Re: [FFmpeg-user] Is a video generated with transitions different from a normal video?

ing to get exact cutting points or 2. use a smaller GOP size with the transitions command on v1 and v2. Then you get more keygrames (with a heavy overhead, ofcourse) i hope this helps. DEF ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://f

Re: [FFmpeg-user] Regarding FFMPEG usage

> This corrupts the whole video. > > Please help. Could you share the command and the console output? > > > 2. Also, is there any licensing cost for its commercial usage? > You will need to be specific by what commercial usage means. DEF

Re: [FFmpeg-user] forceidx

On Mon, 2 Aug 2021 at 12:40, Jacques Perconte wrote: > > Dear all, > > Do you know if it is possible to perform something like the forceidx > function of mencoder with ffmpeg to rebuild index of merged avi files > (with cat) without doing anything else ? > Some people familiar with ffmpeg may not

Re: [FFmpeg-user] forceidx

gt; mylist.txt; done then ffmpeg -f concat -safe 0 -i mylist.txt -c copy youroutput.avi Def. > > thanks > Jacques > > > > Le 2 août 2021 à 14:12, DEF a écrit : > > > > On Mon, 2 Aug 2021 at 12:40, Jacques Perconte > > wrote: > >> > >> D

Re: [FFmpeg-user] How to download video stream starting at an earlier time?

laying live stream section starting at > 3650 seconds from the start and lasting for 600 seconds in mp4 format. > > What would the ffmpeg command to accomplish this look like? then you add -ss 3600 before your input!! DEF ___ ffmpeg-user mailing

Re: [FFmpeg-user] How to download video stream starting at an earlier time?

On Tue, 17 Aug 2021 at 06:58, Bo Berglund wrote: > > On Mon, 16 Aug 2021 23:29:22 +0200, "Carlos E. R." > > wrote: > > >Google: download youtube video cut with ffmpeg > > > > > > > >$ youtube-dl --external-dow

Re: [FFmpeg-user] FFMPEG opencl hwaccel, opencl tonemap, vulcan hw accel for record desktop/streaming

0x720,format=nv12' is needed when you use other hardware acceleration. Def > > вт, 3 мая 2022 г. в 09:41, Def Etienne : > > > > > ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-u

Re: [FFmpeg-user] Error: Impossible to convert between the formats...(Nvidia codecs)

ze 800k -g 25 -acodec copy -strict -2 -flags +global_header -f rtsp "rtsp://localhost:8000/stream" Def > > but I am faced with this error: > Impossible to convert between the formats supported by the filter > 'Parsed_null_0' and the filter 'auto_scale_0' &

Re: [FFmpeg-user] New ffmpeg user

commands at the prompt! What am I doing wrong? It is a good idea to show the command that you entered and the uncut console output. What do you mean by launching it? Greetings DEF > _ ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.or

Re: [FFmpeg-user] Stuck preparing to compile ffmpeg from git source

On Mon, 13 Apr 2020 at 04:09, Mark Filipak wrote: > > On 04/12/2020 11:00 PM, ffmpeg-de...@talkvideo.net wrote: > > I apologize if I misread your situation. > > > > If it is a Linux compile, I will cover that and post > > a link to the video. > > Perhaps I can save you some effort. > > It's a Linu

Re: [FFmpeg-user] Can't write packet with unknown timestamp

> Am Sa., 25. Apr. 2020 um 03:42 Uhr schrieb Mark Fili > > > By trial-&-error I discovered that this: > > 'mplayer H:\VIDEO_TS\VTS_01_1.IFO -dumpstream -dumpfile TITLE1.VOB' > > No, please test the following (untested, but I hope you get the idea): > $ cd H: > $ mplayer -dvd-device VIDEO_TS dvd://1

Re: [FFmpeg-user] Muxing Video from Cam1 with Audio from Cam2?

