Specific issues with encoding video to a certain format, also related to [video-conversion]

learn more… | top users | synonyms

2
votes
0answers
5 views

Error when adding silent channels to ProRes file in FFMpeg

I'm trying to follow this guide to build a usable 5.1 audio for a piece of hardware with specific needs. When I run the command: ffmpeg -ar 48000 -acodec pcm_s24le -f s24le -ac 5 -i /dev/zero -i ...
1
vote
1answer
20 views

why is mpeg4 encoder faster than libx264 using ffmpeg

I have been padding mp4 videos so they can become of the size 1920x1080 instead of 1920x800. I used initially used mpeg4 encoder using ffmpeg, the encoding was quick but the size of the file was more ...
0
votes
1answer
34 views

Merging four videos with different resolution in a Grid with ffmpeg

I want to marge four videos in to one as show below. I have achieve the correct output given all the videos have the same resolution. But I get an undesirable result with different resolution. See ...
0
votes
1answer
87 views

Setting the profile level for libx265 using ffmpeg

I'm trying to set the profile level of libx265 to mainstillpicture using ffmpeg. But I can't seem to do so. I'm basically trying to encode every frame as intra frame (only spatial encoding) with no ...
0
votes
1answer
98 views

Specifying parameters to create videos for ffmpeg's concat demuxer (to avoid a large re-encode)

ffmpeg can be used to concatenate files together: If you have media files with exactly the same codec and codec parameters you can concatenate them [...] (emphasis mine) My intention1 is to ...
0
votes
1answer
27 views

FFMPEG no audio in final output

I have the following FFMPEG command working. ffmpeg -y -i slide.mp4 -f lavfi -i "color=c=black:s=1920x1080:r=25:d=1" -filter_complex "[0:v] setpts=PTS-STARTPTS [main]; \ [1:v] ...
0
votes
0answers
42 views

Hardware video encoding with ffmpeg

I need to compress Full HD videos with ffmpeg with normal pc hardware. Encoding should be some sort of H.264 or Mp4 (quality wise). What hardware do I need for fast encoding times? Is a good CPU or ...
0
votes
1answer
100 views

How to generate thumbnail image from HandbrakeCLI command during conversion?

I have ffmpeg command line that creates thumbnail image from a video. This works nicely as I can choose the timestamp and the size of the image that I want. -r 1 -t 1 -ss 2 -s cga "%2/%32.jpg" This ...
4
votes
2answers
290 views

Re-encoding in FFMPEG using the exact same settings as the input file

I have a use-case where I take a few MPEG-4 files, trim them and concatenate them in to one file. I have a second use-case where one of those files are trimmed and also cropped/scaled, these files ...
0
votes
0answers
25 views

How to setup WDE-4220B ip video encoder?

I have WDE-4220B MPEG-2 Encoder with IP Output. Can anyone explain how should the setup/installation of this encoder be done? Obviously there is a software to use but I even don't know how to setup ...
0
votes
0answers
93 views

FFMPEG Lossless Video Output Options

I am looking for lossless video output options from FFMPEG that can be viewed without any special codecs or special players such as VLC. I want a basic use to be able to open up the video with a ...
0
votes
0answers
13 views

Megui shows error after avi upload

Hi Guys Im struggling with avi source into avisynth in Megui. I havent taken audio out but figured I could just put same file into audio input. However I read so many different solutions and I should ...
0
votes
0answers
97 views

Flash player seek not working when ffmpeg encoded with gop(-g) = 1

I am trying to deliver video content with frame-by-frame viewing via the SMP Flash player. For encoding, I am using FFMPEG with the x264 video codec for files with .mp4 containers. I am using the ...
3
votes
1answer
61 views

Does x264 support time-based rate control constraints?

I’m aware of techniques to give the encoder freedom to ramp up bitrate for relatively complex sequences, but this has the consequence of inflating the overall bitrate compared to whatever was desired ...
0
votes
1answer
49 views

DRM a Custom video

I have a video which is a matroska file (mkv). I wish to DRM protect the video to stop users from re-encoding the video or editing it. Meaning original video gets DRM: user can download video, ...
0
votes
3answers
107 views

combining 1 image + 1 audio using FFmpeg

I want to combine an audio file and one image file into a video. Output will be in .webm format so I will be using libvpx. The video must have one frame with the best/lossless quality. So far I have ...
0
votes
0answers
114 views

How can I make a video “seekable” using ffmpeg when played in VLC player?

