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• Revision 663916cea7: SVC improvements These changes were originally made in the Stratacaster team-re

  12 October 2013, by Ivan Maltz

  Changed Paths:
   Modify /libs.mk

  
   Add /test/svc_test.cc

  
   Modify /test/test.mk

  
   Modify /vp9/common/vp9_onyx.h

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/vp9_cx_iface.c

  
   Modify /vp9_spatial_scalable_encoder.c

  
   Modify /vpx/exports_enc

  
   Add /vpx/src/svc_encodeframe.c

  
   Add /vpx/svc_context.h

  
   Modify /vpx/vp8cx.h

  
   Modify /vpx/vpx_codec.mk

  
  
  SVC improvements

  These changes were originally made in the Stratacaster team-review repository

  commit e114bffcd82ad74c3696ec58e13c0ac895d6c82d
  Author: Charles 'Buck' Krasic <ckrasic@google.com>
  Date: Mon Oct 14 16:52:13 2013 -0700

  Make dummy frame handling a bit more explicit, fixing bug
  with single layer encodes.

  Squashed commit of the following:

  commit 1ebbfd976c0fadb02bf1ea562a2d0e3f0206daad
  Merge: ac468dd 54e88b7
  Author: Ivan Maltz <ivanmaltz@google.com>
  Date: Fri Oct 11 17:29:58 2013 -0700

  Move SVC code from vp9_spatial_scalable_encoder to libvpx module accessible
  from ffmpeg

  commit 54e88b78b160becc9569fc3c6cb6b0a8c95dc357
  Author: Ivan Maltz <ivanmaltz@google.com>
  Date: Tue Oct 8 09:08:40 2013 -0700

  common svc encoding code for sample app and ffmpeg

  added svc_encodeframe.c, svc_context.h, svc_test.cc

  vp9_spatial_scalable_encoder uses vpx_svc_encode

  commit 5616ec8e2e3d3e8d277333d8a9242f6c70151162
  Merge: 4528014 e29137d
  Author: Ivan Maltz <ivanmaltz@google.com>
  Date: Tue Oct 8 08:47:58 2013 -0700

  Merge branch 'master' into stratacaster

  commit 45280148450b1f3d61e390df8aadedf85cd5bce1
  Merge: bb2b675 1ab60f7
  Author: Sujeevan Rajayogam <sujee@google.com>
  Date: Fri Oct 4 10:22:31 2013 -0700

  Merge branch 'master' into stratacaster

  commit bb2b675e595dc9bfc8551e963edf56800c3aea61
  Author: Sujeevan Rajayogam <sujee@google.com>
  Date: Wed Oct 2 12:37:26 2013 -0700

  Track individual frame sizes and psnrs instead of averages.

  commit c6d303b714795c81e7ceb4173967115c9f8ff5b7
  Merge: fa87df9 3583087
  Author: Sujeevan Rajayogam <sujee@google.com>
  Date: Fri Sep 27 10:05:35 2013 -0700

  Merge branch 'master' into stratacaster

  commit fa87df94fba923d9f7aeb8ae20c6e15f777e00b5
  Merge: bf22d71 3c465af
  Author: Sujeevan Rajayogam <sujee@google.com>
  Date: Thu Sep 26 16:10:31 2013 -0700

  Merge branch 'master' into stratacaster

  commit bf22d7144895a82e0c348ac177c8a261b9e2b88e
  Author: Sujeevan Rajayogam <sujee@google.com>
  Date: Thu Sep 26 11:10:34 2013 -0700

  Parameterized quantizer, 16th scalefactors, more logging, enabled single
  layer encodes to generate baseline.

  commit ceffd7e6025b765f9886b5ea0f324248aa37e327
  Author: Sujeevan Rajayogam <sujee@google.com>
  Date: Thu Sep 19 10:04:49 2013 -0700

  - Include new mode for 3 layer I frame with 5 total layers.
  - Refactor svc api.

  Change-Id: Ie4d775e21e006fa597d884c59488dc999478e9b5

• FFMPEG screen grab of windows desktop and then exporting to multiple bandwidth ts and m3u8 files with master playlist

  26 July 2018, by Tank Daniels

  Forgive me as this is my first post as I’m really stuck and need help. My boss needs me to screen capture a windows desktop as input and be able to output at least four outputs dependent on bandwidth. Each output "Stream"(im guessing is the right terminology) must have its own .ts files and .m3u8 files, along with a master m3u8 playlist that lists the four individual m3u8 files.

  Every attempt ive made only produces a master m3u8 file with a single listing of an output stream. (Code enclosed below).

