[FFmpeg-user] How to download and transcode video stream to mp4 and save the TS stream to file at the same time?

[Ferdi Scholten]

On 30-09-2024 18:03, Bo Berglund wrote:
> On Mon, 30 Sep 2024 20:36:04 +0530, Gyan Doshi <ffmpeg at gyani.pro> wrote:
>
>>
>> On 2024-09-30 05:46 pm, Bo Berglund wrote:
>>> On Mon, 30 Sep 2024 13:40:44 +0530, Gyan Doshi<ffmpeg at gyani.pro>  wrote:
>>>
>>>> On 2024-09-30 01:34 pm, Bo Berglund wrote:
>>>>> I checked with CharGPT and got the following:
>>>>>
>>>>> [quote]
>>>>> The hybrid_fragmented flag was added to FFmpeg in version 6.0, released on June
>>>>> 5, 2024. This feature allows for the creation of hybrid
>>>>> fragmented/non-fragmented MP4 files, which can be useful for ensuring file
>>>>> readability even if writing is interrupted
>>>>> [/quote]
>>>> This is wrong. The flag is not in any existing build. It will be in 7.1
>>>> due to be released within a day or so.
>>>>
>>>> Regards,
>>>> Gyan
>>> Strange, when I go to the official website:
>>>
>>> https://www.ffmpeg.org/ffmpeg-all.html#Options-56
>>>
>>> then I find a section about this flag in "21.4.2 Options"...
>>>
>>> movflags -> hybrid_fragmented
>> Sorry, that was a typo. s/existing build/existing release. But anyway,
>> 7.1 was released a few minutes after I sent that reply. It's in there.
>> Regards, Gyan
> OK, so in that case back to how one can get it onto ones Linux system?
>
> I have now also tried on a Raspberry-Pi5B, which runs the fully updated most
> recent operating system PiOS (Debian based, I guess).
>
> I did a test with this:
> - sudo apt update (showed 190 packages to upgrade)
> - sudo apt full-upgrade (this upgraded ffmpeg too)
>
> Then I made a copy of my stream download script where I added the extra
> parameters to the ffmpeg call at the end just before the output file name:
> -movflags +frag_keyframe+hybrid_fragmented
>
> Everything else untouched.
> Then I used the script to download a 30 s test sequence.
> But then ffmpeg threw and error and quit with this at the end of the run:
>
> [mov/mp4/tgp/psp/tg2/ipod/ismv/f4v muxer @ 0x55559f9f4fb0] [Eval @
> 0x7ffffa717520] Undefined constant or missing '(' in 'hybrid_fragmented'
> [mov/mp4/tgp/psp/tg2/ipod/ismv/f4v muxer @ 0x55559f9f4fb0] Unable to parse
> option value "hybrid_fragmented"
> [mov/mp4/tgp/psp/tg2/ipod/ismv/f4v muxer @ 0x55559f9f4fb0] Error setting option
> movflags to value +frag_keyframe+hybrid_fragmented.
> Could not write header for output file #0 (incorrect codec parameters ?):
> Invalid argument
> Error initializing output stream 0:0 --
>
> So clearly this version of ffmpeg does not support the argument.
>
> Output starts with this:
> ffmpeg version 5.1.6-0+deb12u1+rpt1 Copyright (c) 2000-2024 the FFmpeg
> developers
> built with gcc 12 (Debian 12.2.0-14)
>
> So is there a way (not involving self-compiling ffmpeg) to get the latest
> version on board?
>
> Just wait some weeks perhaps?
>
>
Well, if you are on Ubuntu, you'll have to wait at least until they 
release 25.04 to get the ffmpeg that was released today. The feature 
freeze for 24.10 has already passed so it will have the previous version.
You could wait for a static build and download that. Self compiling 
remains the best and fastest way to get the current release.