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http://stackoverflow.com/questions/tagged/libx264

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Make images to video using FFMPEG on android not working

6 mars 2015, par Salmaan

I built ffmpeg 2.5.4 with libx264 and am using these commands but they are giving error...
On previous version of ffmpeg they were working fine...

Here is the command i am using to convert images to video

          String[] ffmpegCommand = {
                    "/data/data/uk.org.humanfocus.hfi/ffmpeg",
                    "-r",
                    Fps,
                    "-i",
                    Environment.getExternalStorageDirectory().getPath()
                            + "/HumanFocus/MarkerFrame/frame%05d.jpg",
                    "-qscale", "0",
                    mFilePathMarker };

Here is my ffmpeg Log

03-06 10:00:12.579: V/asd(10011): ***Input #0, image2, from '/storage/emulated/0/HumanFocus/MarkerFrame/frame%05d.jpg':***
03-06 10:00:12.579: V/asd(10011): ***  Duration: 00:00:02.32, start: 0.000000, bitrate: N/A***
03-06 10:00:12.584: V/asd(10011): ***    Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1279x719 [SAR 1:1 DAR 1279:719], 25 fps, 25 tbr, 25 tbn, 25 tbc***
03-06 10:00:12.584: V/asd(10011): ***Please use -q:a or -q:v, -qscale is ambiguous***
03-06 10:00:12.589: V/asd(10011): ***No pixel format specified, yuvj420p for H.264 encoding chosen.***
03-06 10:00:12.589: V/asd(10011): ***Use -pix_fmt yuv420p for compatibility with outdated media players.***
03-06 10:00:12.594: V/asd(10011): ***[libx264 @ 0x52e80] width not divisible by 2 (1279x719)***
03-06 10:00:12.594: V/asd(10011): ***Output #0, mp4, to '/storage/emulated/0/HumanFocus/WPOvideos/TEMP/20150306050004.mp4':***
03-06 10:00:12.594: V/asd(10011): ***    Stream #0:0: Video: h264, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 11.40 fps***
03-06 10:00:12.594: V/asd(10011): ***    Metadata:***
03-06 10:00:12.594: V/asd(10011): ***      encoder         : Lavc56.13.100 libx264***
03-06 10:00:12.594: V/asd(10011): ***Stream mapping:***
03-06 10:00:12.594: V/asd(10011): ***  Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))***
03-06 10:00:12.594: V/asd(10011): ***Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height***

Please help me out...
Where is the issue?

Android Error While Using FFMPEG Commands - error while opening encoder for output stream - maybe incorrect parameters such as bit_rate etc

5 mars 2015, par Arslan Ahmad

I compiled ffmpeg with libx264 on linux and now when i am running this command

String[] ffmpegCommandImages = {
                    "/data/data/uk.org.humanfocus.hfi/ffmpeg",
                    "-i", videoPath,
                    "-b:v", "1000k",
                    "-vf", "scale=-1:576",
                    "-c:a", "copy",
                     "-c:v", "libx264", 
                    "-threads", "12",
                    "-b:a", "196k",
                    to };

This is the error I get, posted the log...
Please help me out.

