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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1answer
782 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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1k views

FFMpeg encode with original codec

I know about the -c copy switch with ffmpeg, but this does not work with filters as it means "don't re-encode". But what I want is to have my output use the same stream formats as my input. So if I ...
3
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1answer
45 views

H.265 disadvantages with video dimensions not multiple of 8

Are there any disadvantages (like worse image quality/more compression artefacts) when encoding a video in H.265 with dimensions that are not a multiple of 16 or 8, but instead a multiple of 4 or 2? ...
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0answers
20 views

Is there any query language or CLI tool to analyze encoded bitstream?

I'm learning codec, but most of the video analyzer tools are GUI and windows based. I'm wondering if there is a bitstream query tool to find the info I'm seeking for. Using SQL for example: select ...
2
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0answers
683 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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0answers
5k views

Adobe Premiere Pro and Media Encoder crash on encoding

Well, I can't export anything, Premiere Pro or Media Encoder keep crashing. Crashes are quite unexpected, after several minutes or several hours, without any explanations: "Adobe [--] stopped working"...
2
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0answers
1k views

Is there a simple explanation of x264 encoding parameters?

So, x264 is still the most popular (free) H.264 encoder out there. But it is also still considered ridiculously cryptic as well. There are tons of switches and options in the encoder that allow you to ...
2
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0answers
262 views

Problems occurred when importing subtitles into Sony DVD Architect

I'm new to Sony DVD Architect, I can't import subtitles into DVD-Arc even though the file extension is .sub. I used Subtitle Edit to save my original subtitle file(in .ass format) to DVDSubtitle(.sub) ...
2
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0answers
219 views

Why is audio generated by avconv choppy?

I am using avconv to generate an AV stream, and the video is perfect, but the audio is very choppy using iOS Safari. Can anyone tell me what is wrong with my audio stream that's causing this? When ...
2
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0answers
57 views

How to see encoding progress in Compressor 4.1.3

Is there really no way to see progress of an encoding job in Apple Compressor 4.1.3? I started a batch (single job, one file) and this is all I see: My fan is blowing at full speed so I guess ...
2
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0answers
4k views

Fast encoding with ffmpeg

I know about presets but faster presets lose the video quality. Are there any hardware requirements I need to consider? Or are there any settings that I need to tweak? And lastly where do I place the -...
2
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0answers
108 views

What hardware should I get for a conversion farm for MXF => Prores

I currently use a mac pro for importing mxf files into FCP (equivalent to converting to prores, I believe) at about 3x realtime @29.97fps. I want to get a machine to run ffmpeg & do the ...
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0answers
13 views

Adobe Encoder Desyncs Video/Audio (MTS to MP4)

I've been trying to transcode an MTS (recorded on a Panasonic) to MP4 with Adobe Media Encoder. The audio/video has consistently gone out of sync. I've matched the source, gone over all the settings, ...
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0answers
129 views

How to delete the very last frame of a video using ffmpeg / mencoder / transcode or any other?

I am trying to delete the very last frame of a video using ffmpeg / mencoder / transcode / or any other free linux application. Here is what I have so far, and it's only extracting it, it's not ...
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0answers
245 views

FFmpeg NVENC rtsp stream encoding freezes randomly

In some executions of the following command, ffmpeg freezes at certain time and after some minutes starts to encode the stream again. The problem don't happen always. The stream server is an avigilon ...
1
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1answer
62 views

Problem setting different framerates with ffmpeg map option

I am facing a problem to set video streams framerates with FFmpeg when using the map option. Here is what I want to do: Given an input video file of 60fps, I want to generate an output file ...
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0answers
11 views

Is removing an audio segment on YouTube a lossless operation?

YouTube marked part of a video I uploaded as containing copyrighted audio. When I remove that audio segment on the YouTube website, does YouTube re-encode the audio of my whole video? Or is the ...
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0answers
231 views

Jetson Xavier and 16 12MP cameras

I recently saw the Jetson Xavier from NVIDIA (https://developer.nvidia.com/embedded/jetson-xavier-faq). I need to connect 16 12MP cameras like this one: https://www.baumer.com/it/en/product-overview/...
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0answers
34 views

broacast tv specs.

can any one help me about how can i deliver this specs for a broadcast tv channel ? : im using fcpx and compressor 4. do i need any other app or can i manage it with those ? which specs i do on fcp ...
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0answers
93 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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0answers
431 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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0answers
626 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
22 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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0answers
39 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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0answers
653 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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0answers
941 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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0answers
344 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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0answers
554 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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0answers
393 views

MPC-HC is altering the colors

In order to test a lossless recording system, I have to verify that the input video is exactly the same than the output video. As a test source I have generated an ffmpeg's testsrc pattern, which is ...
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1answer
2k views

best way to publish low latency video on ffmpeg

I am trying to publish a stream of live video that need to get to the client side in under 3 sec in latency. I am using vMix to capture a 720p/50 stream from a camera, that by virtual camera letting ...
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0answers
322 views

How to get ffmpeg/x264 to use same parameters as input?

