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

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2
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5answers
89 views

Live streaming to a disk

Not sure if this is the right place to ask this question (pretty technical), but I thought I'd start here. I'm interested in building a website that will have a streaming-video feature. It's not ...
0
votes
2answers
250 views

What are supported stream formats for h.265

I wanted to know what are the possible streaming formats for streaming a video using H.265. Does H.265 support rtsp and rtmp based streaming? Currently, I am using ffmpeg to live stream the camera ...
3
votes
1answer
29 views

Trading off resolution vs quality

I have some 720p 30FPS H.264 video that I want to downsample for online backup. I want to get to somewhere around 10% to 20% of the existing size, which will evidently require a large sacrifice in ...
1
vote
1answer
158 views

Removing MP4 encoding information

Is it possible to remove certain information form a MP4 file? Specifically things like tagging and encoding dates, Writing library and application, Encoding settings... No client needs to know when I ...
1
vote
1answer
136 views

How to prevent lossy re-encode of low-bitrate videos uploaded to YouTube

I have a huge number of low-res Flash videos (480x270, 30 fps, 800 Kbps) and I want to resample all those videos in 1280x720 with some added spatial sharpening and lomo filters to make them look nicer....
0
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1answer
39 views

How to create MPEG-DASH variants at resolutions where one dimension is not a whole number in pixels?

I've created a bunch of variants and a DASH manifest for Sintel, which more or less works, but does not pass validation. The issue is when I want to scale a video to a specific width, but the height ...
0
votes
1answer
27 views

Batch encode to X265 on the Mac

I need to encode thousands of MP4 H264 (mostly) files in a folder hierarchy to H265. Unfortunately Handbrake that I'd normally use have dismal support for batch processing of hierarchies. The ...
3
votes
0answers
69 views

Netflix encoding system - MAPLE

I understand that Netflix does all their encoding in AWS using EC2. They have a custom encoding software called MAPLE that chunks all source video into 2-3 second chunks and encodes in multiple codec ...
2
votes
0answers
78 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 ...
2
votes
0answers
77 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
votes
0answers
124 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
votes
0answers
31 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
votes
0answers
737 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
votes
0answers
74 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 ...
1
vote
0answers
38 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 ...
1
vote
0answers
266 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 ...
1
vote
0answers
268 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 ...
1
vote
0answers
160 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 ...
1
vote
0answers
835 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. ...
0
votes
0answers
8 views

HandBrake Not Allowing Multiple File Encodings at a Time

(Note that this question is similar to a question that I posted on the Linux stack exchange, but I figured it would be more appropriate to ask it here.) I've been trying to get HandBrake to convert ...
0
votes
0answers
14 views

Change the slice mode during the encoding in H.264

I'm working in implementing a back pressure mechanism between to locutors in a video comunication to manage the bandwidth consumption. Does the slice modes and the rc modes affects the packets size ...
0
votes
0answers
111 views

x265 encoding test: 12bit results a bigger file size than 8bit of the same config?

Just got curious of this x265 HEVC format, and tried it on a 1920x1080i BDMV stream video, one encoded with 8bit depth and then another encoded with 12bit depth. The results are, the 8bit output was ...
0
votes
0answers
43 views

How did PayPal get this video's file size so small?

This video from PayPal is 10 seconds long, 1280x720, and 23.976 FPS. The webm version is 485 KB and the mp4 version is 340 KB! I realize that there's not a lot of motion going on in the video and ...
0
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0answers
6 views

3D Studio Max on AWS EC2 recommendations

Anyone using 3D Studio Max in AWS EC2 on G2 instances what is the performance and point of views and suggestions
0
votes
0answers
359 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"...
0
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0answers
48 views

H264 vs H265 encoding time issues using B-frames

I run video encodings using H264 and H265. In H264 using JM reference software GOPs having B4 need greater encoding time than having B2, and GOPs having B2 need greater encoding time than B0. In ...
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votes
0answers
20 views

Why is this mp4 file corrupted?

I recorded this file by an Android encoder, but after a while the video gets corrupted. However re-encoding with FFMPEG fixes it. But I'd like to know what's wrong with the original file. http://...
-1
votes
0answers
21 views

Dash player stalls on high bitrate video

I transcoded Sintel for Dash using the commands below. Everything seems fine, except the Dash.js Reference Player stalls at 3:30 - I run it on a local HTTP server with a clone of their Github project -...