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Lorenz Martens
Hi all,
first of all I want to wish you a happy new Year!

I have a project to solve within the next week:

Is it possible with ffmpeg to create an image overlay from a given timecode to a given timecode?

Example: I have a 8h video file and want to insert an overlay image from timcode 01:32:20 to 1:53:20 and a different one from 02:03:10 to 02:30:20!

I'm using ubuntu server LTS 10.4 with latest an greatest ffmpeg :D

Any help or hint would be fine.

mit freundlichem Gruß / kind regards
Support-Team

Lorenz Martens

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Re: image Overlay

Stefano Sabatini-2
On date Monday 2012-01-02 13:54:17 +0100, Lorenz Martens encoded:

> Hi all,
> first of all I want to wish you a happy new Year!
>
> I have a project to solve within the next week:
>
> Is it possible with ffmpeg to create an image overlay from a given timecode to a given timecode?
>
> Example: I have a 8h video file and want to insert an overlay image
> from timcode 01:32:20 to 1:53:20 and a different one from 02:03:10
> to 02:30:20!
>
> I'm using ubuntu server LTS 10.4 with latest an greatest ffmpeg :D
>
> Any help or hint would be fine.

Right now you can't do that by using the overlay, you need a
multi-steps process, where you need to split the file, overlay just in
the interested segments and merge again the modified segments, or
create an ad-hoc video to overlay which shows the image only in the
interested intervals.

In order to achieve what you want with overlay, you may need to extend
the filter, support x:y position per-frame evaluation and/or add
support to event-driven reconfiguration, like it is done in drawtext,
patches or a feature request are welcome.
--
ffmpeg-user random tip #19
X11 session recording with ffmpeg:
ffmpeg -f oss -i /dev/audio -f x11grab -s $WIDTHx$HEIGHT -r 5 -i :0.0 \
    x11-session.avi
Use xdpyinfo to get WIDTH and HEIGHT values.
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Re: image Overlay

Alexandre FERRIEUX - RD/SIRP/LAN
On 02/01/2012 14:34, Stefano Sabatini wrote:

> On date Monday 2012-01-02 13:54:17 +0100, Lorenz Martens encoded:
>> Hi all,
>> first of all I want to wish you a happy new Year!
>>
>> I have a project to solve within the next week:
>>
>> Is it possible with ffmpeg to create an image overlay from a given timecode to a given timecode?
>>
>> Example: I have a 8h video file and want to insert an overlay image
>> from timcode 01:32:20 to 1:53:20 and a different one from 02:03:10
>> to 02:30:20!
>>
>> I'm using ubuntu server LTS 10.4 with latest an greatest ffmpeg :D
>>
>> Any help or hint would be fine.
>
> Right now you can't do that by using the overlay, you need a
> multi-steps process, where you need to split the file, overlay just in
> the interested segments and merge again the modified segments, or
> create an ad-hoc video to overlay which shows the image only in the
> interested intervals.
>
> In order to achieve what you want with overlay, you may need to extend
> the filter, support x:y position per-frame evaluation and/or add
> support to event-driven reconfiguration, like it is done in drawtext,
> patches or a feature request are welcome.

A possible alternative to these extensions:

   - allow frames to have a transparent color, or a mask bitmap, usable for padding.

   - create a "sequence" video source that would internally concatenate the decoded sources

Then, the example becomes:

   - Assume S is the original source, OV1 and OV2 the two short sequences

   - let t1, t2, t3 be the durations of the holes outside OV1+OV2

Result is then (liberal syntax, not that of vf, for readability)

  Overlay(
    S,
    Seq(
      Color(transp,t1),
      OffPad(OV1,..,transp),
      Color(transp,t2),
      OffPad(OV2,..,transp),
      Color(transp,t3)
    )
  )

Of course that's not the way current vfs are designed, but it is more modular. Please comment/destroy.

