Hello,
I'm trying to decode effectively audio in an .avi video file with
decode_audio4, etc.
I succeed as long as the decoded frames are stereo, but when I bump into
avi files which have 5.1 channels I get weird audio reproduction.
I have so far tried to resample (swr_convert) the decoded frames, but
with no success.
av_opt_set_int(swr_ctx, "in_channel_layout", src_ch_layout, 0);
av_opt_set_int(swr_ctx, "in_sample_rate", src_rate, 0);
av_opt_set_sample_fmt(swr_ctx, "in_sample_fmt", src_sample_fmt, 0);
av_opt_set_int(swr_ctx, "in_channel_count", dec_fr->channels, 0);
av_opt_set_int(swr_ctx, "out_channel_layout", dst_ch_layout, 0);
av_opt_set_int(swr_ctx, "out_sample_rate", dst_rate, 0);
av_opt_set_sample_fmt(swr_ctx, "out_sample_fmt", dst_sample_fmt, 0);
av_opt_set_int(swr_ctx, "out_channel_count", 2, 0);
Here, I would like to ask a few questions:
1) is the "in_channel_layout" the layout of the decoded frame before it
is resampled?
2) what is it that swr_convert really does?
Thanks for any help to clarify my ideas
Luigi
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