All Questions
94
questions
0
votes
0
answers
42
views
extracting DTS-HD MA tracks from mkv files
I’d like to extract the DTS-HD MA tracks from several mkv files ripped from Blu-rays, and I’m looking to preserve to original audio quality.
I’ve extracted the tracks with FFMPEG and MKVToolNix.
For ...
- 1
1
vote
0
answers
33
views
VMAF Quality Loss when applying bicubic interpolation to a video when upscaling with ffmpeg
First of all, I'm a bit of a beginner to this specific topic therefore any advice would be greatly appreciated!
For a project that I've currently been working on, I've been essentially trying to ...
0
votes
1
answer
20
views
MKV Audio track stop playing
I have a show with two sources, Blu-Ray and DVD. Blu-Ray doesn't contain the correct audio language but DVD does. I want to add the DVD audio track to the Blu-Ray. So I have decided to rip them.
Using ...
- 1
1
vote
1
answer
146
views
Why is it when an MKV video converted by FFmpeg to MP4 only plays on VLC media player?
I have a video in MKV format that I wanted to convert to MP4, so I used ffmpeg to convert it. The command I used was pretty simple:
ffmpeg -i <path_and_name_of_file>.mkv <...
- 13
0
votes
1
answer
105
views
Converting audio tracks only in mkv files to AC3
I have an LG CX TV. The internal video player does not recognise DTS audio format. I'd like to be able to play MKV files (which might have DTS audio tracks) from an external USB device. I was looking ...
- 1
0
votes
0
answers
59
views
Encoding MKV File Without Changing Header Information
I captured a video using a Kinect Azure SDK device. This captured video (.mkv container) has three tracks: Color, Depth and IR. I extracted the Color track using MKVToolNIX. I could playback this RGB ...
2
votes
1
answer
251
views
When copying all streams from a mkv contained to another mkv container, original cover thumbnail stream gets copied, but does not get visualized
So, to simplify the topic for this question, I am using a simple command that only copies all the original streams and puts their copies in a new mkv container.
The original cover.png stream is still ...
- 21
0
votes
0
answers
123
views
Telling FFMPEG to process all audio tracks with the same parameters as in the source and changing only the parameters I specified
I have an MKV file with 3 audio tracks (AAC stereo, stereo and 6ch) and use a following command line:
C:\Program Files\ffmpeg\bin\ffmpeg.exe -hide_banner -loglevel info -y -i "%1" -c:v copy -...
- 944
0
votes
0
answers
228
views
Change 50fps video into 25fps and keep the duration without reencoding
I have a 50fps video, where every second frame is a duplicate of the previous frame. I want to upload this video to youtube and I want youtube to think it's a 25fps video. Is this possible?
For ...
- 85
3
votes
0
answers
572
views
null bytes in .mkv file
I recently downloaded a movie (.mkv), it works perfectly on VLC Android, but after I moved it to my computer (with adb), mpv could not run it (Failed to recognize file format), nor parole (GStreamer ...
- 31
1
vote
1
answer
215
views
FFmpeg does not copy over chapter atoms when I try to remove subtitles
I have some videos encoded from The Criterion Collection, and their videos use these things called "chapter atoms". What is really odd is that ffprobe does not detect these. I assume that ...
- 11
1
vote
1
answer
989
views
Disable all subtitles (softsub) in .mkv, .mp4 files
I have several Movies/Animes with many subtitles, and I want disable all (not remove) subtitles in a batch (.bat file); below current code:
for %%a in (*.mkv, *.mp4) do (
REM disable subtitles
)
...
- 115
2
votes
2
answers
6k
views
Is there a way to extract subtitles from an MKV while maintaining the original format?
I am trying to extract (first, in case of many) subtitle track from mkv files (via CLI only, no GUIs) using ffmpeg or mkvextract.
But there is one downside to this: I have to write the output name ...
- 145
2
votes
1
answer
425
views
Old family videos with no audio... any hope of recovering the audio?
I have limited experience but have used simple tools like mediainfo and ffmpeg before, though I don't usually know what is happening.
I dug up some old digital video files of family members that are ...
- 299
0
votes
1
answer
514
views
Trouble with splitting a .mkv file in half with FFMPEG using one command, had to do it one at a time with a slightly different command
So I have a ~400GB .mkv file I wanted to upload to YouTube, unfortunately for me YouTube has a 256GB limit. So I Googled if I could split the file with FFMPEG and found the following article (FFMPEG ...
0
votes
0
answers
710
views
Copy all FFMPEG streams and metadata except the first video stream
I have some "voice memos" that were recorded through the video camera app. They have huge video streams, but I just want the audio.
How can I copy all streams via ffmpeg except the first ...
- 179
0
votes
0
answers
3k
views
How can I force a subtitle track to be set as active on an MP4 video?
I'm converting .mkv's to mp4 and it's working, however the issue is that when I open the .mp4, the subtitle track is disabled by default.
I have to manually select it as such:
How can I make it so ...
