Re: [FFmpeg-user] Getting audio correct (Zoom meeting)

2020-08-15 Thread Carl Zwanzig
On 8/15/2020 3:14 AM, Cecil Westerhof wrote: I understood that there are different ways to record Zoom meetings. (I am not doing it myself, I only get the results.) I found that what I got was extremely small. (A video of six minutes only took 56.7 MB.) What would be the best way to record Zoom

Re: [FFmpeg-user] Compression is a lot smaller

2020-08-15 Thread Cecil Westerhof
Simon Roberts writes: > On Sat, Aug 15, 2020 at 5:01 AM Cecil Westerhof wrote: > >> Through scripts I use ffmpeg for cutting and compressing videos and >> sometimes adding a watermark. Nothing fancy, but handy. >> >> In the past the original file was between 4 to 13 times bigger as the >>

Re: [FFmpeg-user] Putting in a picture half-way through the video

2020-08-15 Thread Cecil Westerhof
Simon Roberts writes: > On Sat, Aug 15, 2020 at 4:07 AM Cecil Westerhof wrote: > >> I have to publish the video's from our Zoom meetings. Something went >> wrong. Halfway a recording the recording went from the speaker to the >> overview screen. I like to change the part of the video with the

Re: [FFmpeg-user] Putting in a picture half-way through the video

2020-08-15 Thread Simon Roberts
On Sat, Aug 15, 2020 at 4:07 AM Cecil Westerhof wrote: > I have to publish the video's from our Zoom meetings. Something went > wrong. Halfway a recording the recording went from the speaker to the > overview screen. I like to change the part of the video with the > overview screen (people do

Re: [FFmpeg-user] Compression is a lot smaller

2020-08-15 Thread Simon Roberts
On Sat, Aug 15, 2020 at 5:01 AM Cecil Westerhof wrote: > Through scripts I use ffmpeg for cutting and compressing videos and > sometimes adding a watermark. Nothing fancy, but handy. > > In the past the original file was between 4 to 13 times bigger as the > compressed file. Today I compressed a

Re: [FFmpeg-user] When cutting part of video I get a silence part before it

2020-08-15 Thread Cecil Westerhof
Cecil Westerhof writes: Some logging of the problem. When I use: ffmpeg -y -ss 61 -i zoom_4.mp4 -to 469 -acodec copy -vcodec copy -async 1 4_compressed.mp4 The video starts with 26 seconds (of negative time stamped) silent video. The log: ffmpeg version 4.1.6-1~deb10u1 Copyright (c)

[FFmpeg-user] Compression is a lot smaller

2020-08-15 Thread Cecil Westerhof
Through scripts I use ffmpeg for cutting and compressing videos and sometimes adding a watermark. Nothing fancy, but handy. In the past the original file was between 4 to 13 times bigger as the compressed file. Today I compressed a few files again. The compression was almost non existing to less

[FFmpeg-user] When cutting part of video I get a silence part before it

2020-08-15 Thread Cecil Westerhof
In the past I had sometimes the following strange problem. When cutting a part out of a video with: ffmpeg -y\ -ss "${startSeconds}" \ -i "${INPUT_FILE}" \ -to "$((stopSeconds -

Re: [FFmpeg-user] Getting audio correct (Zoom meeting)

2020-08-15 Thread Cecil Westerhof
Cecil Westerhof writes: > I have to publish zoom recordings. One of the problems is that audio > is out of sync. And it is different for the different recordings. It > goes from something I notice because I am a nitpicker, to something I > think will annoy everyone. > Is that something that is

[FFmpeg-user] Putting in a picture half-way through the video

2020-08-15 Thread Cecil Westerhof
I have to publish the video's from our Zoom meetings. Something went wrong. Halfway a recording the recording went from the speaker to the overview screen. I like to change the part of the video with the overview screen (people do not know they are being recorded and not everything is very

[FFmpeg-user] Getting audio correct (Zoom meeting)

2020-08-15 Thread Cecil Westerhof
I have to publish zoom recordings. One of the problems is that audio is out of sync. And it is different for the different recordings. It goes from something I notice because I am a nitpicker, to something I think will annoy everyone. Is that something that is just part of recording Zoom meetings