Questions tagged [encoding]

The process and techniques used when storing moving images, sound, metadata and other streams as a digital file.

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0answers
96 views

Optimizing HTML5 video for best quality

I have a 3 minute video I'd like to embed on a web page. The problem is that despite best efforts, the file size of the video ends up being over 30 mb. I would like the size to be near 10 mb. I have ...
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2answers
207 views

Free software for batch basic editing and down-sampling

I have a bunch of TV shows in HD that I want to down-sample to SD and at the same time strip out the titles and credits. Handbrake has great encoding and can handle batches, but I can't find a way to ...
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1answer
841 views

H.264 adding dark anti-aliasing even on high444 yuv444p

I have a PNG file with white on red and no antialiasing at all - each pixel is either white or red, but when I encode it to MP4 using ffmpeg -i test.png -profile:v high444 -pix_fmt yuv444p -loop 1 -...
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2answers
145 views

Encoding low bitrate video source file to a higher bitrate

I need to know if there will be any difference in the quality of the encoded video if the bitrate of the source file is, let's say 2000kbps and I encode it to 4000kbps. Any help will be much ...
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0answers
496 views

HLS Preset Settings 240p, 360p, 480p, 720p and 1080p

I am trying to transcode mp4 videos into HLS using AWS transcoder. I see that there are only few presets available which are like 1M, 1.5M and the highest 2M. I am unable to get 240, 360 , 480,720p ...
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1answer
502 views

libx265 NUMA pool configuration misleading

I have the following scenario: Using libx265 and a dual-socket system (thus 2 NUMA nodes) I want to encode videos using ffmpeg and libx265. libx265 can be configured to use thread-pools which are ...
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0answers
712 views

How can I mux video and audio from separate sources that're at different frame rates?

I'm having trouble muxing the video from one source with the audio from another because the audio drifts over time. As I mentioned in the title, the sources are at different frame rates, the video's ...
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0answers
23 views

Extract video from sony handycame with perfect quality

I've got an old sony handycame that record into tapes. When i try to display the videos in my samsung tv using RCA cables, the video is full screen and with a really good quality. I wanted to ...
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1answer
517 views

What is the colour range of most videos?

Colour range (Limited, Expanded) is something I've only thought of recently, and I'm worried I may have introduced colour banding into some of my videos. When doing a standard MP4 export from ffmpeg, ...
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0answers
712 views

FFmpeg Windows MP4 - remove specific frames

I have a movie - movie.mp4. I wish to remove/delete specific contiguous frames from movie.mp4 which are located somewhere near the middle. Specifically, total frames in movie.mp4 = 33,595. I would ...
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1answer
139 views

Add filter to prores file

I have captured some Mini-dv home videos to .avi. With ffmpeg I converted to prores v2 .mov files. Now i need to add yadiff filter.(interlaced -> noninterlaced) Is is possible to "update" my files ...
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46 views

Best encoding setting for presentation like video

I have a video series that have a low fps by nature. The videos are in presentation format with audio. The video is produced using Adobe Premiere Pro CC 2015 and contains 4K image clips and 256kbps ...
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1answer
587 views

Reencoding H.264 to H.264 made it 40% larger

I've got some livestreamed footage (encoded with constant bitrate), and I've been trying to reduce the file size for long-term storage. I figured that since encoding speed is no longer a constraint ...
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1answer
41 views

How to save playable infinite video?

The situation is described here. In short, I need a way to save infinite video real-time, playable while being saved. Suppose, there are ways to do this. I imagine it's done like in web DASH, in ...
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2answers
9k views

Handbrake x265 Optimal settings for ripping DVD

I want to rip DVDs(MPEG2) to MKV using Handbrake for viewing on PC, and currently i am not sure about the settings of the x265 encoder. Can anyone suggest the optimal settings for: CRF : 19 ? 23 ? 25 ...
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1answer
710 views

How to tune ffmpeg libx265 parameters for encoding old sprite based game video?

I'm using ffmpeg libx265 to encode some fun gameplay clips from old games. Typically this means low resolution pixel art, with small sprites moving against a static or scrolling background. The ...
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1answer
1k views

encoding with ffmpeg libx265 -pix_fmt gray gives unplayable vid

What am I missing? I encode an old black and white film clip with ffmpeg libx265 passing -pix_fmt gray. The output is unplayable in both vlc and mplayer (linux), so I assume I'm missing something... ...
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1answer
77 views

Which tool is capable to create avi with multiple audio tracks?