-Alex
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Re: image Overlay

Lorenz Martens
Thanks for the quick resopnse guys,

@Alex: Could you please give a -vf syntax I'm not sure how to convert your liberal syntax to get it to work.
thanks
Lorenz

> A possible alternative to these extensions:
>
>   - allow frames to have a transparent color, or a mask bitmap, usable for padding.
>
>   - create a "sequence" video source that would internally concatenate the decoded sources
>
> Then, the example becomes:
>
>   - Assume S is the original source, OV1 and OV2 the two short sequences
>
>   - let t1, t2, t3 be the durations of the holes outside OV1+OV2
>
> Result is then (liberal syntax, not that of vf, for readability)
>
>  Overlay(
>    S,
>    Seq(
>      Color(transp,t1),
>      OffPad(OV1,..,transp),
>      Color(transp,t2),
>      OffPad(OV2,..,transp),
>      Color(transp,t3)
>    )
>  )
>
> Of course that's not the way current vfs are designed, but it is more modular. Please comment/destroy.
>
> -Alex
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user

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Re: image Overlay

Alexandre FERRIEUX - RD/SIRP/LAN
On 04/01/2012 13:03, Lorenz Martens wrote:
> Thanks for the quick resopnse guys,
>
> @Alex: Could you please give a -vf syntax I'm not sure how to convert your liberal syntax to get it to work.

Nope, it is not implemented, it is an idea for future directions, sorry :}

-Alex

> thanks
> Lorenz
>
>> A possible alternative to these extensions:
>>
>>    - allow frames to have a transparent color, or a mask bitmap, usable for padding.
>>
>>    - create a "sequence" video source that would internally concatenate the decoded sources
>>
>> Then, the example becomes:
>>
>>    - Assume S is the original source, OV1 and OV2 the two short sequences
>>
>>    - let t1, t2, t3 be the durations of the holes outside OV1+OV2
>>
>> Result is then (liberal syntax, not that of vf, for readability)
>>
>>   Overlay(
>>     S,
>>     Seq(
>>       Color(transp,t1),
>>       OffPad(OV1,..,transp),
>>       Color(transp,t2),
>>       OffPad(OV2,..,transp),
>>       Color(transp,t3)
>>     )
>>   )
>>
>> Of course that's not the way current vfs are designed, but it is more modular. Please comment/destroy.
>>
>> -Alex
>> _______________________________________________
>> ffmpeg-user mailing list
>> [hidden email]
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>

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Re: image Overlay

Lorenz Martens
Ah ok, sorry misunderstood that
never the less thanks ...
- Lorenz

Am 04.01.2012 um 13:58 schrieb Alexandre FERRIEUX - RD/SIRP/LAN:

> On 04/01/2012 13:03, Lorenz Martens wrote:
>> Thanks for the quick resopnse guys,
>>
>> @Alex: Could you please give a -vf syntax I'm not sure how to convert your liberal syntax to get it to work.
>
> Nope, it is not implemented, it is an idea for future directions, sorry :}
>
> -Alex
>
>> thanks
>> Lorenz
>>
>>> A possible alternative to these extensions:
>>>
>>>   - allow frames to have a transparent color, or a mask bitmap, usable for padding.
>>>
>>>   - create a "sequence" video source that would internally concatenate the decoded sources
>>>
>>> Then, the example becomes:
>>>
>>>   - Assume S is the original source, OV1 and OV2 the two short sequences
>>>
>>>   - let t1, t2, t3 be the durations of the holes outside OV1+OV2
>>>
>>> Result is then (liberal syntax, not that of vf, for readability)
>>>
>>>  Overlay(
>>>    S,
>>>    Seq(
>>>      Color(transp,t1),
>>>      OffPad(OV1,..,transp),
>>>      Color(transp,t2),
>>>      OffPad(OV2,..,transp),
>>>      Color(transp,t3)
>>>    )
>>>  )
>>>
>>> Of course that's not the way current vfs are designed, but it is more modular. Please comment/destroy.
>>>
>>> -Alex
>>> _______________________________________________
>>> ffmpeg-user mailing list
>>> [hidden email]
>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>
>> _______________________________________________
>> ffmpeg-user mailing list
>> [hidden email]
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>
>
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user

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Re: image Overlay

Phil Rhodes
Has anyone thought that it might be necessary, not to say desirable, to  
write an actual nonlinear editing app at some point?