  The end result I need to produce is to have a master m3u8 that can go into a webpage that can stream mp4 hls of the users screen grab and that video output will be changed dependant upon the users bandwidth available. If you can please help me with any advice I will be eternally grateful as I need to impress my new boss in my new job, and I’ve been working on this for ages now with no joy.

  Example:
  This is what I need it to look like.

  What the M3U8 needs to look like

  Example:
  This is what it actually looks like now.

  What the current M3U8 actually looks like when i run my code

  Below is the code I am currently using. Please help.

  ffmpeg -f dshow -i video="UScreenCapture":audio="virtual-audio-capturer" -master_pl_name master.m3u8 -master_pl_publish_rate 30 -tune fastdecode -vf scale=w=640:h=360:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod  -b:v 800k -maxrate 856k -bufsize 1200k -b:a 96k -hls_segment_filename 360p_%03d.ts 360p.m3u8 -master_pl_name master.m3u8 -master_pl_publish_rate 30 -vf scale=w=842:h=480:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 1400k -maxrate 1498k -bufsize 2100k -b:a 128k -hls_segment_filename 480p_%03d.ts 480p.m3u8 -master_pl_name master.m3u8 -master_pl_publish_rate 30 -vf scale=w=1280:h=720:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 2800k -maxrate 2996k -bufsize 4200k -b:a 128k -hls_segment_filename 720p_%03d.ts 720p.m3u8 -master_pl_name master.m3u8 -master_pl_publish_rate 30 -vf scale=w=1920:h=1080:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 5000k -maxrate 5350k -bufsize 7500k -b:a 192k -hls_segment_filename 1080p_%03d.ts 1080p.m3u8

  Many Thanks for looking. Chris.

• FFMPEG - How to transcode and segment to multiple bitrates?

  25 July 2014, by ipegasus

  I would like to know how to use FFMPEG to transcode video (Prores codec) and segment videos to multiple bitrates. Is it possible to do it in one command?

  Current working solution with X264:

  1. Encode Videos Using X264.

     /home/ubuntu/bin/ffmpeg -y -i "$video_path" -threads 1 -f mpegts \
     -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile baseline -x264opts "fps=12:keyint=36:bitrate=200" -s 416x234 "$DIR_VIDEO_OUTPUT/$filename"/p1.ts \
     -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile baseline -x264opts "fps=12:keyint=36:bitrate=400" -s 480x270 "$DIR_VIDEO_OUTPUT/$filename"/p2.ts \
     -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile baseline -x264opts "fps=24:keyint=72:bitrate=600" -s 640x360 "$DIR_VIDEO_OUTPUT/$filename"/p3.ts \
     -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile baseline -x264opts "fps=24:keyint=72:bitrate=1200" -s 640x360 "$DIR_VIDEO_OUTPUT/$filename"/p4.ts \
     -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile main -x264opts "fps=24:keyint=72:bitrate=1800" -s 960x540 "$DIR_VIDEO_OUTPUT/$filename"/p5.ts \
     -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile main -x264opts "fps=24:keyint=72:bitrate=2500" -s 960x540 "$DIR_VIDEO_OUTPUT/$filename"/p6.ts \
     -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile main -x264opts "fps=24:keyint=72:bitrate=4500" -s 1280x720 "$DIR_VIDEO_OUTPUT/$filename"/p7.ts

  2. Using an extrenal segmenter

     cd $DIR_VIDEO_OUTPUT/$filename
     mkdir M3U8
     for p in p1 p2 p3 p4 p5 p6 p7; do mkdir $DIR_VIDEO_OUTPUT/$filename/M3U8/$p.seg; (cd M3U8; m3u8-segmenter —input $DIR_VIDEO_OUTPUT/$filename/$p.ts —duration 7 —output-prefix $p.seg/$p —m3u8-file $p.m3u8 —url-prefix ""); done

  3. And finally manualy the individual playlists are joined into one

     echo ’

     EXTM3U

     EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=264000,RESOLUTION=416x234

     p1.m3u8

     EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=464000,RESOLUTION=480x270

     p2.m3u8

     EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=664000,RESOLUTION=640x360

     p3.m3u8

     EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1264000,RESOLUTION=640x360

     p4.m3u8

     EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1864000,RESOLUTION=960x540

     p5.m3u8

     EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2564000,RESOLUTION=960x540

     p6.m3u8

     EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=4564000,RESOLUTION=1280x720

     p7.m3u8’ >> $filename.m3u8
     cd "$DIR_VIDEO_OUTPUT/$filename"/
     sudo rm *.ts