<div dir="ltr"><br><div class="gmail_extra">Level is like any other parameter for the libx264, you can set it by using the </div><div class="gmail_extra">int x264_param_parse( x264_param_t *, const char *name, const char *value )</div>
<div class="gmail_extra"><br></div><div class="gmail_extra" style>name = "level"</div><div class="gmail_extra" style>value = "4.0" or whatever</div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Fri, May 24, 2013 at 3:00 AM, <span dir="ltr"><<a href="mailto:x264-devel-request@videolan.org" target="_blank">x264-devel-request@videolan.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
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Today's Topics:<br>
<br>
1. How to set level programmatically (YIRAN LI)<br>
2. Re: How to set level programmatically (Sergio Garcia Murillo)<br>
3. Re: Different pic_init_qp_minus26 cause stitching to fail.<br>
(Anders Rein)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Fri, 24 May 2013 10:49:48 +1000<br>
From: YIRAN LI <<a href="mailto:mrfun.china@gmail.com">mrfun.china@gmail.com</a>><br>
To: <a href="mailto:x264-devel@videolan.org">x264-devel@videolan.org</a><br>
Subject: [x264-devel] How to set level programmatically<br>
Message-ID:<br>
<<a href="mailto:CAN16yyMd_DVEHVem4aRnJYuKK4g%2B2qjUhffteBQdjU-oHTLmfg@mail.gmail.com">CAN16yyMd_DVEHVem4aRnJYuKK4g+2qjUhffteBQdjU-oHTLmfg@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="iso-8859-1"<br>
<br>
Hi Guys,<br>
<br>
I'm writing a application to convert videos into iPhone/iPad supported<br>
format. So I know the profile and highest level I can convert to.<br>
<br>
I know there's an API x264_param_apply_profile to set profile, but I<br>
couldn't find where can I set level in x264_param_t.<br>
<br>
Another question is, if I couldn't set level programmatically, could I<br>
achieve the same result by supplying max resolution, max frame size, and<br>
other params?<br>
<br>
Great thanks!<br>
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Message: 2<br>
Date: Fri, 24 May 2013 10:47:58 +0200<br>
From: Sergio Garcia Murillo <<a href="mailto:sergio.garcia.murillo@gmail.com">sergio.garcia.murillo@gmail.com</a>><br>
To: <a href="mailto:x264-devel@videolan.org">x264-devel@videolan.org</a><br>
Subject: Re: [x264-devel] How to set level programmatically<br>
Message-ID: <<a href="mailto:519F293E.9060907@gmail.com">519F293E.9060907@gmail.com</a>><br>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"<br>
<br>
+1<br>
<br>
Some conferencing equipment matches the level in the SPS with the<br>
profile-level-id negotiated via SDP and reject it if they don't match<br>
(even if the h264 stream comply with the level constrains). So currently<br>
I have to check all output nals for SPS ones and rewrite the value.<br>
<br>
Best regards<br>
Sergio<br>
<br>
El 24/05/2013 2:49, YIRAN LI escribi?:<br>
> Hi Guys,<br>
><br>
> I'm writing a application to convert videos into iPhone/iPad supported<br>
> format. So I know the profile and highest level I can convert to.<br>
><br>
> I know there's an API x264_param_apply_profile to set profile, but I<br>
> couldn't find where can I set level in x264_param_t.<br>
><br>
> Another question is, if I couldn't set level programmatically, could I<br>
> achieve the same result by supplying max resolution, max frame size,<br>
> and other params?<br>
><br>
> Great thanks!<br>
><br>
><br>
><br>
><br>
><br>
><br>
> _______________________________________________<br>
> x264-devel mailing list<br>
> <a href="mailto:x264-devel@videolan.org">x264-devel@videolan.org</a><br>
> <a href="http://mailman.videolan.org/listinfo/x264-devel" target="_blank">http://mailman.videolan.org/listinfo/x264-devel</a><br>
<br>
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<br>
Message: 3<br>
Date: Fri, 24 May 2013 11:15:38 +0200<br>
From: Anders Rein <<a href="mailto:are@vizrt.com">are@vizrt.com</a>><br>
To: Mailing list for x264 developers <<a href="mailto:x264-devel@videolan.org">x264-devel@videolan.org</a>><br>
Subject: Re: [x264-devel] Different pic_init_qp_minus26 cause<br>
stitching to fail.<br>
Message-ID: <<a href="mailto:519F2FBA.3010103@vizrt.com">519F2FBA.3010103@vizrt.com</a>><br>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"<br>
<br>
Hi,<br>
<br>
Thanks for your reply!<br>
<br>
Changing the SPS/PPS ID of one of the clips and then having both<br>
SPS/PPS' in the video would be the more correct solution, but<br>
unfortunately this is not widely supported by decoders/players. Since we<br>
are delivering content to various mobile device it is important that it<br>
works on as many phones as possible.<br>
<br>
I think something like --stitchable would be exactly what we are looking<br>
for.<br>
<br>
Anders<br>
On 05/22/2013 05:29 PM, Jason Garrett-Glaser wrote:<br>
> On Wed, May 22, 2013 at 2:02 AM, Anders Rein <<a href="mailto:are@vizrt.com">are@vizrt.com</a>> wrote:<br>
>> Hi,<br>
>><br>
>> I am working on a software which transcodes clips and commercial to<br>
>> different resolution and serve the correct content to various media devices.<br>
>> We've been using x264 via ffmpeg for encoding h264. Recently we updated x264<br>
>> from snapshot-20120705 to snapshot-20130303. This caused our stitching of<br>
>> commercial and video content to fail.<br>
>><br>
>> The stitching fails because the pic_init_qp_minus26 in the<br>
>> picture_parameter_set differs between the clips. The results vary from foggy<br>
>> and saturate results to complete crash (depending on the decoder).<br>
> Is the video not allowed to keep the PPS and SPSs from each of the<br>
> stitched sections?<br>
><br>
> If not, maybe I could add a --stitchable option?<br>
><br>
> Jason<br>
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End of x264-devel Digest, Vol 72, Issue 15<br>
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</blockquote></div><br></div></div>