[FFmpeg-user] Help, Transcoding video

Carl Eugen Hoyos ceffmpeg at gmail.com
Wed Jan 23 16:30:08 EET 2019

2019-01-23 15:12 GMT+01:00, NDJORE BORIS <ndjoreboris at gmail.com>:

> I want to encode two times my input video file while decoding it juste one
> time.
> I use doc/examples/transcoding.c
> <https://ffmpeg.org/doxygen/trunk/doc_2examples_2transcoding_8c-example.html>
> What I want to do is to decode and encode like the transcoding.c examples
> does.
> Then, when I finished the decoding and encoding loop (while(1)).
> I want to call only the encoding function again in an other loop to encode
> a second time without
> decoding.
> Ex:
> First time :
> while(1)
> {
>        if (there is a frame in the input file)
>         {
>               decode input video;
>               encode output file;
>               next streamindex;
>          }
> }
> Second time :
> while(1)
> {       encode another outputfile;
> }
> What I want to know, is if it's possible to do that (decode only one time
> an input file in a whille loop and encode it two times).

> If yes, can you tell me how to do it ?

Initialize two encoders and call both encoders (one after the other)
in above existing loop.
Please also see http://ffmpeg.org/contact.html#MailingLists - you
did not post on the right mailing list, use libav-user.

Carl Eugen

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