I have a .mkv video with the following properties: Input #0, matroska,webm, from 'DEMO.mkv': Metadata: ENCODER : Lavf56.4.101 Duration: 00:00:56.37, start: 2.333000, bitrate: 2032 ...
2
votes
1answer
164 views

What ffmpeg command line produces video more compatible across all devices?

So i have users saying H264 videos MP4's dont play audio on Apple's IPad and i struggle to get MP4 videos to play properly on Android too. There are two different command lines what command line is ...
0
votes
1answer
58 views

Converting a large MP3 to video

I have 6 MP3 files that are between 1.2GB and 2.8GB in length. I also have 6 image files. I want to make 6 videos using those 6 MP3s and images. I have tried using uMusic to merge these and while ...
1
vote
1answer
300 views

Swapping index of an MP4 file with FFMpeg

I run a web application which provides a few videos on it. Those videos are being displayed with a flash-video-player. Unfortunately, the index of those container-files is at the end of the file, so ...
0
votes
1answer
659 views

ffmpeg says that “'.mkv' is not a suitable output format”

I have trouble with ffmpeg, I want to do a two-pass encoding, plus denoise and deblock if possible. This is a command I thought would work but I am getting all sorts of problems: ffmpeg -y -i ...
0
votes
1answer
141 views

Cut video after certain time?

So I have found out how to cut a video at a specific time frame by using the following command ffmpeg -i input.wmv -ss 00:00:30.0 -c copy -t 00:00:10.0 output.wmv ffmpeg -i input.wmv -ss 30 -c copy ...
0
votes
0answers
34 views

How to mix videos created by DosBox into a single video?

When recording gameplay videos. DosBox recording a separate video for each graphics mode. For example Descent switches graphics mode for each time you visit the auto map. So now I have 46 videos ...
1
vote
1answer
2k views

Nvidia CUVID video hardware acceleration

I have Nvidia Quadro NVS 140M GPU (G86) in my laptop. Last time when I was installing video codec pack I could turn on Nvidia CUVID hardware video decoder features at some point of configuration. I ...
0
votes
1answer
31 views

Is it possible for ffmpeg to encode with a spatially variable bit rate?

I would like to reduce the overall bitrate of a 4K 180 degree FOV video by decreasing detail outside of 60 degrees while retaining it in the center. Is that possible?
0
votes
0answers
566 views

Which settings should I use on VLC to transcode a video to play on Xbox 360?

I tried to convert a video on VLC a few times to play on Xbox but I can't find the right settings. I used a few formats specified in this page but they didn't work. I also found this page that ...
0
votes
0answers
439 views

DVD Flick Video Encoding is usually slow?

I tried to burn my movies using DVD Flick, but when it's burning, it takes so much time to encode the videos. I select the Bitrate as Auto Fit, and encoding as Normal. Is it normal to take so much ...
0
votes
1answer
57 views

Prevent Blur in Gameplay .mov

So I've been uploading videos of Hyrule Total War onto Youtube, but keep experiencing a bunch of blurring of my video when I move the camera. After recording in FRAPS, the raw footage looks perfect, ...
1
vote
0answers
42 views

DVD presence not detected until after Windows Update

I am running Windows 7 with Power DVD. I had a couple of DVDs and I googled to find that The Dark Knight Rises is particularly a frequent evidence the issue. When I insert the DVD into the drive, ...
0
votes
1answer
915 views

Missing reference frame, slice header decode error

I split this (http://www.auby.no/files/video_tests/h264_720p_mp_3.1_3mbps_aac_shrinkage.mp4) video using mp4box command "MP4Box -split 1 shrinking.mp4" into slices of 1 second each. I have following ...
2
votes
1answer
575 views

Encoding H264 with windows ffmpeg results in first few seconds being “blocky”

I am using the following code to transcode a 10mbps high quality 1280x720 H264 mp4 into a lower quality H264 mp4 with our logo watermarked on the video. ffmpeg.exe -i test.mp4 -i watermark.png ...
1
vote
0answers
685 views

Difference between downscaling 1080p to 720p in real time and downscaling during encoding?

Suppose a high quality, uncompressed video is re-encoded twice, with almost identical encoding settings at a relatively low bitrate of 4mbps, but at different resolutions, first at 1080p, and then at ...
2
votes
1answer
681 views

Is it possible to embed subtitles in an MP4 with the forced option in MeGui?

