All Questions
725
questions
-3
votes
1
answer
62
views
ffmpeg auto scaling problem - Picture width must be an integer multiple of the specified chroma subsampling [closed]
Apparently one of my input files have a wonky aspect ratio and it lands on a "non - integer" auto scaled width. which produces an error message about chroma multiples (naturally)
ffmpeg -i &...
- 1,155
0
votes
0
answers
57
views
How to specify --extra-cflags and --extra-ldflags when cross compiling?
I am using the cross compiler aarch64-none-linux-gnu.
Now I am trying to compile ffmpeg for aarch64 for a board with arm cpu.
My question is when I run script like:
export SYSROOT=/mnt/d/Libs/cross-...
- 171
0
votes
0
answers
21
views
How to add a new filter to FFMPEG in c with third-party dependences
I'm a newbie to FFMPEG development and want to add a customized filter to FFMPEG.
I've followed the filter tutorial in the docs. However, it's just a very simplified example and not mentioned how to ...
- 447
0
votes
0
answers
34
views
FFMPEG Trimming Issue in Docker Container for Safari-recorded Videos
I am facing an issue with FFMPEG while attempting to trim a video to a specific duration in a Docker container. The trimming works perfectly on my local machine (M1 Pro), but when I run the same code ...
- 19
0
votes
1
answer
87
views
How to process float32 arrays by video compression tools and get back float32 values? Video and image formats which natively supports float32 values
I have multiple arrays of float32 values, which might be interpreted as images. They go in the sequence. They are one channel only and they don't restrict itself to [0,1] range.
I would like to ...
- 610
0
votes
1
answer
101
views
MLT Framework Target GPU
I have a laptop with both an AMD iGPU and an AMD dedicated GPU and I'm using shotcut which apparently uses the MLT Framework. It seems like shotcut is using the iGPU for HW acceleration based on ...
- 65
0
votes
0
answers
137
views
FFmpeg: crossfading audio with multiple files, but works with video only
I've found this script that cross-fade's all mp4's in the directory. If I try to add the audio with AUDIO="[0:a]afade=d=1[a0];", using the same iteration, it doesn't work.
This works fine...
...
- 395
-1
votes
1
answer
51
views
ffmpeg avcodec_parameters_copy crash on android
i'm new to this, and i am trying to create an muxer app out of android ffmpeg, so i compile .so lib through ubuntu with:
API=21
CPU=armv8-a
ARCH=arm64
PREFIX=$(pwd)/android/$CPU/$ARCH
TOOLCHAIN=/root/...
- 1
0
votes
0
answers
427
views
How to stream 24/7 on youtube (audio + video) with FFMPEG
I plan to create a 24/7 stream with a video and a musical background which is located in a /Playlist folder.
I would like the music playlist to be played randomly and if a piece of music is corrupted ...
- 11
0
votes
1
answer
1k
views
Record video stream with ffmpeg as a service
I would like to use ffmpeg to record the video stream of a surveillance camera. For this I have a script to start the recording and a service for systemd. The idea is that if ffmpeg is stopped in ...
- 11
0
votes
2
answers
2k
views
Run "scrcpy" Commands And Throws Error "libopenh264.so.7 is missing" / "openh264 disabled"
I try to run scrcpy command like what I did before, and proved if it's worked not just once.
scrcpy -m 540 -S
but after re-installing my OS and use Fedora OS with dnf package manager, I got errors ...
- 17
0
votes
1
answer
168
views
ffmpeg error in subprocess.run but works in terminal
I'm creating my own MKV videos and I found a strange bug when I'm using subprocess module from python 3.11.2 to execute FFmpeg command.
My FFmpeg command is running fine in terminal (ends with success)...
- 33
2
votes
0
answers
974
views
Control bitrate of video generated using opencv VideoWriter
I am generating a video from a set of images using
cv2.VideoWriter(filename,fourcc,fps,size)
I want to use a particular bitrate for my output videos to reduce the file sizes. I am trying to mimic a ...
- 393
0
votes
0
answers
220
views
ffmpeg built on mac 10.13 fails when ran on other computer (dyld: Library not loaded libmp3lame.0.dylib)
I have a shell script called buildffmpeg.sh which I call with the command $ sh buildffmpeg.sh on my mac os high sierra 10.13 machine:
#!/bin/bash
# If you get error `c compiler failed` run `sudo apt ...
- 1,598
0
votes
1
answer
352
views
How much CPU is FFmpeg consuming?
I want to find out how much CPU my FFmpeg process is consuming. Is there a parameter or implementation for this?
I have used various linux applications, but I did not understand anything clearly.
