Le 22/10/2023 à 01:20, Dennis Mungai a écrit :
Please provide a sample of the input file and uncut output of the ffmpeg
command line in use.
Here is a 60 sec. piece of the input video, extracted with
ffmpeg -ss 75 -i in0.mkv -map 0:0 -c copy in1.mkv
http://pehache.free.fr/TEMP/in1.mkv
Here
Hello,
I have trouble converting a 4K HDR video into a HD SDR one. Basically it
plays much too dark and reddish in VLC (on macOS). The ffprobe output is
this video is at the bottom of the post
I first tried applying a curve filter to boost the dark tones. I works
not too bad, but the reddi
Le 26/03/2021 à 00:55, Craig L. a écrit :
Sorry. I don't think I responded to this correctly before.
I think I tried exactly that based upon this stackoverflow question:
https://stackoverflow.com/questions/64981984/ffmpeg-transcode-uhd-h265-to-sdr-h264-without-color-loss
The example in tha
Le 06/01/2023 à 14:30, Ricardo Henrique a écrit :
Hello FFMpeg team, well I'm using FFMpeg to change the encode from h264 to h265 and works
fine for most of files, but some files has the output file (h265) bigger than input file
(h264), what is the reason for this to happen? I know that there i
Le 16/01/2023 à 11:47, Moritz Barsnick a écrit :
MP4 cannot carry those HDMV PGS subtitles (or any other bitmap based
format, if I remember correctly).
MP4 can carry the DVDSUB format, which is bitmap.
The OP can give a try transcoding the PGS subtitles to DVDSUB, using
"-c:s dvdsub", but in
Le 01/01/2023 à 19:21, Reindl Harald a écrit :
Am 01.01.23 um 19:16 schrieb pehache:
Couldn't I, or
anyone else, just edit the license check code out then?
Indeed yes in the case of a free software (but no in the case of MakeMKV)
when the source code is available *you can* and the
Le 03/12/2022 à 15:42, David Niklas a écrit :
On Fri, 2 Dec 2022 11:49:04 -0800
Dan Harkless wrote:
MakeMKV is in a semi-permanent Beta state, so you need to periodically
download new license keys from:
https://forum.makemkv.com/forum/viewtopic.php?t=1053
but aside from that, it's eas
Le 02/12/2022 à 13:36, MyCraigs List via ffmpeg-user a écrit :
I'm running Debian 11.
I use the command line "cat" to concatenate videos of all the same quality together. All
VOB files are cat'd together and none others. The second bunch of videos I cat together are from a
Sony video camera a
Le 24/11/2022 à 14:29, Mahesh Velankar a écrit :
I have an input MPEG TS file 'unit_test.ts'. This file has following
content (shown by ffprobe):
Input #0, mpegts, from 'unit_test.ts':
Duration: 00:00:57.23, start: 73674.049844, bitrate: 2401 kb/s
Program 1
Metadata:
service_na
Le 12/11/2022 à 10:57, Bouke / Videotoolshed a écrit :
So, you need to de-interlace the filter.
There's also the possibility to keep the interlacing and encode an
interlaced h264 (so relying on the player to properly deinterlace). I
have never done that, and I am not sure which coding is app
Say I have an input file with several subtitles, one of them being
flagged "default" (say the 0:s:1 stream, that is the 2nd subtitle
stream). I am copying all of them: "-map 0:s -c:s copy"
Empirically I have found that:
* no option
-> the default flag is unmodified
* "-disposition:s:2
Le 01/11/2022 à 00:01, Carl Zwanzig a écrit :
-c:v rawvideo -pixel_format yuv420p
Use the video codec "rawvideo" with that pixel format for output, except
AFAICT that there is no video encoder "rawvideo" (that should throw an
error, which because of the missing command output, we don't see).
Le 31/10/2022 à 14:23, Naveen.B a écrit :
I observed some weird behaviour with fast and medium preset,
fast preset:
*ffmpeg -pixel_format gray10le -s 1600x1300 -r 30 -i CapturedImage-%03d.raw
-c:v rawvideo -pixel_format yuv420p -f rawvideo -c:v libx264 -preset fast
-crf 18 test.raw*
"-c:v raw
Le 27/10/2022 à 17:46, John Van Ostrand a écrit :
Hi All,
The RAW video discussion had me thinking about resolution and bit rates for
video and I had some questions. These are not how-to questions but general
video questions. I'm an amateur so the contest of these questions is around
video for h
Le 27/10/2022 à 13:31, Naveen.B a écrit :
one last question, any idea on how to know/measure how long the ffmpeg
takes to encode the file.
The answer depends on too many parameters.
i.e, basically I want to know how much time it takes to compress with
different presets and how much time it
Le 24/10/2022 à 18:36, Naveen.B a écrit :
I tried by giving the input with -pix_fmt, it's the same error.
Yes, I want raw video. I have converted RAW files to .mp4 successfully with
uncompressed, the size of the .mp4 format video was less comparatively.