Quite commonly I see people on this list trying to do some quite  
labyrinthine things with the commandline which in my view would be far  
better done in a UI.

P
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Re: image Overlay

Lorenz Martens
Hi Phil

I think in general you are right, but sometimes customers have Ideas and we have to solve.
In my case they want me to render overlays to parts of an 4+ hour file.

My next idea was to create an overlay video file ( same length as main file ) with transparent Images and overlay images.
But the next problem is coming up when i try to create an video file with transparency.


> Has anyone thought that it might be necessary, not to say desirable, to  
> write an actual nonlinear editing app at some point?
>
> Quite commonly I see people on this list trying to do some quite  
> labyrinthine things with the commandline which in my view would be far  
> better done in a UI.
>
> P

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creating a transparent Video from PNG or Gif files

Lorenz Martens
Hi all,

I have another question: I have tried to create a video file from images which works fine, but the transparency is lost during conversion.
I want to use the created file as overlay for the main video.

So is it possible to create an transparent Video with ffmpeg?
Has anybody done something like that ? how ?

thanks
lorenz
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Re: creating a transparent Video from PNG or Gif files

Carl Eugen Hoyos
Lorenz Martens <lorenz.martens <at> sogidia.com> writes:

> So is it possible to create an transparent Video with ffmpeg?

Yes.

Seriously: You have to provide information about what you tried (command line)
and how it failed (complete, uncut console output) if you need help. Without it,
it is very, very difficult to answer your question (for example "image" is not a
very exact description and "PNG or Gif" does not make it much easier).

Please do not break threads, it is considered rude here, Carl Eugen

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Re: creating a transparent Video from PNG or Gif files

Lorenz Martens
ok so lets get a little bit more detailed.

1. I have created an image with :

        convert -size 640x480 -background transparent -fill blue label:Lorenz label1-0.gif

        that is creating an gif file with transparent background what is fine!
2. ffmpeg -loop 1 -s 4cif -f image2 -i label1-0.gif -r 25 -vframes 250 -vcodec rawvideo -an test.mov

        (I found some information that mov with rawvideo inside will support transparency )

        Output:

        ffmpeg version N-36427-g15b219f, Copyright (c) 2000-2012 the FFmpeg developers
          built on Jan  4 2012 09:11:15 with gcc 4.4.3
          configuration: --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib --shlibdir=/usr/lib --enable-pthreads --enable-shared --enable-avfilter --disable-static --enable-libmp3lame --enable-libxvid --enable-libx264 --enable-postproc --enable-shared --enable-libdc1394 --enable-libtheora --enable-libschroedinger --enable-gpl --enable-decoder=aac --enable-encoder=aac --extra-ldflags=-lpng
          libavutil      51. 34.100 / 51. 34.100
          libavcodec     53. 50.100 / 53. 50.100
          libavformat    53. 29.100 / 53. 29.100
          libavdevice    53.  4.100 / 53.  4.100
          libavfilter     2. 57.101 /  2. 57.101
          libswscale      2.  1.100 /  2.  1.100
          libswresample   0.  5.100 /  0.  5.100
          libpostproc    51.  2.100 / 51.  2.100
        [image2 @ 0x85f3c60] max_analyze_duration 5000000 reached at 5000000
        Input #0, image2, from 'label1-0.gif':
          Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
            Stream #0:0: Video: gif, pal8, 640x480, 25 fps, 25 tbr, 25 tbn, 25 tbc
        [buffer @ 0x85f4300] w:640 h:480 pixfmt:pal8 tb:1/1000000 sar:0/1 sws_param:
        Output #0, mov, to 'test.mov':
          Metadata:
            encoder         : Lavf53.29.100
            Stream #0:0: Video: rawvideo (raw  / 0x20776172), pal8, 640x480, q=2-31, 200 kb/s, 25 tbn, 25 tbc
        Stream mapping:
          Stream #0:0 -> #0:0 (gif -> rawvideo)
        Press [q] to stop, [?] for help
        frame=  250 fps=187 q=0.0 Lsize=   75251kB time=00:00:10.00 bitrate=61645.4kbits/s    
        video:75250kB audio:0kB global headers:0kB muxing overhead 0.000929%

        after that I try to overlay the mov file to main video with :

