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Video editing software
(24 Oct 2017, 23:18 )madjack Wrote:
(24 Oct 2017, 20:35 )Anne Wrote:
(20 Oct 2017, 22:46 )madjack Wrote: (I'm no Peter Jackson nor even in the same league as @Anne so this may take some time and will be pretty basic)

Hey, if I can help I'd be glad to.

Thanks for the offer - just now it's mostly time that I need, but I am puzzling over one thing, the best format to convert my files to.

I use something called PCCAM to capture video/audio input (can't recall where I got it from, but it allows me to run multiple simultaneous video capture to my drive, which is useful) this plays back fine using some software called VLC (V2.2.1).
The biggest challenge is the file sizes (lots of Gb) so I like to switch formats for posting and to reduce the stress on my laptop which is still creaking a bit with all the processing power.

But.... I seem to have all sorts of issues with the sound if I convert to anything other than a WMV+WMA type (for example  H.264+MP3 is great video but no sound) and WMV for reasons I cannot comprehend challenges any attempt to edit the movie basically being in-recognised by the usual video editing tools.

Any suggestions or tips?


Some formats are better suited for editing, others, have (or used to have) good quality for the filesize and are easy for a pc to play back but are not fit to edit. Check what the preferred format of your editor is and use that. Most tools will gladly use Apple Quicktime, altough it's a proprietary format it used to be a defacto standard but it's dated now. My camera outputs h264 (MPEG-4) encoded files with AC3 audio, this is compressed but perfectly fine for editing. I think most cheap consumer cameras will use this format today. If I want to do some fancy stuff I extract all the frames from the video to png files. These are uncompressed so I'm getting the exact same quality as the original file but I can edit images in stead of video. I use Kdenlive and this will load a series of images and treats it like it's a video file. The audio I take from the original source and just put it back in, then export to whatever format suits your target audience best.
How to convert from MP4 to WEBM using ffmpeg:


ffmpeg -i input.mp4 -c:v libvpx -b:v 1M -c:a libvorbis output.webm


ffmpeg -i input.mp4 -c:v libvpx-vp9 -b:v 1M output.webm

VP9 Two-Pass encoding:

ffmpeg -i input.mp4 -c:v libvpx-vp9 -b:v 1M -pass 1 -speed 4 -c:a libopus -f webm /dev/null && \
ffmpeg -i input.mp4 -c:v libvpx-vp9 -b:v 1M -pass 2 -speed 1 -c:a libopus output.webm
Interesting article about the history and current status of various non-linear video editors:
Have to mention Handbrake here (open source video transcoder):

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