[FFmpeg-user] Alternative to Dynamic Text

[Gyan Doshi]

On 2021-11-07 12:06 pm, LianCheng Tan wrote:
> Hi Gyan,
>
> Will it be added in the next release of ffmpeg?

No guarantees but I'll aim for that.

Regards,
Gyan

>
>
>> On 7 Nov 2021, at 1:08 PM, Gyan Doshi <ffmpeg at gyani.pro> wrote:
>>
>> 
>>
>>> On 2021-11-07 03:58 am, Anatoly wrote:
>>> On Thu, 4 Nov 2021 20:14:16 +0800
>>> LianCheng <tanlccc at gmail.com> wrote:
>>>
>>>> Yes, would like to know in ffmpeg, under drawtext, the textfile
>>>> (reload=1) is using read-write or read-only mode?
>>> I think "procmon.exe" from Microsoft
>>> https://docs.microsoft.com/en-us/sysinternals/downloads/procmon
>>> can help you to find the answer (and maybe somehow "debug" the
>>> situation).
>> FFmpeg opens the file with O_RDONLY mode.
>>
>>> Btw, I think following approach may help (or may not, I have no windows
>>> system by hand to test it myself). Let's say I want to atomically
>>> replace file a.txt with file b.txt
>>> mklink /h wrk.txt a.txt
>>> open wrk.txt with ffmpeg
>>> update b.txt as needed
>>> mklink /h next.txt b.txt
>>> move /y next.txt wrk.txt
>>> now update a.txt as needed or may delete a, b and create new b.
>>> hardlink again and move again
>>> and so on in loop
>> This can work until it doesn't. The filter doesn't tolerate any load failures.
>> I'll see if I can add a short sleep and retry. If it still fails, we continue with the old text.
>>
>> Regards,
>> Gyan
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