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• How to add a scrolling text of the audio file song name on a sepecific part of a video and stream it to youtube using ffmpeg

  5 novembre 2022, par Youssef Lasheen

  I know this is s very long and specific question but it can be broken down to these points :

  


  

  • How to add a text of song name on video

  


  • How to scroll in a specific area not from the beginning of the video to the end

  


  • How to stream a looping video and loop through multiple audio files to youtube/twitch.

  


  


  I kinda got the third point but i think its not an elegant solution

  


  ffmpeg -re -stream_loop -1 -i back.gif -safe 0 -i mylist.txt -c copy -map 0:v:0 -map 1:a:0 -c:v libx264 -preset veryfast -b:v 3000k -maxrate 3000k \ -bufsize 6000k -pix_fmt yuv420p -g 50 -c:a aac -b:a 160k -ac 2 \ -ar 44100  -f flv rtmp://live.twitch.tv/app/$key

  


  I also found this script that adds a scrolling image (input.jpg) to specific aree of a video but i coudlnt integrate it with the script above

  


  ffmpeg -y -ignore_loop 0 -r 25 -i back.gif -loop 1 -r 25 -i input.jpg -filter_complex "[0:v]crop=270:257:360:55[c0];[c0][1:v]overlay=y='257-t*257*0.04':eof_action=endall[fg];[0:v][fg]overlay=x=360:y=55:eof_action=endall" -t 50 output.mp4

  


• avcodec/mpegvideo : Split ff_mpv_reconstruct_mb() into de/encoder part

  14 octobre 2022, par Andreas Rheinhardt

  avcodec/mpegvideo : Split ff_mpv_reconstruct_mb() into de/encoder part
  This has the advantage of not having to check for whether
  
  a given MpegEncContext is actually a decoder or an encoder
  
  context at runtime.
  To do so, mpv_reconstruct_mb_internal() is moved into a new
  
  template file that is included by both mpegvideo_enc.c
  
  and mpegvideo_dec.c ; the decoder-only code (mainly lowres)
  
  are also moved to mpegvideo_dec.c. The is_encoder checks are
  
  changed to #if IS_ENCODER in order to avoid having to include
  
  headers for decoder-only functions in mpegvideo_enc.c.
  This approach also has the advantage that it is easy to adapt
  
  mpv_reconstruct_mb_internal() to using different structures
  
  for decoders and encoders (e.g. the check for whether
  
  a macroblock should be processed for the encoder or not
  
  uses MpegEncContext elements that make no sense for decoders
  
  and should not be part of their context).
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/mpeg_er.c
  • [DH] libavcodec/mpegvideo.c
  • [DH] libavcodec/mpegvideo.h
  • [DH] libavcodec/mpegvideo_dec.c
  • [DH] libavcodec/mpegvideo_enc.c
  • [DH] libavcodec/mpegvideodec.h
  • [DH] libavcodec/mpv_reconstruct_mb_template.c

• Animated GIF overlay is not looping on Video built from Image FFmpeg

  15 octobre 2022, par nicover

  My goal is to transform an image .jpg into a .mp4 video and then add a .gif overlay on the video created.
The problem is the GIF overlay on the video created is not playing/looping.

  


  Here is the command for the image -> video :

  


  "-framerate 1/10 -i image.jpg -vf scale=720:1280 -t 10 -pix_fmt yuv420p -c:v libx264 -movflags faststart output.mp4"


  


  This create successfully a video of 10seconds from my image.

  


  Here is the command for applying the gif as overlay :

  


  -i video.mp4 -ignore_loop 0 -i animated.gif -filter_complex '[1:v]scale=321.0:-1[ovrl0];[0:v][ovrl0]overlay=160.5:487.28:shortest=1' -codec:a copy -codec:v libx264 -preset ultrafast output.mp4


  


  The overlay is correctly applied but it's not playing or looping at all.

  


  I don't know what I am doing wrong because the last command (overlay) is working perfectly when it's triggered from a classic video file (like from recorded camera or something) -> the gif is looping as expected.

  


  So I'm assuming the real issue come from the video I created from my image but result I've got seems to be good so can't find what's wrong with the image or video created.

  


  Can someone could help me please to fix it and understand this case ?