All Questions
128
questions
0
votes
0
answers
14
views
Avidemux loads vertical video in horizontal orientation
I have recorded a video while holding phone vertically. It opens vertically on phone, as well as on PC, in VLC. However, when I load it in Avidemux it rotates the video to horizontal aspect rate.
I ...
- 241
1
vote
0
answers
66
views
How can I remove every nth frame from raw video using ffmpeg?
I have many cine films that have been digitally converted. They have been converted as a 25 fps with 2 frames in every 23 duplicated. I need to remove the duplicated frames using a bitstream filter so ...
- 11
0
votes
0
answers
152
views
How do you create an MPTS file on ffmpeg with two h264 inputs?
I need to contain two h.264 files (same video, different resolutions) within the same MPTS container, but I can't quite figure out how to use two inputs to create one output.
I tried using ffmpeg -i (...
- 1
0
votes
0
answers
164
views
h264_qsv is choppy when live streaming
I am trying to do live streaming of video games using h264_qvs, but is choppy when compared to libx264. Here are some variations of the ffmpeg command I am running:
Variation 1
ffmpeg.exe -y -hwaccel ...
- 141
0
votes
1
answer
915
views
Edit video h.264 metadata without encode
How can I edit these video (h264) parameters (on pic) without encode?
VUI parameters "video_signal_type_present_flag" and "colour_description_present_flag".
As far as I understand, ...
- 1
1
vote
2
answers
526
views
Smart trimming long videos with FFmpeg
I want to be able to trim a little bit off the beginning and end of a long video with FFmpeg. I can do this with a command like:
ffmpeg -i input.mp4 -ss 13 -to 59 output.mp4
FFmpeg will seek ...
- 307
0
votes
1
answer
190
views
Replace video track in MKV with track from .h264
I want to replace only the video part in my existing mkv file with the video.h264 file I created externally, I don't want to interfere with other parts or features in my mkv file such as audio or ...
- 1
0
votes
1
answer
49
views
I don't know how to play this videos
This videos are from an IP camera but I don't know how or where I can play it. I tried with VLC using a demuxer for h.264 but it doesn't work.
I tried converting the videos to mp4 but it looks like ...
- 1
0
votes
1
answer
703
views
How do I find what bitrate a CPU/GPU can decode?
I'm exporting videos to play locally on a dedicated player with a CPU like this.
The integrated GPU supports up to 4096x2304@60Hz, I assume that's talking about uncompressed video, right?
I also see ...
- 3
0
votes
0
answers
363
views
Losslessly reducing framerate of a 'video of a video'
I asked this yesterday but it was incorrectly closed as a dupe of question:Reduce video frame rate without dropping useful frames
The difference between that question and this question is - in that ...
- 117
0
votes
0
answers
733
views
Is a CRF of 1 overkill?
I am trying to save my collection of DVDs to my Mac to have in the TV app. I am using libx264 to encode from mpeg2video to h264. I want to maintain as much quality as possible and file size is not a ...
0
votes
0
answers
1k
views
H265 10 bit to H264 8 bit through NVENC looks terrible
I'm currently using FFMPEG run with Sickbeard Mp4 Automator to convert H265 video to H264 since my phone chugs hard playing H265 10 bitvideo. I set it to use NVENC and it's unnoticeable for brighter ...
3
votes
1
answer
8k
views
How to convince ffmpeg that input is raw H264?
I have a raw H.264 video stream (which starts with hex 00 00 01 FC ..., a 3-byte start code followed by a NAL unit). ffmpeg can process it but it really doesn't want to...
Let's test
Let's say the ...
- 1,235
1
vote
0
answers
353
views
FFMPEG Motion Vector Block Format
I'm trying to extract motion vectors from h264 videos using ffmpeg and the AVSideData API. I'm a little confused about the format as there are some subtleties that aren't well documented, and I'm ...
- 86
0
votes
1
answer
4k
views
Range of "global_quality" value for h264_qsv encoder?
What is the range of the -global_quality setting for ffmpeg's h264_qsv encoder (4.3.2-2021-02-27-full_build-www.gyan.dev, Windows)?
Ffmpeg's documentation for the encoder (archive) states:
The ...
- 10.9k