Recherche avancée

Sur d’autres sites (11886)

• ffmpeg - seamless crossfade loop for the part of video

  14 janvier 2021, par Flamin GO

  I need to apply crossfade to the last X frames of a video with the first X frames in order to obtain a seamless loop, but making this for the necessary part of video.

  


  Here's the answer for looping the entire video.

  


  Currently what I have :
(Whole video duration = 25. Cutted (result) part = 15 sec (from 5 to 20 sec pos). Transition = 1 sec.)

  


  ffmpeg -i input.mp4 -ss 5 -to 20 -filter_complex
    "[0]split[body][pre];
     [pre]trim=duration=1,format=yuva420p,fade=d=1:alpha=1,setpts=PTS+( (15+(5-1)) /TB)[jt];
     [body]trim=1,setpts=PTS-STARTPTS[main];
     [main][jt]overlay"  -c:v libx264 -preset veryslow -b:v 2500K output.mp4
 


  


  In this case, everything works, but at the end of the resulting video, a piece from the original video is superimposed, which starts from 0 to 1 second, and not from 4 to 5 seconds of the original video, as it should be.

  


  I read the official ffmpeg documentation, tried some actions on "start/end" parameters for "trim/fade" with changing of "setpts", but I always got just another batch of bugs.

  


• Need available FFMPEG transition effect commands for single video file in android ?

  16 juillet 2019, par Gopinathan B

  I am able to produce Fade In & Fade Out transition effect for single video file. I am fail to get other transition effects for single video. Some of the transition commands are not correct. There is no official documentation to do.

  This will fade in video for 5 sec in start.

  "-y", "-i", masterVideoFile!!.absolutePath, "-acodec", "copy", "-vf", "fade=t=in:st=0:d=5", outputFile.absolutePath

  This will fade out video for 5 sec in end.

  "-y", "-i", masterVideoFile!!.absolutePath, "-acodec", "copy", "-vf", "fade=t=out:st=$finalTime:d=5", outputFile.absolutePath

  I need video to transition from Right to Left, Left to Right, Top to Bottom & Bottom to Top and start playing video afterwards.

• How to speed up m3u8 to mp4 conversion using ffmpeg

  17 décembre 2022, par Sahil Bagdi

  I am downloading mp4 from m3u8 using ffmpeg

  


  ffmpeg -i "https://92vod-adaptive.akamaized.net/exp=1671307488~acl=%2F48b4b587-13d3-42f9-bfb9-8a0c92876523%2F%2A~hmac=66ce19e1dc862e0b718a3eb73b42f54bf83855db43831e146252adccf0dc6f1a/48b4b587-13d3-42f9-bfb9-8a0c92876523/sep/video/67e2046f,8f9cecb7,b83b6682,0f26a563,3c957583/audio/0b5e7d8c,5f37ccc0,60c393d7/subtitles/59401986-English%20%28auto-generated%29-en-x-autogen-cc/master.m3u8?subcache=1&external-subs=1&subtoken=38c45483ebf2c8238ec8504c20207a588d72f633f79608c00f5950d0300576f3&query_string_ranges=1" -c copy -map p:0 "Testing of Hypothesis.mp4"



  


  but it is taking too long, like my speed is 10 MBps(80 mbps) size is 300MB, should be done in 30 seconds, but it takes upto 5-10 minutes sometimes, now I know it does some converting thing

  


  My question is is there any way to increase its speed ??
I have CPU- AMD Ryzen 5600H and
GPU - NVIDIA RTX 3050

  


  Some help will be really appreciated

  


  I checked some nvidia encoding and decoding things from there official website and tried many things from there but always stuck at some error