I have 30 RAW files with each file is ar
Hello,
A webtt subtitles files starts with a few header lines, and one of them
indicates the language:
==
WEBVTT
Kind: captions
Language: en
==
But ffmpeg won't detect the language. The ffprobe output on the above
file makes no
Le 15/10/2022 à 11:20, Reindl Harald a écrit :
Am 14.10.22 um 19:24 schrieb Bo Berglund:
Is this a flawed assumption?
as it told you at the begin of this thread: you can't concat video
formats like H264 as it where wave audiofiles
Which is not what he is doing... unless I missed somethi
Le 14/10/2022 à 19:24, Bo Berglund a écrit :
First I advice reading this: https://trac.ffmpeg.org/wiki/Concatenate
Been there and tried that, in fact my main concat script uses the first approach
to create the list file and supplies that to ffmpeg.
Sure, but the different methods have diffe
Le 14/10/2022 à 16:46, ibur...@compuscience.com a écrit :
I have two videos that I want to concatenate:
Video 1 - very short one with a silent audio track (2 seconds)
Video 2 - About 2 minutes. The audio starts around 10 seconds from start
The final concatenation is strange:
Le 08/09/2022 à 00:04, James Board via ffmpeg-user a écrit :
I'm trying to re-encode an MKV file that I originally created with makemkv from
the original BluRay disc. My ffmpeg command is:
ffmpeg-4.1.2-amd64-static/ffmpeg -y -i
Twin_Peaks-_A_Limited_Event_Series_-_Disc_2_t01.mkv -c:a copy
Le 08/10/2022 à 10:31, Bo Berglund a écrit :
I have two mp4 videos both at 480p resolution, which I want to concat.
They are together about 80 minutes long.
When I do this using the common way with this command:
ffmpeg -f concat -safe 0 -i join.txt -c copy joinedfile.mp4
using a file specifyin
Le 26/09/2022 à 02:51, Damien Vandame a écrit :
*The specified filename 'myvideo.jpg' does not contain an image sequence
pattern or a pattern is invalid.[image2 @ 0273929beb40] Use a pattern
such as %03d for an image sequence or use the -update option (with
-frames:v 1 if needed) to write a
Hi,
-drc_scale is an AC3 decoder option for dynamic range
compression, which must be placed before -i
Is it possible to append a stream specifier if one want to selectively
apply DRC to some streams, e.g. -drc_scale:3 to apply DRC only
to the stream #3 of the input file ?
Thanks
Le 31/08/2022 à 00:51, Clay a écrit :
Hi folks,
Can you help me fix this ffmpeg script:
The goal:
Take in an mp4 (or mkv) with one video stream and TWO audio streams (one
AAC/2ch and one AC-3/5.1ch)... and output four video renditions (1920,
1280, 720, 480) that all keep *both* audio streams.
The
Hi,
Not strictly speaking a ffmpeg (recurring) question, but ffmpeg is often
used for that...
Since I a have only a stereo setup (albeit a decent one) attached to my
TV, I started a while ago to generate downmixed 2.0 tracks with ffmpeg
on my video files with 5.1 (or 7.1) tracks.
My orig
Le 28/01/2019 à 23:58, pehache a écrit :
Le 28/01/2019 à 14:11, Carl Eugen Hoyos a écrit :
2019-01-28 9:00 GMT+01:00, pehache :
Le 27/01/2019 à 16:53, Carl Eugen Hoyos a écrit :
2019-01-27 16:44 GMT+01:00, pehache :
I used to apply a Dolby Pro Logic II encoding this way :
Actual command
Le 28/01/2019 à 14:11, Carl Eugen Hoyos a écrit :
2019-01-28 9:00 GMT+01:00, pehache :
Le 27/01/2019 à 16:53, Carl Eugen Hoyos a écrit :
2019-01-27 16:44 GMT+01:00, pehache :
I used to apply a Dolby Pro Logic II encoding this way :
Actual command line and complete, uncut console output
Le 28/01/2019 à 09:00, pehache a écrit :
Le 27/01/2019 à 16:53, Carl Eugen Hoyos a écrit :
2019-01-27 16:44 GMT+01:00, pehache :
I used to apply a Dolby Pro Logic II encoding this way :
Actual command line and complete, uncut console output missing.
OK
ffmpeg -i test.mkv -map 0:1 -c:a
Le 27/01/2019 à 16:53, Carl Eugen Hoyos a écrit :
2019-01-27 16:44 GMT+01:00, pehache :
I used to apply a Dolby Pro Logic II encoding this way :
Actual command line and complete, uncut console output missing.
OK
ffmpeg -i test.mkv -map 0:1 -c:a aac -b:a 256k -af
aresample
Hi,
I used to apply a Dolby Pro Logic II encoding this way :
"-af aresample=matrix_encoding=dplii -ac 2"
But I learned that "-ac 2" does a full downmix of the 5.1 stream, which
is not what I want : after the DPL II resampling one simply want to
extract the 2 (encoded) front channels and that'
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