- 1
3
votes
1
answer
414
views
Cover art of mkv file not being added when converting to mp3 file
I have an mkv file, only with audio, and I attached a cover art to it, but when I convert it to mp3 the art is not added to the mp3.
The command I used to attach the cover art was the only one that ...
- 663
0
votes
1
answer
80
views
Lavf creates mysterious element in mkv (Matroska) containers with element id BF
Today I noticed that Lavf creates mkv containers that have an element with element id BF and a length of 4 bytes. According to the mkv specs
https://github.com/ietf-wg-cellar/matroska-specification/...
- 86
1
vote
1
answer
351
views
FFMPEG - COPY MKV to MP4 but add 2.0 Stream
Morning All,
Using FFMPEG currently just to re-container UHD MKV into MP4 with...
ffmpeg -i File1.mkv -c:v copy -c:a copy -strict -2 File1.mp4
But these MKV only have TrueHD or DTS-HD which is fine ...
- 11
3
votes
1
answer
2k
views
How can I include possibly several embedded cover art when converting mp3 to mkv using ffmpeg?
I wish to include embedded cover art when converting an mp3 file to mkv (vorbis).
ffmpeg -i input.mp3 output.mkv
will render a file that does play (in mpv) showing an image but the moment I try to ...
- 433
0
votes
0
answers
468
views
How to fix playback issues in VLC with a MKV file after slowing it down with ffmpeg
I ripped some extras from a DVD that are basically image galleries to MKV. They play way too fast, so I slowed them down using ffmpeg like this:
ffmpeg -i input.mkv -filter:v "setpts=64*PTS"...
- 101
1
vote
1
answer
3k
views
Convert Dolby Vision file in MKV container to MP4 container
I have a 5GB Dolby Vision file encoded in MKV container. If I play this file in my LG CX TV, there is a discoloration all over the display. Apparently the default WebOS media player that comes with ...
- 11
1
vote
0
answers
183
views
Matroska audio reports wrong bitrate when adding a cover
I'm trying to make an audio-only Matroska file, but keep having an issue in regard to the reported bitrate of the archive.
To demonstrate it, I'm first making a simple .mka without any attachments ...
1
vote
1
answer
1k
views
FFmpeg: Issues muxing/copying ASS subtitle streams from one MKV source with another MKV, causes 33secs of missing subtitle at the beginning
Hey first time posting,
But I really tried to look all around for a solution, even tried a couple of options that worked for me before for a similar issue with WebVTT from another solution [here].
...
- 11
5
votes
0
answers
4k
views
Using ffmpeg, is it possible to convert a blu-ray folder to a MKV file and add chapter titles in one go?
From time to time, I have to convert the files which are referenced by a playlist from a blu-ray disc to a MKV file. I normally use ffmpeg under Windows in a command line like the following:
"C:\...
- 1,835
0
votes
1
answer
1k
views
How to convert flac inside mkv ffmpeg?
Guys! I was wanting to know if anyone can tell me how to losslessly convert FLAC audio to LPCM without any quality loss at all?
This is info from of the mkv. Stream #0:0: Video, Stream #0:1: Audio: ...
- 3
0
votes
0
answers
630
views
ffmpeg: adding subtitles (.srt) to MKV only adds first subtitle frame
I am trying to add a separate .srt file to an existing MKV container using ffmpeg:
> ffmpeg -i 'input.mkv' -fix_sub_duration -i 'subtitles.srt' -map 0 -c copy -map 1 -c:s:1 srt 'output.mkv'
I am ...
1
vote
0
answers
209
views
Concatinate mkv from segmented recordings of rtsp
I recorded an rtsp stream to a series of segmented files via the following
ffmpeg -t $((5*60*60)) \
-i 'rtsp://[email protected]:88/videoMain' \
-c copy -map 0 \
-f segment -segment_time 60 -...
- 568
1
vote
0
answers
504
views
In ffmpeg truehd encoder, can you mark L and R as LT and RT (Dolby Surround)
When encoding a stereo audio stream with the ffmpeg ac3 encoder, you can specify that the L/R channels are Dolby-Surround (Pro-Logic) LT/RT channels, using the -dsur_mode 2 flag.
Is there a way to do ...
- 111
0
votes
1
answer
8k
views
Remove embedded subtitle streams from media file without "streaming/remuxing"
This related post gives a solution:
mkvmerge -o output.mkv input.mkv -S # remove all subtitle tracks
This other related post gives a solution:
ffmpeg -i input.mp4 -c:v copy -c:a copy -map_metadata 0:...
- 164
0
votes
0
answers
153
views
FFmpeg: SSIM Returning Unexpected Result When Input is Using MKV Container
I have an uncompressed video file and I want to compress it with a (lossless) codec.
It is all right, but when I perform SSIM test, FFmpeg is returning an unexpected result (i.e. SSIM <> 1) when ...
- 1
0
votes
1
answer
527
views
FFmpeg - Converting mkv to mp4 with surround sound
I've searched many posts about this topic, and still cant get this done.
