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I want to add timestamp of current played time to a video, so I use this:
ffmpeg -i video.mkv -filter_complex "drawtext=fontfile=/Library/Fonts/Arial.ttf:
text='timestamp: %{pts \: hms}': x=5: y=5: fontsize=16:
[email protected]: box=1: [email protected]" -c:a copy -c:v libx264 -map 0 output.mkv
This comes out that the timestamp was in hh:mm:ss:mm format, but I want it in hh:mm:ss format. So how can I achieve this goal?
Use
text='timestamp \: %{pts\:gmtime\:0\:%H\\\:%M\\\:%S}'
[Parsed_drawtext_0 @ 0x7fe6e840fd40] Could not load font "%M\": cannot open resource and [AVFilterGraph @ 0x7fe6e8708020] Error initializing filter 'drawtext' with args 'fontfile ***'
Jul 13, 2017 at 8:19
text='timestamp \: %{pts\:gmtime\:0\:%H %M %S}', It seems that \: between H M and S is not allowed. So the ":" has not escaped. I'm wondering how to escape ":". Thanks a lot!
Jul 13, 2017 at 8:46
"...:text=%{pts\\\:hms}" as an example for escaping parameters. I already had to escape single quote character using this: set fileE (echo "$file" | sed 's|\'|\\\\\\\\\\\\\\\'|'), so I would say keep adding slashes carefully until it works interpreted as a literal and not a filter or function parameter/argument separator.
In order to draw Timestamp: 01:25., you should specify this one to (feed) ffmpeg:
drawtext = text = 'Timestamp\: %{pts\:gmtime\:0\:%M\\\:%S}.'
If you specify this one to (feed) ffmpeg:
drawtext = text = '%{pts\:gmtime\:0\:%M\\:%S}'
, it gives Unterminated %{} near '{pts:gmtime:0:%M\' error.
bashBut if you're using bash-like shell and a weak quote, "......", to feed it,
\\ is escaped to \, and
\: is not escaped but remains without any changes because \: is not an escape sequence.
So it should be:
-filter_complex "drawtext = text = '%{pts\:gmtime\:0\:%M\\\\\:%S}'"
i.e. bash's "\\\\\:" for ffmpeg's \\\: for getting a single character : displayed.
If you only want to apply one or more filters to one video stream (e.g, drawtext), you can use -vf instead of using --filter_complex. The latter is reserved for applying filters on multiple streams.
