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[libav-user] Encoding PCM audio with avcodec_encode_audio
https://libav-user.ffmpeg.narkive.com/bb4elg6G/encoding-pcm-audio-with-avcodec-encode-audio
pkt.size= avcodec_encode_audio(c, audio_outbuf, audio_outbuf_size, samples); But the produced mp3 files are playing too quickly - for example after 27 seconds of capturing only 1 second long mp3 file is recorded.
avcodec_encode_audio2() error -22 · Issue #1673 · …
https://github.com/bytedeco/javacv/issues/1673
private final static String CLASS_LABEL = "RecordActivity"; private final static String LOG_TAG = CLASS_LABEL; /* The number of seconds in the continuous record loop (or 0 to disable loop). */ final int RECORD_LENGTH = 10; /* layout setting */ private final int bg_screen_bx = 232; private final int bg_screen_by = 128; private final int bg_screen_width = 700; private final …
how to encode raw audio into mp2 or mp3 formats - C / C++
https://bytes.com/topic/c/answers/693975-how-encode-raw-audio-into-mp2-mp3-formats
This is presumable what it thinks it can fit into a single audio frame from the MPEG2 specification part 3. The outbuf is the buffer where the encode MPEG2 audio data is written, its size appears to be arbitrary but large. When avcodec_encode_audio is called it returns the amount of data it has written into outbuf so that it can be saved to disk.
c - Encode audio to aac with libavcodec - Stack Overflow
https://stackoverflow.com/questions/2410459/encode-audio-to-aac-with-libavcodec
I'm using libavcodec (latest git as of 3/3/10) to encode raw pcm to aac (libfaac support enabled). I do this by calling avcodec_encode_audio repeatedly with codec_context->frame_size samples each time. The first four calls return successfully, but the fifth call never returns. When I use gdb to break, the stack is corrupt.
Why does avcodec_fill_audio_frame return -22 when only ...
https://www.examplefiles.net/cs/1596763
In some cases this depends on the codec (e.g. mp3 frame size is constant), but in other cases it can be variable. It should still be constant in an encoding for most encoders. It looks like your value is just whatever the default was and mulaw has no built-in constant, so you can just specify a different frame_size value before calling avcodec_open2() and you should be OK.
error -22: Could not encode audio packet. · Issue #1294 ...
https://github.com/bytedeco/javacv/issues/1294
recorder.setFormat("mp3"); recorder.setFrameRate(grabber.getFrameRate()); recorder.setAudioCodec(avcodec.AV_CODEC_ID_MP3); recorder.setSampleRate(grabber.getSampleRate()); //doAudio, doVideo, doProcessing, keyFrames frame = grabber.grabFrame(true, false, true, false); recorder.startUnsafe(); …
FFmpeg encode_audio.c示例 - 简书
https://www.jianshu.com/p/2fa4fad2bae1
encode_audio.c 1、编译示例程序 打开msys，进入目录 生成可执行文件encode_audio.exe 2、运行示例程序 生成音频文件
C++ (Cpp) avcodec_decode_audio4 Examples - HotExamples
https://cpp.hotexamples.com/examples/-/-/avcodec_decode_audio4/cpp-avcodec_decode_audio4-function-examples.html
C++ (Cpp) avcodec_decode_audio4 - 30 examples found. These are the top rated real world C++ (Cpp) examples of avcodec_decode_audio4 extracted from open source projects. You can rate examples to help us improve the quality of examples.
Libavcodec tutorial: decode virtually any audio file in C ...
https://rodic.fr/blog/libavcodec-tutorial-decode-audio-file/
The code. The function decode_audio_file takes 4 parameters: sample_rate: the desired sample rate for the output data. data: a pointer to a pointer to double precision values, where the extracted data will be stored. size: a pointer to the length of the final extracted values array (number of samples) It returns 0 upon success, and -1 in case ...
MP3 Audio Encoder - Win32 apps | Microsoft Docs
https://docs.microsoft.com/en-us/windows/win32/medfound/mp3-audio-encoder
The Microsoft Media Foundation MP3 audio encoder is a Media Foundation Transform (MFT) that encodes MPEG-1 layer 3 (MP3) audio. Class Identifier. The class identifier (CLSID) of the MP3 encoder is CLSID_MP3ACMCodecWrapper, defined in the header file wmcodecdsp.h. Media Types. The MP3 encoder supports the following media types.
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