4. ffmpeg -i origin.stream_0.flv -sameq -ar 44100 -vf "movie=test.mov [logo];[in][logo] overlay=10:10 [out]" output.flv

        Output :

        ffmpeg version N-36427-g15b219f, Copyright (c) 2000-2012 the FFmpeg developers
          built on Jan  4 2012 09:11:15 with gcc 4.4.3
          configuration: --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib --shlibdir=/usr/lib --enable-pthreads --enable-shared --enable-avfilter --disable-static --enable-libmp3lame --enable-libxvid --enable-libx264 --enable-postproc --enable-shared --enable-libdc1394 --enable-libtheora --enable-libschroedinger --enable-gpl --enable-decoder=aac --enable-encoder=aac --extra-ldflags=-lpng
          libavutil      51. 34.100 / 51. 34.100
          libavcodec     53. 50.100 / 53. 50.100
          libavformat    53. 29.100 / 53. 29.100
          libavdevice    53.  4.100 / 53.  4.100
          libavfilter     2. 57.101 /  2. 57.101
          libswscale      2.  1.100 /  2.  1.100
          libswresample   0.  5.100 /  0.  5.100
          libpostproc    51.  2.100 / 51.  2.100
        Input #0, flv, from 'origin.stream_0.flv':
          Metadata:
            creationdate    : Fr Dez 9 10:34:32
          Duration: 00:15:10.96, start: 0.005000, bitrate: 948 kb/s
            Stream #0:0: Video: h264 (High), yuv420p, 720x576, 25 tbr, 1k tbn, 50 tbc
            Stream #0:1: Audio: aac, 48000 Hz, stereo, s16
        File 'output.flv' already exists. Overwrite ? [y/N] y
        w:720 h:576 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
        [movie @ 0x8623400] seek_point:0 format_name:(null) file_name:test.mov stream_index:0
        [overlay @ 0x8741860] auto-inserting filter 'auto-inserted scale 0' between the filter 'Parsed_movie_0' and the filter 'Parsed_overlay_1'
        [scale @ 0x8619980] w:640 h:480 fmt:pal8 -> w:640 h:480 fmt:yuva420p flags:0x4
        [overlay @ 0x8741860] main w:720 h:576 fmt:yuv420p overlay x:10 y:10 w:640 h:480 fmt:yuva420p
        [overlay @ 0x8741860] main_tb:1/1000000 overlay_tb:1/25 -> tb:1/1000000 exact:1
        Output #0, flv, to 'output.flv':
          Metadata:
            creationdate    : Fr Dez 9 10:34:32
            encoder         : Lavf53.29.100
            Stream #0:0: Video: flv1 ([2][0][0][0] / 0x0002), yuv420p, 720x576, q=2-31, 200 kb/s, 1k tbn, 25 tbc
            Stream #0:1: Audio: mp3 ([2][0][0][0] / 0x0002), 44100 Hz, stereo, s16, 128 kb/s
        Stream mapping:
          Stream #0:0 -> #0:0 (h264 -> flv)
          Stream #0:1 -> #0:1 (aac -> libmp3lame)
        Press [q] to stop, [?] for help
        frame=22774 fps= 84 q=0.0 Lsize=  141985kB time=00:15:11.02 bitrate=1276.7kbits/s    
        video:116070kB audio:25013kB global headers:0kB muxing overhead 0.638709%


All that seems to be fine, but in the output file I see a back overlay and not a transparent one as I had expected :(

greetz

lorenz



Am 05.01.2012 um 12:27 schrieb Carl Eugen Hoyos:

