Hi all,
I have an application that encodes mpeg4 video. The encoder was an
adaptation of the decoding_encoding_8c-example
<https://www.ffmpeg.org/doxygen/2.4/decoding_encoding_8c-example.html>.
It works well, but bitrate fluctuates without much control. Currently,
these are my AVCodecContext settings:
c->bit_rate = 5000000;
c->width = this->m_width;
c->height = this->m_height;
c->time_base.den = 25;
c->time_base.num = 1;
c->gop_size = 0;
c->max_b_frames=0;
c->pix_fmt = this->pix_fmt;
av_opt_set(c->priv_data, "preset", "ultrafast", 0);
av_opt_set(c->priv_data, "tune", "zerolatency", 0);
And I get up to 70Mbps depending on the image being encoded. I have also
tried to set these parameters:
c->bit_rate = 12e06;
c->rc_min_rate = c->bit_rate;
c->rc_max_rate = c->bit_rate;
c->rc_buffer_size = c->bit_rate * 30;
And it does limit bandwidth, but after a couple minutes of encoding I
get the error:
[error] ffmpeg error evaluating rc_eq (null)
My guess is that I'm missing some parameters. I don't quite understand
what the rc_buffer_size value should be either.
Cheers!
--
Sergio Basurco,
Coherent Synchro
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