[FFmpeg-user] Frame rate doubled when using video copy codec(m2ts->mp4)

[Paul Atkins]

Hi Carl,

Thanks. I've just tried it with latest windows build from https://ffmpeg.zeranoe.com/builds/ (N-82966-g6993bb4) and it is the same. I've attached a small 2 second clip input.m2ts and output.mp4. 

Same command:
ffmpeg -i input.m2ts -c:v copy -c:a aac output.mp4
Same result.

Regards
Paul


-----Original Message-----
From: ffmpeg-user [mailto:ffmpeg-user-bounces at ffmpeg.org] On Behalf Of Carl Eugen Hoyos
Sent: 08 January 2017 12:26 PM
To: FFmpeg user questions
Subject: Re: [FFmpeg-user] Frame rate doubled when using video copy codec(m2ts->mp4)

2017-01-08 12:24 GMT+01:00 Paul Atkins <pdatkins at btinternet.com>:

> This works and produces a video which plays OK but there are some very 
> odd things with the frame rate, and other aspects that make it very

> hard to believe the video has just been copied into the new container 
> unchanged.

(No, this analysis does not really make sense.)

> Despite this the movie plays at correct rate!

Then a fix is not very likely.

> I'm sure it's not re-encoding
> the video as its quick (e.g. video stream is processed at roughly 15x 
> realtime), but it is doing something odd to change frame rate, and 
> size bit/rates as well.

Feel free to provide a short input sample.

For future questions, please remember to always test current FFmpeg git head before posting here.

Carl Eugen
_______________________________________________
ffmpeg-user mailing list
ffmpeg-user at ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".
-------------- next part --------------
A non-text attachment was scrubbed...
Name: input.m2ts
Type: video/vnd.dlna.mpeg-tts
Size: 3280896 bytes
Desc: not available
URL: <http://ffmpeg.org/pipermail/ffmpeg-user/attachments/20170108/34773006/attachment.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: output.mp4
Type: video/mp4
Size: 3101066 bytes
Desc: not available
URL: <http://ffmpeg.org/pipermail/ffmpeg-user/attachments/20170108/34773006/attachment.mp4>