To be exact, I'm trying to convert .mkv file with subtitles and surround sound to .mp4 with embedded subtitles and with as hi ...
1
vote
1
answer
2k
views
How to convert an mkv file with several subtitle tracks into mp4 with one of the subtitle streams hardcoded using ffmpeg?
I would like to know how to convert an mkv file with several subtitle and audio tracks into an mp4 with one of the subtitle tracks hardcoded and a single audio track selected using ffmpeg? It should ...
- 221
0
votes
1
answer
6k
views
How to losslessly transcode MKV to WebM or MP4? [duplicate]
I've downloaded a rather vast number of videos from YouTube over the past couple of years (probably in excess of 1500) - and these are all MKV.
Unfortunately — Premiere Pro seems only capable of ...
- 1
1
vote
1
answer
703
views
Converting VP9 webm to VP8
I wonder how can I convert VP9 webm to VP8 with FFmpeg or Matroska (matroska would be better) without changing any kind of setting? I just want the output to be exactly same as the input but as VP8 ...
- 157
0
votes
1
answer
885
views
FFMPEG, resize, watermark and compress a video
I can't quite combine a couple of commands in FFMPEG.
I'm trying to
Burn in an external subtitle file
map all other streams since the file contains many audio and subtitle tracks i don't wish to ...
2
votes
1
answer
1k
views
Splitting corrupted webm video file
There's a 50-minute long webm video file which stops playing after about 8th minute. As I don't require the beginning of the video, I decided to split it and get last 30 minutes of it.
For that, I ...
- 83
1
vote
0
answers
2k
views
How to fix a damaged MKV video file?
I have a damaged MKV file (power turned off while recording).
I know how to get the actual video duration (e.g. decode and send output to null, take the last frame reported PTS).
How do I edit the ...
- 111
0
votes
1
answer
1k
views
Using FFmpeg to convert to AC3 and remove extra tracks
I've been using this to convert the first audio track to AC3:
ffmpeg -i FILE.mkv -map 0:v -map 0:a:0 -map 0:s -c copy -c:a ac3 -b:a 640k FILE-AC3.mkv
And it has been working great.
I wanted to know ...
- 1
10
votes
2
answers
18k
views
Understanding FFMPEG Error Extracting Subtitles
I'm trying to extract some subtitles as an srt file because there are some lines I'd like to edit therein before remuxing the video.
Unfortunately I'm running into an error that I really don't ...
- 393
19
votes
0
answers
9k
views
Extracting Opus from WebM losslessly with FFmpeg or MKVToolNix
I have come across a strange problem when remuxing Opus audio stream from WebM to another container like ogg or opus.
Running the output files through a spectrum analyzer clearly shows that there is ...
- 321
0
votes
1
answer
3k
views
FFMpeg to manually set a file duration
My generated mkv containers (containing h265 video) are missing the video length. Is there a way to set this before the piped input is closed?
Input #0, matroska,webm, from 'camera01-20190815-203646....
- 23
0
votes
0
answers
274
views
How to batch convert a specific DTS audio track language of multiple MKV files to Dolby Digital?
I now the tool PopCorn MKV AudioConverter to convert all DTS audio tracks of a MKV file to DD. It is able to convert multiple MKVs in a folder as well. But it is not able to convert only if:
- MKV ...
- 1,048
1
vote
1
answer
1k
views
How to Extract Video & Audio from a Corrupt File with Codec Id Mismatch (wrong track type)?
The Problem:
There is a bunch of video files that can only be played with a custom player and I'd like to reverse engineer it so that the video can be played on common media players (like VLC or MPC).
...
- 333
0
votes
1
answer
905
views
Reencode mkv to mp4 with forced subs only
I've asked a similar question before but I couldn't get it to work and since it is an old post, I'm trying again. I want to convert to mp4 from mkv because many of my players have issues with mkv. ...
- 99
1
vote
2
answers
5k
views
ffmpeg to get an HEVC RTSP stream into an mkv container
I'm trying to copy an hevc video from an RTSP feed into an mkv container.
This works: rtsp(hevc) -> out.hevc then out.hevc -> out.mkv
This doesn't work rtsp(hevc) -> out.mkv
Working below:
...
- 23
0
votes
0
answers
1k
views
ffmpeg Non-monotonous DTS Error During Stream copy
I am attempting to stream copy a DTS-HD MA audio stream into the matroska container.
ffmpeg throws Non-motonous DTS errors that look like this: [matroska @ 00000294f0f902c0] Non-monotonous DTS in ...
- 43
1
vote
0
answers
816
views
How to extract two video files from an MKV container
I have a two part video. I placed both files into an MKV container using MKVToolNix and multiplexed and produced the output file. However, the second video does not play at the end of the first. ...
- 11
-1
votes
1
answer
7k
views
Converting a MKV file with DTS MA audio to AC3 5.1 (With no loss in video)
I have a linux server on which i need to do this. I have a video MKV video file with AVC video and DTS MA audio, i need to convert this to a file with AC3 5.1 Audio with no loss in video and as ...
- 99