Reuben Martin: Activity About Popular
Reuben Martin

Member Since:
May 31st 2011
157 Posts
100 posts
Sound drift when streaming
by nadav talmor 3 years ago
Hello I am streaming rtmp with ffmpeg from a camera source that delivers 50fps frame rate to a matrox capture card. until recently I have been using "vMix" in order to capture the video and release it
Re: Sound drift when streaming
by Reuben Martin 3 years ago
Where then is the audio getting re-sampled to 44100 Embedded SDI audio is at 48k.
TimeCode conversion
by Frederico Cengarle 4 years ago
Hi, I need to convert some mov that are in 25 fps to 24 fps. Now the twist, is that I also need to convert the TC start of the file so it represent 25 fps (ex: TC start 25fps 11:24:49:11 becomes 11:53
Re: TimeCode conversion
by Reuben Martin 4 years ago
I think you are erroneously conflating two different aspects of framerate manipulation. "Changing the framerate" implies that the video lasts the same amount of time, but the frames are interpolated t
FFmpeg image sequence to MP4 video with slow frame rate
by Dhirendra Bisht 4 years ago
Hi All, I am trying to convert images to video using FFmpeg. I am using this command ffmpeg -i image-%03d.png -vcodec copy -acodec copy out.mp4 And its works fine. But problem is image sequence is ver
Re: FFmpeg image sequence to MP4 video with slow frame rate
by Reuben Martin 4 years ago
ffmpeg -r 3 -i image-%03d.png -vcodec copy -acodec copy out.mp4
Can ffmpeg create a Prores .mov with an Alpha?
by Chad Gilmour 5 years ago
I know this wasn't possible a few years ago, but I've read it "should" be possible now, but can't seem to find a solution. Has anyone created a prores quicktime with an alpha channel with ffmpeg (or a
Re: Can ffmpeg create a Prores .mov with an Alpha?
by Reuben Martin 4 years ago
There has been a ticket for this feature to be implemented for a while now. https: trac.ffmpeg.org ticket 3707
"end of stream pattern not found" after muxing .h264 and .aac encoded by ffmpeg
by Prathamesh Sathaye 4 years ago
Hi All, Request for your help in a issue I am facing. I have used the below command to extract h.264 video and audio from prores 422 mov file. ffmpeg -i Helicopter.mov -vcodec libx264 -pix_fmt yuv420p
Re: "end of stream pattern not found" after muxing .h264 and .aac encoded by ffmpeg
by Reuben Martin 4 years ago
Just guessing, but you might try actually muxing them to ts with ffmpeg and see what happens. There may be some extra functionality that takes place when the output is known to be ts that doesn't happ
ffmpeg adding white flash frame at end of .mov output file
by Mark Burton 4 years ago
When encoding a .mov file which has both audio and video into an H264 AAC .mov, the resulting file has a white frame at the end. Command: ffmpeg -i inputFile.mov -c:v libx264 -profile:v main -preset m
Re: ffmpeg adding white flash frame at end of .mov output file
by Reuben Martin 4 years ago
You might try to see if it works better in an mp4 container. I don't know if that causes conflict in your workflow, but since you seem to indicate quicktime is being used I've found that it handles mp
Adobe applications and DNx HD MXF
by Steve Cridge 8 years ago
Hi, I wondered if anyone can help tell me if it's possible to import the BM compressed DNx-HD MXF files directly into PPcs5 One of the posts on this site mentions: Media Composer and other editing app
Re: Adobe applications and DNx HD MXF
by Reuben Martin 8 years ago
You can dump raw streams ("essence formats") using a libMXF based tool called mxf2raw. You can then transmux the raw streams into something else with various tools depending on what the desired destin
Capturing to Prores using Multibridge Pro and Media Express
by Nick Braun 8 years ago
I read this in the info about the newest version of media expres: "Apple ProRes, DVCPRO and MJPEG capture and playback support." I updated to Media Express 3.03. I don't see any options anywhere to ca
Re: Capturing to Prores using Multibridge Pro and Media Express
by Reuben Martin 8 years ago
On Linux, Media Express offers 8bit uncompressed AVI, 10bit uncompressed AVI, MJPEG AVI, and DPX. If you want to capture to a different format on linux, you can use something like bmdcapture (https: g
Linux 3.1.0 - Kernel module patch
by Reuben Martin 8 years ago
Patch to build desktopvideo-8.6.1a10 against kernel version 3.1.0. DMA_nBITS_MASK Macros have been depreciated for quite a while now and have finally gotten the boot. Replace DMA_nBITS_MASK with DMA_B
Two DeckLink BlackMagic Cards (Can be Studio, Quad, Intensity, Extreme 3D) and DirectShow Fitlers
by Fernando Tirelli 8 years ago
Hello, i' am having a serious problem with two decklink cards in one pc and a graphedit. I will be very grateful if someone can help with this problem. To reproduce the problem do the following. 1. Pu
Re: Two DeckLink BlackMagic Cards (Can be Studio, Quad, Intensity, Extreme 3D) and DirectShow Fitlers
by Reuben Martin 8 years ago
Well, you described how to reproduce the problem, but never actually described what is going wrong. I'm assuming you are loosing sync Remember that SDI is not always perfect. Frames get lost, time cod
DVI Extender 1080P support
by Tim Volker 8 years ago
We have a number of DVI extender units in our rental stock and have used them to great effect but I have always been puzzled why BMD have not included 1080p resolutions when the units are set to video
Re: DVI Extender 1080P support
by Reuben Martin 8 years ago
Can't say. My company doesn't use any Blackmagic devices for DVI extenders. I was just pointing out that "Video Mode" is only going to support something that is a standardized SDI format, and 1080p60
Cheap software that can use the Decklink SDI card
by Matt Anderson 8 years ago
I am looking for affordable software that I can import a video file into and play out the file using the Decklink SDI card. I know it works with Final Cut and Premiere Pro, but I was hoping there woul
Re: Cheap software that can use the Decklink SDI card
by Reuben Martin 8 years ago
VLC is actually an option IF you build your own from the tip of the development branch. The 1.2.X development branch has added support for decklink. Until 1.2.0 is officially released though, you will
Linux 2.6.39 - Kernel module patch
by Reuben Martin 8 years ago
Patch to build BlackMagic's DesktopVideo-8.0.1rc4 kernel modules against kernel version 2.6.39. (This was the only place that looked even remotely appropriate to place it...) --- DesktopVideo-8.0.1rc4
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