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• How To Extract First Non-Corrupted Video Frame Using FFMPEG

  30 avril 2021, par macuseronline

  I am trying to extract the first frames from a series of videos as single JPEG files, and for the most part this command works well :

  


  ffmpeg -hide_banner -loglevel warning -ss 1 -i $file -vframes 1 -f image2 "$name.jpg"


  


  The problem I am running into is, some of the videos' first frames are corrupted and FFMPEG is not only reporting the error in Terminal, but is also saving that bad frame as the single JPEG.

  


  Since the entire video is otherwise fine, or at least certainly contains some frames that are good, I am looking to have FFMPEG keep trying further frames until it finds one that is not corrupted and save that one as the single JPEG. I thought about writing code that would re-try the command after adding an x value (say 100) to the -ss switch until it processes the file without an error, but was hoping maybe FFMPEG has a native method by which to do this that would avoid the extra code.

  


  Any help with this would be appreciated !

  


• FFMPEG joining multiple videos in grid

  31 mars 2020, par Adam Gosztolai

  I am trying to join a series of videos in a grid. Here is a command I used for 3 videos.

  ffmpeg -y -i /mnt/labserver/vid1.mp4 -i /mnt/labserver/vid2.mp4 -i /mnt/labserver/vid3.mp4 -filter_complex "color=s=360x360:c=Black [nbase];[0:v]setpts=PTS-STARTPTS,scale=180x180[b0];[1:v]setpts=PTS-STARTPTS,scale=180x180[b1];[nbase][b0]overlay=shortest=1:x=0:y=180[temp0];[temp0][b1]overlay=repeatlast=1:x=0:y=360[temp1];[temp1][b2]overlay=repeatlast=1:x=0:y=540[temp2]" -c:v libx264 -pix_fmt yuv420p /mnt/labserver/videos_joined.mp4

  I get the following error

  Invalid stream specifier: b2

  As far as I recall this has previously worked for me. Could someone tell me what could be wrong here and whether perhaps the error depends on the FFmpeg version ?

  Thank you !!

• Creating Real-Time Video Stream from Image Frames using FFmpeg and Streaming to RTMP URL

  12 mars 2024, par Dhairya Verma

  I've been working on a project where I need to continuously convert a series of image frames into a video and stream it to an RTMP URL in real time. I initially tried using FFmpeg with the following command :

  


  ffmpeg -f avfoundation -i ":1" -framerate 30 -i "./image%05d.png" -c:v libx264 -preset medium -tune stillimage -crf 25 -c:a aac -b:a 128k -ar 44100 -vf "format=yuv420p,scale=1280:720" -maxrate 3000k -bufsize 6000k -f flv "rtmps://your_rtmp_url_here"



  


  However, I encountered issues when new images were added to the folder in real-time. The solution wasn't as straightforward as I initially thought.

  


  Does anyone have experience with real-time video streaming from dynamically changing image frames using FFmpeg ? Any help or suggestions would be greatly appreciated !

  


  Thanks !