Timecode based filenames

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Timecode based filenames

Colin Bitterfield
Question on Timecode Based Filenames:


What is required to generate a filename based on timecode.

i.e. filename-start-time_end-time.mov

The % variables don’t seem to be well defined in the documentation.

I have it working with strtime 1 and using %H%M%S type variables.

Is there a reference for the %variables ?

Regards,

Colin

ps read man ffmpeg-formats (and the documentation pages)


Command:

gtimeout 62m   /opt/local/bin/ffmpeg -hwaccel videotoolbox -benchmark_all -hide_banner -stats -loglevel error -c dvvideo -pix_fmt 0rgb -capture_raw_data true -f avfoundation -i "ZR25 MC"  -c: copy -f dv pipe: | /opt/local/bin/ffmpeg -i pipe: -hide_banner -c:v dvvideo -c:a:0 pcm_s16le   -strftime 1 -copyts -timecode "00:00:00;00" -increment_tc 1 -reset_timestamps 0 -segment_time 00:05:00  -f segment  “video_%H-%M-%S_production_original.mov" -y


The gtimeout doesn’t seem to work; but that is a different issue.

Platform OSX 10.14.x

FFMPEG:

ffmpeg version 4.2.git Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-librsvg --enable-libtheora --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libsoxr --enable-libspeex --enable-libass --enable-libbluray --enable-lzma --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libfribidi --disable-libjack --disable-libopencore-amrnb --disable-libopencore-amrwb --disable-libxcb --disable-libxcb-shm --disable-libxcb-xfixes --disable-indev=jack --enable-opencl --disable-outdev=xv --enable-audiotoolbox --enable-videotoolbox --enable-sdl2 --disable-securetransport --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-x86asm --enable-libx265 --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid --enable-nonfree --enable-libfdk-aac
  libavutil      56. 35.100 / 56. 35.100
  libavcodec     58. 59.101 / 58. 59.101
  libavformat    58. 33.100 / 58. 33.100
  libavdevice    58.  9.100 / 58.  9.100
  libavfilter     7. 61.100 /  7. 61.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100



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Re: Timecode based filenames

Carl Eugen Hoyos-2
Am Di., 28. Apr. 2020 um 17:52 Uhr schrieb Colin Bitterfield
<[hidden email]>:

>
> Question on Timecode Based Filenames:
>
>
> What is required to generate a filename based on timecode.
>
> i.e. filename-start-time_end-time.mov
>
> The % variables don’t seem to be well defined in the documentation.
>
> I have it working with strtime 1 and using %H%M%S type variables.
>
> Is there a reference for the %variables ?
>
> Regards,
>
> Colin
>
> ps read man ffmpeg-formats (and the documentation pages)
>
>
> Command:
>
> gtimeout 62m   /opt/local/bin/ffmpeg -hwaccel videotoolbox -benchmark_all -hide_banner -stats -loglevel error -c dvvideo -pix_fmt 0rgb -capture_raw_data true -f avfoundation -i "ZR25 MC"  -c: copy -f dv pipe: | /opt/local/bin/ffmpeg -i pipe: -hide_banner -c:v dvvideo -c:a:0 pcm_s16le   -strftime 1 -copyts -timecode "00:00:00;00" -increment_tc 1 -reset_timestamps 0 -segment_time 00:05:00  -f segment  “video_%H-%M-%S_production_original.mov" -y

Complete, uncut console output missing, remove hide_banner when asking
for help here
and please use a testcase without the pipe.

I don't know if the C library on macos supports strftime, it works on
Windows, but not mingw.

Carl Eugen
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Re: Timecode based filenames

Colin Bitterfield
Command no pipe full header.

