File Type Box ftyp简单的说就是为了标识它的developer是谁,兼容哪些标准等,如“mp42”表示它的major brand是MP4 v2,而“mp42”和“mp41”则表示它的compatible brands是MP4 v2和MP4 v1。 major_brand:推荐兼容性的版本; minor_version:最低兼容性的版本; compatible_brands[]:所有的兼容性的版本。 Movie Box...
major_brand : isom minor_version : 1 compatible_brands: isomavc1 creation_time : 2016-12-17T16:02:05.000000Z album : Yinyuetai artist : yinyuetai.com comment : Yinyuetai-1TR1151 date : 12/18/16 00:02:05 Duration: 00:04:33.51, start: 0.000000, bitrate: 1104 kb/s Stream #0:0(und):...
Stream mapping:Stream #0:0->#0:0(mpeg4(native)->mpeg4(native))Stream #0:1->#0:1(copy)Press[q]to stop,[?]forhelp Output #0,mp4,to'output.mp4':Metadata:major_brand:isom minor_version:1compatible_brands:isom encoder:Lavf58.12.100Stream #0:0(und):Video:mpeg4(mp4v/0x7634706D),y...
init_input()负责找到与文件对应的demuxer。mp4 demuxer的检查标准为:文件包括ftyp box,并且它的major_brand字段是mp4格式之一。 确定demuxer后,调用它的read_header()函数做demux。对于mp4 demuxer是mov_read_header()。 mov_read_header()遍历前面图中的box树,找出stream的信息。这是一个stream列表,但这里的文件只...
major_brand : isom minor_version : 1 compatible_brands: isomavc1 creation_time : 2013-05-03T22:51:07.000000Z Duration: 00:00:46.61, start: 0.000000, bitrate: 3949 kb/s Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 960x400 [SAR 1:1 DAR 12...
major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf60.3.100 Duration: 00:01:10.22, start: 0.000000, bitrate: 1462 kb/s Stream #0:0[0x1](und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(progressive), 1280x720, 1331 kb/s, 25 fps...
major_brand : isom minor_version : 512 compatible_brands: mp41 creation_time : 2024-02-09T06:29:29.000000Z encoder : Bandicam 4.5.0.1587 / GDI / Nvidia NVENC encoder-eng : Bandicam 4.5.0.1587 / GDI / Nvidia NVENC Duration: 00:01:01.78, start: 0.000000, bitrate: 1783 kb/s ...
major_brand:isom minor_version:512compatible_brands: isomiso2mp41 encoder:OurTV Multimedia Platform Duration: 02:53:11.54, start:0.000000, bitrate:6994kb/s Stream#0:0[0x1](und): Video: hevc (Main 10) (hev1 / 0x31766568), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x1608, 6328...
major_brand : mp42 minor_version : 0 compatible_brands: isommp42 creation_time : 2018-02-03 03:10:11 location : +40.0679+116.2994/ location-eng : +40.0679+116.2994/ com.android.version: 7.0 Duration: 00:00:10.06, start: 0.000000, bitrate: 17642 kb/s Stream #1:0(eng): Video: h264...
major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.29.100 Duration: 00:00:20.03, start: 0.000000, bitrate: 58436 kb/s Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 2784x1440, 58518 kb...