What tool may be used for creation of videos (e.g. AVI containers) with multiple audio tracks? I mean the tracks which may be switched independently, like different languages on a DVD.
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1answer
29 views

Suggestions/Ideas for a “Show Me” project for school about Audio or Video Encoding?

Basically, I need to make a quick "Show Me Something Cool" project for my physics class. It could be about anything sciency, that is cool, and that you can explain & demonstrate in class in like 5 ...
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2answers
1k views

ffmpeg h264: VLC could not decode the format “aivx”

I am using the following command to make h264 archives of video with ffmpeg: ffmpeg -i myfile.mov -c:a copy -c:v libx264 -preset slower -crf 20 myfilearchive.mov To get 10-bit h264 support for ...
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1answer
1k views

How to prevent chromatic aberration (green/purple fringing) on an After Effects export?

I'm relatively new to After Effects. I'm building a short ad using a free template I downloaded. I then rendered the project using Adobe Media Encoder on the H.264 Youtube 1080p setting. ...
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2answers
2k views

What are the best codecs and encoding options for a image sequence video?

I am trying to make a video out of an image sequence - Where each frame lasts for a second. The image sequence contains the same object shot from different distances. I'm guessing most default ...
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0answers
709 views

How to speed up DNxHR HQX capture with ffmpeg?

I'm trying to capture DNxHR HQX to my SSD. I want HQX because I need the 10-bit color for grading (HQX is a 12-bit codec, but HQ and below are all 8-bit). 8-bit HQ recording is no problem; I ...
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1answer
151 views

Please Explain the Codecs in my Example [closed]

Can someone explain what's happening in my project? Please use as much detail as possible, I just want to learn, thanks. I have an Apache web server. It contains many videos (.mp4 .mkv which are ?...
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3answers
350 views

How do I know if a video file is encoded perfectly or not?

I have to encode (transcode) many video files (usually from AVI to MP4). But to see if the encoded files are correct or not I will play all the files manually, which is rather tedious. Is there any ...
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1answer
84 views

Archiving raw video

I am trying to organize the videos on my external harddrive. I have a lot of home video shot with a hand held camera, and now I am using a GoPro 4 camera that I record 4K video with. It consumes a lot ...
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1answer
869 views

Largest input image size when encoding a video?

I got a bunch of really large 16 bit videos, approaching 65535×65535 pixels in size. These are essentially high quality timelapse panoramas. I want to convert them to a 7680×4320 movie (8K UHD, 8 bit)....
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0answers
1k views

gain the highest quality with H264 at a certain bit rate

I have encoded my videos using ffmpeg and H264, and this is my ffmpeg command (2 pass encoding): ffmpeg -y -i Edited\ Clips/arsenalVScristalPalas.mp4 -movflags faststart -c:v libx264 -x264opts '...
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1answer
1k views

How to encode with x265 cli

I have some raw H.264 10bit videos need to convert to HEVC format, but the encoder only takes some frames (600/170000) to encode, and the video is full of noise. What is the correct way to encode ...
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1k views

H264 Remove Encoding Settings - Error FFMPEG

" Removing MP4 encoding information " I have tried the formula of interpretation but I have compared it with such an error. " Unknown bitstream filter h264_changesps " What am I supposed to do?
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1answer
282 views

Is HandBrake tune -still image applicable to videos with minimal movement?

I have some educational videos that are mostly PowerPoint slides and a teacher sitting in a chair talking. Is the -still image tune applicable for videos like that? I would like to make them as ...
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1answer
4k views

ffmpeg convert mp4 to mov with dnxhd codec

I'd like to convert an mp4 file to DNxHD for use with DaVinci Resolve. Here is my attempt of doing the conversion using ffmpeg: C:\FFMPEG\bin\ffmpeg.exe -i "H:\Downloads\test.mp4" -vcodec dnxhd "...
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1answer
2k views

What are the differences between the three bundled ffmpeg prores encoders?

I'm using ffmpeg and while looking through the list of codes with ffmpeg -codecs I realized there are actually three different prores encoders: prores prores_aw prores_ks What are the differences ...
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3answers
5k views

ffmpeg- What's the difference between “NN000/1000 fps” and “NN000/1001 fps”?

