Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated
AVStream *out_stream = avformat_new_stream(ofmt_ctx, pCodecH264);
if (!out_stream) {
printf("Failed allocating output stream\n");
ret = AVERROR_UNKNOWN;
return NULL;
}
解决方法：
out_stream->time_base = rate;
AVRational rate;
rate.num = 1;
rate.den = 25;