***Starting FFMPEG***
***ffmpeg version 2.5.4 Copyright (c) 2000-2015 the FFmpeg developers***   ***  built on Mar  5 2015 19:02:01 with gcc 4.8 (GCC)***   V/asd(26115): ***  configuration:
--prefix=/home/hfi/Downloads/android-ndk-r10d/sources/ffmpeg-2.5.4/android/arm --enable-shared --disable-static --disable-doc --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-avdevice --disable-doc --disable-symver --cross-prefix=/home/hfi/Downloads/android-ndk-r10d/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-
--target-os=linux --arch=arm --enable-cross-compile --enable-libx264 --enable-gpl --sysroot=/home/hfi/Downloads/android-ndk-r10d/platforms/android-9/arch-arm
--extra-cflags='-Os -fpic -I /usr/local/include -marm' --extra-ldflags=' -L /usr/local/lib '***
***  libavutil      54. 15.100 / 54. 15.100***
***  libavcodec     56. 13.100 / 56. 13.100***
***  libavformat    56. 15.102 / 56. 15.102***
***  libavfilter     5.  2.103 /  5.  2.103***
***  libswscale      3.  1.101 /  3.  1.101***
***  libswresample   1.  1.100 /  1.  1.100***
***  libpostproc    53.  3.100 / 53.  3.100*** E/Runnable(26115): CAlled V/asd(26115): ***Input #0, image2, from '/storage/emulated/0/HumanFocus/MarkerFrame/frame%05d.jpg':*** V/asd(26115): ***  Duration: 00:00:01.76, start: 0.000000, bitrate: N/A*** V/asd(26115): ***    Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1279x719 [SAR 1:1 DAR 1279:719], 25 fps, 25 tbr, 25 tbn, 25 tbc*** V/asd(26115): ***Please use -q:a or -q:v,
-qscale is ambiguous*** V/asd(26115): ***No pixel format specified, yuvj420p for H.264 encoding chosen.*** V/asd(26115): ***Use -pix_fmt yuv420p for compatibility with outdated media players.*** V/asd(26115): ***[libx264 @ 0x52e80] width not divisible by 2 (1279x719)*** V/asd(26115): ***Output #0, mp4, to '/storage/emulated/0/HumanFocus/WPOvideos/TEMP/20150305144005.mp4':*** V/asd(26115): ***    Stream #0:0: Video: h264, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 11 fps*** V/asd(26115): ***    Metadata:*** V/asd(26115): ***      encoder         : Lavc56.13.100 libx264*** V/asd(26115): ***Stream mapping:*** V/asd(26115): ***  Stream #0:0 ->
#0:0 (mjpeg (native) -> h264 (libx264))*** V/asd(26115): ***Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height*** V/asdas(26115):
***Ending FFMPEG***

compile ffmpeg with libx264 for android

5 mars 2015, par Arslan Ahmad

What is wrong with the libx264 path please anyone help me? I have compiled libx264 latest source code. When I compiled the ffmpeg source using below x264 path . It wont allow me to record video. Note that: I am compiling libraries by linux

#!/bin/bash
######################################################
# Usage:
# put this script in top of FFmpeg source tree
# ./build_android
# It generates binary for following architectures:
# ARMv6 
# ARMv6+VFP 
# ARMv7+VFM-�d16 (Tegra2) 
# ARMv7+Neon (Cortex-A8)
# Customizing:
# 1. Feel free to change ./configure parameters for more features
# 2. To adapt other ARM variants
# set $CPU and $OPTIMIZE_CFLAGS 
# call build_one
######################################################

HOME=/home
NDK=$HOME/hfi/Downloads/android-ndk-r10d
PLATFORM=$NDK/platforms/android-9/arch-arm
SYSROOT=$PLATFORM
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64
TOOLCHAIN=$PREBUILT

function build_one
{
./configure \
--prefix=$PREFIX \
--enable-shared \
--enable-nonfree \
--enable-gpl \
--enable-libx264 \
--disable-doc \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffprobe \
--disable-ffserver \
--disable-avdevice \
--disable-doc \
--disable-symver \
--cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
--target-os=linux \
--arch=arm \
--enable-cross-compile \
--sysroot=$SYSROOT \
--extra-cflags="-Os -I /usr/local/include +-fpic $ADDI_CFLAGS" \
--extra-ldflags="$ADDI_LDFLAGS" \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make
make install
}
CPU=arm
PREFIX=$(pwd)/android/$CPU
ADDI_CFLAGS="-marm"
build_one

libx264 bitrate to high for streaming

26 février 2015, par KevinA

I'm using libx264 to encode video captured at 1080p 24fps from a video camera. The output of the encoder goes to Live555 for streaming. I cannot get the bitrate below 30 mb/s.

