ffmpeg -i quantum_infomation.mp4 -c:v libvpx-vp9 -b:v 512K -c:a libvorbis quantum_infomation.webm -- Justin Wong On Sun, Jun 12, 2016, at 18:23, Wang Kang wrote: > VP9是怎么编码的呢？求教程 > > 看了一下ffmpeg的那个static build里面目前只有VP9的解码器.. > > $ ffmpeg -codecs |grep vp > ffmpeg version 3.0.2 Copyright (c) 2000-2016 the FFmpeg developers > built with Apple LLVM version 7.3.0 (clang-703.0.31) > configuration: --prefix=/usr/local/Cellar/ffmpeg/3.0.2 --enable-shared > --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded- > tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= > --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid > --enable-ffplay --enable-vda > libavutil 55. 17.103 / 55. 17.103 > libavcodec 57. 24.102 / 57. 24.102 > libavformat 57. 25.100 / 57. 25.100 > libavdevice 57. 0.101 / 57. 0.101 > libavfilter 6. 31.100 / 6. 31.100 > libavresample 3. 0. 0 / 3. 0. 0 > libswscale 4. 0.100 / 4. 0.100 > libswresample 2. 0.101 / 2. 0.101 > libpostproc 54. 0.100 / 54. 0.100 > D.V.L. vp3 On2 VP3 > D.V.L. vp5 On2 VP5 > D.V.L. vp6 On2 VP6 > D.V.L. vp6a On2 VP6 (Flash version, with alpha > channel) > D.V.L. vp6f On2 VP6 (Flash version) > D.V.L. vp7 On2 VP7 > D.V.L. vp8 On2 VP8 > D.V.L. vp9 Google VP9 > DEA.LS wavpack WavPack > D.S... vplayer VPlayer subtitle > > -- > Wang Kang > [email protected] > > > On Sun, Jun 12, 2016, at 18:20, Justin Wong wrote: >> 原来如此，我看了下是 2000kbps 的 mp4，昨天录的时候应该是 1000kbps 的 >> >> -- >> Justin Wong >> >> >> >> On Sun, Jun 12, 2016, at 18:18, [email protected] wrote: >>> 主要是用iMovie重新编码了 >>> >>> Get Outlook for iOS[1] >>> >>> >>> >>> >>> On Sun, Jun 12, 2016 at 5:59 PM +0800, "Justin Wong" <[email protected]> >>> wrote: >>> >>> >>>> 视频已可下载，有 mp4 和 webm 两种格式 >>>> https://mirrors.tuna.tsinghua.edu.cn/tuna/quantum_info/ >>>> >>>> p.s. webm 用了 vp9，基本相同画质的情况下，大小只有 200+M，原 mp4 有 1.2G …… >>>> p.s.2 mp4 是 iphone 拍的，跟手机的硬件编码也有关系 >>>> >>>> -- >>>> Justin Wong >>>> >>>> >>>> >>>> On Mon, Jun 6, 2016, at 21:53, yi lu wrote: >>>>> 哇 >>>>> >>>>> 2016-06-06 21:37 GMT+08:00 Justin Wong <[email protected]>: >>>>>> Hi Tuars, >>>>>> >>>>>> 本周的金枪鱼之夜已经确定，物理系吕铭同学做完毕设很有收获，中央决定让吕铭同学给大家科普一下量子计算。 >>>>>> >>>>>> 时间：6月11日（周六）晚 19:00 ~ 21:00 >>>>>> 地点：三教 1301 >>>>>> >>>>>> p.s. 明天就要高考啦，@gaoyichuan @harry_chen @其他订阅这个列表的考生，我们在TUNA等你来～ >>>>>> >>>>>> 以上， >>>>>> 团长 >>>>>> -- >>>>>> Justin Wong >>>>>> >>>>>> -- >>>>>> >>>>>> --- >>>>>> You received this message because you are subscribed to the >>>>>> Google Groups "TUNA 主邮件列表" group. To unsubscribe from this group >>>>>> and stop receiving emails from it, send an email to tuna- >>>>>> [email protected][2]. To post to this group, >>>>>> send email to [email protected]. For more options, >>>>>> visit https://groups.google.com/d/optout. >>>>> >>>>> >>>>> -- >>>>> >>>>> --- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "TUNA 主邮件列表" group. >>>>> To unsubscribe from this group and stop receiving emails from it, >>>>> send an email to [email protected]. >>>>> To post to this group, send email to tuna- >>>>> [email protected]. >>>>> For more options, visit https://groups.google.com/d/optout. >>>> >>>> >>>> -- >>>> >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "TUNA 主邮件列表" group. >>>> To unsubscribe from this group and stop receiving emails from it, >>>> send an email to [email protected]. >>>> To post to this group, send email to [email protected]. >>>> For more options, visit https://groups.google.com/d/optout. >>> >>> -- >>> >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "TUNA 主邮件列表" group. >>> To unsubscribe from this group and stop receiving emails from it, >>> send an email to [email protected]. >>> To post to this group, send email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >> >> >> -- >> >> --- >> You received this message because you are subscribed to the Google >> Groups "TUNA 主邮件列表" group. >> To unsubscribe from this group and stop receiving emails from it, >> send an email to [email protected]. >> To post to this group, send email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. > > > -- > > --- > You received this message because you are subscribed to the Google > Groups "TUNA 主邮件列表" group. > To unsubscribe from this group and stop receiving emails from it, > send an email to [email protected]. > To post to this group, send email to [email protected]. > For more options, visit https://groups.google.com/d/optout.
Links: 1. https://aka.ms/o0ukef 2. mailto:tuna-general%[email protected] -- --- You received this message because you are subscribed to the Google Groups "TUNA 主邮件列表" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. For more options, visit https://groups.google.com/d/optout.
