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• ffmpeg video replay with time-sync needs actual recording times

  16 juillet 2018, par navySV

  I am attempting to use ffmpeg to replay multiple video files time-synched, but the zero-based video start time is preventing this.

  I have ffmpeg commands to successfully capture a Microsoft Windows 7 desktop into a video file and replay it with a timestamp value (see below), but the internal timestamp is always starting near zero. How can ffmpeg display the actual time when the video was recorded (and not the time since the start of the video i.e. zero) ?

  For example, if the video started to be recorded at 10:47 am, the ffplay command should display a timestamp similar to "10:47:31" during playback (and not "00:00:31").

  video-capture command :

  ffmpeg -f gdigrab -offset_x 0 -offset_y 0 -video_size 1920x1080 -i desktop -c:v libx264 -preset medium -f mpegts -framerate 24 -y fileA.ts

  playback command :

  ffplay -vf "drawtext=fontfile=/windows/fonts/arial.ttf: text='%{pts\:gmtime\:0\:%H\\\:%M\\\:%S}':box=1:x=(w-tw)/2:y=h-(2*lh)" fileA.ts

  parameters I’ve tried unsuccessfully in the previous commands (including moving these around into different places in the commands) :

  -timestamp now
  
  
  
  -vsync 0
  
  
  
  -copyts

  (every attempt to use -copyts generates errors about "non-strictly-monotonic PTS" or "Non-monotonous DTS in output stream" no matter where I put this parameter)

  -filter_complex "[0:v] setpts=PTS"

  The ultimate goal is to capture four video files (recorded on four different computers and probably having different start times), and then to replay all four in time-sync (which is not possible using only the zero-based start times).

  For example, I’ve been successful at replaying four video files in a 2x2 arrangement, using the following command (I added the -ss parameter to demonstrate I can move the start time of the replay). Unfortunately, they always time-sync to the zero-based first video frame (so they all play from the beginning of the video file). I need the replay to be time-syncing to the actual recorded time for each video. If the four videos were captured starting at times 10:47:00, 10:47:51, 10:48:44, and 10:49:01, I want to be able to replay all of them so that all are displaying the same timestep at the same time (so if one video were displaying 10:48:33, all of the videos would be displaying the same time or a blank screen if that time was unavailable) .

  ffmpeg -ss 00:00:30 -i fileA.ts -i fileB.ts -i fileC.ts -i fileD.ts -filter_complex "[0:v][1:v]hstack[top];[2:v][3:v]hstack[bottom];[top][bottom]vstack[v]" -map "[v]" -timestamp now -f mpegts - | ./ffplay - -x 1920 -y 1080

  Ideally, I would also like to be able to use a real time value (something like "ffplay -ss 10:48:00 ...") to start the video replay at a different position, but worst-case I can write a script to do the needed conversion of the time value.

  My ffmpeg version is a Windows 7 64-bit static build "N-90810-g153e920892" on 2018Apr22 (downloaded from https://www.ffmpeg.org/download.html)

• Download SAMPLE-AES-CTR encrypted m3u8

  16 septembre 2022, par Kadir

  I searched but couldn't find a solution How can I download this video ?

  


  https://vod-l3c-eu-east-2.media.dssott.com/ps01/disney/8e61fbd9-80fb-44f0-8108-c67ca45942cc/r/composite_400k_CENC_CTR_FHD_SDR_4e79c2dc-8f22-4a07-ad09-ba0251f79b55_9cf2df75-4260-4820-ada6-f953579ffbb8.m3u8

  


