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• In Advanced SubStation Alpha (Ass file) how can I animate each word as it is spoken ?

  29 mai 2024, par Nick Powers

  Hello I am trying to get Ass (Advanced SubStation Alpha) code to animate (highlight in green) each word as it is spoken and then have it revert back to white afterwards. What happens with my code is very odd. At first I cannot even see any text. It then appears with multiple lines overlapped, partially hanging off the screen. From this point it "kind of" works. I can see the desired highlighting happening but because the text is all jumbled and overlapping it can hardly be called a success.

  


  In case it is relevant I am using ffmeg to burn in the subtitles. I am using the following command :

  


  ffmpeg -i FortuneTeller1.mp4 -vf "ass=FortuneTeller1.ass" Subtitled.mp4

  


  The resolution of the source video is 1080x1920 (vertical).

  


  My ultimate goal is to burn Hormozi style text with per word animations. I'm far from that so any input would be appreciated ! If you need any additional info/code to help troubleshoot this please let me know what you need and I will provide it.

  


  I have the following Ass code in the Events section :

  


  Dialogue: 0,0:00:02.48,0:00:03.28,Default,,0,0,0,,{\c&H00FF00&\pos(640,480)}In{\c&H00FFFFFF&} the tapestry of time, a visitor from shadows past shall emerge, igniting flames of forgotten yearnings.
Dialogue: 0,0:00:03.48,0:00:04.28,Default,,0,0,0,,In {\c&H00FF00&\pos(640,480)}the{\c&H00FFFFFF&} tapestry of time, a visitor from shadows past shall emerge, igniting flames of forgotten yearnings.
Dialogue: 0,0:00:04.68,0:00:09.68,Default,,0,0,0,,In the {\c&H00FF00&\pos(640,480)}tapestry{\c&H00FFFFFF&} of time, a visitor from shadows past shall emerge, igniting flames of forgotten yearnings.
Dialogue: 0,0:00:09.88,0:00:01.48,Default,,0,0,0,,In the tapestry{\c&H00FF00&\pos(640,480)}of{\c&H00FFFFFF&} time, a visitor from shadows past shall emerge, igniting flames of forgotten yearnings.
Dialogue: 0,0:00:02.08,0:00:04.89,Default,,0,0,0,,In the tapestry of {\c&H00FF00&\pos(640,480)}time{\c&H00FFFFFF&}, a visitor from shadows past shall emerge, igniting flames of forgotten yearnings.
Dialogue: 0,0:00:06.89,0:00:10.49,Default,,0,0,0,,In the tapestry of time,{\c&H00FF00&\pos(640,480)}a{\c&H00FFFFFF&} visitor from shadows past shall emerge, igniting flames of forgotten yearnings.
Dialogue: 0,0:00:10.89,0:00:03.29,Default,,0,0,0,,In the tapestry of time, a {\c&H00FF00&\pos(640,480)}visitor{\c&H00FFFFFF&} from shadows past shall emerge, igniting flames of forgotten yearnings.
Dialogue: 0,0:00:03.69,0:00:07.49,Default,,0,0,0,,In the tapestry of time, a visitor {\c&H00FF00&\pos(640,480)}from{\c&H00FFFFFF&} shadows past shall emerge, igniting flames of forgotten yearnings.
Dialogue: 0,0:00:08.09,0:00:11.49,Default,,0,0,0,,In the tapestry of time, a visitor from {\c&H00FF00&\pos(640,480)}shadows{\c&H00FFFFFF&} past shall emerge, igniting flames of forgotten yearnings.
Dialogue: 0,0:00:11.89,0:00:04.89,Default,,0,0,0,,In the tapestry of time, a visitor from shadows {\c&H00FF00&\pos(640,480)}past{\c&H00FFFFFF&} shall emerge, igniting flames of forgotten yearnings.
Dialogue: 0,0:00:05.29,0:00:03.61,Default,,0,0,0,,In the tapestry of time, a visitor from shadows past {\c&H00FF00&\pos(640,480)}shall{\c&H00FFFFFF&} emerge, igniting flames of forgotten yearnings.
Dialogue: 0,0:00:03.65,0:00:04.09,Default,,0,0,0,,In the tapestry of time, a visitor from shadows past shall {\c&H00FF00&\pos(640,480)}emerge{\c&H00FFFFFF&}, igniting flames of forgotten yearnings.
Dialogue: 0,0:00:04.13,0:00:04.57,Default,,0,0,0,,In the tapestry of time, a visitor from shadows past shall emerge, {\c&H00FF00&\pos(640,480)}igniting{\c&H00FFFFFF&} flames of forgotten yearnings.
Dialogue: 0,0:00:04.61,0:00:04.97,Default,,0,0,0,,In the tapestry of time, a visitor from shadows past shall emerge, igniting {\c&H00FF00&\pos(640,480)}flames{\c&H00FFFFFF&} of forgotten yearnings.
Dialogue: 0,0:00:05.03,0:00:05.09,Default,,0,0,0,,In the tapestry of time, a visitor from shadows past shall emerge, igniting flames {\c&H00FF00&\pos(640,480)}of{\c&H00FFFFFF&} forgotten yearnings.
Dialogue: 0,0:00:05.13,0:00:05.55,Default,,0,0,0,,In the tapestry of time, a visitor from shadows past shall emerge, igniting flames of {\c&H00FF00&\pos(640,480)}forgotten{\c&H00FFFFFF&} yearnings.
Dialogue: 0,0:00:05.59,0:00:06.31,Default,,0,0,0,,In the tapestry of time, a visitor from shadows past shall emerge, igniting flames of forgotten {\c&H00FF00&\pos(640,480)}yearnings.{\c&H00FFFFFF&}.


  


• How to accurately extract I-frame and P-frame information from H.264 files, including starting position and frame size ? [closed]

  7 juin 2023, par xiang

  I'm working with some H.264 encoded video files, and I want to extract I-frame and P-frame information, including their starting positions and frame sizes.

  


  I tried using FFmpeg and h264bitstream tools, but I didn't get the results I wanted. FFmpeg can only output the type and timestamp of each frame, but not the position and size. The h264bitstream can output the type, position, and size of each NALU, but cannot distinguish between I-frames and P-frames.
I wonder if there is an easier or more accurate way to extract I-frame and P-frame information from H.264 files, including starting position and frame size ? I don't want to decode the entire video, just analyze the bitstream.

  


• ffmpeg seek and change select filter after starting

  15 avril 2023, par Ta946

  Im using python to create something like a video player, I've written an ffmpeg wrapper to read a video.

  


  I want to dynaamically seek after ffmpeg has already started running. Eg : read n frames, seek to frame 100, read n frames, seek back to frame 50, read n frames.

  


  Another thing my program needs to do is read every nth frame using ffmpeg's select filter. And be able to change n after it has already started running. eg : read every 2nd frame then change to read every 10th frame.

  


  I create the ffmpeg process using Popen with the following command :

  


  ffmpeg -i {path} -ss {seek_time} -f  rawvideo -pix_fmt bgr24 -vsync 0 -vf select="not(mod(n\,{skip_size}))" -


  


  I haven't found any way to seek or change select filter after ffmpeg starts.

  


  So I have to kill the Popen process, and create a new one with the updated seek_time and/or skip_size. Which creating a new process is extremely slow

  


  Is there a faster way to achieve this ?