I want to show subtitles with my web player (it supports Flash and HTML5). I'm using the .mp4 format and I can add subtitles to the player with an external .srt file, but I want to embed subtitle to ...
0
votes
1answer
327 views

How to determine 'Output bit depth' of the libx264 library in ffmpeg?

According to the x264 Encoding Guide, the crf scale depends on whether x264 is 8-bit or 10-bit. Supposedly x264 --help shows the Output bit depth. But on Windows ffmpeg -h full doesn't say anything ...
2
votes
1answer
258 views

Why does FFmpeg segment_times create webm files with incorrect duration and start times?

I have a MOV file that I want to split into several smaller files (at certain timestamps in a comma-separated list). I'm simultaneously compressing the video into WEBM files. The command I'm using ...
0
votes
1answer
171 views

How does video encoding bitrate affect duration and why?

Does encoding an uncompressed video into a higher bitrate take longer (than into a lower bitrate)? If so, why - it seems that the encoder should need less effort because it doesn't have to compress ...
1
vote
2answers
8k views

How to download online videos [closed]

I have very low bandwidth available on my network. I don't want to watch the video online again and again. Instead I want to download the video for later use. I can download Youtube videos with some ...
1
vote
1answer
74 views

Ideal FPS to use

I have a C# desktop application and I am using ffmpeg as a way to 'zip' up a load of jpegs on the client PC and upload it to my server and unzip it. The number of jpegs to zip at any 1 time varies. ...
7
votes
1answer
7k views

Shouldn't we always use Web Optimized for Handbrake?

I use Handbrake sometimes to compress video files, and notice that the "Web Optimized" option is not chosen by default, and cannot be set to the default in Options either. But I tried both Web ...
2
votes
3answers
1k views

YouTube consistently messes up my video's quality

I'm having trouble encoding a video for YouTube. The content isn't very "compression-friendly" (it's Battlefield 4 gameplay footage), but I'm 100% positive the results could be better. Some links: ...
1
vote
0answers
36 views

“Freely positionable” Videos

The following is a requirement for loading a video into National Instruments DIAdem: The videos must be freely positionable, so that DIAdem can display each frame in the videos. Video - DIAdem 2012 ...
4
votes
0answers
1k views

ffmpeg minimal requirements configuration for encoding and decoding h264 files

I'm trying to compile ffmpeg with minimal requirements in order to encode/decode with h264. So far my command line configuration is : ./configure --disable-yasm --disable-everything ...
9
votes
3answers
23k views

How to generate an MP4 with H.265 codec using FFmpeg?

I want to encode a video file to H.265. The last version of ffmpeg should be support H.265 (Source). However, I could not find any information about the exact command. I do not know, which library I ...
0
votes
1answer
2k views

Fixing an unmuxed image/jpeg stream from webcam using gstreamer

I made a broken footage using the following pipeline: gst-launch-1.0 v4l2src ! filesink location=encode.mjpeg Somehow gstreamer can still play it back: gst-launch-1.0 filesrc location=encode.mjpeg ...
6
votes
1answer
3k views

How do I replace the audio in an MP4 file without re-encoding?

I've got a video in an MP4 container that I would like to replace the audio track in (not add another audio stream to, nor convert the audio format of). Someone elsewhere online suggested to use ...
2
votes
0answers
464 views

Converting series of images with ffmpeg results in black video

I've just downloaded ffmpeg since it seems to perfectly match my needs (make a video from a set of pictures). I'm currently playing around with some examples just to get started and there's something ...
1
vote
1answer
7k views

What are “levels” and “keyframe distance” when rendering video in Adobe Premiere Levels?

I would like to know what the render option called Levels is. Why should I change that to 5.1 or 1.0? What are those levels and how do they affect the final file (size, quality)? All the info I read ...
8
votes
2answers
13k views

How can I get high quality/low size MP4s like the LOL release group?

Release group LOL does an excellent job at encoding their releases on The Vampire Diaries (on other shows like How I Met Your Mother the bitrate is higher, so doesn't seem this effective). About 200 ...
5
votes
2answers
12k views

Converting AVI encoded file with an IMM5 codec

As part of a legal matter, I received a copy of a security video encoded using what appears to be an 'IMM5' codec, apparently often used by police. I also received a copy of 'BackupPlayer', which can ...
1
vote
1answer
500 views

FFMPEG keeps converting without stopping

I have a web application that converts videos and splits them using FFMPEG. It was working fine until recently I noticed that the videos were taking much more time converting than they are supposed ...