$ /opt/local/bin/ffmpeg -i input.dv  -map 0 -c:v dvvideo -c:a:0 pcm_s16le -strftime 1 -copyts -timecode "00:00:00;00" -increment_tc 1 -reset_timestamps 1 -segment_time 00:01:00  -f segment  "output_%H-%M-%S.mov" -y
ffmpeg started on 2020-04-28 at 20:37:03
Report written to "ffreport.log"
Log level: 32
ffmpeg version 4.2.git Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-librsvg --enable-libtheora --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libsoxr --enable-libspeex --enable-libass --enable-libbluray --enable-lzma --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libfribidi --disable-libjack --disable-libopencore-amrnb --disable-libopencore-amrwb --disable-libxcb --disable-libxcb-shm --disable-libxcb-xfixes --disable-indev=jack --enable-opencl --disable-outdev=xv --enable-audiotoolbox --enable-videotoolbox --enable-sdl2 --disable-securetransport --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-x86asm --enable-libx265 --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid --enable-nonfree --enable-libfdk-aac
  libavutil      56. 35.100 / 56. 35.100
  libavcodec     58. 59.101 / 58. 59.101
  libavformat    58. 33.100 / 58. 33.100
  libavdevice    58.  9.100 / 58.  9.100
  libavfilter     7. 61.100 /  7. 61.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[dv @ 0x7fb16d807600] Estimating duration from bitrate, this may be inaccurate
Input #0, dv, from 'input.dv':
  Metadata:
    timecode        : 00:00:00:00
  Duration: 00:03:37.38, start: 0.000000, bitrate: 28771 kb/s
    Stream #0:0: Video: dvvideo, yuv411p, 720x480 [SAR 8:9 DAR 4:3], 25000 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc
    Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (dvvideo (native) -> dvvideo (native))
  Stream #0:1 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
[segment @ 0x7fb16d00d800] Opening 'output_20-37-03.mov' for writing
Output #0, segment, to 'output_%H-%M-%S.mov':
  Metadata:
    timecode        : 00:00:00;00
    encoder         : Lavf58.33.100
    Stream #0:0: Video: dvvideo, yuv411p, 720x480 [SAR 8:9 DAR 4:3], q=2-31, 200 kb/s, 29.97 fps, 30k tbn, 29.97 tbc
    Metadata:
      encoder         : Lavc58.59.101 dvvideo
    Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    Metadata:
      encoder         : Lavc58.59.101 pcm_s16le
[dvvideo @ 0x7fb16d00f400] Concealing bitstream errorsitrate=N/A speed=13.8x



Output Files:

-rw-r--r--   1 colin  staff  227436803 Apr 28 20:37 output_20-37-03.mov
-rw-r--r--   1 colin  staff  227310381 Apr 28 20:37 output_20-37-08.mov
-rw-r--r--   1 colin  staff  227310385 Apr 28 20:37 output_20-37-13.mov
-rw-r--r--   1 colin  staff  141595633 Apr 28 20:37 output_20-37-18.mov

Attached FFREPORT




Input File:

$ ffprobe input.dv
ffprobe version 4.2.git Copyright (c) 2007-2019 the FFmpeg developers
  built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-librsvg --enable-libtheora --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libsoxr --enable-libspeex --enable-libass --enable-libbluray --enable-lzma --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libfribidi --disable-libjack --disable-libopencore-amrnb --disable-libopencore-amrwb --disable-libxcb --disable-libxcb-shm --disable-libxcb-xfixes --disable-indev=jack --enable-opencl --disable-outdev=xv --enable-audiotoolbox --enable-videotoolbox --enable-sdl2 --disable-securetransport --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-x86asm --enable-libx265 --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid --enable-nonfree --enable-libfdk-aac
  libavutil      56. 35.100 / 56. 35.100
  libavcodec     58. 59.101 / 58. 59.101
  libavformat    58. 33.100 / 58. 33.100
  libavdevice    58.  9.100 / 58.  9.100
  libavfilter     7. 61.100 /  7. 61.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[dv @ 0x7fdf96001a00] Estimating duration from bitrate, this may be inaccurate
Input #0, dv, from 'input.dv':
  Metadata:
    timecode        : 00:00:00:00
  Duration: 00:03:37.38, start: 0.000000, bitrate: 28771 kb/s
    Stream #0:0: Video: dvvideo, yuv411p, 720x480 [SAR 8:9 DAR 4:3], 25000 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc
    Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s


——

STRFTIME(3)              BSD Library Functions Manual              STRFTIME(3)

NAME
     strftime, strftime_l -- format date and time

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <time.h>

     size_t
     strftime(char *restrict s, size_t maxsize, const char *restrict format, const struct tm *restrict timeptr);

     #include <time.h>
     #include <xlocale.h>

     size_t
     strftime_l(char *restrict s, size_t maxsize, const char *restrict format, const struct tm *restrict timeptr,
         locale_t loc);

DESCRIPTION
     The strftime() function formats the information from timeptr into the buffer s, according to the string pointed
     to by format.

