All Questions
84
questions
1
vote
1
answer
145
views
FFMPEG - How to Merge Three Files - Only Middle One Has Audio
I have three videos that I want to merge into single one.
Intro video (mp4) - 3 seconds - No Audio
Main video (mp4) - 1 minute - With Audio
End video (mp4) - 3 seconds - No Audio
When I use ffmpeg, ...
- 1,718
1
vote
1
answer
1k
views
ffmpeg video encoding has no audio
When I convert any video in ffmpeg - e.g. mp4 to mkv, mkv to mkv - I lose audio for some reason
here are the parameters I originally used:
ffmpeg -i input.mkv -vf scale=640x480 -vcodec libx264 -...
0
votes
0
answers
87
views
Using ffmpeg and concat demuxer producing weird video navigation behaviour
When combining multiple videos segments, each encoded with H265 and Vorbis and containing the same number of streams and frame rate, I use:
ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.mkv
...
- 11
0
votes
1
answer
158
views
FFmpeg: Audio is sped up after compressing AVI video
I have an AVI video and I want to reduce the file size. When I run the FFmpeg command below, the resulting audio in the video is sped up, and the last bit of the video has no audio. I play all my ...
- 1
1
vote
2
answers
374
views
FFmpeg - How to replace the image of a video with a png without modifying the audio?
I'm trying to modify several videos as quickly as possible. The goal is to replace the original image of the videos with a black or white image, in short, an image with nothing.
Searching the internet ...
- 21
0
votes
1
answer
345
views
ffmpeg warning and no sound on the encoding video
i try to convert a dvd to mp4 with ffmpeg (on windows) but i have some warning message AND i have no sound on the converted video
i use this cli :
ffmpeg -hwaccel qsv -i VTS_01_1.vob -vf yadif -c:v ...
- 1
0
votes
0
answers
147
views
How to add random music for video with ffmpeg
I'm a new user of FFmpeg, I want to add random music (defined folder) for multiple video with ffmpeg ?
Specifically: I have a FFmpeg command, i used to process multiple videos in the folder at the ...
- 145
1
vote
1
answer
77
views
ffmpeg: Merge short audio sound between two audio streams
I have two videos input1.mp4 and input2.mp4 both of them with duration of 60 seconds. I also have one 8 seconds long audio input sound.mp3. So right now I'm concatenating these two videos with xfade ...
- 13
2
votes
0
answers
354
views
Facing delay in audio while using ffmpeg with h264_nvenc encoder
I am trying to capture my windows10 desktop with desktop duplication api and on-gpu D3D11 textures, in the form of ffmpeg D3D11VA frames @60 fps. Required command is given here. On top of that I am ...
- 21
1
vote
0
answers
226
views
Steps to troubleshoot lost audio and subtitles after using ffmpeg?
I have a video file in which the video and subtitles are about 27.3 seconds ahead of the audio. I'd like to sync them back up. I followed the instructions on this post: In ffmpeg, how to delay only ...
- 282
0
votes
1
answer
2k
views
ffmpeg webm (codec vp9) to mp4 not working on all browsers
I'm recording a video from chrome browser in webm format and on the backend side I want to convert it into mp4 so it can be played back on all devices. The video has this sample name: test.webm;...
- 135
2
votes
1
answer
2k
views
Only convert codecs(preserve audio and subtitles)
I have a video file h265 mkv which has dual audio and multiple subtitles.
I want to convert it to h264 since it doesn't require further transcoding on my jellyfin server.
But I haven't been able to ...
- 21
2
votes
1
answer
2k
views
How to fade from one video to another in ffmpeg, both audio and video
I've been experimenting with the xfade (video) and acrossfade (audio) filters in ffmpeg to allow the 'fading' between two input videos, but I don't actually see a way to get ffmpeg to properly fade ...
- 2,988
0
votes
0
answers
397
views
ffmpeg: Combining two A/V streams results in out of sync audio in VLC player but not QuickTime
I have two files (one audio, one video, both mp4) I want to combine into a single mp4 without re-encoding the streams. They both have the same duration (well, technically one is 0.05s longer than the ...
- 1
2
votes
1
answer
263
views
convert huge amount of mp4 videos to audio in short time
previously i used to think i can convert say 100G video to audio in matters of seconds because i thought video and audio are seperare in mp4 format and converting video to audio is like doing an easy ...
- 23