Thank you! On Sun, Jun 27, 2021 at 9:26 AM Gyan Doshi <ffm...@gyani.pro> wrote:
> > > On 2021-06-27 11:43, Eduard B wrote: > > Hi list, > > > > I am using ffmpeg to convert a large set of timelapse still frames (JPGs) > > captured by my surveillance camera to a video. Using x265 library to make > > the file smaller. The particular batch I have tested has 14401 JPG files > in > > a folder (one image captured every 6 seconds). > > > > Command is: > > ffmpeg -i /mnt/user/cctv/mjwVb9pFuK/8sHGyfFGu6_timelapse/$(date -d "-1 > > days" '+%Y-%m-%d')/%06d.jpg -c:v libx265 -preset medium -crf 20 -r 30 > -c:a > > aac -b:a 128k /mnt/user/cctv/mjwVb9pFuK/8sHGyfFGu6_timelapse/$(date -d > "-1 > > days" '+%Y-%m-%d')_x265_correct.mp4 > > > > I wanted to convert to a 30 FPS video, the command I have been using, > which > > works, converts the files to a video, however it complains about > duplicate > > frames. While investigating, I have realized the final duplicate frames > > count has 2880 frames, which is 1/5 of the total amount of still images. > > Seems to me that the encoder assumes the input is recorded at 25 FPS and > > tries to convert it to a video which has the same length, but with 30 > FPS. > > However, the input is a series of still images with no frame rate. > > > > I have changed the command to a similar one, using 25 FPS frame rate > > parameter value instead, and the complaint about duplicate frames is > gone. > > This means I would need to explicitly tell the encoder the input is using > > 30 FPS, rather than the default assumption of 25. I have been looking at > > the "--fps" option, however documentation says "YUV only", I'm not sure > > it's applicable. > > For image sequence inputs, use the framerate option. > > ffmpeg -framerate 30 -i ... > > Regards, > Gyan > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
