On Sep 18, 2024, at 11:55 AM, Oliver Fromme <oli...@fromme.com> wrote: > > Laine wrote: >> I use ffmpeg on my Mac without understanding much of it. I'd like to >> be able to determine where in the video occasional reported errors >> occur so I can view the affected passage in the output. My questions >> about the following command and output are, "do the errors reported >> include the time in the video where the error occurred, and if so, >> how do I calculate that time in hours, minutes, and seconds so I can >> view its containing passage in the encoded video?" >> >> The errors I'm referring to in the output are >> >> [h264 @ 0x127f33070] concealing 858 DC, 858 AC, 858 MV errors in B >> frame0.4kbits/s dup=76 drop=0 speed=8.83x >> [h264 @ 0x127f44130] left block unavailable for requested intra mode >> [h264 @ 0x127f44130] error while decoding MB 0 30, bytestream 49191 >> [h264 @ 0x127f44130] concealing 4609 DC, 4609 AC, 4609 MV errors in P frame >> [vist#0:0/h264 @ 0x127f05730] [dec:h264 @ 0x127f06d30] corrupt decoded frame > > There are no time stamps in the above output. > > However, when you use the option ``-stats'', FFmpeg prints progress > information. I think this is even the default (unless you give the > option ``-nostats''). It looks like this: > > frame= 175 fps= 12 q=29.9 Lsize= 925kB time=00:00:08.12 bitrate= 932.6kbits/s > speed=0.549x > ^^^^^^^^^^ ^^^^^^^^^^^^^^^^ > > As you can see, it contains a frame number as well as a time stamp > in HH:MM:SS.ss format. > > The problem is, when a module prints a diagnostic message (in your > case it's the h264 decoder module), that message overwrites parts > of the progress information line. This seems to happen in your > case, so you don't see the time stamp. > > There are several ways to solve this. One way is to modify FFmpeg's > output by appending a tr(1) command like this: > > ffmpeg ... 2>&1 | tr '\r' '\n' > >
Thanks! The original ffmpeg command line from original post is ffmpeg -i '/Users/me/Downloads/philanthropist.ts' -map 0:0 -vf decimate=cycle=5,crop=1920:1024:0:28 -c:v h264_videotoolbox -b:v 3000k -color_primaries:v bt709 -color_trc:v bt709 -colorspace:v bt709 -metadata:s:v "title=" -disposition:v default -map 0:1 -c:a:0 copy -metadata:s:a:0 "title=" -disposition:a:0 default -metadata:g "title=" -r 24 -movflags disable_chpl '/Users/me/Downloads/philanthropist.mp4' Can you please tell me if the following is a suitable version of the command that includes your suggested modification? ffmpeg -i '/Users/me/Downloads/philanthropist.ts' -map 0:0 -vf decimate=cycle=5,crop=1920:1024:0:28 -c:v h264_videotoolbox -b:v 3000k -color_primaries:v bt709 -color_trc:v bt709 -colorspace:v bt709 -metadata:s:v "title=" -disposition:v default -map 0:1 -c:a:0 copy -metadata:s:a:0 "title=" -disposition:a:0 default -metadata:g "title=" -r 24 -movflags disable_chpl '/Users/me/Downloads/philanthropist.mp4' 2>&1 | tr '\r' '\n' Thanks again. Sincerely, L. Lee _______________________________________________ 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".