  #EXTM3U
#EXT-X-VERSION:6
#EXT-X-TARGETDURATION:9
#EXT-X-PLAYLIST-TYPE:VOD
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-PROGRAM-DATE-TIME:2019-01-01T00:00:00.000Z
#EXT-X-DATERANGE:ID="pod_0",START-DATE="2019-01-01T00:00:00.000Z",DURATION=3.000000001,X-START-OFFSET="0.0"
#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,KEYFORMAT="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed",KEYFORMATVERSIONS="1",URI="data:text/plain;base64,AAAAMnBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAABISEB5U5uPKPk0WpO7hIRwr3JI="
#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,KEYFORMAT="com.microsoft.playready",KEYFORMATVERSIONS="1",URI="data:text/plain;charset=UTF-16;base64,xAEAAAEAAQC6ATwAVwBSAE0ASABFAEEARABFAFIAIAB4AG0AbABuAHMAPQAiAGgAdAB0AHAAOgAvAC8AcwBjAGgAZQBtAGEAcwAuAG0AaQBjAHIAbwBzAG8AZgB0AC4AYwBvAG0ALwBEAFIATQAvADIAMAAwADcALwAwADMALwBQAGwAYQB5AFIAZQBhAGQAeQBIAGUAYQBkAGUAcgAiACAAdgBlAHIAcwBpAG8AbgA9ACIANAAuADAALgAwAC4AMAAiAD4APABEAEEAVABBAD4APABQAFIATwBUAEUAQwBUAEkATgBGAE8APgA8AEsARQBZAEwARQBOAD4AMQA2ADwALwBLAEUAWQBMAEUATgA+ADwAQQBMAEcASQBEAD4AQQBFAFMAQwBUAFIAPAAvAEEATABHAEkARAA+ADwALwBQAFIATwBUAEUAQwBUAEkATgBGAE8APgA8AEsASQBEAD4ANAArAFoAVQBIAGoANwBLAEYAawAyAGsANwB1AEUAaABIAEMAdgBjAGsAZwA9AD0APAAvAEsASQBEAD4APAAvAEQAQQBUAEEAPgA8AC8AVwBSAE0ASABFAEEARABFAFIAPgA="
#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,KEYFORMAT="PRMNAGRA",KEYFORMATVERSIONS="1",URI="data:text/plain;base64,eyJrZXktaWQiOiIxZTU0ZTZlMy1jYTNlLTRkMTYtYTRlZS1lMTIxMWMyYmRjOTIiLCJlbWkiOiJjdHIiLCJwcm0iOiJleUpqYjI1MFpXNTBTV1FpT2lKamRISWlMQ0pyWlhsSlpDSTZJakZsTlRSbE5tVXpMV05oTTJVdE5HUXhOaTFoTkdWbExXVXhNakV4WXpKaVpHTTVNaUo5In0="
#EXT-X-MAP:URI="b890e39d-85ff-425b-9a45-c3ca1f3dd423/10c8-BUMPER/02/2400K/map.mp4"
#EXTINF:3.000000001,
b890e39d-85ff-425b-9a45-c3ca1f3dd423/10c8-BUMPER/02/2400K/00/00/00_000.mp4
#EXT-X-DISCONTINUITY
#EXT-X-DATERANGE:ID="pod_1",START-DATE="2019-01-01T00:00:03.000Z",DURATION=2122.000000001,X-START-OFFSET="3.000000001"
#EXT-X-MAP:URI="a04e8798-c29c-4bb2-b6a6-52845167f3a8/3704-MAIN/02/4250K/map.mp4"
#EXTINF:8,
a04e8798-c29c-4bb2-b6a6-52845167f3a8/3704-MAIN/02/2400K/00/00/00_000.mp4
#EXTINF:8,
a04e8798-c29c-4bb2-b6a6-52845167f3a8/3704-MAIN/02/2400K/00/00/08_000.mp4
#EXTINF:8,
a04e8798-c29c-4bb2-b6a6-52845167f3a8/3704-MAIN/02/2400K/00/00/16_000.mp4


  


• Compiling ffmpeg with NVDIA GPU enabled for windows

  12 octobre 2017, par Guru

  I am working on decoding video using ffmpeg with NVDIA GPU enabled on windows platform.

  Followed below steps as per the document provided by ffmpeg to compile ffmpeg software

  1. Install msys2 from www.msys2.org.
  2. Clone FFMPEG’s public GIT repository. git clone https://git.ffmpeg.org/ffmpeg.git
  3. Create a folder named nv_sdk in the parent directory of FFMPEG and copy all the libraries from C :\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v8.0\include to and C :\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v8.0\lib\x64 to nv_sdk folder.
  4. Launch the Visual Studio x64 Native Tools Command Prompt.
  5. From the Visual Studio x64 Native Tools Command Prompt, launch the MinGW64 environment by running mingw64.exe from the msys2 installation folder.
  6. In the MinGW64 environment, install the necessary packages. pacman -S diffutil make pkg-config yasm
  7. Add the following paths by running the commands. export PATH="/c/Program Files (x86)/Microsoft Visual Studio 12.0/VC/BIN/amd64/" :$PATH export PATH="/c/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v8.0/bin/" :$PATH
  8. Go to the FFMPEG installation folder and run the following command. ./configure —enable-nonfree —enable-nvenc —enable-cuda —enable-cuvid —enable-libnpp —extra-cflags=-Ilocal/include —extra-cflags=-I../nv_sdk —extra-ldflags=-L../nv_sdk
  9. Compile the code by executing the following command. make -j 8

  But In the 8th step I am getting below error, please let me know what could be the possible solution for the issue.

  admin@ADMIN-PC MINGW64 /c/ffmpeg
  $ ./configure —enable-nonfree —enable-nvenc —enable-cuda —enable-cuvid —ena ble-libnpp —extra-cflags=-Ilocal/include —extra-cflags=-I../nv_sdk —extra-ldf lags=-L../nv_sdk
  gcc is unable to create an executable file.
  If gcc is a cross-compiler, use the —enable-cross-compile option.
  Only do this if you know what cross compiling means.
  C compiler test failed.

  If you think configure made a mistake, make sure you are using the latest
  version from Git. If the latest version fails, report the problem to the
  ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
  Include the log file "ffbuild/config.log" produced by configure as this will hel p
  solve the problem.