[FFmpeg-user] How to silently ignore inexistent inputs

Hi, I would like to generate a mosaic video from multiple RTMP streams. I have a working ffmpeg CMD starting with the list of 25-30 online streams: ffmpeg -i rtmp://server.com/stream1 -i rtmp://server.com/stream2 … -i rtmp://server.com/stream30 THE_REST_IS_OMMITTED This command works well o

[FFmpeg-user] Remove 'Annotation' from Quicktime output

Hi, I am outputting Quicktime Prores files and ffmpeg is inserting an 'Annotation' into the file, where other applications do not insert any. Here's how you see it. Open the file in Quicktime, Show Movie Properties, and you can see the Annotation 'Software - Lavf56.25.101' which has been inserte

Re: [FFmpeg-user] subtitles - visual alignment offset?

Thanks, I thought *MarginV* might be the flag I'm after, but it's not being recognized as a valid option. Saw a user submitted some new functionality, but doesn't look like its in build 2.6.1 w/ libbass enabled. [FFmpeg-devel] Adding Force Style option in Subtitles Filter

Re: [FFmpeg-user] ffmpeg livestreaming with subtitles

Sorry. I am new and I don't know much about this. I am using VLC player and it can support subtitles. I did not mean to use "-f mpegts" as the output format. That was an example only. I meant to ask which format I should use in ffmpeg command line to support subtitle livestreaming. Thanks.

Re: [FFmpeg-user] Input 5.1 DTS, output 2.0 MP3: Atrocious Quality

Moritz Barsnick wrote: And is LFE really ignored when downmixing?) In Dolby and AAC specs it is excluded and there isn't any way for the metadata to include it. Of course players/ffmpeg may do whatever they want. IIRC the ITU 5.1 spec also shows how to include it (10db analogue boost for movie

Re: [FFmpeg-user] Getting precise start time from wall-clock for capture

> > I see the timestamp of the first frame "reset" to 0 - is that what you > mean with "normalize"? > Here's what seems to have worked for me: ffmpeg -f v4l2 -framerate 60 -video_size 1920x1080 -ts mono2abs -i /dev/video-static -r 2997/100 -f matroska -c:v nvenc -b:v 25000k -minrate 25000k -maxra

Re: [FFmpeg-user] Getting precise start time from wall-clock for capture

On Mon, May 18, 2015 at 18:38:18 +0200, Nicolas George wrote: > As you can see, this is the monotonic clock (and my uptime here is 16 days), > but lavd can convert for you: > > http://ffmpeg.org/ffmpeg-devices.html#video4linux2_002c-v4l2 I tried that, because I wanted to answer the question as we

Re: [FFmpeg-user] ffmpeg livestreaming with subtitles

JamesW2015 ffmpeg.org> writes: > I have recently asked a question on ffmpeg livestreaming > with subtitles > > in ffmpeg developer forum Unrelated: You can call the Gusari forum FFmpeg but please do not call it a developer forum. > ffmpe

Re: [FFmpeg-user] Some problems of ffmpeg

pkest qq.com> writes: > I'm through ffmpeg command line for video > transcoding when met some problems Please also post at least the first 50 lines of console output and please try again to explain what goes wrong, I did not understand. Carl Eugen ___

Re: [FFmpeg-user] Getting precise start time from wall-clock for capture

Fantastic Nicolas, thanks so much! This is exactly what I needed. Arthur > ffprobe -i /dev/video0 -of compact -show_packets > [...] > > packet|codec_type=video|stream_index=0|pts=1392045174616|pts_time=1392045.174616|... > > As you can see, this is the monotonic clock (and my uptime here is 16 >

Re: [FFmpeg-user] Increasing the decoding speed of yuv444p h.264 files

On Mon, May 18, 2015 at 9:48 AM, Claudiu Rad wrote: > On 5/18/2015 7:22 PM, Yan Li wrote: >> - yuv444p.mkv (496 Mb/s): decoded at 55 fps >> - yuv420p.mkv (336 Mb/s): decoded at 92 fps >> >> (I/O is not the bottleneck here. Four threads are used.) > sorry to question, but: > are you really sure

Re: [FFmpeg-user] error when compiling ffmpeg

Am 18.05.2015 um 00:36 schrieb Kelly Philp: Hello I have an error when compiling ffmpeg this the error: gcc is unable to create an executable file. If gcc is a cross-compiler, use the --enable-cross-compile option. Only do this if you know what cross compiling means. C compiler test failed at

[FFmpeg-user] Some problems of ffmpeg

hello! I'm through ffmpeg command line for video transcoding when met some problems, the question has bothered me for a long time, hope to get some answers from you. The command is: ffmpeg -y -i 118519.mp4 -profile:v baseline -level 3.0 -map_metadata -1 -c:a ac3 -b:a 32k -ar 44100 -c:v libx264

[FFmpeg-user] error when compiling ffmpeg

Hello I have an error when compiling ffmpeg this the error: gcc is unable to create an executable file. If gcc is a cross-compiler, use the --enable-cross-compile option. Only do this if you know what cross compiling means. C compiler test failed attached config.log

