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
Thanks.
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';sleep 3;echo'
==========================
philanthropist.detelecine.mp4 FINISHED!
rate values: 3800
==========================
'
Output:
ffmpeg version N-117060-gfec6a8df31 Copyright (c) 2000-2024 the FFmpeg
developers
built with Apple clang version 16.0.0 (clang-1600.0.26.3)
configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/HEAD-fec6a8d
--enable-shared --cc=clang --host-cflags= --host-ldflags= --enable-gpl
--enable-libaom --enable-libdav1d --enable-libharfbuzz --enable-libmp3lame
--enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis
--enable-libvpx --enable-libx264 --enable-libx265 --enable-libfontconfig
--enable-libfreetype --enable-frei0r --enable-libass --enable-demuxer=dash
--enable-opencl --enable-audiotoolbox --enable-videotoolbox --enable-neon
--disable-htmlpages --enable-chromaprint --enable-libbluray --enable-libfdk-aac
--enable-libsoxr --enable-libtwolame --enable-libxvid --enable-nonfree
libavutil 59. 36.100 / 59. 36.100
libavcodec 61. 14.100 / 61. 14.100
libavformat 61. 5.101 / 61. 5.101
libavdevice 61. 2.101 / 61. 2.101
libavfilter 10. 2.102 / 10. 2.102
libswscale 8. 2.100 / 8. 2.100
libswresample 5. 2.100 / 5. 2.100
libpostproc 58. 2.100 / 58. 2.100
Input #0, mpegts, from '/Users/me/Downloads/philanthropist.ts':
Duration: 02:01:47.16, start: 1.400000, bitrate: 15016 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv,
bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn
Stream #0:1[0x101]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side),
fltp, 640 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_videotoolbox))
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[mp4 @ 0x127f05a10] track 1: codec frame size is not set
Output #0, mp4, to '/Users/me/Downloads/philanthropist.mp4':
Metadata:
encoder : Lavf61.5.101
Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709,
progressive), 1920x1024 [SAR 1:1 DAR 15:8], q=2-31, 3000 kb/s, 24 fps, 12288
tbn (default)
Metadata:
encoder : Lavc61.14.100 h264_videotoolbox
Stream #0:1: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 640
kb/s (default)
[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
Last message repeated 1 times
[out#0/mp4 @ 0x60000266c0c0] video:2678214KiB audio:570865KiB subtitle:0KiB
other streams:0KiB global headers:0KiB muxing overhead: 0.130871%
frame=175372 fps=213 q=-0.0 Lsize= 3253330KiB time=02:01:47.11
bitrate=3647.3kbits/s dup=76 drop=0 speed=8.86x
/tmp/execme.command: line 10: echo
==========================
philanthropist.detelecine.mp4 FINISHED!
rate values: 3800
==========================
Sincerely,
L. Lee
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