Questions tagged [lossless]

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How do I get better sound quality when screencasting with ffmpeg without having to increase -r?

I wrote the following script to capture both the screen and the audio from the microphone, both lossless from my laptop: #!/bin/bash d=$(date +"%Y%m%d_%-H%M") dimensions=$(xdpyinfo |grep ...
John Smith's user avatar
0 votes
1 answer
537 views

frame rate vs extracted frames

Newbie here. This is my input.mp4 video, according to VLC: codec: H265 – MPEG-4 AVC (part 10) (avc1) Encoder: Lavf58.29.100 FPS: 70.476432 Resolution: 1824 x 1216 Duration: 0m31s I need to ...
terauser's user avatar
0 votes
2 answers
794 views

lossless frame extraction from video

I have an mp4 video file with these characteristics: -Encoder: Lavf58.29.100 I want to extract each frame as an image, with the following requirements: one image file is one frame (i.e., account for ...
terauser's user avatar
0 votes
2 answers
156 views

Lossless masking of MP4/h.264

I am familiar with the UNIX command jpegtran which supports the wipe (1) command line option for JPEG (ITU.81) format. Using ffmpeg one can losslessly encode a jpg image sequence to a MJPEG video. I ...
malat's user avatar
  • 256
1 vote
1 answer
2k views

Merge / Concatenate Video Files in a Lossless Manner (No Encoding / Compression)

I have few video files I'd like to merge. I'd like to create a single video of them without any compression, just one after another. How can it be done using FFMPEG? For the answer we may assume the ...
Royi's user avatar
  • 121
1 vote
1 answer
285 views

High losing of quality after rendering sony vegas pro 17

I am rendering a video of resolution 2704 x 1520 of 50 FPS on sony vegas. Here are the parameters of the videos : I'm trying to render for a clip video on youtube. However I have an important loss of ...
ImNeos's user avatar
  • 111
2 votes
1 answer
30 views

Reverting Loss from .MOV (MPEG-4 Compression)

I was wondering if it is possible to revert the loss that was caused by MPEG-4 compression. I had HD quality images and our colleague made the grave mistake of converting these HD images into a "....
Jaegermeister's user avatar
2 votes
1 answer
167 views

Concatenate H.264 raw but basic streams without reencoding or quality loss

How does one go about concatenating several H.264 raw streams into one without reencoding or quality loss? The streams lacked any advanced features and represented contuous recording. There is no ...
TAbdiukov's user avatar
  • 209
0 votes
1 answer
584 views

How to convert the DVD .VOB collection to MPEG without re-encoding (and quality loss)?

How to convert the DVD .VOB collection to MPEG without re-encoding (and quality loss)? The .MPEG files are what DVD format is built upon, the singular files are easy to handle, and overall, can be ...
TAbdiukov's user avatar
  • 209
3 votes
2 answers
3k views

How to cut MPEG and H.264 files frame-accurately without re-encoding?

Occasionally, the video-files need to be cut to keep only the relevant parts. Thus, how does one go about cutting the common video files (H.264, MPEG) without any re-encoding and thus quality loss?
TAbdiukov's user avatar
  • 209
8 votes
1 answer
6k views

Lossless convert 3gp video to mp4 using ffmpeg

I'm trying to get lossless conversion of 3gp to mp4 using ffmpeg. I tried ffmpeg -i input.3gp -vcodec h264 -c:a aac output.mp4 I tried with "libx264" for the video codec, I tried just a ...
D. Joe's user avatar
  • 183
3 votes
2 answers
1k views

Is CABAC encoding lossy or lossless in ffmpeg?

I've been looking into how to compress a video using ffmpeg when I stumbled across CABAC encoding which I could specify by using the libx264 for the video codec and pairing it with the proper ...
Juhmer_Tena's user avatar
7 votes
3 answers
5k views

Using ffmpeg to add height (as black bars) to video file without quality loss

I have a file of resolution 3840x1632, but my TV stretches the picture vertically to fill up all 2160 pixels of height. Is it possible to use ffmpeg to add blank / black height, while preserving the ...
Rosella's user avatar
  • 71
0 votes
2 answers
7k views

Convert variable framerate ~60 FPS to constant 60 FPS losslessly

I have gameplay footage recorded with ShadowPlay (“GeForce Experience”) at 60 FPS, which as I understand results in variable frame rate, because the game drops frames sometimes. However, trying to use ...
Zdeněk Gromnica's user avatar
31 votes
2 answers
58k views

Convert mp4 to webm without quality loss with ffmpeg

What is the best way to convert a mp4 file to webm without quality loss (using vp8 or vp9) with ffmpeg? If I do ffmpeg -i in.mp4 out.webm the quality is very bad. I can specify a target bitrate via -...
student's user avatar
  • 491
1 vote
1 answer
2k views

x265: Is it possible to re-compress HEVC video without quality loss?

My situation: Transcoding 1080p bluray videos to HEVC. Audio untouched; My rig is old (pre-2012) and to speed up the process I'm using --preset ultrafast; From x265 documentation, I understand that ...
Yifeng Mu's user avatar
  • 113
9 votes
7 answers
4k views

Lossless screen-recording software

For a small project of mine I want to record short screen-casts which show features of my program. Currently, I'm using a small app on my Ubuntu box which creates directly animated gif output. The ...
halirutan's user avatar
  • 195
5 votes
3 answers
3k views

creating a lossless mp4 screencast

I'm trying to create a screencast for playback on the web. Would like to use h.264, webm, and ogg. The source files are in the Apple Animation codec, and they look perfectly accurate. However when I ...
ben's user avatar
  • 51