Recherche avancée

Sur d’autres sites (6846)

• Why do I use the header file/library + ffplay.c download from the official website of ffmpeg to make the player worse than the official ffplay ?

  15 juillet 2020, par fredirty2017
  


  1. I am use win10 system with a "http_url_mp4" in hand, the MIME of this file is :
video/mp4 ; codecs="mp4a.40.2,avc1.640020" ; profiles="isom,mp41,mp42".

     


  


  2. I downloaded the header files, libraries, dlls, source code from https://ffmpeg.zeranoe.com/builds/ ,then :

     


  


  3. Run offical "ffplay http_url_mp4", audio and video viewing is normal ;

     


  


  4. I used VS2017 (the project has no special settings) to compile and link the fftools/ffplay.c，fftools/cmdutil.c and the included header files(libavcodec/libavutil and so on), libraries(such as avcodec.lib, avdevicelib, etc.), dlls(avcodec-58.dll / avformat-58.dll...), then run "myffplay http_url_mp4", The playback is stuttering, debugging found av_read_frame relative The processing cost more time, the calling frequency will be lower.

     


  


  5. i found config.h only line '#define FFMPEG_CONFIGURATION "—enable-gpl"', but offical ffplay cmdline shows :
'—disable-static —enable-shared —enable-gpl —enable-version3 —enable-cuda —enable-cuvid —enable-d3d11va —enable-dxva2 —enable-libmfx —enable-nvenc —enable-avisynth —enable-bzlib —enable-fontconfig —enable-frei0r —enable-gnutls —enable-iconv —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —enable-libfreetype —enable-libgme —enable-libgsm —enable-libilbc —enable-libmodplug —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenh264 —enable-libopenjpeg —enable-libopus —enable-librtmp —enable-libsnappy —enable-libsoxr —enable-libspeex —enable-libtheora —enable-libtwolame —enable-libvidstab —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxavs —enable-libxvid —enable-libzimg —enable-lzma —enable-zlib',

     


  


  6. Does the VS project need special settings or other codes ?

     


  


  


• download compressed video from m3u8 link

  6 juin 2020, par alsaibi

  i'm making a python script to download videos from a site

  



  it's working perfectly but some videos are m3u8

  



  the links are something like this

  



  https:\/\/dl.v.vrv.co\/evs\/5e915ac2127515861ea2563ca4e3eb25\/assets\/jpy1j4wghs4eepk_,1605371.mp4,1605379.mp4,1605363.mp4,1605355.mp4,1605347.mp4,.urlset\/master.m3u8?Policy=eyJTdGF0ZW1lbnQiOlt7IlJlc291cmNlIjoiaHR0cCo6Ly9kbC52LnZydi5jby9ldnMvNWU5MTVhYzIxMjc1MTU4NjFlYTI1NjNjYTRlM2ViMjUvYXNzZXRzL2pweTFqNHdnaHM0ZWVwa18sMTYwNTM3MS5tcDQsMTYwNTM3OS5tcDQsMTYwNTM2My5tcDQsMTYwNTM1NS5tcDQsMTYwNTM0Ny5tcDQsLnVybHNldC9tYXN0ZXIubTN1OCIsIkNvbmRpdGlvbiI6eyJEYXRlTGVzc1RoYW4iOnsiQVdTOkVwb2NoVGltZSI6MTU5MTU1ODg4Nn19fV19&Signature=S7bDaUsOAplp437a-2hBIiED-jgwGCHups-cCHFK0etbVwn5O0Lx09~yiPvOnL9kae3AHFbPnlduxwotDDzKUMy01Swbudjz~HLwR26Lp1fb1vKAhZDgM1LJPkBFuQSbCYfN4cKG2aihTfbxNy3S63sUdQJouVjxwgkIj069kIjTmj7GsMfFgqrvYZja~RUOvF7n4evA0iisKbzTio4gB3gGYBhqOe~rh1rSbqGsO92U1AiflVGETpgo~z0p89agQGK4LHamKEWQUF2vITqYA2WXKYV1qNNg5JJ3ZDJUp3L3qE2zCBige1qw9UYtxr7jvg-PhZh4Esr07xS5G7UfQA__&Key-Pair-Id=DLVR


  



  i'm trying to download mp4 or mkv file to watch the video offline

  



  i tried using ffmpeg and youtube-dl

  



  they only work after changing \/ in the link to //

  



  ffmpeg command i used ffmpeg -i "Link" -bsf:a aac_adtstoasc -vcodec copy -c copy -crf 50 file.mp4

  



  that's not the problem

  



  they download the full raw video file which is around 1.5GB

  



  but in the site watching the video take maximum 250MB at highest quality

  



  and the download is really slow for some reason

  



  it take almost 1 hour to download 1 video

  



  and at the end video don't open after finish downloading

  



  vlc say it's corrupted

  



  isn't there is a way to convert the link to direct link to compressed file link ?

  



  the site take 200MB to watch the video and loading the video is fast but downloading it from the link above take 1.5GB and it's soo slow

  


• Download highest quality audio from YouTube using youtube-dl

  3 juin 2020, par darvast

  I'm using this command :

  



  youtube-dl -f bestaudio --extract-audio --audio-format "opus" --add-metadata -o "%(playlist_index)s-%(title)s.%(ext)s" "https://www.youtube.com/playlist?list=OLAK5uy_lWRq5MhPNthDDe1nYXtlekDA40wtrpKE0"


  



  Here's the available streams :

  



  [info] Available formats for 6t1dErgAglk:
format code  extension  resolution note
249          webm       audio only tiny   58k , opus @ 50k (48000Hz), 416.34KiB
250          webm       audio only tiny   72k , opus @ 70k (48000Hz), 516.52KiB
140          m4a        audio only tiny  130k , m4a_dash container, mp4a.40.2@128k (44100Hz), 1.06MiB
251          webm       audio only tiny  131k , opus @160k (48000Hz), 923.79KiB
278          webm       140x144    144p   32k , webm container, vp9, 25fps, video only, 159.74KiB
160          mp4        140x144    144p   54k , avc1.4d400b, 25fps, video only, 278.62KiB
242          webm       232x240    240p   71k , vp9, 25fps, video only, 321.29KiB
134          mp4        350x360    360p   96k , avc1.4d4015, 25fps, video only, 303.75KiB
133          mp4        232x240    240p  124k , avc1.4d400c, 25fps, video only, 651.46KiB
243          webm       350x360    360p  126k , vp9, 25fps, video only, 545.77KiB
135          mp4        466x480    360p  174k , avc1.4d401e, 25fps, video only, 534.97KiB
244          webm       466x480    360p  215k , vp9, 25fps, video only, 1003.20KiB
136          mp4        698x720    720p  305k , avc1.4d401f, 25fps, video only, 942.76KiB
137          mp4        1048x1080  1080p  494k , avc1.640020, 25fps, video only, 1.49MiB
247          webm       698x720    720p  593k , vp9, 25fps, video only, 1.97MiB
248          webm       1048x1080  1080p  768k , vp9, 25fps, video only, 3.81MiB
18           mp4        350x360    360p  213k , avc1.42001E, 25fps, mp4a.40.2@ 96k (44100Hz), 1.73MiB
22           mp4        698x720    720p  242k , avc1.64001F, 25fps, mp4a.40.2@192k (44100Hz) (best)


  



  When I run the above command it seems to be converting m4a to opus : https://prnt.sc/st2l8u

  



  I'm wondering why it's doing that instead of getting it from the webm container ?