Using mlt framework to export flac file play time error

Question

I use the mlt framework to convert aac to flac files,and the code as follows: '''

consumer.set("acodec", "flac");
consumer.set("ab","1030k");
consumer.set("ar",44100);
consumer.set("channels",2);

''' but the time of flac file is wrong.

Answer 1

I solved this problem. add a code follows:

consumer.set("f","matroska");

and output file's time is normal