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• Revision 59408 : Au final si... c’était nécessaire

  16 mars 2012, par kent1@… — Log

  Au final si... c’était nécessaire

• FFMPEG, How to concat mp4 files with different fps to create final video with different fps

  9 octobre 2019, par Newbie Engineer

  I am using following commands

  images to video

  ffmpeg.exe -r 5 -f image2 -s 960x720 -i D :/images%2d.PNG -vcodec libx264 -crf 25 -pix_fmt yuv420p D :/tester.mp4

  I created several mp4 with different fps(5, 10, 15, 20...), and created a list of mp4 files name with different FPS, then tried to concat using

  ffmpeg -f concat -i D :/mylist.txt -c copy final.mp4

  But this is not concatenating properly, last couple of mp4 files are not being joined properly and there is always two or three seconds gap between each joined mp4 files. Wondering if any one has dealt with this issue. I want to keep the FPS of each single mp4 files as it is, trying to get smooth final video with progressing fps like 5, 10, 15, 20.. FPS).

  FFMPEG version 4.2.1, (no audio involved)

• Problem updating drawtext with file using ffmpeg [duplicate]

  17 novembre 2020, par drmobbins

  I have a shell script that runs to combine a 24/7 AAC audio stream with a 720p HD picture/background and streams that output live to YouTube. This is for an internet radio station. The script works perfectly except for the drawtext option. The drawtext option references a file that is updated every 15 seconds (using Python and Cron) with the correct song metadata (from the radio automation suite) and is supposed to print the contents of the metadata file to the screen. This happens one time when the ffmpeg command is run in the script, but doesn't update after a song change.

  


  I would assume that since the metadata file is changing every 15 seconds on the server that it would update the song details in the output video that could be seen on YouTube...but it doesn't.

  


  #!/bin/bash

#Quality settings
VBR="1500k"
FPS="30"
QUAL="ultrafast"
AUDIO_ENCODER="aac"

#Youtube settings
YOUTUBE_URL=" rtmp://a.rtmp.youtube.com/live2"
YOUTUBE_KEY="xxxx-xxxx-xxxx-xxxx-xxxx"

#Sources
VIDEO_SOURCE="bg720p.jpg"
AUDIO_SOURCE="http://stream.url"

#Metadata settings
TRACK_METADATA=$(cat metadata.txt)

ffmpeg \
 -loop 1 \
 -re \
 -framerate $FPS \
 -i "$VIDEO_SOURCE" \
 -thread_queue_size 512 \
 -i "$AUDIO_SOURCE" \
 -vf "drawtext=fontfile=OpenSans-Light.ttf:text=$TRACK_METADATA:x=10:y=680:fontsize=20:fontcolor=white" \
 -c:v libx264 -tune stillimage -pix_fmt yuv420p -preset $QUAL -r $FPS -g $(($FPS *2)) -b:v $VBR \
 -c:a $AUDIO_ENCODER -threads 6 -ar 44100 -b:a 64k -bufsize 512k -pix_fmt yuv420p \
 -f flv $YOUTUBE_URL/$YOUTUBE_KEY


  


  What am I missing that will make the output continually check for file changes and use drawtext to display the contents. Thanks in advance !