On Sat, 20 Feb 2021 at 03:56, Steven Kan wrote: > > > What’s the correct syntax to mux the video from new Cam1 with the audio from > older Cam2, while completely discarding the unwanted video from Cam2? > Preferably without transcoding anything, since I want to minimize CPU usage. > I ran the f

Re: [FFmpeg-user] linux compile ffmpeg with options from file

On Sun, 1 Dec 2019 at 15:59, Michele Salerno wrote: > > I have this role ansible but non merge > https://github.com/mikysal78/ffmpeg-cuda/blob/3ee1bba28f6618c4800f5fb24ddf4ec291ee2c26/tasks/main.yml#L65 > > if run line manual is ok, from ansible no. > > it's posible ./configure --options from file

Re: [FFmpeg-user] Extra video frames were added when doing the resolution transform

On Sat, 7 Mar 2020 at 11:44 Du Dengke wrote: > Yes, the audio and video have different start times: > ffprobe -i test.mp4 -show_entries stream > video: > start_pts=116370 > start_time=1.293000 > audio: > start_pts=0 > start_time=0.00 > Greetings sir, Was just wandering. With this knowle

Re: [FFmpeg-user] Extra video frames were added when doing the resolution transform

On Sat, 7 Mar 2020 at 12:08 Ted Park wrote: > Hi, > > >> Yes, the audio and video have different start times: > >>ffprobe -i test.mp4 -show_entries stream > >> video: > >> start_pts=116370 > >> start_time=1.293000 > >> audio: > >> start_pts=0 > >> start_time=0.00 > >> > > > > Greetings si

Re: [FFmpeg-user] Screenrecording, audio is sped up when other process starts

On Tue, 24 Mar 2020 at 21:04 Tarjei Bærland wrote: > Hello! > > I have an issue where my audio is sped up when I start certain process > while running ffmpeg. You can hear it after about 13 seconds in this video: > https://www.youtube.com/watch?v=aGr2pDgZ_6k (it's in Norwegian and > informal, as

Re: [FFmpeg-user] cutting mp4 with ffmpeg

-encode the video. /dev/shm/ffmpeg/ffmpeg -i ~/6029.mp4 -c:v libx264 -c:a pcm_s16le -t 64.600 /dev/shm/6029_cut_2.mp4 avoid using "-to" in the place of "-t" like i explained. if you must not reencode and you want to use copyts then you must add the option "-avoid_negati

Re: [FFmpeg-user] '-t' versus '-to'

he output video specified. other times you want to trim, you know your start time and end time but perhaps you are lazy to calculate the duration. the you use -to to denote your _position_ in the video as in -ss 00:12:03 -to 15:04:08 for example. DEF > > I do not see these terms defined ou

Re: [FFmpeg-user] Non-monotonic DTS issue with merging MP4 files with different tbn

0x31637661), > yuv420p(progressive), 564x396, 17 kb/s, 30 fps, 30 tbr, 30k tbn (default) ^ > > Now if I try to merge the 2 files as follows, I get the notorious > non-monotonic DTS error as below: > *merge.txt* > file 1.mp4 > file 2.2.

Re: [FFmpeg-user] FFmpeg and libx264 presets and Constant Rate Factor (CRF)

> > On 7 Aug 2021, at 10:12, Bill Crockett wrote: > > First of all, I am not doing 2 pass encoding. I am using the CRF option. > > They say for constant quality encoding, you will save bitrate by choosing a > slower preset. A slower preset will provide better compression. > > ultrafast

Re: [FFmpeg-user] Ffmpeg hardware acceleration unsupported formats betwen transpose and auto_scaler_0

ing filters! > Failed to inject frame into filter network: Function not implemented > Error while processing the decoded data for stream #0:0 > ``` > > How can i solve this issue? You can use a filter chain and rotate it therein. So you might

Re: [FFmpeg-user] libvpx + libopus creates files with negative starttime for audio

Sent from my iPhone > On 4 Sep 2021, at 14:16, Mike Martin wrote: > > Hi > I have come across an oddity with transcoding files to vp9/libopus from mp4 > > The resulting files have a negative starttime for audio , nearly all the > time this is -.007. > > I noticed it when I was concating fil

