I managed to trace this down to av_frame_get_buffer returning -22. Here's the code that I tried:
AVFrame *audioFrame = av_frame_alloc(); audioFrame->channels = 2; audioFrame->channel_layout = av_get_default_channel_layout(2); audioFrame->sample_rate = 44100; audioFrame->nb_samples = buffer->mBuffers[0].mDataByteSize/ sizeof(Float32) * 44100; audioFrame->pts = audioFrame->nb_samples; av_frame_get_buffer(audioFrame, 0); <--- returns -22 audioFrame->extended_data[0] = buffer->mBuffers[0].mData; audioFrame->extended_data[1] = buffer->mBuffers[1].mData; audioFrame->linesize[0] = buffer->mBuffers[0].mDataByteSize; AVFrame *otherFrame = av_frame_alloc(); int result2 = av_frame_ref(otherFrame, audioFrame); <--- returns -22 int result = av_buffersrc_write_frame(self.bufferContext, audioFrame); Why would av_frame_get_buffer return -22? Am I not supposed to call it? What about write frame? > On Nov 27, 2017, at 7:19 PM, Ronak Patel <[email protected]> > wrote: > > Hi Paul, > > Do you mind pointing me to the relevant documentation? > > I tried setting up an AVFrame instance with the sample rate, channel layout > and data but the calls to av_frame_ref are failing with -22 errors. I’m > looking for any sample code that shows how to properly initialize an AVFrame > from an AudioBufferList. > > Thanks > > Ronak > > Sent from my iPhone > >> On Nov 26, 2017, at 2:17 PM, Paul B Mahol <[email protected]> wrote: >> >>> On 11/26/17, Ronak <[email protected]> wrote: >>> Hi, >>> >>> I'm trying to build a graphic equalizer using the ffmpeg library for iOS, >>> wrapping the AVFilter library in an AUAudioUnit. >>> >>> I'm having trouble figuring out how to convert an AudioBufferList's data to >>> an AVFilter and back. The input buffers are in stereo, so I'm also unsure >>> how to pass in both data arrays. >>> >>> Does anyone know how to do this? >> >> Have you read already available documentation? >> >> AVFrame stores samples for packed format into AVFrame->data[0]. >> And planar format into AVFrame->extended_data[ X ], where X is channel >> number. >> _______________________________________________ >> Libav-user mailing list >> [email protected] >> http://ffmpeg.org/mailman/listinfo/libav-user > > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user
_______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
