Re: [FFmpeg-user] Bit Depth of PNG Overlay with Alpha channel

2017-11-23 Thread Carl Eugen Hoyos
2017-11-23 23:48 GMT+01:00 Pete Willis : > The param we are using is -filter_complex 'overlay' Please provide the command line you tested together with the complete, uncut console output. Remember that only current FFmpeg git head is supported here. > The information contained in this transmissi

[FFmpeg-user] Bit Depth of PNG Overlay with Alpha channel

2017-11-23 Thread Pete Willis
We have a transparent PNG file with a drop shadow. The drop shadow when overlayed onto a Mov is rendering very dark. Comparing the same file in an NLE (Premiere Pro) the drop shadow opacity is showing as much lighter. I believe the problem is that the NLE is using 32bit colour depth where as F

Re: [FFmpeg-user] why ffmpeg takes lot of cpu?

2017-11-23 Thread Reindl Harald
Am 23.11.2017 um 20:21 schrieb comp4me: i run this command on pc with cpu i5 ffmpeg -i rtsp://x.x.x.x -i 2.264 -preset ultrafast -filter_complex "[0]crop=20:20:20:20[a];[a][1] overlay=0:0" http://127.0.0.1/feed.ffm i see how much this process takes me with "top" command(ubuntu) I see that it

Re: [FFmpeg-user] Can't configure libtheora on latest ffmpeg from git

2017-11-23 Thread Frank Haefemeier
Am Dienstag, den 21.11.2017, 14:54 -0800 schrieb Alan Peevers: > After installing theora using:  > > brew install theora I havn't worked with brew, but in case you install prepared packages with it, properly you must install some kind of 'dev' package with library headers. > I tried: > >

Re: [FFmpeg-user] rtsp mpegts stream not captured with ffplay

2017-11-23 Thread Andrej Filipčič
Hi, Full log attached with today's snapshot. The same behavior. Cheers, Andrej /I am not sure if it is a bug in ffmpeg or not. Any clues? />>//>>/The version I use: />>/ffplay version 3.3.5 / Please test current FFmpeg git head (ideally, with a sane configure line like "--enable-gpl") and if

Re: [FFmpeg-user] Failed installing FFMPEG on CentOS

2017-11-23 Thread Moritz Barsnick
On Thu, Nov 23, 2017 at 10:06:01 +0800, Sook Sin wrote: Please solve this riddle for me: > The 'make' commands shows numerous warnings and an error: [...] > collect2: error: ld returned 1 exit status > make: *** [ffmpeg_g] Error 1 > > Running the ffmpeg commands shows an error: > ffmpeg -i test1

Re: [FFmpeg-user] pan filter confusion

2017-11-23 Thread Moritz Barsnick
On Thu, Nov 23, 2017 at 13:16:27 +0100, Carles Vila wrote: > Could you please have a look at what I'm doing wrong? > Specifically I'm not sure what the [0:1] before the pan does, but it seems > to be necessary. [0:1] is the input stream mapping to the complex filter chain. With this syntax, it ref

Re: [FFmpeg-user] pan filter confusion

2017-11-23 Thread Carles Vila
> How are you testing the output? > > Have you tried > > ffplay -vn proxy_stereo.mp4 > ? > > > Gyan > Hi I'm testing with Quicktime player, but now that you mention it, I've tested with ffplay and a couple of other players with the same result: silent audio I also double checked that the wavef

Re: [FFmpeg-user] pan filter confusion

2017-11-23 Thread Gyan Doshi
On 11/23/2017 5:46 PM, Carles Vila wrote: So far I've been able to create a stereo mp4 file, but the audio is silent. How are you testing the output? Have you tried ffplay -vn proxy_stereo.mp4 ? Gyan ___ ffmpeg-user mailing list ffmpeg-use

Re: [FFmpeg-user] Creat mosaic without loose quality

2017-11-23 Thread DopeLabs
> > On Nov 23, 2017, at 4:23 50AM, Carl Eugen Hoyos wrote: > > 2017-11-23 12:52 GMT+01:00 Marco De Angelis > : > >> C:\S7\ffmpeg\bin\ffmpeg -i C:\S7\FTP_video\1.mp4 -i C:\S7\FTP_video\2.mp4 >> -i C:\S7\FTP_video\3.mp4 -i C:\S7\FTP_video\4.mp4 > >> -filter_complex "nullsrc=size=1920x1080 > >

[FFmpeg-user] pan filter confusion

2017-11-23 Thread Carles Vila
Hi I can't get my head around how the pan filter works, in theory all is clear but in practice I fail with the result. My input is a mov container with 1 ProRes stream and 1 audio stream with 12 channels. I'd like to create a small stereo H264 file with a special combination of those channels: Le

Re: [FFmpeg-user] Creat mosaic without loose quality

2017-11-23 Thread Carl Eugen Hoyos
2017-11-23 12:52 GMT+01:00 Marco De Angelis : > C:\S7\ffmpeg\bin\ffmpeg -i C:\S7\FTP_video\1.mp4 -i C:\S7\FTP_video\2.mp4 > -i C:\S7\FTP_video\3.mp4 -i C:\S7\FTP_video\4.mp4 > -filter_complex "nullsrc=size=1920x1080 This is your original source, the other videos are overlayed on top of it. You c

Re: [FFmpeg-user] Creat mosaic without loose quality

2017-11-23 Thread Marco De Angelis
This is the command C:\S7\ffmpeg\bin\ffmpeg -i C:\S7\FTP_video\1.mp4 -i C:\S7\FTP_video\2.mp4 -i C:\S7\FTP_video\3.mp4 -i C:\S7\FTP_video\4.mp4 -filter_complex "nullsrc=size=1920x1080 [base]; [0:v] setpts=PTS-STARTPTS, scale=960x540 [upperleft]; [1:v] setpts=PTS-STARTPTS, scale=960x540 [upperrig

Re: [FFmpeg-user] Creat mosaic without loose quality

2017-11-23 Thread Carl Eugen Hoyos
2017-11-23 11:41 GMT+01:00 Marco De Angelis : > Hello, I'm pretty new to video processing and I came across this usuful tool. > Using the info I found on the following page I created a mosaic using four > mp4 files > (original frame rate is 60 fps). Please provide the command line you tested toge

[FFmpeg-user] Creat mosaic without loose quality

2017-11-23 Thread Marco De Angelis
Hello, I'm pretty new to video processing and I came across this usuful tool. Using the info I found on the following page I created a mosaic using four mp4 files (original frame rate is 60 fps). Create a mosaic out of several input videos – FFmpeg | | | | | | | | | | | Create a mosa