githubhaohao/learnffmpeg

Android FFmpeg 音视频开发教程

Github State

learnffmpeg's Issues

你好 请问我根据项目代码来播放mp3 文件声音有噪音还一断一断的

是重采样的时候的问题吗？

编译失败

有人能给一个编译好的apk吗，谢谢

Mac 如何编译支持openssl？

编译环境 AS 4.1+，NDK r21

编译环境 AS 4.1+，NDK r21

scale error code:870, mean:Error number 870 occurred

你好，我这边使用glReadPixels抓取的一帧数据，
int width = 1920;
int height = 870;
int frameRate = 60;
int fmt_size = sizeof(unsigned char) * 4;
int row_size = width * fmt_size;
int bufferSize = width * height * fmt_size * 2;
HANDLE hEvent;
unsigned char *_data;
unsigned char *_tmpdata = new unsigned char[bufferSize];
glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE /0x8035/,
_tmpdata);
for (int i = 0; i < height; i++) {
memcpy(&_data[i * row_size], &_tmpdata[(height - i - 1) * row_size],
row_size);
}

	EncoderManager::getInstance().encode(_tmpdata, width, height);

先进行转换YUV， scale时报错了。 传入的宽高是一个固定的值： 1920*870， 帮给看看

AVFrame *EncoderManager::toAVFrame(unsigned char *data, int width, int height) {
AVFrame *avFrame = av_frame_alloc();

av_image_alloc(avFrame->data, avFrame->linesize, width,
height, encoder->getCodecContext()->pix_fmt, 1);

std::int32_t row_pitch {};
row_pitch = width * 4;
const int linessizes[2] {
row_pitch, 0
};
const uint8_t *tmp[2] = { (uint8_t *)data, NULL };
SwsContext *sws = sws_getContext(width, height, AV_PIX_FMT_RGBA, width, height,
AV_PIX_FMT_YUV420P, SWS_FAST_BILINEAR, NULL, NULL, NULL);
int ret = sws_scale(sws, tmp, linessizes, 0, encoder->getCodecContext()->height,
avFrame->data, avFrame->linesize);
printfString("toAVFrame scale", ret);
return avFrame;
}

EncoderManager::encode:1920, 870
toAVFrame scale error code:870, mean:Error number 870 occurred
encode sw
MediaCodec::queueInputToEncoder::error input to encoder
queueInputToEncoder result error code:-1, mean:Operation not permitted
EncoderManager::run:frameCount:1

音视频同步

原生的ffmpeg播放rtsp延时 200+ms，这个demo怎么延时了3~4s？是因为加锁的问题吗？

项目克隆下来,跑步起来 博主 你看看啥情况

`Execution failed for task ':app:externalNativeBuildDebug'.

Build command failed.
Error while executing process C:\Users\Administrator\AppData\Local\Android\Sdk\cmake\3.6.4111459\bin\cmake.exe with arguments {--build C:\Users\Administrator\Desktop\LearnFFmpeg\app.cxx\cmake\debug\arm64-v8a --target learn-ffmpeg}
[1/1] Linking CXX shared library C:\Users\Administrator\Desktop\LearnFFmpeg\app\build\intermediates\cmake\debug\obj\arm64-v8a\liblearn-ffmpeg.so
FAILED: cmd.exe /C "cd . && C:\Users\Administrator\AppData\Local\Android\Sdk\ndk\23.1.7779620\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++.exe --target=aarch64-none-linux-android21 --gcc-toolchain=C:/Users/Administrator/AppData/Local/Android/Sdk/ndk/23.1.7779620/toolchains/llvm/prebuilt/windows-x86_64 --sysroot=C:/Users/Administrator/AppData/Local/Android/Sdk/ndk/23.1.7779620/toolchains/llvm/prebuilt/windows-x86_64/sysroot -fPIC -g -DANDROID -fdata-sections -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security -std=c++11 -frtti -fexceptions -std=gnu++11 -fno-limit-debug-info -static-libstdc++ -Wl,--build-id=sha1 -Wl,--no-rosegment -Wl,--fatal-warnings -Wl,--no-undefined -Qunused-arguments -shared -Wl,-soname,liblearn-ffmpeg.so -o C:\Users\Administrator\Desktop\LearnFFmpeg\app\build\intermediates\cmake\debug\obj\arm64-v8a\liblearn-ffmpeg.so CMakeFiles/learn-ffmpeg.dir/learn-ffmpeg.cpp.o CMakeFiles/learn-ffmpeg.dir/util/GLUtils.cpp.o CMakeFiles/learn-ffmpeg.dir/common/AVPacketQueue.cpp.o CMakeFiles/learn-ffmpeg.dir/player/FFMediaPlayer.cpp.o CMakeFiles/learn-ffmpeg.dir/player/HWCodecPlayer.cpp.o CMakeFiles/learn-ffmpeg.dir/player/PlayerWrapper.cpp.o CMakeFiles/learn-ffmpeg.dir/player/decoder/AudioDecoder.cpp.o CMakeFiles/learn-ffmpeg.dir/player/decoder/DecoderBase.cpp.o CMakeFiles/learn-ffmpeg.dir/player/decoder/VideoDecoder.cpp.o CMakeFiles/learn-ffmpeg.dir/player/render/video/NativeRender.cpp.o CMakeFiles/learn-ffmpeg.dir/player/render/video/VRGLRender.cpp.o CMakeFiles/learn-ffmpeg.dir/player/render/video/VideoGLRender.cpp.o CMakeFiles/learn-ffmpeg.dir/player/render/audio/AudioGLRender.cpp.o CMakeFiles/learn-ffmpeg.dir/player/render/audio/OpenSLRender.cpp.o CMakeFiles/learn-ffmpeg.dir/recorder/SingleVideoRecorder.cpp.o CMakeFiles/learn-ffmpeg.dir/recorder/SingleAudioRecorder.cpp.o CMakeFiles/learn-ffmpeg.dir/recorder/MediaRecorderContext.cpp.o CMakeFiles/learn-ffmpeg.dir/recorder/GLCameraRender.cpp.o CMakeFiles/learn-ffmpeg.dir/recorder/MediaRecorder.cpp.o -LC:/Users/Administrator/Desktop/LearnFFmpeg/app/src/main/cpp/../jniLibs/arm64-v8a -lavformat -lavcodec -lavfilter -lswresample -lswscale -lavutil -lfdk-aac -lx264 -landroid -lmediandk -lEGL -lGLESv3 -lOpenSLES -llog -lm -lz -latomic -lm && cd ."
ld: error: relocation R_AARCH64_ADR_PREL_PG_HI21 cannot be used against symbol ff_cos_32; recompile with -fPIC

`

边播边录 目前不支持 录制声音啊

播放器边播边录 目前不支持 录制声音啊 ，视频是可以录制 ，希望大佬可以补上这部分功能

视频录制时声音与图像不同步

15秒的录制中后5秒声音和图像不同步，声音远快于录像。

找不到 GLESv3

编译的时候，找不到 openGL的库

/Users/yummylau/ffmpeg/android-ndk-r21b/toolchains/llvm/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: cannot find -lGLESv3

添加target NDK version,可保证编译通过。

ndkVersion "21.4.7075529"