Re: [FFmpeg-user] mpeg2video encode gop structure

On 3/15/2018 3:13 AM, Dan Bridges wrote: 1. Here is the order of frames before sorting. I presume this is how they're stored in the stream. I    B    B    P    B    B    P    B    B    P    I    B    B    P B    B    P    B    B    P    I    B    B    P 2. Here  is the order of frames

Re: [FFmpeg-user] strange video cut

hi carl eugen - with 'cut' I meant that i duplicated the segment [mm:ss] 10:00 - 10:20 of the original video. the resulting video has bad quality although ffprobe shows identical properties of the resulting videos. the 2 command line commands i was using i wrote in the end of last mail.

Re: [FFmpeg-user] mpeg2video encode gop structure

On 14/03/2018 1:37 PM, 冯良怀 wrote: > ffmpeg.exe -i L:\input.mp4 -vcodec mpeg2video -g 12 -bf 2 -flags +cgop > -sc_threshold 10 -y L:\output.m2v I tried this.  I used the following ffprobe line: ffprobe -v quiet  -select_streams v  -of csv -show_frames -show_entries

Re: [FFmpeg-user] strange video cut

2018-03-14 22:01 GMT+01:00, Adi Marvillo : > Hi everybody, I cut a .vob file with ffmpeg. I did not completely understand the rest of your message (command line including complete, uncut console output missing) but let me just say that FFmpeg is unable to "cut" an mpeg stream, it is

Re: [FFmpeg-user] Error with vmaf: libvmaf not found

2018-03-14 14:17 GMT+01:00, Pinar Akyazi : > ERROR: libvmaf >= 0.6.2 not found using pkg-config > > If you think configure made a mistake, make sure you are using the latest > version from Git. If the latest version fails, report the problem to the > ffmpeg-user@ffmpeg.org

Re: [FFmpeg-user] mpeg2video encode gop structure

2018-03-14 4:37 GMT+01:00, 冯良怀 : > Hello, I want the GOP structure after mpeg2video coding to be > IBBPBBPBBPBB, but the GOP structure in the encoded out put file is > IPBBPBBPBB. (Trying to understand if this is an enhancement request) Why does this make a difference? What

[FFmpeg-user] strange video cut

Hi everybody, I cut a .vob file with ffmpeg. First I tried it without defining audio or video encoders - I thought that ffmpeg copies the tracks in this case, but apparently it does not... Enforced audio and video track to be copied the resulting file is much bigger in size - see testfile_big.vob

Re: [FFmpeg-user] Error with vmaf: libvmaf not found

Am 14.03.2018 um 14:17 schrieb Pinar Akyazi: Hello, I’m trying to run vmaf library in ffmpeg. I’ve pulled the latest version of ffmpeg from GitHub today. My system specs are below, i.e., using uname -a Linux grebsrv5 4.2.0-27-generic #32~14.04.1-Ubuntu SMP Fri Jan 22 15:32:26 UTC 2016

Re: [FFmpeg-user] Dropping frames from video to images

On Wed, Mar 14, 2018, at 3:06 AM, Johanna Andersson wrote: > Hi! > > I am not an expert at all in ffmpeg, but I use it to cut videos into > frames for scientific investigation of fluid flows. I want to get every > image (Windows shows me the video has 29 fps). However I seem to drop > frames.

[FFmpeg-user] mpeg2video encode gop structure

Hello, I want the GOP structure after mpeg2video coding to be IBBPBBPBBPBB, but the GOP structure in the encoded out put file is IPBBPBBPBB. How do I set the coding parameters? The following is the command I run: ffmpeg.exe -i L:\input.mp4 -vcodec mpeg2video -g 12 -bf 2 -flags +cgop

[FFmpeg-user] Error with vmaf: libvmaf not found

Hello, I’m trying to run vmaf library in ffmpeg. I’ve pulled the latest version of ffmpeg from GitHub today. My system specs are below, i.e., using uname -a Linux grebsrv5 4.2.0-27-generic #32~14.04.1-Ubuntu SMP Fri Jan 22 15:32:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux I’m having problems

[FFmpeg-user] Dropping frames from video to images

Hi! I am not an expert at all in ffmpeg, but I use it to cut videos into frames for scientific investigation of fluid flows. I want to get every image (Windows shows me the video has 29 fps). However I seem to drop frames. My code is as follows: ffmpeg -i D_CIMG7477.MOV -r 29 -f image2

Re: [FFmpeg-user] hls_init_time problem

? ? wrote > [hls @ 0x7fa2f180] pkt->duration = 0, maybe the hls segment duration > will not precise I had the same warnings when creating HLS with ffmpeg. The proble was that RTSP stream did not provide framerate information. Specifing framerate before "-i ..." will fix it. *-r 25*

Re: [FFmpeg-user] ffplay RTSP listen mode with UDP

any lead on this issue? 2018-03-08 12:10 GMT+02:00 Roee Kashi : > Hi, > > i'm trying to use RTSP to push video from client to server. > it works on TCP, but fails on UDP. > > server side: > > ffplay.exe -rtsp_flags listen rtsp://0.0.0.0:14000/test > > client side (TCP mode): >