奇怪的 chrome 视频解码问题

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貌似 chrome 解码.webm格式的视频是软解，cpu 飙高风扇狂转，而解码.mp4却是硬件解码。二者视频 codec 一致，只是封装后缀不一样。。。

Input #0, matroska,webm, from 'a6f3f362-14c3-4dd-8801-d69e8547a529.webm': Metadata: encoder : libwebm-0.2.1.0 creation_time : 2024-09-25T18:16:52.000000Z Duration: 00:00:01.58, start: -0.007000, bitrate: 331 kb/s Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv), 3200x300, SAR 1:1 DAR 32:3, 12 fps, 12 tbr, 1k tbn (default) Metadata: alpha_mode : 1 Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp (default) 

转下面.mp4硬解

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'a.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2mp41 encoder : Lavf61.3.100 Duration: 00:00:01.60, start: 0.000000, bitrate: 227 kb/s Stream #0:0[0x1](eng): Video: vp9 (Profile 0) (vp09 / 0x39307076), yuv420p(tv), 3200x300, 220 kb/s, SAR 1:1 DAR 32:3, 12 fps, 12 tbr, 16k tbn (default) Metadata: handler_name : VideoHandler vendor_id : [0][0][0][0] Stream #0:1[0x2](eng): Audio: opus (Opus / 0x7375704F), 48000 Hz, stereo, fltp, 1 kb/s (default) Metadata: handler_name : SoundHandler vendor_id : [0][0][0][0]