On May 21, 2013, at 9:28 AM, Paul B Mahol <[email protected]> wrote: I don't see any problem, ffmpeg can resample and encode at same time. source sample rate = 16000 source number of samples = 512 destination sample rate = 44100 (using libmp3lame, which sets its frame size to 1152). if you resample prior to encoding, av_encode_audio2 fails with error -22, due to libavcodec's utils.c line 1208 as the result of this check in the preceding line failing: if (frame->nb_samples > avctx->frame_size) { If you do it your suggested way, letting av_encode_audio2 handle both the resampling and encoding, FFmpeg crashes outright.  However, if you use a source sample rate of 44100, or 48000 (no other changes to above data) everything works fine. That's the problem. Brad |
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