[FFmpeg-user] Packages needed to enable nvenc (NVIDIA)

—enable-* do I add if I would like to use the c:v h264_nvenc option? Thanks for any help Def Sent from my iPhone ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or

Re: [FFmpeg-user] FFMPEG opencl hwaccel, opencl tonemap, vulcan hw accel for record desktop/streaming

g that you just want to use hardware acceleration for screencasting, in which case you do not need to use all the options at once. Def > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user

Re: [FFmpeg-user] FFMPEG opencl hwaccel, opencl tonemap, vulcan hw accel for record desktop/streaming

Sent from my iPhone > On 4 May 2022, at 11:35, KoreanFanOfficial > wrote: > > ffmpeg -y -r 25 -framerate 25 -video_size 1920x1080 -window_id 0x5a0002e > -init_hw_device opencl=gpu:0.0 -filter_hw_device gpu -f x11grab -i :0 -f > alsa -i pulse -vf > "format=nv12,hwupload,tonemap_opencl=t=bt709

Re: [FFmpeg-user] Re-wrapping J2k

atio=N/A > display_aspect_ratio=N/A > color_range=unknown > color_space=unknown > color_transfer=unknown > color_primaries=unknown > field_order=progressive > > Does anyone know how to have the output file inherit the exact metadata > properties of the source when doin

Re: [FFmpeg-user] Concat MTS problems

tching to matroska instead. > > The problem is that it doesn't stitch them seamlessly, but instead I feel > like 1-2 seconds audio and video gap or so by playing concatenated video in > MPC-HC... > Did you try mpv/vlc? > Is there any way to check, is it a concat

Re: [FFmpeg-user] ffmpeg watermark by -vcodec libx264

gt;>>> > '' > shell_exec("$ffmpeg_b -y -i $video_file_full_path -vcodec libx264 -preset > {fast} -filter:v scale=3840:-2 -crf 26 $video_output_full_path_4096 2>&1"); > '' > > please show

Re: [FFmpeg-user] FFPLAY

Sent from my iPhone > On 19 Sep 2023, at 09:08, faut_voir wrote: > > Hello, > > > _I've spent a lot of time to look for an answer about my 2 questions whithout > success_ : > > > *# QUESTION 1* > > I would like to play a movie's file on my computer, but select and play > directly by th

Re: [FFmpeg-user] splitting up video with high quality (HDR, 4k, Dolby Atmos+ TrueHd)

he sound is not played in all segments. The video is always flawless. My >> question now is if someone can help me to get these segments to work. >> because theoretically it is just a copy of everything and always cut off >> after a few seconds. >> &g

Re: [FFmpeg-user] cutting mp4 with ffmpeg

from another time which is not the 0th second then an -ss parameter is needed which _must come_ before the input file on the command line and the “-to” mist have followed the -ss command before the input file. Try ffmpeg -i ~/6029.mp4 -copyts

Re: [FFmpeg-user] Transcoding individual segments of HLS?

Sent from my iPhone > On 16 Mar 2024, at 06:44, David Johansen wrote: > > I've used ffmpeg to convert an H.264 .mp4 to segments for HLS playback and > it works. I'd like to then transcode them to H.265 so that it's available > as well, and I'd like to process them as individual segments so it

Re: [FFmpeg-user] (no subject)

> > On 16 Apr 2024, at 14:30, B-2014 Ariyan Kashyap > wrote: > > Getting this err while running ./configure --enable-shared > > ./configure --enable-shared > nasm/yasm not found or too old. Use --disable-x86asm for a crippled build. > Install a recent versi

Re: [FFmpeg-user] setpts filter produces much smaller files

w produces nearly > identical files. > > I wonder if this a bug in the mac version of ffmpeg? I don't see why the > setpts filter should produce a much lower bitrate, nor why it would be > different under linux. The complete uncut console output i