How is the gmtime option used for pts? I want to overlay the time video
frames have been captured onto a video and display the time in a
YYYY-MM-DD HH:MM:SS format. I have succeeded in using the pts option
with flt to display the time in seconds since the start of the video.
ffmpeg -i in.webm -filter_complex
"drawtext=fontfile=/usr/share/fonts/truetype/arial.ttf: text='%{pts
\:flt}': x=100 : y=50 : box=1" -c:a copy out.webm
There is a gmtime option for pts described in the documentation:
pts
The timestamp of the current frame. It can take up to three arguments.
The first argument is the format of the timestamp; it defaults to flt
for seconds as a decimal number with microsecond accuracy; hms stands
for a formatted [-]HH:MM:SS.mmm timestamp with millisecond accuracy.
gmtime stands for the timestamp of the frame formatted as UTC time;
localtime stands for the timestamp of the frame formatted as local
time zone time.
The second argument is an offset added to the timestamp.
This gmtime option does not work for me, when running:
ffmpeg -i in.webm -filter_complex
"drawtext=fontfile=/usr/share/fonts/truetype/arial.ttf: text='%{pts
\:gmtime}': x=100 : y=50 : box=1" -c:a copy out.webm
I get the error: "Invalid format 'gmtime'".
How can the gmtime option be applied to display the time of the video in
YYYY-MM-DD HH:MM:SS format?
I posted this question weeks ago to superuser.com, but did not get a
response on using the pts gmtime argument:
http://superuser.com/q/1013753/483849
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