEO;
  
  pCodecCtx->height = H_VIDEO;
  
  pCodecCtx->pix_fmt = PIX_FMT_YUV420P;
  
  
  
  // Find the decoder for the video stream
  
  AVCodec *pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
  
  if (!pCodec) {
  
      // Codec not found
  
      return ERR_CODEC_NOT_FOUND;
  
  }
  
  
  
  // Open codec
  
  if (avcodec_open(pCodecCtx, pCodec) < 0) {
  
      // Could not open codec
  
      return ERR_CANNOT_OPEN_CODEC;
  
  }
  
  
  
  // 
  
  AVFrame *pFrame;
  
  
  
  pFrame = avcodec_alloc_frame();
  
  
  
  if (!pFrame) {
  
      // Can't allocate memory for AVFrame
  
      return ERR_CANNOT_ALLOC_MEM;
  
  }
  
  
  
  int frameFinished;
  
  int numBytes;
  
  
  
  // Determine required buffer size and allocate buffer
  
  numBytes = avpicture_get_size(PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);
  
  uint8_t *buffer = (uint8_t *) av_malloc(numBytes * sizeof (uint8_t));
  
  
  
  avpicture_fill((AVPicture *) pFrame, buffer, PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);
  
  AVPacket packet;
  
  int res = 0;
  
  while (av_read_frame(pFormatCtx, &packet) >= 0) {
  
      if (packet.stream_index != 0)
  
          continue;
  
  
  
      ret = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
  
      if (ret > 0) {
  
          // now, load the useful info into realPicture
  
          copyFrame(videoContext, realPicture, pCodecCtx, pFrame);
  
          // Free the packet that was allocated by av_read_frame
  
          av_free_packet(&packet);
  
          return 0;
  
      } else {
  
          // Error decoding frame. Use strerror(AVERROR(ret))) for details
  
          res = ERR_DECODE_FRAME;
  
      }
  
  }
  
  av_free(pFrame);
  
  
  
  // close codec
  
  avcodec_close(pCodecCtx);
  
  
  
  // Close the image file
  
  av_close_input_file(pFormatCtx);
  
  
  
  return res;
  
  }

  Some ./configure options :
  --extra-cflags="-O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 -mfloat-abi=softfp -mfpu=vfp -marm -march=armv7-a -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"

  --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog"

  --arch=armv7-a --enable-armv5te --enable-armv6 --enable-armvfp --enable-memalign-hack

• Ffmpeg not compiling

  25 mai 2018, par Robin Betka

  I’m trying to compile ffmpeg 4.0 for Android (using Ubuntu 64 bit) but I can not get it to work.
  I was able to compile it for Linux itself fairly fast, but now struggling using the NDK. I’m unexperienced with this so I might have some major flaw somewhere. All paths and files exist. Github tutorials are extremely outdated and don’t work as well for me with different errors.

  Getting following error :

  In file included from ./libavformat/internal.h:24:0,
  
               from libavdevice/alldevices.c:23:
  
  /home/lit/Android/Sdk/ndk-bundle/toolchains/arm-linux-androideabi- 
  
  4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux- 
  
  androideabi/4.9.x/include/stdint.h:9:26: fatal error: stdint.h: No such file 
  
  or directory
  
  # include_next 
  
                        ^
  
  compilation terminated.
  
  ffbuild/common.mak:60: recipe for target 'libavdevice/alldevices.o' failed
  
  make: *** [libavdevice/alldevices.o] Error 1

  My build script :

  SYSROOT=/home/lit/Android/Sdk/ndk-bundle/platforms/android-14/arch-arm/
  
  TOOLCHAIN=/home/lit/Android/Sdk/ndk-bundle/toolchains/arm-linux-androideabi- 
  
  4.9/prebuilt/linux-x86_64
  
  
  
  cd ffmpeg/ffmpeg && \
  
  PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" 
  
  ./configure \
  
  --prefix="$HOME/ffmpeg_build" \
  
  --pkg-config-flags="--static" \
  
  --extra-cflags="-O3 -Wall -pipe -ffast-math -fstrict-aliasing -Werror=strict- aliasing -Wno-psabi -Wa,--noexecstack -DANDROID -DNDEBUG-march=armv5te -mtune=arm9tdmi -msoft-float"\
  
  --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
  
  --bindir="$HOME/bin" \
  
  --arch=arm \
  
  --target-os=linux \
  
  --enable-cross-compile \
  
  --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
  --cpu=armv5te \
  
  --sysroot=$SYSROOT \
  
  --enable-gpl \
  
  --enable-small \
  
  --enable-nonfree && \
  
  
  
  PATH="$HOME/bin:$PATH" make && \
  
  make -j2 && \
  
  make install && \
  
  hash -r

  Thank you for your help.

