[FFmpeg-trac] #7457(ffplay:new): FFplay slow youtube streaming

FFmpeg trac at avcodec.org
Wed Sep 26 02:43:46 EEST 2018


#7457: FFplay slow youtube streaming
----------------------------------+--------------------------------------
             Reporter:  chenrios  |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  ffplay    |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
----------------------------------+--------------------------------------
 Summary of the bug:
 FFplay is downloading the video at around 21.8Mbps which is not sufficient
 at 4k60fps and causes buffering. Chrome / Firefox buffers the video
 perfectly fine on my 300Mbps line.

 How to reproduce:
 1. get youtube video which has 4k 60fps format available like e.g.
 youtube-dl -f 315 -g https://youtu.be/imZYzSOV27g
 2. pass output URL to ffplay
 3. after ~30seconds video starts to buffer
 {{{
 % ffplay version N-91961-g5109c38162 Copyright (c) 2003-2018 the FFmpeg
 developers
   built with gcc 8.2.1 (GCC) 20180813
   configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
 fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-
 libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-
 amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus
 --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora
 --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp
 --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg
 --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-
 libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex
 --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-
 ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec
 --enable-dxva2 --enable-avisynth
   libavutil      56. 19.101 / 56. 19.101
   libavcodec     58. 30.100 / 58. 30.100
   libavformat    58. 18.101 / 58. 18.101
   libavdevice    58.  4.103 / 58.  4.103
   libavfilter     7. 32.100 /  7. 32.100
   libswscale      5.  2.100 /  5.  2.100
   libswresample   3.  2.100 /  3.  2.100
   libpostproc    55.  2.100 / 55.  2.100
 Input #0, matroska,webm, from 'https://r2---sn-
 2gb7sn7k.googlevideo.com/videoplayback?[redacted]':
   Metadata:
     encoder         : google/video-file
   Duration: 00:10:06.62, start: 0.000000, bitrate: 22188 kb/s
     Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709),
 3840x2160, SAR 1:1 DAR 16:9, 59.94 fps, 59.94 tbr, 1k tbn, 1k tbc
 (default)
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7457>
FFmpeg <https://ffmpeg.org>
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