Re: [FFmpeg-user] Input 5.1 DTS, output 2.0 MP3: Atrocious Quality

> To: ffmpeg-user@ffmpeg.org > From: ceho...@ag.or.at > Date: Mon, 18 May 2015 08:48:32 + > Subject: Re: [FFmpeg-user] Input 5.1 DTS, output 2.0 MP3: Atrocious Quality > > John L hotmail.com> writes: > > > > Please test the following: > > > $ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2

Re: [FFmpeg-user] Increasing the decoding speed of yuv444p h.264 files

On 5/18/2015 7:22 PM, Yan Li wrote: I've done some more tests. Input file src.flv is in yuv444p with 48 fps. I use the following commands to generate two lossless test files: 1: ffmpeg -i src.flv -c:v libx264 -qp 0 -preset ultrafast -an yuv444p.mkv 2: ffmpeg -i src.flv -c:v libx264 -qp 0 -preset

Re: [FFmpeg-user] Getting precise start time from wall-clock for capture

Le nonidi 29 floréal, an CCXXIII, Arthur Wait a écrit : > Apologies for hijacking the thread (though I'm not clear as to what in > particular I did in that regard--I started the thread). No real harm done, ans sorry for the harsh tone. Your initial message has this: >>> In-Reply-To: >>> That m

Re: [FFmpeg-user] Increasing the decoding speed of yuv444p h.264 files

On Mon, May 18, 2015 at 2:00 AM, Carl Eugen Hoyos wrote: > Yan Li gmail.com> writes: > >> 2. I want to archive the files in yuv444p. Is there >> any option that can make ffplay play these files >> faster? I don't mind losing replay quality for now, >> but I do need to keep yuv444p files. > > Plea

Re: [FFmpeg-user] Getting precise start time from wall-clock for capture

Thanks Nicolas. > Please remember to follow the mailing list's netiquette, > in particular not hijacking threads (too late for that this time) > but all of it. Apologies for hijacking the thread (though I'm not clear as to what in particular I did in that regard--I started the thread). > You did

[FFmpeg-user] ffmpeg livestreaming with subtitles

Hi, I am a new ffmpeg user. I like it very much. I got a subtitle livestreaming problem though. Basically, I like to livestream a customized subtitles together with audio/video mp4 file. The subtitle track has to be a separate one (cannot be hardcoded or burned into the video data. I know how to

Re: [FFmpeg-user] Integration of ffmpeg with Haswell

Hello , Thanks for explanation , I would certainly test the speed enhancement for my case before paying for the license . Thanks and Regards , Shiwnai > Date: Mon, 18 May 2015 17:19:22 +0200 > From: barsn...@gmx.net > To: ffmpeg-user@ffmpeg.org > Subject: Re: [FFmpeg-user] Integration of ffmpeg

Re: [FFmpeg-user] Integration of ffmpeg with Haswell

On Mon, May 18, 2015 at 15:07:03 +, Shiwani Agrawal wrote: > Thanks for helping me out in this issue , just want to clarify in the > end , does it mean that if we integrate ffmpeg with the media SDK it > increases the speed (or Quality) of transcoding process by processor > ? If yes , why ? T

Re: [FFmpeg-user] Integration of ffmpeg with Haswell

Hello , Thanks for helping me out in this issue , just want to clarify in the end , does it mean that if we integrate ffmpeg with the media SDK it increases the speed (or Quality) of transcoding process by processor ? If yes , why ? Thanks and Regards Shiwani > Date: Mon, 18 May 2015 12:53:1

Re: [FFmpeg-user] Query

[Your subject doesn't say very much. That's not helpful.] On Mon, May 18, 2015 at 16:59:35 +0530, Hardik Kanakia wrote: > I have 6 separate channels (5.1) and separate video file which needs to be > merged into 1 file $ ffmpeg -i videofile -i audiofile -c copy outfile.mkv Or are you saying you

[FFmpeg-user] Query

Hi, Need help: I have 6 separate channels (5.1) and separate video file which needs to be merged into 1 file Could you please help me with the command as I am very new to the ffmpeg world Regards, Hardik Kanakia +91 93204 89772 ___ ffmpeg-user maili

Re: [FFmpeg-user] Getting precise start time from wall-clock for capture

Le nonidi 29 floréal, an CCXXIII, Arthur Wait a écrit : > I'm using FFMPEG to record video from several cameras attached to several > networked computers. The computers' clocks are all synced. I'd like to be > able to get a precise date/time for the first captured frame All captured frames should

Re: [FFmpeg-user] Integration of ffmpeg with Haswell

On Mon, May 18, 2015 at 12:43:12 +0200, Moritz Barsnick wrote: > Actually, my bad. Support is already integrated into ffmpeg. It appears > that, at the presence of the Media SDK (libmfx, mfx/mfxvideo.h), the > qsv encoders and decoders are built. You will need the Media SDK, and > you have to build

Re: [FFmpeg-user] HD > SD Down-Convert Prores Color

Kevin Wells hotmail.co.uk> writes: > This does not suffer from the issue, but the colours look slightly off > > ffmpeg -i /Users/kev/Movies/HD_BARS.mov -vf scale=720:576 > -vcodec v210 -an out.mov Please test the following, sorry for not realising this earlier: $ ffmpeg -i HD_BARS.mov -s pal -

