Dear DL, please see my previous message about what I am trying to accomplish with my code. The code you sent, that is,
for f in *.mp4; do ffmpeg -i "$f" "$f_%03d.png"; done works but is not what I want to accomplish. This line converts all the videos to images, yes, but without restarting the numbering system within each video. If I use this line of code for a directory filled with 64 videos I have to write 64 lines for each unique filename when I want to write only one line. To rephrase my question: is it possible to write a line using ffmpeg to convert a large amount of videos to images all at once while chronologically numbering the order of images per video? I'll give another example if the one I originally provided is unclear. each video file has a unique name and there are A LOT of videos. video_file_a_1.mp4 video_file_b_2.mp4 video_file_c_3 .mp4 I want my .pngs to look like: video_file_a_1_001.png video_file_a_1_002.png video_file_a_1_003.png video_file_b_2_001.png video_file_b_2_002.png video_file_b_2_003.png video_file_c_3_001.png video_file_c_3_002.png video_file_c_3_003.png If I use the code you sent: for f in *.mp4; do ffmpeg -i "$f" "$f_%03d.png"; done what I get is: 001.png 002.png 003.png 004.png ...... and on and on and on because I have 64 video files in this directory. Which means I have to write that line 64 times and modify it per video name. Is there a way around this? Can ffmpeg designate multiple outputs options? Sincerely, Ashley On Thu, Feb 28, 2019 at 2:57 AM DopeLabs <[email protected]> wrote: > use the variable for the filename in the output filename > > for f in *.mp4; do ffmpeg -i "$f" "$f_%03d.png"; done > > cheers =] > > DL > > > > > On Feb 27, 2019, at 6:04 52PM, Ashley Smiley <[email protected]> > wrote: > > > > Hello, > > > > I am writing to ask advice about how to augment my ffmpeg command line. I > > am working through my iMac's Terminal. > > > > The task I am trying to perform is to convert a whole directory of .mp4 > > files (all with unique filenames) to .png images whose labels correspond > to > > their original .mp4 files. > > > > The line I've run is: > > > > *for i in *.mp4; * > > > > *do ffmpeg -1 "$i" image%03d.png; * > > > > *done* > > > > This command line batch converts all .mp4 files to continuous .png files. > > That is, when moving from video 1 to video 2, the labeling does not start > > all over to indicate a break between video files. I would like to insert > > label breaks so that I can track which images correspond to which video > and > > know exactly how many frames exist per video by conveniently having them > > labeled starting from 0 or 1 each time. > > > > However, I don't know how to do this as I've searched online for a few > days > > and I think it's time for suggestions. > > > > An example list of filenames: > > > > calib_checker_22sep18_154022_top_1x1cm.*mp4* > > calib_checker_22sep18_154022_side_1x1cm.*mp4* > > calib_ball_22sep18_154750_top*.mp4* > > calib_ball_22sep18_154930_side.*mp4* > > > > and I want each to have a list of corresponding .pngs, i.e.: > > > > calib_checker_22sep18_154022_top_1x1cm_*001.png* > > calib_checker_22sep18_154022_top_1x1cm_*002.png* > > calib_checker_22sep18_154022_top_1x1cm_*003.png* > > > > calib_checker_22sep18_154022_side_1x1cm_*001.png* > > calib_checker_22sep18_154022_side_1x1cm_*002.png* > > > > calib_ball_22sep18_154750_top_*001.png.*....etc. > > > > calib_ball_22sep18_154930_side_*001.png*....etc. > > > > One last note: > > > > The reason I want to batch process is because there are at least 64 video > > files in the directory total. > > > > Sincerely, > > > > Ashley Smiley > > -- > > Ashley Smiley > > Ph.D. Candidate, Dudley Lab > > Department of Integrative Biology > > University of California, Berkeley > > berkeleyflightlab.org > > _______________________________________________ > > ffmpeg-user mailing list > > [email protected] > > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > > > To unsubscribe, visit link above, or email > > [email protected] with subject "unsubscribe". > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". -- Ashley Smiley Ph.D. Candidate, Dudley Lab Department of Integrative Biology University of California, Berkeley berkeleyflightlab.org _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
