[FFmpeg-user] Codec requirements for using concat protocol

Hi everyone, I'm concatenating short video files of the same codec together using the concat protocol (MPEG-TS/H.264). When the docs (https://trac.ffmpeg.org/wiki/Concatenate) say "If you have media files with the same codec and codec parameters you can concatenate them as described ..." - which

Re: [FFmpeg-user] Help, cannot connect to my webcam (message : Could not RenderStream to connect pins, I/O error)

Yes, I could use the webcam to record the screen containing the webcam video.(using another solution, which could probably use ffmpeg inside). Chan Kim -Original Message- From: ffmpeg-user [mailto:ffmpeg-user-boun...@ffmpeg.org] On Behalf Of Roger Pack Sent: Tuesday, May 10, 2016 10:57 P

Re: [FFmpeg-user] The internal ffmpeg rgb=>yuv pipeline and conversion matrices

Peter Rabbitson wrote: -c:v libx264 -colorspace bt709 -pix_fmt yuv444p -profile:v high444 \ -qp 0 -preset:v ultrafast \ -t 5 greenz.mkv FWIW just using -colorspace is not complete. ffmpeg -i greenz.mkv would list 709/unknown/unknown adding -color_primaries b

Re: [FFmpeg-user] IMPORTANT- FFMpeg config Error

On Tue, May 10, 2016 at 19:00:56 +0530, Srinivas Periyasamy wrote: > trying to use KXMovie library to play I don't have much hope for projects which haven't been maintained for two years. But hey, perhaps they're just very stable. > Please help me out in this

Re: [FFmpeg-user] FFMPEG MXF Issue

Hi everyone i'm still having issue, appreciate if anyone can help. thank you in advance -- View this message in context: http://ffmpeg-users.933282.n4.nabble.com/FFMPEG-MXF-Issue-tp4672425p4676002.html Sent from the FFmpeg-users mailing list archive at Nabble.com. ___

Re: [FFmpeg-user] Output video size depending on frame rate while creating video from image list

Thank you Andy! Indeed, after reading more about CRF, it takes motion into account to determine the amount of compression. So I guess that with a very high frame rate it artificially increase the motion speed and then the compression factor as less details should be perceived by the user. -- *Stép

Re: [FFmpeg-user] Help, cannot connect to my webcam (message : Could not RenderStream to connect pins, I/O error)

can other programs use your lifecam? On 5/10/16, 김찬 wrote: > Thanks Carl, > Here is the output. I gave the recording command (ffmpeg -f dshow -i > video="..." test.mp4) while I was streaming the web cam video using LifeCam > player.(displaying the camera on my notebook). > > D:\ffmpeg-20160508-gi

Re: [FFmpeg-user] Help, cannot connect to my webcam (message : Could not RenderStream to connect pins, I/O error)

Thanks Carl, Here is the output. I gave the recording command (ffmpeg -f dshow -i video="..." test.mp4) while I was streaming the web cam video using LifeCam player.(displaying the camera on my notebook). D:\ffmpeg-20160508-git-38eeb85-win64-static\bin >ffmpeg -list_devices true -f dshow -i dumm

Re: [FFmpeg-user] stabilisation

- Original Message - From: "Carl Eugen Hoyos" To: Sent: Tuesday, May 10, 2016 1:13 PM Subject: Re: [FFmpeg-user] stabilisation edouard chalaron xtra.co.nz> writes: when using -vf "deshake" a black frame is coming separating the original frame from the "interpolated" pixels along t

Re: [FFmpeg-user] The internal ffmpeg rgb=>yuv pipeline and conversion matrices

Peter Rabbitson rabbit.us> writes: > On 05/09/2016 08:02 PM, Carl Eugen Hoyos wrote: > > Peter Rabbitson rabbit.us> writes: > > > >> scale=320x240 > > > > Scaling makes very little sense with lossless encoding. > > Could you elaborate? There is no visual difference between high-quality and lo

Re: [FFmpeg-user] stabilisation

edouard chalaron xtra.co.nz> writes: > when using -vf "deshake" a black frame is coming separating the > original frame from the "interpolated" pixels along the boders. Please provide the command line you tested together with the complete, uncut console output. Carl Eugen

[FFmpeg-user] How could I take a snapshot on a live stream with ffmpeg library?

Hello everyone, Sorry to spam you, since I am new and I couldn't find any material on this topic on the Internet. I need to take a snapshot for given live stream, how should I do with ffmpeg library? I know the corresponding command line is: ffmpeg -i http://59.175.153.138/video/s10008-hbws