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• FFmpeg concatenation, no Audio in Final Output

  12 septembre 2016, par user4889724

  I have the following command working in ffmpeg, which adds 1 second of a black frame to the beginning of the video. However, I lose the audio from the original video in the output video. How can I adjust the command to make sure the original audio stays with the final output, or better yet, there is 1 second of "blank" audio at the beginning so it matches the new output video.

  ffmpeg -i originalvideo -f lavfi -i color=c=black:s=1920x1080:r=25:sar=1/1 -filter_complex "[0:v] setpts=PTS-STARTPTS [main]; [1:v] trim=end=1,setpts=PTS-STARTPTS [pre]; [pre][main] concat=n=2:v=1:a=0 [out]" -map "[out]" finaloutputvideo.mp4

• With ffmpeg print onto clipped video hh:mm:ss time *from original* and hh:mm:ss total duration from original

  25 mai 2023, par Kes

  I am using arch linux and bash and ffmpeg, all are up to date and the latest versions.

  


  I am clipping a video that is 30 seconds long and wish to clip from 5 secs to 10 seconds to a new file, from the original.

  


  In the bottom right hand corner of the clip I wish to show timestamps from the original video as follows

  


  

  • in the 5th second "00:00:05/ 00:00:30"

  


  • in the 6th second "00:00:06/ 00:00:30"
    
etc

  


  • in the 10th second "00:00:10/ 00:00:30"

  


  


  This is an apparentley simple question(?) but the syntax of the command is not at all obvious and I am hoping an expert may shed some light on this.

  


  All I have so far for the drawtext part, which does not do what I want as it only counts the elapsed time from t=0 of the new clip, whereas I want it to show the timestamp and total duration of the original clip

  


  drawtext I started with

  


  "drawtext=text='%{pts\:gmtime\:0\:%M\\\\\:%S}':fontsize=24:fontcolor=black:x=(w-text_w-10):y=(h-text_h-10)"


  


  ffmpeg line with drawtext I have started with

  


  ffmpeg -ss 00:00:05 -i  "$in_file" -filter_complex "drawtext=fontfile=font.ttf:text='sample text':x=10:y=10:fontsize=12:fontcolor=white:box=1:boxcolor=black@0.5:boxborderw=5,drawtext=text='%{duration\:hms}':fontsize=12:fontcolor=black:x=(w-text_w-10):y=(h-text_h-10)" -t 5 -c:a copy -c:v libx264 out_file.mp4


  


• How to convert date format of text in m3u8 file ? [closed]

  30 décembre 2020, par Rekabet Kurumu

  I have a Flussonic media server. I'm transcoding RTMP into HLS and must edit the M3U8 file.

  


  Problem :
How to change the date part of a name in segments of an .m3u8 file ?

  


  If stream name is "sample" output will be foo.com/stream.m3u8 this is perfect. but inside m3u8 file outout looking like this

  


  #EXTM3U
#EXT-X-TARGETDURATION:5
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:20633
#EXT-X-PROGRAM-DATE-TIME:2020-12-30T11:15:07Z
#EXTINF:5.000,
2020/12/30/11/15/07-05000.ts?token=ADM1-1609326905-99fddfc3eb912171a5b85e553588a563704f5fb9
#EXTINF:5.000,
2020/12/30/11/15/12-05000.ts?token=ADM1-1609326905-99fddfc3eb912171a5b85e553588a563704f5fb9
#EXTINF:5.000,
2020/12/30/11/15/17-05000.ts?token=ADM1-1609326905-99fddfc3eb912171a5b85e553588a563704f5fb9


  


  output lookin 2020/12/30/11/15/ like this. i want this part will be microtime or time.

  


  For example :

  


  1609326905-05000.ts?token=99fddfc3eb912171a5b85e553588a563704f5fb9
1609327050-05000.ts?token=99fddfc3eb912171a5b85e553588a563704f5fb9
1609329450-05000.ts?token=99fddfc3eb912171a5b85e553588a563704f5fb9


  


  is it possible ?