I'm trying to accomplish a smart rendering workflow using ffmpeg/x264. In short, get ffmpeg to segment the input file. Locate the segment(s) with changes to be made. Re-encode altered segments with ...
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0answers
1k views

Lossless Editing by Combining Clips with FFmpeg x264

My new Canon Vixia HF G30 video camera has an option to encode directly to 35 Mbit/sec Mp4 at 1080p60 and it does a nice job. I primarily use it to record my daughter's high school basketball games. ...
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0answers
15 views

PTS DTS indicator in PES frame

I'm trying to add timed metadata into TS files and to the best of my knowledge it is only possible if the PES frame has the PTS DTS indicator with the value 2, which means that only PTS is present. ...
0
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1answer
13 views

How to fix Encoding Overloaded in OBS Studio?

I want to record a programming tutorial with OBS Studio in 1080p 30FPS. I have never changed the encoder, the output format is MP4. Although my computer has very good hardware, I get Encoding ...
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0answers
19 views

No Maximum Bitrate H264 codec

I am trying to export a video with a low bitrate. Regardless of what I set as the target bitrate, the video always is exported with the highest possible bitrate. This occurs whether I use VBR or CBR. ...
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0answers
15 views

FFMPEG garbled video download

I've downloaded a video using FFMPEG. The logs are here. Here's the first 10 minutes of the video that FFMPEG downloaded. As one can see, video is all garbled up. And there seems to be no audio. ...
0
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1answer
46 views

Good codec for embedded system video decoding

I need to get streaming video working where a source streams video to an embedded platform. This embedded system has an ARM-Cortex-A9 without a GPU or a hardware video decoder. Unfortunately I don't ...
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0answers
43 views

ffmpeg and minterpolate fail for large jpeg source files

I am trying to encode 5000x3000 pixel .jpg images into video, and would like use frame interpolation using ffmpeg 's minterpolate tool. I realize this is a huge video at high quality, but the idea is ...
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0answers
88 views

FFmpeg 2017 vs 2019 decoding performance improvement

I was trying to do some basic profiling on ffmpeg, following my previous question here. I have a relatively high-bitrate .ts file (17mbps), and I have two versions of ffmpeg (2017.3 and 2019.4), and ...
0
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1answer
38 views

Can't tell if prores4444XQ is any different than prores4444 in ffmpeg 4.1

Using ffmpeg 4.1 and prores_ks codec. I've encoded various clips into 4444 and 4444XQ. All play and look fine but when I try to use -pix_fmt yuv444p16le for 4444XQ I get the warning: Incompatible ...
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1answer
649 views

How to generate decryption key from m3u8 manifest? (OR) How to decrypt an excrypted MP4 using URI and IV?

I am downloading an HLS video which is AES-128 encrypted. The issue is that the downloaded video is also encrypted and hence, not viewable. The website is serving 2 M3U8 manifests: The first ...
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0answers
111 views

FFMPEG - Nero and Quicktime Format Chapters

Ok, I'm usually really good at finding the answers to my FFMPEG questions myself but I'm a bit stumped. I've got this file, an MP4, here is part of the MediaInfo: Menu 00:00:00.000 ...
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1answer
51 views

How can I change/reduce the bitrate of AVI files using Adobe Premiere Pro CC or other tools?

I'm using Eprime and Experiment Builder which requires files in AVI format (AVI-XVid). The files are quite small already (various 2 second clips under 1mb), but are still too large which crash the ...
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0answers
144 views

FFmpeg Throws Errors When Converting 7.1 TrueHD (Blu-ray Audio) To PCM Or FLAC

I have attempted to convert a TrueHD stream to PCM as well as FLAC. Throughout the encoding process, errors occur: "lossless check failed" and others. The same set of errors occurred when converting ...
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0answers
110 views

FFmpeg loop filter doesn't work

This is a follow-up from my previous question here. Basically, I'm trying to use FFmpeg's loop filter to freeze some frames and insert black frames. It's very weird; I swear it was working a few days ...
0
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1answer
151 views

Where are the Source Scaling Options in Adobe Media Encoder CS6?

In Adobe Media encoder CC, the Settings in the drop-down menu have a Match Source option that will preserve the pixel size of the file. In this Adobe Help article, the authors of the page state that ...
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0answers
27 views

correct OpenShot settings to avoid the jitters

This video with spaceship building instructions was made with OpenShot. It is jittery. It was shot with a Samsung Galaxy S9. Here are the details I dug up from the source and final video: | Thing ...
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1answer
261 views

Fast VP9 still image encoding

I use this command to create "myFile.webm", a VP9 video with one still image : $ ffmpeg -i myOriginialPureAudioFile.opus -loop 1 -i myAudioFile_640x360.png -shortest -threads 4 -speed max -c:a copy ...
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2answers
348 views

FFmpeg for m2t and Sony Bravia - not working

-f mp4 -c:v libx264 -preset veryslow -tune grain -profile:v high422 -flags +ildct+ilme I am preparing video to be streamed (DLNA) from my NAS to an older Sony Bravia. I have successfully created ...
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0answers
618 views

Replacing I-frames in h265 stream

I'm trying to follow this tutorial: https://www.reddit.com/r/brokenanimegifs/wiki/tutorial Everything works perfectly. On the basis of this tutorial, I even created my own little tool. It just ...