I am using ffmpeg to live transcode multicast transport streams. I am trying to
transcode some music channels that only send out video frames like every 10
seconds or so, and play audio constantly.
When ffmpeg uses the video from that stream (mpeg2) and the audio from that
stream (AC3) ffmpeg s
I'm testing out an Intel Flex 140 card and I am attempting to transcode 4
inputs to 1 output using the xstack_qsv filter. My command takes in 4 udp
multicast ts files (h264 encoded) and outputs one h264_qsv encoded udp
transport stream. My command looks like so:
/tmp/ffmpeg_g -nostats -logl
t
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On Wed, 27 Dec 2023 at 18:40, Shane Warren wrote:
>
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I ingest some multicast video that has a53 captions embedded in h264 video, the
video claims to have a framerate of 29.97 but it must not quite be that because
ffmpeg duplicates frames when transcoding this stream. The output stream has
a53 captions, but they appear to be somewhat garbled, like
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Hi Shane,
On Fri, May 3, 2024 at 5:48 PM Shane Warren wrote:
>
> I ingest some multicast video that has a53 captions embedded in h264 video,
> the video cl
I am transcoding live video using intel flex 140 cards, and the video mostly
stays one resolution/framerate but sometimes ads come in that are in different
resolutions, and that either crashes ffmpeg (in libmfx) or stops ffmpeg.
For example, an input stream starts out at 1280x720p@60 then eventu
-Original Message-
From: ffmpeg-user On Behalf Of Wang, Fei W
Sent: Wednesday, September 4, 2024 3:11 AM
To: ffmpeg-user@ffmpeg.org
Subject: Re: [FFmpeg-user] Intel QSV Transcoding Stops on Resolution Change
> -Original Message-
> From: ffmpeg-user On Behalf Of
> -Original Message-
> From: ffmpeg-user On Behalf Of Dennis
> Mungai
> Sent: Monday, October 14, 2024 4:50 PM
> To: FFmpeg user questions
> Subject: Re: [FFmpeg-user] Intel libmfx Crash with Hardware Decoding
>
>
> On Mon, 14 Oct 2024 at 18:57, Shane War
-Original Message-
From: ffmpeg-user On Behalf Of Dennis Mungai
Sent: Monday, October 14, 2024 4:50 PM
To: FFmpeg user questions
Subject: Re: [FFmpeg-user] Intel libmfx Crash with Hardware Decoding
On Mon, 14 Oct 2024 at 18:57, Shane Warren wrote:
>> I have a system with Inte
bit more cpu.
An extra question is: Will the QSV hardware decoder ever support passing
through a53 captions?
Thanks,
Shane Warren
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ore features.
Are there any downsides to using vaapi over qsv? I just want something that
works and produces good quality transcoding.
Thanks,
Shane Warren
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o.1.2.10
>> > >>
>> > >> Is there a way to get symbols for libmfx so I can get a better
>> > >> bug report, or some suggestion on how to debug this.
>> > >>
>> > >> I have switched this stream to software decoding then QSV
> > -Original Message-
> > From: ffmpeg-user On Behalf Of
> > Dennis Mungai
> > Sent: Monday, October 14, 2024 4:50 PM
> > To: FFmpeg user questions
> > Subject: Re: [FFmpeg-user] Intel libmfx Crash with Hardware Decoding
> >
> >
>
I'm trying to figure out how to solve an issue I have. I bring in live
multicast streams into ffmpeg then hardware transcodes to 1-N output multicast
streams. Normally the lag from input->output is a few seconds. Sometimes
though, I've seen streams that are like 10-30 minutes behind the input st
-Original Message-
From: ffmpeg-user On Behalf Of Shane Warren
Sent: Tuesday, November 26, 2024 1:35 PM
To: FFmpeg user questions
Subject: Re: [FFmpeg-user] Nvidia Transcoding: Failing Using xstack (When
Running Under systemd)
On Tue, 19 Nov 2024, 01:20 Shane Warren, wrote:
>&
On Mon, 18 Nov 2024, 11:33 pm Shane Warren, wrote:
>> I have been trying to track down why when transcoding using xstack
>> with nvidia decoding and encoding I get strange decoding issues in ffmpeg.
>>
>> Note: I use 2 1 minute long .ts files for this example if you want
I have been trying to track down why when transcoding using xstack with nvidia
decoding and encoding I get strange decoding issues in ffmpeg.
Note: I use 2 1 minute long .ts files for this example if you want my inputs,
they are available here (as input1.ts and input2.ts) :
https://drive.google
On Tue, 19 Nov 2024, 01:20 Shane Warren, wrote:
>> On Mon, 18 Nov 2024, 11:33 pm Shane Warren, wrote:
>>
>> >> I have been trying to track down why when transcoding using xstack
>> >> with nvidia decoding and encoding I get strange decoding issues in
&g
This email originated from outside Innovative Systems. Do not click links or
open attachments unless you recognize the sender and know the content is safe.
On Tue, 19 Nov 2024, 01:20 Shane Warren, wrote:
>> On Mon, 18 Nov 2024, 11:33 pm Shane Warren, wrote:
>>
>> >&g
I am transcoding live multicast using hardware (decoding using nvidia and
encoding using nvidia (h264_nvenc) and going out multicast at fixed framerate
and constant bitrate. Normally the output is about 3-5 seconds behind the input.
I have some streams that cause the output to eventually get min
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