[FFmpeg-devel] [PATCH] libavcodec: add editpts bitstream filter [v4]

Andreas Håkon andreas.hakon at protonmail.com
Tue Sep 3 10:06:20 EEST 2019


Hi,

Ping, ping! (another time).

Please take note of these three points:

1. Lip-Syncing is a relevant topic in the AV editing area. Almost all professional video editors have
the functionality to realign audio with video. And at time the ffmpeg project lacks for a lipsync
bitstream filter. For this reason, this new filter is relevant. Although it can also be used for other purposes.

2. This is the fourth iteration of the patch, and it incorporates all suggested requests. So it's ready
for review and acceptance.

3. Although the current implementation can be improved (using, for example, values expressed in
nano-seconds), it's preferable to first add it and then improve it.

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Tuesday, 27 de August de 2019 11:02, Andreas Håkon <andreas.hakon at protonmail.com> wrote:

> Hi,
>
> Ping!
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>
>> On Friday, 16 de August de 2019 12:19, Andreas Håkon <andreas.hakon at protonmail.com> wrote:
>>
>>> Hi,
>>>
>>> The latest version ready to merge of the bitstream filter "editpts".
>>> Implements all requests.
>>>
>>> This supersedes:
>>>
>>> https://patchwork.ffmpeg.org/patch/14302/
>>>
>>> https://patchwork.ffmpeg.org/patch/14195/
>>>
>>> https://patchwork.ffmpeg.org/patch/13743/
>>>
>>> https://patchwork.ffmpeg.org/patch/13699/
>>
>> And I explain the reason for this filter:
>> - When there is a slight misalignment in some stream, for example a lipsync failure,
>> it's possible to compensate such misalignment without having to recompress any stream.
>> Just by applying this filter you can do all the work.

I hope it will be reviewed and accepted soon.
Regards.
A.H.

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