Re: [FFmpeg-user] Segment at Scene Change

2020-09-23 Thread adam smith via ffmpeg-user
> I would like to segment and create a sequence of ts files that are split > based on a scene change threshold, and have a separate ts file for each song. You could probably do this in two passes. The first using the select filter to find the timing of each new image. The second pass using

Re: [FFmpeg-user] Encoding Warnings

2020-06-29 Thread adam smith via ffmpeg-user
> On 29 Jun 2020, at 15:44, Jim wrote: > > (While this doesn't equalize the volume or eliminate all volume-related > inconsistencies, it does make the loudest part of each video the same and is > the best solution I've found; I think you would like the loudnorm filter that incorporates

Re: [FFmpeg-user] Error when reading file as stream

2020-05-05 Thread adam smith via ffmpeg-user
> On 5 May 2020, at 17:15, Carl Eugen Hoyos wrote: > > Am Di., 5. Mai 2020 um 14:19 Uhr schrieb adam smith via ffmpeg-user > : > >> That will not resolve 3rd party files > > What's wrong with using qtfaststart on them (or on all files)? > The problem is th

Re: [FFmpeg-user] Error when reading file as stream

2020-05-05 Thread adam smith via ffmpeg-user
> On 4 May 2020, at 16:23, Carl Eugen Hoyos wrote: > > The result is very similar, but qtfaststart takes an existing mov file and > only moves the index in front of the file, leaving everything else exactly > identical while ffmpeg -i input -movflags +faststart out.mov writes a > new file

Re: [FFmpeg-user] Error when reading file as stream

2020-05-04 Thread adam smith via ffmpeg-user
Thanks Carl, Thanks for stopping me going down a never ending rabbit hole. > On 4 May 2020, at 13:18, Carl Eugen Hoyos wrote: > > Many files, esp. some mov/mp4 files, require seeking. Seeking is impossible > if you provide the input through a pipe, this is not a limitation of FFmpeg. Good to

[FFmpeg-user] Error when reading file as stream

2020-05-04 Thread adam smith via ffmpeg-user
Hi you lovely people, I have another question that I cannot find a resolution for, so I am hoping somebody can shed a little light on the subject. When passing the source as a file into ffmpeg from regular storage, my ffmpeg commands are working correctly and I am happy with the output. When

Re: [FFmpeg-user] Output image sequence duplicate first image

2020-04-21 Thread adam smith via ffmpeg-user
> On 21 Apr 2020, at 09:27, adam smith via ffmpeg-user > wrote: > > > Thanks for the information. I will give it a whirl using the fps filter and > see what happens. > Good news…for me anyway. Carls suggestion appears to be a solution. The new command is... ffmpeg -y

Re: [FFmpeg-user] Output image sequence duplicate first image

2020-04-21 Thread adam smith via ffmpeg-user
> On 20 Apr 2020, at 23:10, Mark Filipak > wrote: > May I suggest the following workaround? > > Remove the 1st (duplicate) frame with a select filter: > > ffmpeg -y -i /data/vod-storage-dev/source/testfile.mxf -vf > select='not(eq(n\,0))' -r 20/60 -s 283x159 -frames:v 10 -pix_fmt yuvj420p

Re: [FFmpeg-user] Output image sequence duplicate first image

2020-04-21 Thread adam smith via ffmpeg-user
> On 20 Apr 2020, at 22:51, Carl Eugen Hoyos wrote: > > Am Mo., 20. Apr. 2020 um 19:32 Uhr schrieb Edward Park > mailto:kumowoon1...@gmail.com>>: >> >>> Use the output option -r or the fps filter to control the frequency of the >>> image grabs. >>> They will show different behaviour wrt the

Re: [FFmpeg-user] Output image sequence duplicate first image

2020-04-20 Thread adam smith via ffmpeg-user
> On 20 Apr 2020, at 15:38, Edward Park wrote: > > If this is accurate, it looks like you have asked it to produce 20 frames in > 60 seconds, or 1/3 fps, or 1 frame every 3 seconds regardless of input > framerate, whatever. It will drop frames, duplicate frames, do what is needed > to keep

Re: [FFmpeg-user] Output image sequence duplicate first image

2020-04-20 Thread adam smith via ffmpeg-user
> On 20 Apr 2020, at 16:03, Carl Eugen Hoyos wrote: > Use -vsync 0 and remove -r. Thanks for your help Carl. Adding the -vsync 0 and removing -r did resolve the issue duplicate image output but did not allow me to specify the frequency of the image grabs. I will search about for something to

[FFmpeg-user] Output image sequence duplicate first image

2020-04-20 Thread adam smith via ffmpeg-user
Hi you lovely people, I am trying to output a sequence of jpeg images from a video file. The command does indeed output a sequence of images, but the first and second are always duplicates, while the rest run in sequence until the maximum is reached or the file runs out. I am not sure what I

[FFmpeg-user] Using SEI timecode data as -timecode value

2019-04-17 Thread adam smith via ffmpeg-user
Hi you lovely people, I am trying to find a way of using the SEI timecode data in a TS file to add timecode to an XDCAM.MXF output file. I have done a fair amount of googling, but don’t seem to be getting very far. I did try this… ffmpeg -i /Users/adam.smith/Downloads/media-with-sei.ts -vcodec