OpenSL ES (Open Sound Library for Embedded Systems) is a royalty-free, cross-platform, hardware-accelerated, C-language audio API for 2D and 3D audio. It provides access to features such as 3D positional audio and MIDI playback. It is made for developers in the mobile and gaming ...
int fill_len = (len > audio_len ? audio_len : len); // 将音频数据混合到缓冲区 SDL_MixAudio(stream, audio_pos, fill_len, SDL_MIX_MAXVOLUME); audio_pos += fill_len; audio_len -= fill_len; len -= fill_len; stream += fill_len; if (audio_len == 0) { // 这里要延迟一会儿...
所有模块都使用Mix_OpenAudio()和Mix_CloseAudio()对声音进行init/deinit,并且一起工作得很好。唯一的例外是电影模块,我用SDL_FFMpeg来放映一部电影。这个模块迫使我使用SDL_OpenAudio()代替。 SDL_OpenAudio第一次失败,错误是“音频设备已经打开”,但第二次工作。一旦我运行了电影模块 浏览3提问于2011-01-04得票数...
int fill_len = (len > audio_len ? audio_len : len); // 将音频数据混合到缓冲区 SDL_MixAudio(stream, audio_pos, fill_len, SDL_MIX_MAXVOLUME); audio_pos += fill_len; audio_len -= fill_len; len -= fill_len; stream += fill_len; if (audio_len == 0) { // 这里要延迟一会儿...
Hello, I am not able to mix two mono pcm ulaw files using FFmpegFrameFilter class with the "amix" option. The output file size is much smaller (78 bytes) as comapred to input (225 KB & 225 KB) and the does not play at all. Intially I cre...
#8复用音视频文件 FFmpeg还为您提供了多路复用/多路分解音频和视频文件的功能。以下命令将两个音频和视频文件合并为一个。ffmpeg -i audio.mp3 -i video.avi video_audio_mix.mpg 上面的命令将多路复用标题为“dio”的mp3音频文件和标题为“video”的avi视频文件。生成的多路复用文件将为.mpg格式。
{ ns = av_audio_fifo_size(s->fifos[i]); if (ns < nb_samples) { if (!(s->input_state[i] & INPUT_EOF)) return 0; nb_samples = ns; } } } s->next_pts = frame_list_next_pts(s->frame_list); } else { nb_samples = INT_MAX; for (i = 1; i < s->nb_inputs; i...
SwrContext* audio_convert_ctx = NULL; audio_convert_ctx = swr_alloc(); 1. 2. 【第二】上下文结构体参数设置 参数设置有两种方式: 【方法一】:采用AVOptions的api,举例如下 av_opt_set_channel_layout(audio_convert_ctx, "in_channel_layout", AV_CH_LAYOUT_5POINT1, 0); ...
打开Android Studio,新建项目FFmpegAudioPlayer,添加C++支持 3.2 配置FFmpeg动态库 在src下的main文件中创建jniLibs文件夹,在jniLibs创建armeabi文件夹,将ffmpeg下android/arm/lib/目录下的so文件(libavcodec-57.so/libavfilter-6.so/libavformat-57.so/libavutil-55.so/libswresample-2.so/libswscale-4.so)拷贝至...
ret = hybase_proc_mix(s->pcm_inputs, nb_valid, mixed_buf, mixed_buf_size, base_audio)...