Andy, Thanks for your response.

I can't address your issue exactly, although I find it odd to see you write "60i" in your subject line... the normal thing would be 30i (meaning 30* frames per second, each of which carries two interlaced half-frames, for a total effective rate of 60fps*).

I'm taking it from kdenlive, which defaults to a 1080 60i project. As you said, I should describe it as 30i.

However, it sounds like you have a similar problem to me, I have a Sony camcorder which produces HD content.

I discovered, thanks to the helpful people here, that FFmpeg can't scale interlaced content. You need to do that, or you will get combing, shadowed moving edges, or a jerky 30fps* result.

What about when you encode in 24p? I set my camera to 24p, and I'm getting the same result.

I switched to MEncoder, and got good results, primarily based on this:

http://lists.mplayerhq.hu/pipermail/mencoder-users/2006-March/002956.html

I suggest you do the same.

I'll give this a try and see if I can't find a good intermediate encode. Best, Jesse

Le 27 f?vr. 08 ? 01:51, Jesse Stroik a ?crit :

Herv?,

...

[...] try with "-vsync 2" should make the work (if I well understand the comment in the "ffmpeg- cvslog list") I didn't try it yet (but it was a recent commit in SVN) so if you don't have the current version, then make a new build and test it. (and give news ;-))

Yes, this seems much better. The video seems approximately the proper speed, but I'm still seeing a little a/v sync issue. I tried passing -r 60000/1001

??? like somebody previoulsy told to you: 60i in HD means 30i in SD (30frames per seconds, 2 fields per frames) so your framerate is 30000:1001 (and not the double!)

and didn't have any better luck with the slight sync issue.

try with -async 12345 too

In order to do any reasonable editing, I need to encode these files into something I can play in real time. An intermediate encoded is a necessary evil in this case, I think.

mjpeg codec is cool for fast encoding and realtime decoding at home (but produces hudge files). ffmpeg is very speed (encoding) with mpeg4 (and mpeg4 doesn't need as power as h264 decoding). bye Herv?

Dinesh, I ended up using the following mencoder line: ----------- mencoder -of mpeg -oac copy -mpegopts format=dvd:vaspect=16/9:vframerate=30 -fps 60000/1001 -ofps 30000/1001 -ovc lavc -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:keyint=18:vrc_maxrate=9800:vbitrate=6000:aspect=16/9 -vf scale=720:480 00077.mts -o 00077.mpeg2 ----------- Audio/video comes out perfectly doing this. Best, Jesse Dinesh Nadarajah wrote:

Jesse:

...

I've got a perfect video for testing a/v sync, and it comes out properly with mencoder.

Can you please post the command you used with mencoder to do this? I am having the exact same issue with ffmpeg when trying to transcode 1080i/60 video. The video plays back at half the rate of audio. This would be great if I can get this to work with mencoder.

Thanks.

-Dinesh

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Dinesh Nadarajah wrote:

Thanks. I will give it a try. Hope I can use a modified version for mpeg4/divx coding.

Try something like this: ----- mencoder -of mpeg -oac copy -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=7000:aspect=16/9 -fps 60000/1001 -ofps 30000/1001 -vf scale=1920x1080 <input> -o <output> ----- I created some mpeg4 stuff before i went to mpeg2, and for DVD resolutions I found the mpeg2 stuff better quality (I don't care about bitrate). It has the possible added advantage that I may be able to copy the video rather than encoding for some parts when I write to DVDs. I know you'd encode from 1440x1080 to 1920x1080 with the above line, but I think it makes sense to do the scaling in the video rather than counting on processing to scale later. This could be a completely naive way to do it -- I'm completely new at processing video and ffmpeg, in particular, is very good at abstracting away the complexity. Best, Jesse

hi all I just had an querry how to watermark while encoding on the top rigt corner wkth ffmpeg. While using the -vhook I get the watermark on all the video screen and the video quality is degraded thanks

Nico, Nico Sabbi wrote:

On Thursday 28 February 2008 00:10:20 Jesse Stroik wrote:

...

Dinesh,

I ended up using the following mencoder line:

----------- mencoder -of mpeg -oac copy -mpegopts format=dvd:vaspect=16/9:vframerate=30 -fps 60000/1001 -ofps 30000/1001 -ovc lavc -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:keyint=18:vrc_maxrate=9800:vbit rate=6000:aspect=16/9 -vf scale=720:480 00077.mts -o 00077.mpeg2 -----------

Audio/video comes out perfectly doing this.

why are telling mencoder that the vframerate is 30 instead of 3000/1001 ?

