[FFmpeg-user] drawtext filter box jittery issue

When displaying a frame count number in the drawtext filter, the varying height of the characters can make the text jitter vertically as they count. Its possible to stop this by applying the ‘ascent' value to the y coordinate. However when the drawtext filter contains a box, this element also

[FFmpeg-user] Invisible watermarking filter

Is there or has there ever been any support for an invisible watermarking filter in ffmpeg? Or perhaps there is an external project that supports this? This (now closed) job posting that someone listed a while ago, outlines what I would be looking for:

Re: [FFmpeg-user] Quicktime - Specify a Movie Header timescale of 24000

> On 8 Mar 2018, at 23:37, Mark Burton <mwjbur...@gmail.com> wrote: > > On 8 Mar 2018, at 22:29, Carl Eugen Hoyos <ceffm...@gmail.com > <mailto:ceffm...@gmail.com>> wrote: >> One possibility is that you run "git diff libavformat/movenc.h" to

Re: [FFmpeg-user] Quicktime - Specify a Movie Header timescale of 24000

On 8 Mar 2018, at 22:29, Carl Eugen Hoyos wrote: > One possibility is that you run "git diff libavformat/movenc.h" to verify you > have only changed this one value (this assumes you have originally done > "git clone" and not "curl..."), then run "git commit

Re: [FFmpeg-user] Quicktime - Specify a Movie Header timescale of 24000

On 8 Mar 2018, at 17:21, Carl Eugen Hoyos wrote: > You need a compiler, make and git. Iirc, all three are installed if you > type something like "gcc -v" on the command line (but I assume they > are now installed by brew). Thank you very much! That filled in a few blanks for

Re: [FFmpeg-user] Quicktime - Specify a Movie Header timescale of 24000

On 8 Mar 2018, at 16:38, Carl Eugen Hoyos <ceffm...@gmail.com> wrote: > 2018-03-08 15:57 GMT+01:00, Mark Burton <mwjbur...@gmail.com>: >> >> Understood. A better option would no doubt be the ability to specify this >> value in the same way we can specif

Re: [FFmpeg-user] Quicktime - Specify a Movie Header timescale of 24000

On 8 Mar 2018, at 11:03, Carl Eugen Hoyos wrote: > It is zero as long as nobody confirms that this would fix the issue you see. Understood. A better option would no doubt be the ability to specify this value in the same way we can specify the video_track_timescale value.

Re: [FFmpeg-user] Quicktime - Specify a Movie Header timescale of 24000

On 7 Mar 2018, at 00:45, Mark Burton <mwjbur...@gmail.com> wrote: > Does it help if you edit MOV_TIMESCALE in libavformat/movenc.h? What are the chances that this value could be changed to a much higher and more useful value? Does anyone know why 1000 w

Re: [FFmpeg-user] Quicktime - Specify a Movie Header timescale of 24000

On 7 Mar 2018, at 00:24, Carl Eugen Hoyos wrote: > Could you elaborate a little? > What kind of issues? > > Does it help if you edit MOV_TIMESCALE in libavformat/movenc.h? The files are being used in software (Conformalizer) that seeks to specific points in the Quicktime

[FFmpeg-user] Quicktime - Specify a Movie Header timescale of 24000

When I run my 24fps Quicktime mov files through an FFmpeg transcode they are coming out with a Movie Header timescale of 1000, when the source file has a timescale of 24000. This low timescale value is causing issues in some professional software tools when seeking the file. In my case the

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

The latest nightly of Handbrake includes an option to add the sample group atom as well as the edit list. This is much more successful than the current ffmpeg mux when playing in QT X. Its still ignored in older QT decoders, but certainly this would be an improvement if ffmpeg could follow the

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 1 Jul 2017, at 20:24, Sasi Inguva <isasi-at-google@ffmpeg.org> wrote: >> On Sat, Jul 1, 2017 at 6:56 AM, Mark Burton [via FFmpeg-users] >> How about this for a partial solution - ffmpeg supports the audiotoolbox >> aac encoder on macOS. For the sake of being a

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

> On 28 Jun 2017, at 01:12, Sasi Inguva wrote: > I have been helping Mark test Marton's patch. I looked at the test file Mark > was using to test the sync. There are multiple reasons for audio being > off-sync. > > i) That file doesn't contain a non-zero edit

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 19 Jun 2017, at 22:38, Marton Balint wrote: > Can you measure how many samples are the delay before and after my patch? I'd > rather do some additional testing now, instead committing something that is > only half-correct. I’ve reached out to the developer who was helping

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 16 Jun 2017, at 10:17, ffm...@me.com wrote: > I agree with Mark here. > Followed the issue now for a while and opened a similar (not went into this > deep technical level) issue some time ago. > > I guess it should be marked as a bug and - if possible - should be fixed. > Thanks, Andreas

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

> On 15 Apr 2017, at 13:25, Christian Ebert wrote: > * Marton Balint on Saturday, April 15, 2017 at 12:25:58 +0200 >> On Sat, 15 Apr 2017, Christian Ebert wrote: >>> * Marton Balint on Saturday, April 15, 2017 at 07:55:22 +0200 Last time I checked (a year ago or so),

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

I appreciate I don't fully grasp the complexities or know the full story here, but do you not think its fair to say this should be considered a major ffmpeg bug or issue? It seems clear to me, and others, that the current .mov muxer produces a file which is incompatible with Quicktime itself.