I'm trying to select the correct capture options for ffmpeg and I'm confused by this kind of listing: [decklink @ 00000000010564c0] 17 3840x2160 at 24000/1001 fps [decklink @ 00000000010564c0] ...
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1answer
1k views

How does the h.264 encoder determine where to put i-frames?

I'm reading a bit on I-frames and their counterparts, P-frames and B-frames. I understand the usage. I-frames are the key to the compression and following P and B-frames can use the data in I-frames ...
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1answer
699 views

FFmpeg, encode video for 720p @ 4mbps playback

I've been fighting with this dilemma for about a week or two now and I've tried my best to understand it from whatever I can find through google. What I need (or at least I think I need) to do is ...
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0answers
437 views

Using FFmpeg can I merge three different videos using overlap and overlay in one instance?

I'm quite new to FFmpeg, so please bear with me. I find myself in a situation where I have: An intro video A main video An outro video Desired effect: The intro video has an alpha channel that at ...
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1answer
272 views

Best quality conversion from VHS to digital domain (USA)

I (like everyone else) have some old home movies on VHS, VHS-C and 8MM (and maybe a couple DV even...). I'd like to get them on my computer so I can edit them and store them. In the past, I've used ...
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2answers
4k views

How to stop ffmpeg from interlacing when converting from m2ts to mkv

I have a m2ts video file that contains a h264 video stream and an ac3 audio stream. The quality is not the best, but it is okay, but converting it with ffmpeg without any additional options makes the ...
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2answers
391 views

How to stop Sony AVC/MVC encoder from adding 4:3 aspect ratio to 16:9 videos?

I am using Movie Studio Platinum 13 (essentially, light version of Sony Vegas). I am creating a project based on mp4 files recorded on my Sony Alpha camera. These files have pixel resolution ...
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1answer
9k views

Mono to Stereo using FFMPEG

I have an unusual problem that I hope someone can help me solve. I have 45 video files that I'm batch encoding as MP4. Some of those files have their audio channel position set to Front L R and others ...
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1answer
977 views

Bad quality encodes to Prores4444 with alpha from ffmpeg

EDIT: This bug has been fixed. If you're experiencing the problem below, try updating ffmpeg I need to supply video with alpha as a prores4444 encoded file. I've been trying to use ffmpeg, but for ...
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2answers
2k views

What deinterlacing filter should I use to encode/compress a PAL MPEG-2 576i 25fps raw file?

I have a PAL MPEG-2 576i 25fps raw capture (presumably either straight from satellite or a DVD recorder) that I would like to encode to AVC. I'd like to deinterlace the file during compression with ...
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0answers
580 views

Is it possible to increase video gamma or brightness at container level?

I would like to know if is it possible to increase the brightness or gamma of a video without full re-encoding. For example some versions of ffmpeg allow certain special bitstream filters described ...
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1answer
5k views

FFmpeg BMP to YUV x264 color shift

When I encode a particular sequence of BMP image files to AVC/H.264, the colors get shifted. Why does this happen? But if I convert the BMPs to PNGs before running ffmpeg, the video conversion ...
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1answer
2k views

What's different between Premiere's own h.264 and QT h.264 encoders?

I noticed that Premiere(CC2017) can export h.264 through its own encoder and QuickTime. Are there any / what are the differences between these two? PP Native h.264 encoder QT h.264 encoder
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1answer
556 views

Wrapping AVI with RGBA channels in a MOV file?

I'm very new to this honestly I'm trying take a rendered sequence with an alpha channel that I exported from HitFilm 4, and import it into Davinci Resolve. Resolve doesn't support AVI (I didn't know ...
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2answers
1k views

CPU Selection for video encoding

I have been perusing this page: https://openbenchmarking.org/showdown/pts/ffmpeg Something doesn't make sense to me, I am looking at the following CPU's: Intel® Xeon® Processor E5-2650L v3 (30M ...
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2answers
3k views

How many NVIDIA NVENC engines a particular GPU have?

There is a NVIDIA VIDEO CODEC SDK APPLICATION NOTE - ENCODER in which we can read the following: While Kepler and first generation Maxwell GPUs had one NVENC engine, certain variants of the ...
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1answer
453 views

Maximizing FPS of ffmpeg encoding

I am trying to figure out the sweet spot of maximizing FPS of encoding videos into h264/h265. I will be running some videos through Georges Vid.Stab library (https://github.com/georgmartius/vid.stab) ...