Good catch, thanks. Best, Jesse

Ken: I have the same problem. I used the following mencoder command to encode it to somethign playable. I was encoding it to MPEG-4/DivX mencoder -noskip -mc 0 -of mpeg -oac copy -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1500:aspect=16/9,vrc_buf_size=1835,mbd=2:trell -fps 60000/1001 -ofps 30000/1001 -vf scale=720:480,harddup input_file.ts -o output_file.avi _Dinesh --- Ken <kensystem at gmail.com> wrote:

...

Herv?,

...

[...] try with "-vsync 2"

Yes, this seems much better. The video seems approximately the

Jesse Stroik wrote: proper

...

speed, but I'm still seeing a little a/v sync issue.

Jesse, did you mean to imply that you ARE getting normal speed video (i.e synced audio video) using the -sync arg? I'm using build based on ffmpeg-checkout-2008-02-29 but it seem to have no effect (AVCHD's play slow video from and HDR-SR1). If it IS working for you please post your command-line args so IU can see if I'm mis-ordering them, etc.

Thanks.

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You are correct. I did change it later. -D --- Nico Sabbi <Nicola.Sabbi at poste.it> wrote:

On Wednesday 05 March 2008 16:09:08 Dinesh Nadarajah wrote:

...

Ken:

I have the same problem. I used the following mencoder command to encode it to somethign playable. I was encoding it to MPEG-4/DivX

mencoder -noskip -mc 0 -of mpeg -oac copy -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1500:aspect=16/9,vrc_buf_size=1835,mbd=2:trel l -fps 60000/1001 -ofps 30000/1001 -vf scale=720:480,harddup input_file.ts -o output_file.avi

what a mess! -of mpeg implies mpeg1 container, that can't contain mpeg4, and -o output_file.avi will create an mpeg with an .avi extension

At least remove -of mpeg _______________________________________________ ffmpeg-user mailing list ffmpeg-user at mplayerhq.hu https://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-user

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Try converting video to raw and later encoding back with audo ffmpeg -i test.mpg -f yuv4mpegpipe - | yuvfps -s 2997:100 -r 2997:100 | ffmpeg -f yuv4mpegpipe -i - -b 28800k -i audio.mp3 -y /tmp/output.avi For more info : (http://stream0.org/2008/02/howto-alter-video-speed-with-f.html) Rosh Cherian ________________________________________ From: ffmpeg-user-bounces at mplayerhq.hu [ffmpeg-user-bounces at mplayerhq.hu] On Behalf Of Ken [kensystem at gmail.com] Sent: 05 March 2008 05:51 To: FFmpeg user questions and RTFMs Subject: Re: [Ffmpeg-user] 60i AVCHD -> NTCS DVD encoding results in slow video Herv? wrote:

Le 26 f?vr. 08 ? 18:20, Jesse Stroik a ?crit :

...

FFMPEG Users,

I have a Canon HG10 that creates anamorphic AVCHD files in 1440x1080 and would like to encode to the NTSC DVD standard.

[snip]

...

The video plays slowly (just over half speed) and the audio plays at normal speed.

Here is a small AVCHD/m2ts and mp4 output in case anyone wants to test this: http://www.onnet.cc/sample.m2ts created by a sony hdr-sr1, and produces (like ffdshow) a video stream that runs at half rate (any -vsync and -r combo I tried would not work): ffmpeg -y -deinterlace -i sample.m2ts -vsync 2 -r 60 -s 480x272 -vcodec libx264 sample.mp4 http://www.onnet.cc/sample.mp4 _______________________________________________ ffmpeg-user mailing list ffmpeg-user at mplayerhq.hu https://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-user

Herv? wrote:

I didn't write it in the previous mail but vsync must be before input ;-) just a notice: you deinterlace (remove one of the 2 fields), but double the output framerate (=duplication), why?!? command line:

ffmpeg -vsync 2 -deinterlace -i sample.m2ts -r 30000:1001 -s 480x272 - vcodec libx264 -y sample.mp4

Herv?, using this command I get the same result... no change. In fact the video frame rate is reported as 15fps. Did you try this on the source http://www.onnet.cc/sample.m2ts and it worked? I'm using a ffmpeg-checkout-2008-02-29 build, by the way..