Search found 62 matches

by roderrooder
Wed Jan 23, 2019 10:16 pm
Forum: Usage
Topic: How to preserve an mp4's audio start_time when passing through an audio filter?
Replies: 1
Views: 276

Re: How to preserve an mp4's audio start_time when passing through an audio filter?

I'm not sure how one would preserve this automatically but you could easily insert delay with asetpts or adelay: https://www.ffmpeg.org/ffmpeg-all.html#setpts_002c-asetpts https://www.ffmpeg.org/ffmpeg-all.html#adelay I suppose you could write a command that probes the file, assigns the original sta...
by roderrooder
Wed Jan 23, 2019 10:11 pm
Forum: Usage
Topic: Can ffmpeg create a (fancy) slideshow video?
Replies: 1
Views: 277

Re: Can ffmpeg create a (fancy) slideshow video?

FFmpeg in conjunction with a good console could definitely do something like this.

However... at least in my case, it would take probably just as long to write the command as it would to simply use a video editor. But then again the command would be reusable in the future...
by roderrooder
Wed Jan 23, 2019 9:57 pm
Forum: Usage
Topic: audio video not syncing
Replies: 7
Views: 741

Re: audio video not syncing

You should be able to use -map_metadata:
Image

All documentation can be found via this link:
https://www.ffmpeg.org/ffmpeg-all.html
by roderrooder
Mon Jan 14, 2019 6:00 pm
Forum: Usage
Topic: audio video not syncing
Replies: 7
Views: 741

Re: audio video not syncing

You'll probably just have to go with using adelay: ffmpeg -re -i udp://224.2.2.8:1008 -map 0:p:40 -vcodec mpeg2video -s 720x576 -r 25 -flags cgop+ilme -sc_threshold 1000000000 -b:v 2M -minrate:v 2M -maxrate:v 2M -bufsize:v 1.4M -acodec mp2 -ac 2 -b:a 192k -af "adelay=0|0"-f mpegts udp://230.0.0.5:10...
by roderrooder
Fri Jan 11, 2019 1:08 am
Forum: Usage
Topic: Lossless HDR Capture
Replies: 5
Views: 758

Re: Lossless HDR Capture

I actually own both the Magewell Pro Capture HDMI 4k Plus and the Avermedia Live Gamer 4k, however I haven't attempted to record lossless with either as I don't feel there will be much benefit in quality once uploaded to a streaming service. While I haven't tested lossless capture, I know that someo...
by roderrooder
Thu Jan 10, 2019 9:58 pm
Forum: Usage
Topic: Lossless HDR Capture
Replies: 5
Views: 758

Re: Lossless HDR Capture

I'm looking to hopefully change the container they store rtbufsize in, if it was stored in 64bit container you could greatly increase buffer size, I'll let you know if I figure anything out. That being said, it's possible that your GPU, CPU, or hard drive isn't keeping up. So regardless of how large...
by roderrooder
Wed Jan 09, 2019 9:56 pm
Forum: Usage
Topic: audio video not syncing
Replies: 7
Views: 741

Re: audio video not syncing

Is the audio ahead or behind the video?
by roderrooder
Wed Jan 09, 2019 9:54 pm
Forum: Usage
Topic: Lossless HDR Capture
Replies: 5
Views: 758

Re: Lossless HDR Capture

The amount of threads used is based on the codec, -threads doesn't really work based on everything I've read about it. -rtbufsize is limited by it's container, they're using an INT32 to store the value that caps at 2,147,483,647, been trying to get them to fix this for a while now. You show output f...
by roderrooder
Thu Oct 25, 2018 7:07 pm
Forum: Usage
Topic: Outputting interlaced video
Replies: 2
Views: 3030

Re: Outputting interlaced video

Give this a try:

Code: Select all

ffmpeg -i input.mxf -pix_fmt yuv420p -c:v libx264 -b:v 10M -c:a copy -flags +ilme+ildct -x264opts tff=1 output.mxf
'