Hi, I met a problem when doing seek in a mpeg file (MPEG2 encoded MPEG-PS video).
After the file is opened using avformat_open_input, seems the index_entries of video stream is populated with incorrect values (the comment says these index_entries are only used if format does not support seeking natively). I can directly call av_seek_frame and it succeeded on this file. But I don't understand if those index_entries are not valid, why they get populated when file is opend So I'd like to know if there's a way to judge if the index_entries are valid, or if there's a list telling me what format natively doesn't support seek (So if I know which format supports direct seek, I can ignore index_entries and seek directly) the index_entries of that mpeg files has following timestamps: 00:00:19.267 MAIN entry[0].time = 21600 00:00:20.109 MAIN entry[1].time = 57600 00:00:20.842 MAIN entry[2].time = 100800 00:00:20.842 MAIN entry[3].time = 144000 00:00:20.842 MAIN entry[4].time = 187200 00:00:20.842 MAIN entry[5].time = 230400 00:00:20.842 MAIN entry[6].time = 273600 00:00:20.842 MAIN entry[7].time = 316800 00:00:20.842 MAIN entry[8].time = 360000 00:00:20.842 MAIN entry[9].time = 403200 00:00:20.842 MAIN entry[10].time = 446400 00:00:20.842 MAIN entry[11].time = 489600 00:00:20.842 MAIN entry[12].time = 532800 00:00:20.842 MAIN entry[13].time = 576000 00:00:20.842 MAIN entry[14].time = 619200 00:00:20.842 MAIN entry[15].time = 662400 00:00:20.842 MAIN entry[16].time = 705600 00:00:20.842 MAIN entry[17].time = 285264000 the last timestamp is quite close to the end of video so the first 17 are quite close to the beginning. So if I seek based on these indexes, it always goes to the the very beginning first. Thanks!
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