enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, const char *filename, const char *mime_type, enum AVMediaType type) { if (av_match_name("segment", fmt->name) || av_match_name("ssegment", fmt->name)) { fmt = av_guess_format(NULL, filename, NULL); } if (type == AVMEDIA_TYPE_VIDEO) { enum AVCodecID codec_id = AV_CODEC_ID_NONE; #if CONFIG_IMAGE2_MUXER if (!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")) { codec_id = ff_guess_image2_codec(filename); } #endif if (codec_id == AV_CODEC_ID_NONE) codec_id = fmt->video_codec; return codec_id; } else if (type == AVMEDIA_TYPE_AUDIO) return fmt->audio_codec; else if (type == AVMEDIA_TYPE_SUBTITLE) return fmt->subtitle_codec; else return AV_CODEC_ID_NONE; }