Questions tagged [hevc]

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MKVToolNix Splitting and Joining Stutter

I've been trying to split a tv show episode into two seperate parts, but whenever I try to rejoin the split files, I get a pixelation look on the merge locations. I've been using MKVToolNix to try ...
0 votes
1 answer
65 views

Creating an 8K/4K video in ffmpeg from single image frame leads to video longer than audio

I want to make a video using a cover image and an audio file with the audio file as the length. What's the most optimal modern way to do this with new codecs and high resolutions? Reason why I want 4K/...
0 votes
0 answers
17 views

Impact of reencoding an HEVC file: How much loss if I do it in two steps, vs. going directly to a lower bitrate?

My scenario is as follows: Working with large original 8K file, captured at 100Mb/sec with hvec (h265) codec The file was reencoded at 50Mb/sec for a reasonable balance between size and quality Now ...
0 votes
0 answers
24 views

Inverse Telecine (IVTC) anime DVDs

Issue I have a bunch of anime I've ripped from DVDs and even BDs that are 480i. I want to upscale these videos with Topaz Video AI for higher quality on a big screen, but also because subtitles are a ...
0 votes
0 answers
50 views

Why does this HEVC HLS stream not play on browsers?

I have a HEVC HLS stream that does not play when I paste it e.g. in Safari. The video is encoded in HEVC and has a resolution of 4608x1728. The screen just stays black. The URL is: https://cdn2.taggy....
0 votes
0 answers
23 views

Help me with corrupt video mp42

Hello I have one corrupted video file created with Chinese Camera DV4K_V23. I created one small sample video from this camera and I uploaded it for someone to help me, to decipher exactly which ...
3 votes
1 answer
5k views

Nginx RTMP didn't accept HEVC h265 input format

I'm trying to created live event broadcast on my VPS server , to make the audience able watch my broadcast I use Nginx RTMP that's produce link at this format http://192.168.1.5:8080/hls/live.m3u8 ...
0 votes
0 answers
31 views

libx265 set 1 i_frame per x seconds and force all other frames to be b_frames

I'm trying to compress my content while preserving quality. I'm measuring the quality using Netflix's VMAF. Only focusing on HEVC and tried different parameters available for libx265 such as crf, two ...
0 votes
0 answers
16 views

Which will have better quality, an H.264 encoded video with higher bitrate or an H.265 with lower bitrate?

I got a cheap action camera that allows me to choose the encoding of the video being recorded between H.264 and H.265. When I set it to H.264, the video's bitrate is set to around 10,000+ kbps. When I ...
0 votes
0 answers
156 views

FFMPEG converts HEVC with Alpha mov to PNG sequence not work well

I have a mov file with HEVC with Alpha codec on Mac. The mov file has no background color, but have some foreground contents in it. I want to use FFMPEG to grab some PNG pictures from it. Following is ...
0 votes
0 answers
72 views

hevc transcoded video not playing in safari

I transcoded a video with ffmpeg to hevc using the below command. ffmpeg -i input.mp4 -c:v libx265 -crf 23 -preset medium -x265-params keyint=60 -c:a aac -b:a 128k -f hls -hls_time 10 -...
1 vote
1 answer
2k views

What does the tag "-tag:v hvc1" means?

I am using FFMpeg to compress a video to X265/HEVC. When I am doing it normally the converted video doesn't working on iPhone or iPad. But while I am using the tag - "-tag:v hvc1" in the ...
1 vote
0 answers
91 views

ffmpeg QP: AMD Radeon (Vega7) hevc_vaapi results in lager files than hevc_nvenc - why?

I've switched from an RTX 3070 to an AMD Radeon Vega7 APU (4600G/5600G). I'm trying to tweak the ffmpeg parameters, so that the transcode output results in a similar quality AND file size. hevc_vaapi ...
1 vote
1 answer
6k views

Adobe Premiere Pro no H265 export option?

