[FFmpeg-user] Slower Encoding with Threads!

Hello ffmpeg team and users, When using "-thread 16" for encoding videos (x264 and x265) on my dual Intel Xeon X5670 server running centOS 7, I notice a drop in performance when compared to single thread encoding! For example, I'm currently doing an a single-thread x265 encoding for a video and th

Re: [FFmpeg-user] Alpha Channel QT with SubTitles

Carl, Thanks for the frame rate multiplier correction, will make the change. As for the file, I am checking in FCP 7. When alpha type is set to ‘none/ignore’ I see a white background and white text and the drop shadow. When the alpha type is set to ‘straight’, ‘black’, or ‘white’ I don’t see an

Re: [FFmpeg-user] Quicktime reference files

On 1/17/2018 7:18 AM, Carl Eugen Hoyos wrote: 2018-01-04 9:52 GMT+01:00 Kasper Folman : I’m having a hard time working something out with quicktime reference files. I also have struggled with this . The use of quicktime reference files. but it was some time ago . indeed I gave up. I would li

Re: [FFmpeg-user] ffmpeg websocket connection

2018-01-12 5:33 GMT+01:00 kamal shadi : > Does ffmpeg support webrtc protocol to receive live stream? Many (all?) of the necessary capabilities for webrtc, including mulaw, alaw, opus and several video codecs, are implemented within FFmpeg but FFmpeg so far does not implement the whole webrtc sta

Re: [FFmpeg-user] Quicktime reference files

2018-01-04 9:52 GMT+01:00 Kasper Folman : > I’m having a hard time working something out with quicktime reference files. > > A file from one mount point works fine, but not from another. Please provide short (!) samples. Carl Eugen ___ ffmpeg-user mail

Re: [FFmpeg-user] Screen capture is producing crackling noise

2018-01-17 12:57 GMT+01:00 Abeba Tensai : > ffmpeg -y -f avfoundation -video_size 640x480 -pix_fmt yuyv422 -i "1:2" > -c:v h264_videotoolbox -b:v 7500k -c:a aac -b:a 64k -vsync 2 -async 1 > out.mp4 > > produced the file: https://s3.amazonaws.com/testo12/out.mp4 Generally, output files are only u

Re: [FFmpeg-user] Screen capture is producing crackling noise

Yes, the command: > ffmpeg -y -f avfoundation -video_size 640x480 -pix_fmt yuyv422 -i "1:2" -c:v h264_videotoolbox -b:v 7500k -c:a aac -b:a 64k -vsync 2 -async 1 out.mp4 produced the file: https://s3.amazonaws.com/testo12/out.mp4 On Wed, Jan 17, 2018 at 6:37 AM, Carl Eugen Hoyos wrote: > 2018

Re: [FFmpeg-user] Screen capture is producing crackling noise

2018-01-17 12:35 GMT+01:00 Abeba Tensai : > ffmpeg version 3.3.5 Copyright (c) 2000-2017 the FFmpeg developers Is the issue reproducible with current FFmpeg git head? Carl Eugen ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mail

[FFmpeg-user] Screen capture is producing crackling noise

Hi guys, I am using a Mac (High Sierra 10.13.1). Initially, I executed the following command to get the devices index: > ffmpeg -f avfoundation -list_devices true -i "" ffmpeg version 3.3.5 Copyright (c) 2000-2017 the FFmpeg developers built with Apple LLVM version 9.0.0 (clang-900.0.39.2)

Re: [FFmpeg-user] Alpha Channel QT with SubTitles

2018-01-11 22:42 GMT+01:00 Gandharv Bhagat : > I am trying to generate an alpha channel QT, with Apple animation > codec, but the I get output has a white background. How do you test the background? The fact that there is a white background using media players (which in many cases do not support

Re: [FFmpeg-user] best_effort_timestamp_time

2018-01-17 11:15 GMT+01:00 Wolfgang Hugemann : > [avi @ 002eaee0] sample size (1) != block align (2) > Input #0, avi, from 'C:\Temp\___Motorradvideo\20150424_20_0301.avi': > Duration: 00:05:01.00, start: 0.00, bitrate: 437 kb/s Which camera type is this? I ask because I am curious what

Re: [FFmpeg-user] best_effort_timestamp_time

> (Assuming the camera does not use FFmpeg as firmware > which is very unlikely.) > You have a problem here. > The input you are analyzing is not the stream that was > created by the traffic camera but a file created with FFmpeg. > So while there may absolutely be an issue (that we may or > may not