On Tue, Oct 10, 2017 at 4:40 PM, Mikhail V <mikhail...@gmail.com> wrote:
> Currently it is possible to delete the input file if I specify same > filename in output, > for example: > > ffmpeg -y -i input input > Aren't you specifying that with '-y' you want to "overwrite output file without asking" > or simply: > ffmpeg -i input input > (this will promt y/n) > I believe this is the default behavior for any output file that is present whether it matches input or not (in my example both foo.mkv and bar.mkv file present): ffmpeg -i foo.mkv bar.mkv Input #0, matroska,webm, from 'foo.mkv': Metadata: ENCODER : Lavf57.71.100 Duration: 01:00:30.05, start: 0.000000, bitrate: 5195 kb/s Stream #0:0: Video: h264 (Main), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default) Metadata: ENCODER : Lavc57.89.100 h264_nvenc DURATION : 01:00:30.047000000 Stream #0:1: Audio: aac (LC), 48000 Hz, 5.1, fltp (default) Metadata: ENCODER : Lavc57.89.100 aac DURATION : 01:00:30.021000000 File 'bar.mkv' already exists. Overwrite ? [y/N] > So this will immideately destroy the input file. > It did not happened with me often, but still happened a pair of times. > That is why almost never user '-y' and only if I am 100% certain it is safe. Which in my case are FIFOs > Was quite funny actually :) Funniest thing that I could not recover the > file > because it is same name. > That reminds me of when I accidentally did 'rm -rf /*' > > So, it would be nice if ffmpeg compare the output path with all input paths > and exit with an error. > Is it possible for you to run your command without '-y' or if you're using a script, then to compare your input and output before passing them to ffmpeg? _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".