I am using the trial version of Adobe Premier Pro (also tried Elements) and I noticed that there is no option to export as H265. Is there something i should do in order to enable this functionality? ...
0 votes
1 answer
2k views

FFMPEG - The result of converting video to hevc format lost audio (video only)

I'm new in programming, I have some movies and want to convert them to hevc format to reduce storage space but keep quality video, i tried with my code through ffmpeg: **for %b in (*.mp4) DO ffmpeg -...
2 votes
0 answers
1k views

Copy timecode from SEI Picture Timing to MXF Timecode Stream with FFmpeg

I am receiving an HEVC encoded live stream that contains SMPTE 12-1 timecode in the SEI picture timing, as it is recommended in ITU-T Rec-H.265-202108 Annex D.3.3 Picture timing SEI message semantics....
0 votes
1 answer
191 views

h264/hevc: non-integer frame rates

I'm having a hard time understanding how non-integer frame rates are implemented in h264 and hevc. For example, I just stepped through a 23.976fps video frame by frame using Shotcut, and looking at ...
3 votes
3 answers
4k views

Does HDR content have anything to do with codecs?

I am new to video codec(encoding/decoding) stuff. I am trying to understand the difference between H.264(AVC) and H.265(HEVC) HDR video content. I thought HDR video 'means' it has 10 bit color depth ...
1 vote
1 answer
314 views

HEVC vs H264 video file size

I am doing some experiments on the file size of recorded videos in HEVC vs the ones recorded in H264 using a simple Android app that I developed. My impression was that videos recorded in HEVC should ...
1 vote
0 answers
721 views

Decode Multi-Layer HEVC

I'm trying to decode an HEVC/H.265+ rtsp stream to an image using ffmpeg as follows: ffmpeg -rtsp_transport tcp -stimeout 10000000 -i 'rtsp://user:passwd@url:port/Streaming/tracks/101?starttime=...
1 vote
2 answers
3k views

Recompressing 1080p h264 collection to HEVC - Target Bitrate For Minimal Loss

My understanding is that HEVC (aka h265) can provide roughly the same video quality as h264 in roughly half the space, for 1080p+ footage. I have a large collection that I would like to re-encode to ...
0 votes
1 answer
604 views

ffmpeg produces the same output file with different bitrate settings

My input is an uncompressed video captured from old Hi8 cassettes, mediainfo: Format : RGB Codec ID : V_UNCOMPRESSED Codec ID/Info ...
1 vote
0 answers
70 views

Does exporting to lossless HEVC prevent loss when re-exporting an already exported video file?

Software: After Effects, Premiere Pro So I had a little bit of trouble with my main PC and can't get it fixed before the deadline of my client. I already had the final video ready and exported before ...
3 votes
1 answer
4k views

ffmpeg vf scale shifts colors to washed out

Im trying to scale video down. No matter what I do the colors are always washed up as a result. original: After scaling: Code I run for it ffmpeg -i input.mkv -vf scale=1028:-1 output.mkv log: log ...
3 votes
0 answers
149 views

How do I compress a video and preserve quality in moving areas?

It's easier to notice details in still objects compared to moving ones, so modern codecs save bandwidth by reducing detail during movement. However, this optimization seems far too pronounced to me ...
2 votes
1 answer
4k views

ffmpeg/x265: fixed-GOP, IDR only keyframes, repeating headers

I need to transcode a video to another one with the following properties: GOP size is always fixed at a given value Only IDR frames are used as key-frames (not I-slices) SPS/PPS/VPS frames are ...
3 votes
1 answer
1k views

What's special about Apple-device generated HEVC files that (apparently) x265 can't produce?

Take this file, the first 10s of Hank Green's "editing challenge". It is H264 video + AAC audio. You can take that file and import it into Final Cut Pro X (FCPX for short), and edit it to your heart's ...
0 votes
2 answers
51 views

How to transcode HEVC footage on a mac if you don't have CC2018 yet [duplicate]

Is there a good free way to convert iPhone HEVC footage to .mov prores or something similar using a Mac (MacOS 10.12) with Premiere CC 2017? Googling provides lots of unreliable looking apps from ...
2 votes
1 answer
196 views

Loseless conversion from IphoneX HEVC for PC - PPro

Looking for a ffmpeg command that would convert IphoneX HEVC 4K 25fps videos to any format that will work on PC - PremierePro and keep it lossless.
6 votes
1 answer
5k views

How does ffprobe identifies I frame and IDR, when it sets key_frame=1

How does ffprobe identifies I frame as an IDR and sets key_frame=1. Is it for the scene change? My requirement is to filter out IDR frames: the steps I am following are ffprobe output_file -...