我正在尝试使用ffmpeg转码360视频(目前在Gear VR上播放),主要是为了降低比特率(这是一项要求).但输出文件似乎删除了具有360视频元数据的"Side Data".
输入文件ffprobe结果(注意Side Data部分):
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41
creation_time : 2016-10-28T10:41:42.000000Z
Duration: 00:02:09.56, start: 0.000000, bitrate: 20116 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 2560x1280, 19797 kb/s, 50 fps, 50 tbr, 50k tbn, 100 tbc (default)
Metadata:
creation_time : 2016-10-28T10:41:42.000000Z
handler_name : Alias Data Handler
encoder : AVC Coding
Side data:
spherical: equirectangular (0.000000/0.000000/0.000000)
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, …