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FFmpeg: Encoding
https://ffmpeg.org/doxygen/1.0/group__lavc__encoding.html
On error a negative value is returned, on success zero or the number of bytes used to encode the data read from the input buffer. Definition at line 1270of file utils.c. Encode a frame of audio. Takes input samples from frame and writes the next output packet, if available, to avpkt.
ffmpeg - avcodec_decode_audio3 always returns 0 with aac ...
https://www.generacodice.com/en/articolo/1283482/ffmpeg-avcodec-decode-audio3-always-returns-0-with-aac-decoding-on-android
I am writing an audio decoder based on ffmpeg for android, where I have to decode aac audio, but because of some reason it always returns 0 bytes decoded. Looks like I pass everything right. Can anybody tell me what went wrong in my case.I copied code from ffplay.c. What is the reason avcodec_decode_audio3 function always returns zero?
c - Encode audio to aac with libavcodec - Stack Overflow
https://stackoverflow.com/questions/2410459/encode-audio-to-aac-with-libavcodec
while (*p != AV_SAMPLE_FMT_NONE) { if (*p == sample_fmt) return 1; p++; } return 0; If you observe supported formats, only AV_SAMPLE_FMT_FLTP is supported by AAC codec. You should use swresample (as suggested) to convert in planare float format, or you can do it by hand.
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 …
C++ (Cpp) avcodec_decode_audio4 Examples - HotExamples
https://cpp.hotexamples.com/examples/-/-/avcodec_decode_audio4/cpp-avcodec_decode_audio4-function-examples.html
int audio_decode_frame(VideoState *is) { int len1, data_size = 0; AVPacket *pkt = &is->audio_pkt; for(;;) { while(is->audio_pkt_size > 0) { int got_frame = 0; len1 = avcodec_decode_audio4(is->audio_st->codec, &is->audio_frame, &got_frame, pkt); if(len1 < 0) { /* if error, skip frame */ is->audio_pkt_size = 0; break; } if (got_frame) { /* data_size = av_samples_get_buffer_size ( NULL, …
c++ - FFmpeg audio encoder new encode function - Stack ...
https://stackoverflow.com/questions/35552354/ffmpeg-audio-encoder-new-encode-function
I would like to update an AV Audio encoder using function avcodec_encode_audio (deprecated) to avcodec_encode_audio2, without modifying the structure of existing encoder: outBytes = avcodec_encode_audio (m_handle, dst, sizeBytes, (const short int*)m_samBuf); where: 1) m_handle AVCodecContext. 2) dst, uint8_t * destination buffer.
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