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

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2
votes
1answer
184 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
0answers
5 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 ...
0
votes
0answers
11 views

Relation between computation power, visual quality and file size

want to encode many video, that can decode and play on a low-end machine. am not sure what algorithm and parameters to adopt. want the worst visual quality, utilize computation power not exceeding ...
2
votes
0answers
15 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 ...
9
votes
3answers
15k 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 ...
9
votes
1answer
3k views

What bunch of ffmpeg scripts do I need to get HTML5-compatible “Video for everybody”?

What list of commands should I do in ffmpeg/mencoder/some_other_CLI_app to get a video in all the right formats to use Video for Everybody? i.e. Is there a subtlety that prevents there being a ...
0
votes
1answer
27 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
48 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
53 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 ...
1
vote
1answer
90 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 ...
7
votes
2answers
2k views

How do I use my GPU to accelerate video encoding?

I have an ATI Radeon HD 4870 graphics card. I have read that I can use this to significantly speed up encoding DVD to AVI. Does anyone know how this can be done?
0
votes
1answer
53 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
139 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 ...
4
votes
4answers
5k views

How to make Handbrake preserve capture time / creation time?

Handbrake is an awesome video compression tool, but it doesn't seem to preserve the original capture time after a video is compressed. Any idea how to fix this?
0
votes
1answer
152 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
63 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 ...
4
votes
4answers
13k views

How to specify audio and video bitrate

I have a mov file with the following media information: Stream 0 Type: Video Codec: H264-MPEG-4 AVC (part 10)avc1 Language: English Resolution: 1280x720 Frame rate: 24 Stream 1 Type: Audio Codec: ...
4
votes
1answer
4k 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 ...
5
votes
2answers
10k 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 ...
2
votes
1answer
572 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 ...
1
vote
1answer
962 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 ...
3
votes
3answers
5k views

Reduce size of MP4

I have a MP4 file with a lengh of 22:44. Here are the details: Video: width: 720 px height: 404 px data bitrate: 1022 kBit/s overall bitrate: 1182 kBit/s fps: 24 codec: H264 - MPEG4 AVC ...
0
votes
0answers
22 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 ...
0
votes
1answer
407 views

How to change display ratio of mp4 movie without reencoding

Is there any way to resize an mp4 video without reencoding it? I plan to do this in Ubuntu Linux 12.04 x86_64.
5
votes
1answer
10k views

Handbrake: How to retain sharpness when down-sampling video during an encode?

I have a bunch of 1280x720 resolution videos, but I really don't need to have that high resolution, so I thought of re-encoding and resizing them to 852x480 to save some space, but I noticed Handbrake ...
7
votes
2answers
7k views

Which resize algorithm to choose for videos?

I'm using VirtualDub for encoding with those settings. However I record my stuff in 1920x1080 and resize it down to 1280x720. Now the question: which algorithm should I choose when making a balanced ...
1
vote
1answer
119 views

Transcoding digital camera generated MOVs to AVI to reduce file size without compromising the quality further

My older digital camera used to make low quality 100MB+ (for 5 - 6 mins of video) MOV files for videos I took I have around 70GB of these videos and I would like to bring them into a managable size ...
1
vote
1answer
2k views

ffmpeg - creating DNxHD MFX files with alphas

I'm struggling with something in FFMpeg at the moment... I'm trying to make DNxHD 1080p/24, 36Mb/s MXF files from a sequence of PNG files. My current command-line is: ffmpeg -y -f image2 -i ...
4
votes
3answers
7k views

Opening a AAC/h264 file in Sony Vegas Movie Studio HD Platinum 11.0

I have encoded some videos using mencoder, with AAC and h.264. Sony vegas cannot open the files, without any explanation. Here is what Gspot tells me about the videos : To encode the videos I have ...
0
votes
1answer
24 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?
7
votes
9answers
1k views

Converting a video from VOB to AVI while making the file smaller

How do I convert a video from one format, in this case a .vob into another, say .avi? I have a DVD of 4.2 GB and would like to convert that to a smaller filesize and different format of an .avi file ...
10
votes
2answers
36k views

Convert AVI to MP4 keeping the same quality

I want to compress an AVI file to MP4 using an h.264 codec. I could not get the same quality. How can I compress it? Original Video: Original Video Screen: FFmpeg console output (ffmpeg -i ...
0
votes
0answers
477 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
288 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 ...
11
votes
4answers
43k views

How do I reduce the size of a huge MP4 video?

I paid $59.95 for Vimeo Plus only to find that there is a 1 Gigabyte limit on video size. I have a 4 GB MP4 video file that I shot with the HD Flip Mino. How do I reduce it to no more than 1 GIG ...
45
votes
6answers
46k views

Can HandBrake flip/rotate a video?

I'd like to use HandBrake to compress some video that was taken via a camera that was mounted upside down. I found a reference to a command-line rotate option, but I can't find it in the GUI. Am I ...
1
vote
4answers
2k views

Lossless compression for movie ISO files?

What is the most efficient compression format for ISO files created from DVD movies? I wouldn't mind compressing them one at a time or a whole group of them, whatever would save me the most space on ...
0
votes
0answers
31 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
35 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
419 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 ...
0
votes
1answer
405 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
2answers
7k 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
0answers
546 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 ...
8
votes
3answers
19k views

How can I re-encode H.264 video with minimal quality loss?

I have a lot of MPEG-TS files (.TS container but H.264 video) and playback is fine except that when you skip forward/backward or fast forward it's very sluggish and gets pixelated, etc. I've been ...
0
votes
1answer
221 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 ...
6
votes
4answers
20k views

How to losslessly combine multiple AVI files into a single file?

I would like to combine multiple movie clips with .mov and .avi extension into a single file. Is there any free software in the market that is good and able to perform that? Preferably that should ...
1
vote
2answers
1k views

v4l2 issues with webcam encoded to H.264

I am trying to send a H.264 webcam video feed over wifi to another computer using gstreamer. I am using this tutorial as a guide. I am using a Creative Live! Cam Connect HD as my webcam. The website ...
8
votes
2answers
8k views

FFmpeg drops frames when encoding a png image sequence into an x264 mp4 video

I'm trying to encode an image-sequence (frame0001.png, frame0002.png, ... , frame0160.png) into an x264 video using the following command: ffmpeg -i frame%04d.png -sameq -r 24 out.mp4 After ...
0
votes
1answer
134 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 ...
0
votes
0answers
385 views

What video codec over RTP protocol?

I 'm trying to achieve video streaming from a Linux server (ffserver) to a Windows client (VLC player). Although I made it over HTTP protocol, I want the multimedia to be transferred over RTP ...