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 26 May 2017, at 12:53, Christian Ebert > wrote: > Yeah, filtering does not add an edit list (apparently the > 'modern' solution): >

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 23 May 2017, at 11:20, Christian Ebert wrote: >> So I looked back at your above -af and realised that the 1024 should >> actually be 2112 which is Apple’s chosen fixed encoding delay. >>

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 15 Apr 2017, at 09:22, Christian Ebert wrote: > Somewhat counterintuitive, but you never know: > > -filter:a aresample=async=1:first_pts=0,asetpts=PTS-STARTPTS+1024 > > combined with the -t incantation. Hi Christian, It seems this issue is not going to garner much

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 9 May 2017, 15:42 +0100, Mark Burton <mwjbur...@gmail.com>, wrote: > > > Do you not see the same behaviour? > > No, unfortunately not. > Can I ask - are you playing back your encoded file on macOS in either > Quicktime Player 7.x or Quicktime Player 10.x? >

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 9 May 2017, at 15:21, Carl Eugen Hoyos wrote: >> Do you not see the same behaviour? > No, unfortunately not. Can I ask - are you playing back your encoded file on macOS in either Quicktime Player 7.x or Quicktime Player 10.x? I don’t believe you will see this unless you

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

> On 9 May 2017, at 15:16, Carl Eugen Hoyos wrote: >> Is this patch likely to be applied in the near future? Thanks. > > The only comment I see above is that the patch does not fix > any issue, so while I haven't looked at it, I consider this more > of an argument against

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 15 Apr 2017, 11:26 +0100, Marton Balint , wrote: > Hmm, a recent fix changed one of the hunk contexts... Could you try this > new attached patch? Is this patch likely to be applied in the near future? Thanks. ___ ffmpeg-user mailing

Re: [FFmpeg-user] sendcmd and drawtext - using more than one in the same filtergraph?

> On 28 Apr 2017, at 16:28, Paul B Mahol wrote: > > You need to use Parsed_drawtext_X instead of drawtext, replace X with > number of filter in filtergraph. > > So if its 3rd filter in filtergraph its number will be 2. Because > lavfi counts from 0. Ah perfect. Many thanks

[FFmpeg-user] sendcmd and drawtext - using more than one in the same filtergraph?

Using a single sendcmd to read text from an external file and command a single drawtext, is working fine: ffmpeg -i input.mov -c:v dnxhd -b:v 115M -pix_fmt yuv422p -vf

[FFmpeg-user] mjpegenc change to optimal huffman coding as default and Quicktime Player 7

This caught me out today, so just as an FYI to anyone else this might affect, the change to enable ‘optimal' huffman coding by default since Sunday 9th April, does cause playback to break in Quicktime Player 7 on macOS. Since Quicktime Player 7 is very old now this is understandable, but for

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 15 Apr 2017, 09:18 +0100, Mark Burton <mwjbur...@gmail.com>, wrote: > On 14 Apr 2017, 23:45 +0100, Carl Eugen Hoyos <ceffm...@gmail.com>, wrote: > > 2017-04-14 23:44 GMT+02:00 Mark Burton <mwjbur...@gmail.com>: > > > I find it hard having to accept an encod

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 15 Apr 2017, 09:22 +0100, Christian Ebert <blacktr...@gmx.net>, wrote: > * Mark Burton on Friday, April 14, 2017 at 22:44:52 +0100 > > > On 14 Apr 2017, at 22:22, Christian Ebert <blacktr...@gmx.net> wrote: > > > > > Also, when you run with

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 14 Apr 2017, 23:45 +0100, Carl Eugen Hoyos <ceffm...@gmail.com>, wrote: > 2017-04-14 23:44 GMT+02:00 Mark Burton <mwjbur...@gmail.com>: > > I find it hard having to accept an encode will always play out of > > sync on certain players. > > Could you elabor

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 15 Apr 2017, 06:55 +0100, Marton Balint <c...@passwd.hu>, wrote: > On Sat, 15 Apr 2017, Carl Eugen Hoyos wrote: > > > 2017-04-14 23:44 GMT+02:00 Mark Burton <mwjbur...@gmail.com>: > > > I find it hard having to accept an encode will always play out

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

> On 14 Apr 2017, at 22:22, Christian Ebert wrote: >>> Also, when you run with -v verbose, you'll see a delay (depends >>> on audio codec), for you case it's probably 1024. Maybe try: >>> >>> -filter:a aresample=first_pts=0,asetpts=PTS-STARTPTS+1024 >>> >>> Especially the

Re: [FFmpeg-user] Create an AAC stream matching the Core Media Audio packet format / priming etc?

On 14 Apr 2017, 17:47 +0100, Christian Ebert <blacktr...@gmx.net>, wrote: > * Mark Burton on Friday, April 14, 2017 at 16:57:06 +0100 > > I appreciate this is a tricky area and there appear to be different ways > > that some encoders create AAC streams with r

Re: [FFmpeg-user] Drawtext - complex expression to show feet+frames

> On 11 Apr 2017, at 22:39, Mark Burton <mwjbur...@gmail.com> wrote: > > One issue I am having is that as the numbers count the vertical position of > the text changes ever so slightly, looks like a judder. I’m guessing this is > due to the character size variations so the

Re: [FFmpeg-user] Drawtext - complex expression to show feet+frames

> On 11 Apr 2017, at 21:51, Mark Burton <mwjbur...@gmail.com> wrote: >> On 11 Apr 2017, at 21:13, Moritz Barsnick <barsn...@gmx.net >> <mailto:barsn...@gmx.net>> wrote: >> I haven't figured out how to format "12+6" as "12+06" though. Go

[FFmpeg-user] Drawtext - complex expression to show feet+frames

New here, hope this is an appropriate question layout... I’ve been trying to learn more about expression evaluation and some of the more complex aspects of controlling drawing text. I’m trying to achieve something which is a bit far fetched, but I’d love to get any help I can and this would be