[Libav-user] problem while using swresample library
Rafi Fisher
rafi.fisher at wywy.com
Mon Dec 3 16:52:57 CET 2012
hello
i'm using *swresample lib*. my code is used to convert mp2 or mp4 into
wav file.
the code fragment :
.......
SwrContext *swr = swr_alloc();
ret = av_opt_set_int(swr, "in_channel_layout", AV_CH_LAYOUT_STEREO, 0);
ret = av_opt_set_int(swr, "out_channel_layout", AV_CH_LAYOUT_MONO,
0);
ret = av_opt_set_int(swr, "in_sample_rate", IN_SAMPLE_RATE, 0);
ret = av_opt_set_int(swr, "out_sample_rate", OUT_SAMPLE_RATE, 0);
ret = av_opt_set_int(swr, "in_sample_fmt", AV_SAMPLE_FMT_S16, 0);
ret = av_opt_set_int(swr, "out_sample_fmt", AV_SAMPLE_FMT_S16, 0);
ret = swr_init(swr);
.......
out_samples = swr_convert(swr, output, out_samples,(const uint8_t **)
(inframe->data), in_samples);
if out_channel_layout = AV_CH_LAYOUT_ STEREO resampling works fine
if out_channel_layout = AV_CH_LAYOUT_MONO & other set options remain
same it fails that is:
the swr_convert fails that is somwhere inside the code of this function
there is a call to* exit*
which is problematic by itself (exit a program from av. library)
instead of returning some error code.
help will be appreciated thanks rafi
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