Re: [FFmpeg-user] Integration of ffmpeg with Haswell

On Mon, May 18, 2015 at 12:10:47 +0200, Moritz Barsnick wrote: > If you really have the need for testing the hardware acceleration, I > believe you must google your way through those paths of integrating. > Otherwise, just use plain ffmpeg. Actually, my bad. Support is already integrated into ffmp

Re: [FFmpeg-user] Integration of ffmpeg with Haswell

Hi Shiwani, On Mon, May 18, 2015 at 01:59:04 +, Shiwani Agrawal wrote: > what I am not getting is the need for installing intel media SDK and > then integrating ffmpeg with it . Can we install ffmpeg directly > without having installed intel media SDK ?. Yes, sure you can install ffmpeg witho

Re: [FFmpeg-user] Text on multiple lines

Ok I'll try again and let you know. Thanks. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user

Re: [FFmpeg-user] Text on multiple lines

On Mon, May 18, 2015 at 11:53:04 +0200, Moritz Barsnick wrote: > On Mon, May 18, 2015 at 11:49:04 +0200, lorenzo angeli wrote: > > I'm not sure how to break a line (being just text ), rather than with \r or > > \n. > > I've been trying all sort of thing but without success. Wouldn't be > > possible

Re: [FFmpeg-user] Text on multiple lines

On Mon, May 18, 2015 at 11:49:04 +0200, lorenzo angeli wrote: > I'm not sure how to break a line (being just text ), rather than with \r or > \n. > I've been trying all sort of thing but without success. Wouldn't be > possible to have the draw text able to understand these common delimiters? Pytho

Re: [FFmpeg-user] Text on multiple lines

Sorry did inserted again the previous reply. Damn mobile. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user

Re: [FFmpeg-user] Increasing the decoding speed of yuv444p h.264 files

On Mon, May 18, 2015 at 09:00:36 +, Carl Eugen Hoyos wrote: > Iirc, there is a x264 option that makes the output > file decode faster. Indeed: "--tune fastdecode", which maps to ffmpeg's libx264's "-tune fastdecode" (Note that using "-preset" will change some of those settings additionally.

Re: [FFmpeg-user] Text on multiple lines

I'm not sure how to break a line (being just text ), rather than with \r or \n. I've been trying all sort of thing but without success. Wouldn't be possible to have the draw text able to understand these common delimiters? On 18 May 2015 11:43, "Carl Eugen Hoyos" wrote: > lorenzo angeli efestola

Re: [FFmpeg-user] Text on multiple lines

lorenzo angeli efestolab.uk> writes: > In a way yes(works pressing enter in the command line) . > I need to find a way to do it programmatically from python. So python lacks string concatenation or does it not know the newline character? Carl Eugen ___

Re: [FFmpeg-user] Text on multiple lines

Hi Carl, In a way yes(works pressing enter in the command line) . I need to find a way to do it programmatically from python. Ta. L. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user

Re: [FFmpeg-user] Text on multiple lines

lorenzo angeli efestolab.uk> writes: > Sorry , no way then to tell ffmpeg to break the line somehow ? I thought we had solved this issue? Carl Eugen ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user

Re: [FFmpeg-user] Input 5.1 DTS, output 2.0 MP3: Atrocious Quality

John L wrote: Please test the following: $ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 out.ac3 $ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 out.mp3 $ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 -acodec pcm_f32le out.wav I ran all three as requested, including '-loglevel debug'. All t

Re: [FFmpeg-user] H264 IP-camera dump causes wrong duration/bitrate

しらせ　けんじ shirase.tk> writes: > I got H264 livestream dump from my IP-camera with ffmpeg. > The movies get shorter than real time in night time, > although the length is correct in day time. Is the issue also reproducible if you encode instead of remuxing? $ ffmpeg -vcodec mpeg4 -qscale 2 .

Re: [FFmpeg-user] Text on multiple lines

Sorry , no way then to tell ffmpeg to break the line somehow ? Cheers. L. -- --- Efesto Lab LTD, Chancery Station House, 31-33 High Holborn, London WC1V 6AX

Re: [FFmpeg-user] Increasing the decoding speed of yuv444p h.264 files

Yan Li gmail.com> writes: > 2. I want to archive the files in yuv444p. Is there > any option that can make ffplay play these files > faster? I don't mind losing replay quality for now, > but I do need to keep yuv444p files. Please test and report, I would expect that different encoding optio

Re: [FFmpeg-user] Input 5.1 DTS, output 2.0 MP3: Atrocious Quality

John L hotmail.com> writes: > > Please test the following: > > $ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 out.ac3 > > $ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 out.mp3 > > $ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 > > -acodec pcm_f32le out.wav > > I ran all three as requeste

[FFmpeg-user] H264 IP-camera dump causes wrong duration/bitrate

I got H264 livestream dump from my IP-camera with ffmpeg. The movies get shorter than real time in night time, although the length is correct in day time. The command line I did is below. I used segment function with segment time = 60. So, I expect the duration of each mp4 file is about 60 seco