-
- memset(ap, 0, sizeof(*ap));
- ap->prealloced_context = 1;
- ap->sample_rate = audio_sample_rate;
- ap->channels = audio_channels;
- ap->time_base.den = frame_rate.num;
- ap->time_base.num = frame_rate.den;
- ap->width = frame_width;
- ap->height = frame_height;
- ap->pix_fmt = frame_pix_fmt;
- // ap->sample_fmt = audio_sample_fmt; //FIXME:not implemented in libavformat
- ap->channel = video_channel;
- ap->standard = video_standard;
-
- set_context_opts(ic, avformat_opts, AV_OPT_FLAG_DECODING_PARAM, NULL);
+ if (audio_sample_rate) {
+ snprintf(buf, sizeof(buf), "%d", audio_sample_rate);
+ av_dict_set(&format_opts, "sample_rate", buf, 0);
+ }
+ if (audio_channels) {
+ snprintf(buf, sizeof(buf), "%d", audio_channels);
+ av_dict_set(&format_opts, "channels", buf, 0);
+ }
+ if (frame_rate.num) {
+ snprintf(buf, sizeof(buf), "%d/%d", frame_rate.num, frame_rate.den);
+ av_dict_set(&format_opts, "framerate", buf, 0);
+ }
+ if (frame_width && frame_height) {
+ snprintf(buf, sizeof(buf), "%dx%d", frame_width, frame_height);
+ av_dict_set(&format_opts, "video_size", buf, 0);
+ }
+ if (frame_pix_fmt != PIX_FMT_NONE)
+ av_dict_set(&format_opts, "pixel_format", av_get_pix_fmt_name(frame_pix_fmt), 0);