     The format string consists of zero or more conversion specifications and ordinary characters.  All ordinary char-
     acters are copied directly into the buffer.  A conversion specification consists of a percent sign ```%''' and
     one other character.

     No more than maxsize characters will be placed into the array.  If the total number of resulting characters,
     including the terminating NUL character, is not more than maxsize, strftime() returns the number of characters in
     the array, not counting the terminating NUL.  Otherwise, zero is returned and the buffer contents are indetermi-
     nate.

     Although the strftime() function uses the current locale, the strftime_l() function may be passed a locale
     directly. See xlocale(3) for more information.

     The conversion specifications are copied to the buffer after expansion as follows:-

     %A    is replaced by national representation of the full weekday name.

     %a    is replaced by national representation of the abbreviated weekday name.

     %B    is replaced by national representation of the full month name.

     %b    is replaced by national representation of the abbreviated month name.

     %C    is replaced by (year / 100) as decimal number; single digits are preceded by a zero.

     %c    is replaced by national representation of time and date.

     %D    is equivalent to ``%m/%d/%y''.

     %d    is replaced by the day of the month as a decimal number (01-31).

     %E* %O*
           POSIX locale extensions.  The sequences %Ec %EC %Ex %EX %Ey %EY %Od %Oe %OH %OI %Om %OM %OS %Ou %OU %OV %Ow
           %OW %Oy are supposed to provide alternate representations.

           Additionally %OB implemented to represent alternative months names (used standalone, without day men-
           tioned).

     %e    is replaced by the day of the month as a decimal number (1-31); single digits are preceded by a blank.

     %F    is equivalent to ``%Y-%m-%d''.

     %G    is replaced by a year as a decimal number with century.  This year is the one that contains the greater
           part of the week (Monday as the first day of the week).

     %g    is replaced by the same year as in ``%G'', but as a decimal number without century (00-99).

     %H    is replaced by the hour (24-hour clock) as a decimal number (00-23).

     %h    the same as %b.

     %I    is replaced by the hour (12-hour clock) as a decimal number (01-12).

     %j    is replaced by the day of the year as a decimal number (001-366).

     %k    is replaced by the hour (24-hour clock) as a decimal number (0-23); single digits are preceded by a blank.

     %l    is replaced by the hour (12-hour clock) as a decimal number (1-12); single digits are preceded by a blank.

     %M    is replaced by the minute as a decimal number (00-59).

     %m    is replaced by the month as a decimal number (01-12).

     %n    is replaced by a newline.

     %O*   the same as %E*.

     %p    is replaced by national representation of either "ante meridiem" (a.m.)  or "post meridiem" (p.m.)  as
           appropriate.

     %R    is equivalent to ``%H:%M''.

     %r    is equivalent to ``%I:%M:%S %p''.

     %S    is replaced by the second as a decimal number (00-60).

     %s    is replaced by the number of seconds since the Epoch, UTC (see mktime(3)).

     %T    is equivalent to ``%H:%M:%S''.

     %t    is replaced by a tab.

     %U    is replaced by the week number of the year (Sunday as the first day of the week) as a decimal number
           (00-53).

     %u    is replaced by the weekday (Monday as the first day of the week) as a decimal number (1-7).

     %V    is replaced by the week number of the year (Monday as the first day of the week) as a decimal number
           (01-53).  If the week containing January 1 has four or more days in the new year, then it is week 1; other-
           wise it is the last week of the previous year, and the next week is week 1.

     %v    is equivalent to ``%e-%b-%Y''.

     %W    is replaced by the week number of the year (Monday as the first day of the week) as a decimal number
           (00-53).

     %w    is replaced by the weekday (Sunday as the first day of the week) as a decimal number (0-6).

     %X    is replaced by national representation of the time.

     %x    is replaced by national representation of the date.

     %Y    is replaced by the year with century as a decimal number.

     %y    is replaced by the year without century as a decimal number (00-99).

     %Z    is replaced by the time zone name.

