Function encode_write_frame

doc/examples/transcode.c:463–502

}

static int encode_write_frame(unsigned int stream_index, int flush)
{
    StreamContext *stream = &stream_ctx[stream_index];
    FilteringContext *filter = &filter_ctx[stream_index];
    AVFrame *filt_frame = flush ? NULL : filter->filtered_frame;
    AVPacket *enc_pkt = filter->enc_pkt;
    int ret;

    av_log(NULL, AV_LOG_INFO, "Encoding frame\n");
    /* encode filtered frame */
    av_packet_unref(enc_pkt);

    if (filt_frame && filt_frame->pts != AV_NOPTS_VALUE)
        filt_frame->pts = av_rescale_q(filt_frame->pts, filt_frame->time_base,
                                       stream->enc_ctx->time_base);

    ret = avcodec_send_frame(stream->enc_ctx, filt_frame);

    if (ret < 0)
        return ret;

    while (ret >= 0) {
        ret = avcodec_receive_packet(stream->enc_ctx, enc_pkt);

        if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
            return 0;

        /* prepare packet for muxing */
        enc_pkt->stream_index = stream_index;
        av_packet_rescale_ts(enc_pkt,
                             stream->enc_ctx->time_base,
                             ofmt_ctx->streams[stream_index]->time_base);

        av_log(NULL, AV_LOG_DEBUG, "Muxing frame\n");
        /* mux encoded frame */
        ret = av_interleaved_write_frame(ofmt_ctx, enc_pkt);
    }

    return ret;
}

static int filter_encode_write_frame(AVFrame *frame, unsigned int stream_index)
{