All Questions
Tagged with ffmpeg compression
80
questions
1
vote
1
answer
918
views
Compress theora/vorbis videos
I have a theora/vorbis ogg video file. However, what I notice is that, using gzip/xz can reduce the file size by 20%/75%. Therefore, I suspect the internal format does not really compress the contents ...
- 1,811
1
vote
0
answers
445
views
FFmpeg CRF compression slower on master than old version
I use FFmpeg to compress videos (amongst other things) on Android. I have been using an FFmpeg build from 2015 for some time now and wanted to upgrade, preferably to the git master. I built FFmpeg ...
- 307
10
votes
1
answer
4k
views
How can I compress video by taking advantage of its static content?
I have an HD video that is a presentation, so it consists mostly of still images. It's a 50 minute, 200MB MP4 file, downloaded from YouTube.
Is there a way to take advantage of the static nature of ...
- 225
2
votes
1
answer
1k
views
How to compress audio track in to another track in ffmpeg
I'm trying to correct some volume issues on a couple movies. some of my movies have audio from 5.1 surround playing from stereo speakers, causing the volume to be really quiet for dialog and loud for ...
- 23
1
vote
2
answers
845
views
Batch compress .avi files with ffmpeg which contain previous date in their name
im trying to manage CCTV footage, and im trying to batch compress them with ffmpeg
So far i managed to come up with this command
ffmpeg -i "0515 210004.mp4" -b 200000 output.avi
But i need to do ...
1
vote
1
answer
2k
views
lossless video using FFmpeg ffv1 on jpeg images is not compressed but expanded
Is it possible for FFmpeg / ffv1.3 / mkv to create a lossless video is not larger than the sum of its parts (and if so, how) and if not, what is a good alternative to come close on size? The video ...
- 13
1
vote
1
answer
1k
views
Extract Y-channel of every I-frame from MPEG4 movie as loslessly as possible
I'm working on a video tracking experiment and got stuck with videos that are quite badly compressed with the MPEG4 DivX 5x/6x codec. I'm fairly new to image formats, codecs and compression, but I ...
8
votes
2
answers
15k
views
What ffmpeg settings to get the best possible video resolution/framerate that my webcam is capable of?
I want to record the best possible video file (in terms of resolution/framerate/colors) from my webcam.
Right now I am using this command:
ffmpeg -f v4l2 -framerate 25 -video_size 640x480 -i /dev/...
- 181
0
votes
0
answers
423
views
create AVC_Intra from uncompressed in best quality
I have some 720p uncompressed YUV video and I need to transcode this video into an AVC-Intra using the best possible quality.
The best possible Quality is needed, because the video probably will be ...
- 133
0
votes
1
answer
618
views
Video compression size s and codecs from JPEG
I am building a data logger with 3 cameras which output as jpeg frames (o.79MB/jpeg @24bit/pixel) at 24 frames per second. I want to take these images and convert it to a video. Each
For the video I ...
- 1
1
vote
1
answer
4k
views
How to compress an .avi video to 10% of its original size using ffmpeg?
I have a video file that is 15 seconds in length and 465,195 KB. I would like to reduce it to somewhere around 46,000 KB. Is there an easy way to do this. I have tried the largest allowed bitrate
...
- 11
28
votes
3
answers
49k
views
FFMPEG / libx264: How to specify a variable frame rate but with a maximum?
Instead of providing a fixed frame rate to FFMPEG/libx264 (-r/-framerate), I would like to specify a variable frame rate with a MAXIMUM value, and allow libx264 to down the frame rate as it sees fit. ...
- 1,689
0
votes
1
answer
7k
views
FFmpeg: Highest quality 50i to 50p conversion, comparable to Adobe Premiere
I have 50i footage (more specifically tagged as 25 fps but does contain movement on the secondary fields). I am able to get pretty good quality conversion to 50p from Adobe Premiere by simply ...
- 199
1
vote
1
answer
2k
views
How to keep EXIF data in a DSLR video after editing / compressing with Photoshop CC?
So I have a bunch of home video files with my kids and family.
I want to do some edits like text overlay, music backgrounds etc and also compress them using Photoshop CC.
However, after compressing or ...
- 148
1
vote
1
answer
2k
views
Why does FFmpeg append blank black video to the end of my MP4 files when compressed from MOV?
I have several large MOV files that I want to compress to MP4.
Unfortunately, when I use FFmpeg, it appends lots of black (blank) video at the end.
(The destination file is longer than the source ...
- 1,976