> I tried to resample the audio, and it really did the job. Still, one issue > remained: along with the voice, there's a very loud permanent noise (kind of > background crackles/hum).
Well, it seems that the problem wasn't in the parameters to av_audio_resample_init(), but in audio_resample(). In my program it looked like this: unsigned char pcm[AVCODEC_MAX_AUDIO_FRAME_SIZE]; int cb = sizeof(pcm); avcodec_decode_audio3(ctx_.get(), (short *)pcm, &cb, &packet_); // <...> unsigned char pcm2[AVCODEC_MAX_AUDIO_FRAME_SIZE]; audio_resample(resampleCtx, (short *)pcm2, (short *)pcm, cb / 4); I assumed that "cb" is in bytes, and every sample is 4 bytes - thus passed cb/4 to audio_resample(), and this resulted in crackles/hum. If I change it to cb/2 -- everything sounds ok. _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user
