All Questions
49
questions
1
vote
0
answers
49
views
ffmpeg doesn't have access to qsv nor vulkan
I'm running gentoo, and I have media-libs/oneVPL-intel-gpu installed, and latest mesa drivers, and intel gmm, however, qsv refuses to transcode and gives me the following error everytime
ffmpeg -...
- 11
0
votes
1
answer
71
views
How much and what data is lost in ffmpeg transcoding? [closed]
I'm a ffmpeg noob, I don't know much about it except for a basic idea about encoding/decoding and a few videos I watched over youtube about it's usage. I also don't have a big background in digital ...
- 11
0
votes
0
answers
75
views
ffmpeg package loss during *local* transcoding
I'm trying to transcode videos with outdated codecs/containers, mostly .wmv or .avi files.
The following ffmpeg (v6.1.1) command works and produces a working .mp4 file that doesn't seem to present any ...
- 101
0
votes
0
answers
120
views
FFMPEG: transcode interlaced J2K
i've been tasked with developing a solution using ffmpeg that will transcode archival videos into FFV1. the videos are all JPEG2000, but some are uncompressed and others are compressed. as the ...
- 141
0
votes
1
answer
244
views
Green pixelated issue when applying -vf flag to ffpmeg hls transcoding
I'm trying to create chunks of multiple bitrates to play them smoothly across various devices and bandwidth.
But the ffmpeg command output is creating green pixelated video. If I remove the -vf flag ...
- 101
2
votes
0
answers
499
views
ffmpeg cli settings for the most accurate seeking in the output video
I have a problem with video encoding for HLS stream.
I've found that most video players not support frame accurate seeking or pausing at specific frame and they can't really give us the accurate ...
- 35
1
vote
0
answers
445
views
av_interleaved_write_frame(): Cannot allocate memory, Error writing trailer of udp
I'm transcoding from udp input to mpegts udp output. After several hours ffmpeg used all ram memory. I don't know where the problem is.
Command:
ffmpeg -hwaccel vaapi -hwaccel_output_format vaapi -i &...
1
vote
0
answers
235
views
FFMPEG: Sony IPCM 24bit four channel Audio and Final Cut Pro x from Sony A7S III or FX3
I just got a new camera that uses IPCM Files for four channel audio 24 bit tracks in the video. Is there a way to BATCH-rewrap those files so that they are readable in Final cut for example.
There has ...
user1682242
1
vote
0
answers
458
views
Ffmpeg: Is it possible to use -itsoffset option without transcoding for live RTMP streams?
I am using -itsoffset option for delaying the video track of a live RTMP stream by few seconds but the problem is that I must use -c:v libx264 or other codecs, I cannot use -c:v copy, I want to use ...
- 130
0
votes
0
answers
1k
views
What is the suitable H/W compatibility for av-1 encoding
Some videos are transcoded, h264 on ARM machine, h265 on Intel Skylake and av-1 on Intel RocketLake. File savings are better with av1 at the same quality but still at a high computational cost.
Avg ...
- 19
0
votes
1
answer
460
views
FFmpeg transcode piped mp4 with MOOV at end - but I can read it twice
I need to transcoding an MP4 file using that I can only access via a stream. The MOOV atom is at the end of the file. I do not have the ability to seek to a specific part of the file, only read a pipe ...
- 101
5
votes
2
answers
9k
views
Parallel transcoding with FFmpeg on M1 Mac
I'm trying to determine how effective an M1 Mac would be for transcoding video using FFmpeg (specifically resizing and adjusting bitrate). I can do single transcodes using a command like this:
ffmpeg -...
- 51
1
vote
1
answer
322
views
how to convert a given video file to all possible codec/container format combinations
I posted the same question in Video Production StackExchange site 8 days and there is not even a single answer to that up till now. So now I decided to try my luck here in Superuser site.
My semi-...
- 213
0
votes
0
answers
34
views
FFMPEG - audio crackling when merging wav files [duplicate]
i'm merging two audio files into 1 with a acrossfade filter.
Here is my acrossfade filter config: acrossfade=d=10:o=1:curve1=cbr:curve2=cbr;
The merge is working well for .mp3 files, but when one(or ...
- 1
0
votes
0
answers
291
views
FFMPEG - Merging .wav files with acrossfade and getting audio crackling
i'm merging two audio files into 1 with a acrossfade filter.
Here is my acrossfade filter config: acrossfade=d=10:o=1:curve1=cbr:curve2=cbr;
The merge is working well, but for some files it results in ...
- 1