> Lorenz Martens <lorenz.martens <at> sogidia.com> writes:
>
>> So is it possible to create an transparent Video with ffmpeg?
>
> Yes.
>
> Seriously: You have to provide information about what you tried (command line)
> and how it failed (complete, uncut console output) if you need help. Without it,
> it is very, very difficult to answer your question (for example "image" is not a
> very exact description and "PNG or Gif" does not make it much easier).
>
> Please do not break threads, it is considered rude here, Carl Eugen
>
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user

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Re: image Overlay

Icarus Alive
In reply to this post by Phil Rhodes
On Wed, Jan 4, 2012 at 8:52 PM, Phil Rhodes <[hidden email]>wrote:

> Has anyone thought that it might be necessary, not to say desirable, to
> write an actual nonlinear editing app at some point?
>
> Quite commonly I see people on this list trying to do some quite
> labyrinthine things with the commandline which in my view would be far
> better done in a UI.
>

That's probably because people are looking for a uber-cheap (nearly) Live
Broadcast System, which does have many non-linear edit capabilities. AFAIK,
such capabilities do not exist in the FOSS domain.
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Re: creating a transparent Video from PNG or Gif files

Carl Eugen Hoyos
In reply to this post by Lorenz Martens
Lorenz Martens <lorenz.martens <at> sogidia.com> writes:

> that is creating an gif file with transparent background what is fine!
> 2. ffmpeg -loop 1 -s 4cif -f image2 -i label1-0.gif -r 25 -vframes 250 -vcodec
> rawvideo -an test.mov

-pix_fmt pal8 -vcodec rawvideo -f mov currently does not support transparency;-(

Please try
ffmpeg -loop 1 -s 4cif -i label1-0.gif -r 25 -vframes 250 -vcodec png -pix_fmt
bgra test.mov

Please do not top-post here, it is considered rude, Carl Eugen

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Re: creating a transparent Video from PNG or Gif files

Lorenz Martens
thanks a million
that helped me a lot!

kind regards
Lorenz

Am 05.01.2012 um 20:27 schrieb Carl Eugen Hoyos:

> Please try
> ffmpeg -loop 1 -s 4cif -i label1-0.gif -r 25 -vframes 250 -vcodec png -pix_fmt
> bgra test.mov

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Re: creating a transparent Video from PNG or Gif files

srakesh
I am facing the similar problem and I couldn't get same output that you get. Please help:

This is what I have done so far:

Command to create a transparent PNG image:

convert -size 640x480 -background transparent -fill blue \
-gravity South label:ROCK image1-0.png

Command to create a transparent video:

ffmpeg -loop 1 -f image2 -i image1-0.png -r 20 -vframes 100 \
-vcodec png -pix_fmt bgra mov-1.mov
(as per this post) - I expect this video to be a transparent video.

Command to overlay a video with another:

ffmpeg -i final-video.mov -sameq -ar 44100 \
-vf "movie=mov-1.mov [logo];[in][logo] overlay=0:0 [out]" \
-strict experimental final-video.mov

Above commands works perfect and I have not faced any problem, but I don't get what I expect which is kinda watermarking effect, I want mov-1.mov to be transparent with final-video.mov.

Please help.
Lorenz Martens wrote
thanks a million
that helped me a lot!

kind regards
Lorenz

Am 05.01.2012 um 20:27 schrieb Carl Eugen Hoyos:

> Please try
> ffmpeg -loop 1 -s 4cif -i label1-0.gif -r 25 -vframes 250 -vcodec png -pix_fmt
> bgra test.mov

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Lorenz Martens wrote
thanks a million
that helped me a lot!

kind regards
Lorenz

Am 05.01.2012 um 20:27 schrieb Carl Eugen Hoyos:

> Please try
> ffmpeg -loop 1 -s 4cif -i label1-0.gif -r 25 -vframes 250 -vcodec png -pix_fmt
> bgra test.mov

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Lorenz Martens wrote
thanks a million
that helped me a lot!

kind regards
Lorenz

Am 05.01.2012 um 20:27 schrieb Carl Eugen Hoyos:

> Please try
> ffmpeg -loop 1 -s 4cif -i label1-0.gif -r 25 -vframes 250 -vcodec png -pix_fmt
> bgra test.mov

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