     %z    is replaced by the time zone offset from UTC; a leading plus sign stands for east of UTC, a minus sign for
           west of UTC, hours and minutes follow with two digits each and no delimiter between them (common form for
           RFC 822 date headers).

     %+    is replaced by national representation of the date and time (the format is similar to that produced by
           date(1)).

     %-*   GNU libc extension.  Do not do any padding when performing numerical outputs.

     %_*   GNU libc extension.  Explicitly specify space for padding.

     %0*   GNU libc extension.  Explicitly specify zero for padding.

     %%    is replaced by `%'.

SEE ALSO
     date(1), printf(1), ctime(3), printf(3), strptime(3), wcsftime(3), xlocale(3)

STANDARDS
     The strftime() function conforms to ISO/IEC 9899:1990 (``ISO C90'') with a lot of extensions including `%C',
     `%D', `%E*', `%e', `%G', `%g', `%h', `%k', `%l', `%n', `%O*', `%R', `%r', `%s', `%T', `%t', `%u', `%V', `%z', and
     `%+'.

     The peculiar week number and year in the replacements of `%G', `%g', and `%V' are defined in ISO 8601: 1988.

BUGS
     There is no conversion specification for the phase of the moon.

     The strftime() function does not correctly handle multibyte characters in the format argument.

BSD                            November 4, 2004                            BSD
(END)
     %-*   GNU libc extension.  Do not do any padding when performing numerical outputs.

     %_*   GNU libc extension.  Explicitly specify space for padding.

     %0*   GNU libc extension.  Explicitly specify zero for padding.

     %%    is replaced by `%'.

SEE ALSO
     date(1), printf(1), ctime(3), printf(3), strptime(3), wcsftime(3), xlocale(3)

STANDARDS
     The strftime() function conforms to ISO/IEC 9899:1990 (``ISO C90'') with a lot of extensions including `%C',
     `%D', `%E*', `%e', `%G', `%g', `%h', `%k', `%l', `%n', `%O*', `%R', `%r', `%s', `%T', `%t', `%u', `%V', `%z', and
     `%+'.

     The peculiar week number and year in the replacements of `%G', `%g', and `%V' are defined in ISO 8601: 1988.

BUGS
     There is no conversion specification for the phase of the moon.

     The strftime() function does not correctly handle multibyte characters in the format argument.

> On Apr 28, 2020, at 9:12 AM, Carl Eugen Hoyos <[hidden email]> wrote:
>
> Am Di., 28. Apr. 2020 um 17:52 Uhr schrieb Colin Bitterfield
> <[hidden email] <mailto:[hidden email]>>:
>>
>> Question on Timecode Based Filenames:
>>
>>
>> What is required to generate a filename based on timecode.
>>
>> i.e. filename-start-time_end-time.mov
>>
>> The % variables don’t seem to be well defined in the documentation.
>>
>> I have it working with strtime 1 and using %H%M%S type variables.
>>
>> Is there a reference for the %variables ?
>>
>> Regards,
>>
>> Colin
>>
>> ps read man ffmpeg-formats (and the documentation pages)
>>
>>
>> Command:
>>
>> gtimeout 62m   /opt/local/bin/ffmpeg -hwaccel videotoolbox -benchmark_all -hide_banner -stats -loglevel error -c dvvideo -pix_fmt 0rgb -capture_raw_data true -f avfoundation -i "ZR25 MC"  -c: copy -f dv pipe: | /opt/local/bin/ffmpeg -i pipe: -hide_banner -c:v dvvideo -c:a:0 pcm_s16le   -strftime 1 -copyts -timecode "00:00:00;00" -increment_tc 1 -reset_timestamps 0 -segment_time 00:05:00  -f segment  “video_%H-%M-%S_production_original.mov" -y
>
> Complete, uncut console output missing, remove hide_banner when asking
> for help here
> and please use a testcase without the pipe.
>
> I don't know if the C library on macos supports strftime, it works on
> Windows, but not mingw.
>
> Carl Eugen
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email] <mailto:[hidden email]>
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user <https://ffmpeg.org/mailman/listinfo/ffmpeg-user>
>
> To unsubscribe, visit link above, or email
> [hidden email] <mailto:[hidden email]> with subject "unsubscribe".

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