My Current Settings for x264 are:

if (x264_param_default_preset(&m_pParam, "ultrafast", "zerolatency") != 0){
    return false;
}
int fps = 24;
m_pParam.i_threads = 1;
m_pParam.i_fps_num = fps;
m_pParam.i_fps_den = 1;
m_pParam.i_width = m_iWidthOut;
m_pParam.i_height = m_iHeightOut;

// One keyframe per X frames:
m_pParam.i_keyint_max = 60;

//Rate control:
m_pParam.rc.i_rc_method = X264_RC_CRF;
m_pParam.rc.f_rf_constant = fps - 5;
m_pParam.rc.f_rf_constant_max = fps + 5;
//m_pParam.i_sps_id = 7;
//For streaming:
m_pParam.b_repeat_headers = 1;
m_pParam.b_annexb = 1;
m_pParam.b_intra_refresh = 1;

if (x264_param_apply_profile(&m_pParam, "main") != 0) {
    return false;
}

return true;

Changing the preset seems to only slow the encoding rate and consequently the frame rate.

How can I get the bitrate below 30mb/s so I can stream to something like a phone?

Confused about x264 and encoding video frames

26 février 2015, par spartygw

I built a test driver for encoding a series of images I have captured. I am using libx264 and based my driver off of this guy's answer:

StackOverflow link

In my case I am starting out by reading in a JPG image and converting to YUV and passing that same frame over and over in a loop to the x264 encoder.

My expectation was that since the frame is the same that the output from the encoder would be very small and constant.

Instead I find that the NAL payload is varied from a few bytes to a few KB and also varies highly depending on the frame rate I specify in the encoder parameters.

Obviously I don't understand video encoding. Why does the output size vary so much?

int main() 
{
  Image image(WIDTH, HEIGHT);
  image.FromJpeg("frame-1.jpg");

  unsigned char *data = image.GetRGB();

  x264_param_t param;

  x264_param_default_preset(&param, "fast", "zerolatency");
  param.i_threads = 1;
  param.i_width = WIDTH;
  param.i_height = HEIGHT;
  param.i_fps_num = FPS;
  param.i_fps_den = 1;

  // Intra refres:
  param.i_keyint_max = FPS;
  param.b_intra_refresh = 1;

  //Rate control:
  param.rc.i_rc_method = X264_RC_CRF;
  param.rc.f_rf_constant = FPS-5;
  param.rc.f_rf_constant_max = FPS+5;

  //For streaming:
  param.b_repeat_headers = 1;
  param.b_annexb = 1;

  x264_param_apply_profile(&param, "baseline");

  // initialize the encoder
  x264_t* encoder = x264_encoder_open(&param);
  x264_picture_t pic_in, pic_out;
  x264_picture_alloc(&pic_in, X264_CSP_I420, WIDTH, HEIGHT);
  // X264 expects YUV420P data use libswscale 
  // (from ffmpeg) to convert images to the right format
  struct SwsContext* convertCtx =
        sws_getContext(WIDTH, HEIGHT, PIX_FMT_RGB24, WIDTH, HEIGHT,
                       PIX_FMT_YUV420P, SWS_FAST_BILINEAR,
                       NULL, NULL, NULL);

  // encoding is as simple as this then, for each frame do:
  // data is a pointer to your RGB structure
  int srcstride = WIDTH*3; //RGB stride is just 3*width
  sws_scale(convertCtx, &data, &srcstride, 0, HEIGHT,
            pic_in.img.plane, pic_in.img.i_stride);
  x264_nal_t* nals;
  int i_nals;
  int frame_size =
        x264_encoder_encode(encoder, &nals, &i_nals, &pic_in, &pic_out);

  int max_loop=15;
  int this_loop=1;

  while (frame_size >= 0 && --max_loop)
  {
      cout << "------------" << this_loop++ << "-----------------\n";
      cout << "Frame size = " << frame_size << endl;
      cout << "output has " << pic_out.img.i_csp << " colorspace\n";
      cout << "output has " << pic_out.img.i_plane << " # img planes\n";

      cout << "i_nals = " << i_nals << endl;
      for (int n=0; n

1 | ... | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | ... | 88

Newest 'libx264' Questions - Stack Overflow

Les articles publiés sur le site

Make images to video using FFMPEG on android not working

Android Error While Using FFMPEG Commands - error while opening encoder for output stream - maybe incorrect parameters such as bit_rate etc

compile ffmpeg with libx264 for android

libx264 bitrate to high for streaming

Confused about x264 and encoding video frames

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