• ffmpeg first segment does not have audio

  5 mars 2018, par Giorgi Peikrishvili

  I’m recording http stream using ffmpeg. Here is my command :

  ffmpeg -i https://tv-tbs-silk-front 1.adjara.com/4w/rustavi2hd/index.m3u8\?token\=376d9f864d81c7f85410ac5d3d0bde3dd6574daf-Hog86dAubE-1522939917-1520175117 -c copy -map 0 -bsf:a aac_adtstoasc -flags +global_header -f segment -segment_time 10 -force_key_frames 10 -segment_format_options movflags=+faststart -reset_timestamps 1 -strftime 1 %Y-%m-%d_%H-%M-%S.mov

  It makes segments as should be, but the only first segment does not have sound, others does.
  Any ideas about that ?

  Update as suggested in comments :
  Here is full output

  ffmpeg -i  -c copy -map 0 -g 10 -bsf:a aac_adtstoasc -flags 
  
  +global_header -f segment -segment_time 10 -force_key_frames 10 -
  
  segment_format_options movflags=+faststart -reset_timestamps 1 -
  
  strftime 1 %Y-%m-%d_%H-%M-%S.mov
  
  ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers 
  
  built with Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 
  
  3.6.0svn) configuration: --prefix=/Users/Cipusha/anaconda2 
  
  --disable-doc --enable-shared --enable-static --extra-cflags='-Wall -g 
  
  -m64 -pipe -O3 -march=x86-64 -fPIC -I/Users/Cipusha/anaconda2/include' 
  
  --extra-cxxflags='=-Wall -g -m64 -pipe -O3 -march=x86-64 -fPIC' --
  
  extra-libs='-L/Users/Cipusha/anaconda2/lib -lz' --enable-pic --enable-
  
  gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --
  
  enable-libx264
  
  
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  
  
  Input #0, hls,applehttp, from 'https://tv-tbs-silk-front-
  
  1.adjara.com/4w/rustavi2hd/index.m3u8?
  
  token=376d9f864d81c7f85410ac5d3d0bde3dd6574daf-Hog86dAubE-1522939917-
  
  1520175117':
  
  Duration: N/A, start: 58671.490378, bitrate: N/A
  
    Program 0 
  
      Metadata:
  
        variant_bitrate : 2953271
  
      Stream #0:0: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, 
  
  stereo, fltp
  
  Metadata:
  
        variant_bitrate : 2953271
  
      Stream #0:1: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 
  
  720x576 [SAR 1:1 DAR 5:4], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Metadata:
  
         variant_bitrate : 2953271
  
  Output #0, segment, to '%Y-%m-%d_%H-%M-%S.mov':
  
    Metadata:
  
      encoder         : Lavf57.56.101
  
      Stream #0:0: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, 
  
  stereo
  
      Metadata:
  
        variant_bitrate : 2953271
  
      Stream #0:1: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 
  
  720x576 [SAR 1:1 DAR 5:4], q=2-31, 25 fps, 25 tbr, 12800 tbn, 25 tbc
  
      Metadata:
  
        variant_bitrate : 2953271
  
  Stream mapping:
  
        Stream #0:0 -> #0:0 (copy)
  
        Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [mov @ 0x7f9c97018e00] Starting second pass: moving the moov atom to the beginning of the file
  
  [mov @ 0x7f9c96803200] Starting second pass: moving the moov atom to the beginning of the file
  
  [mov @ 0x7f9c98000000] Starting second pass: moving the moov atom to the beginning of the file
  
  frame=  581 fps= 38 q=-1.0 Lsize=N/A time=00:00:23.20 bitrate=N/A speed= 1.5x

  Thank you very much