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Axel Gunter | 1 Mar 03:02
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Re: Problem converting MPEG2TS to h264

Víctor Paesa wrote:
> Hi,
>
>   
>>>>>> This might be a newbie question. I am trying to convert an MPEG2 TS
>>>>>> into
>>>>>> h264 encoded clip and facing problems. Here is the command I am
>>>>>> using -
>>>>>> *./ffmpeg -i source.ts -vcodec h264 -y -f h264 output.h264
>>>>>>
>>>>>> *This produces a zero sized output.h264 file.
>>>>>>
>>>>>> Here is the output log,
>>>>>> *FFmpeg version SVN-r7773, Copyright (c) 2000-2006 Fabrice Bellard,
>>>>>> et
>>>>>> al.
>>>>>>   configuration:
>>>>>>   libavutil version: 49.2.0
>>>>>>   libavcodec version: 51.29.0
>>>>>>   libavformat version: 51.8.0
>>>>>>   built on Jan 31 2007 15:31:51, gcc: 3.2.3 20030502 (Red Hat Linux
>>>>>> 3.2.3-53)
>>>>>> Input #0, mpegts, from 'source.ts':
>>>>>>   Duration: 00:27:15.4, start: 35760.523600, bitrate: 4606 kb/s
>>>>>>   Stream #0.0[0x1020](eng): Audio: 0x0000, 48000 Hz, stereo, 192 kb/s
>>>>>> Output file does not contain any stream
>>>>>>
>>>>>> *What might be the problem here?
>>>>>>
>>>>>>
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Axel Gunter | 1 Mar 03:12
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H264 encoded video has jitters

Hi,

Was successful in encoding H264 (carried over mpegts) from mpeg2 encoded 
transport stream using the following command -
./ffmpeg -i source.ts -vcodec h264 -s 320x240 -refs 4 -bf 2 -y -f mpegts 
-acodec copy output.ts

However when I play the output.ts file using VLC player, it shows video 
jitter and frames being displayed out-of-order at times. Anyone has an 
idea why this might be happening?

Thanks
Axel
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Thu Mai | 1 Mar 04:47
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Register a new protocol and use it as URL .how to?

Hello everyone !
Could you please show me how to register a new protocol and use it as URL as
that was mentioned in this link
http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2006-December/049529.html
Maybe a code snippet will help me alot.
Thank you
<http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2006-December/049529.html>
--
Mai xuan Thu
thumaixuan <at> gmail.com

Research and  Development Laboratory of Multimedia Technology
Hanoi University of Technology.
Hanoi Vietnam
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Thu Mai | 1 Mar 04:57
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Decode video Elementary stream directly from buffer not from file? How to

Hi everyone!
I'm having a problem with av_open_input_file because this function only
deals with files on hard disk, not in buffer. In my project, i have to
receive data from RTP packet and decode its payload (a Video ES).
My solution up to now is writting these incoming data into a file and use
av_open_input_file to open it but i thinks it is not a good solution.
Could you please show me a solution to this problem .A code sample will help
me alot.
Thank you !

--

-- 
Mai xuan Thu
thumaixuan <at> gmail.com

Research and  Development Laboratory of Multimedia Technology
Hanoi University of Technology.
Hanoi Vietnam
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Mathias Soeken | 1 Mar 08:53
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Generating HDV1 compatible files

Hi,

I want to create HDV1 (MP <at> H-14) [1] compatible files (1280x720, 50 frames 
progressive). I have generated such a file with TMPGEnc yesterday, a 
screenshot of the settings is at [2]. But in this case, they choose HDV2 with 
other dimensions and other framerate.

Sorry for annoying, I have asked similar questions in #ffmpeg on freenode, but 
my connection was sometimes very weak, so I disconnected very often, so I try 
it with the mailing list.

Best regards,
Mathias

[1] http://en.wikipedia.org/wiki/MPEG-2#Profiles_and_Levels
[2] http://tmpgenc.pegasys-inc.com/de/product/thumbnail/te4xp_05a.html
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Daren Chandisingh | 1 Mar 10:13

RE: Sound (and video) problems transcoding from .3gp to.flv

On 27 February 2007 17:30, I wrote:

> To: ffmpeg-user <at> mplayerhq.hu
> Subject: [Ffmpeg-user] Sound (and video) problems transcoding 
> from .3gp to.flv
> 
> Hi, 
> 
> I'm trying to transcode .3gp video files to .flv.  Whenever I 
> do this, the resultant file appears to play slightly slowly, 
> and the sound is drawn own.  I've tried extracting an .mp3 
> stream on its own, and that played through with the correct pitch.  
> 
> Are there any particular issues transcoding .3gp to .flv, or 
> is there anything one can suggest?  
> 
> Here are some examples of my output:
> 
> [root <at> genesis user1]# ffmpeg -i
> baea2bd62aeda73c9c61bb91c98f3240247faed9.3gp -an 
> video-only.flv FFmpeg version SVN-r8090, Copyright (c) 
> 2000-2007 Fabrice Bellard, et al.
>   configuration: --enable-amr_nb --enable-amr_wb 
> --enable-shared --enable-libmp3lame
>   libavutil version: 49.3.0
>   libavcodec version: 51.34.0
>   libavformat version: 51.10.0
>   built on Feb 23 2007 12:01:57, gcc: 4.1.1 20061011 (Red Hat 
> 4.1.1-30) Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
> 'baea2bd62aeda73c9c61bb91c98f3240247faed9.3gp':
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Michel Bardiaux | 1 Mar 11:35
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Re: Decode video Elementary stream directly from buffer not from file? How to

Thu Mai wrote:
> Hi everyone!
> I'm having a problem with av_open_input_file because this function only
> deals with files on hard disk, not in buffer. In my project, i have to
> receive data from RTP packet and decode its payload (a Video ES).
> My solution up to now is writting these incoming data into a file and use
> av_open_input_file to open it but i thinks it is not a good solution.
> Could you please show me a solution to this problem .A code sample will 
> help
> me alot.
> Thank you !
> 

Why do you post this again since you *have* seen my reply about 
register_protocol?

--

-- 
Michel Bardiaux
R&D Director
T +32 [0] 2 790 29 41
F +32 [0] 2 790 29 02
E mailto:mbardiaux <at> mediaxim.be

Mediaxim NV/SA
Vorstlaan 191 Boulevard du Souverain
Brussel 1160 Bruxelles
http://www.mediaxim.com/
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Michel Bardiaux | 1 Mar 11:58
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Re: Register a new protocol and use it as URL .how to?

Thu Mai wrote:
> Hello everyone !
> Could you please show me how to register a new protocol and use it as 
> URL as
> that was mentioned in this link
> http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2006-December/049529.html
> Maybe a code snippet will help me alot.

Have you even tried looking in the sources?

Here is some pseudocode:

typedef struct {
	char*	buf;
	int	buflen, bufused;
} BUF;

static int hpany_close(URLContext* h)
{
	BUF*	pf = (BUF*)&h->priv_data;
	// I dont free(pf->buf);, I assume the data belongs to the app
	free(pf);
	return 0;
}

static int hpany_open(URLContext *h, const char *pseudofilename, int flags)
{
	// URL syntax: hpany:0x12345678
	int 		r = -ENOENT;
	BUF*		af;
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Moore, Dave M (UK Rochester | 1 Mar 12:06

RE: Decode video Elementary stream directly from buffernot from file? How to


>> Hi everyone!
>> I'm having a problem with av_open_input_file because this function 
>> only deals with files on hard disk, not in buffer. In my project, i 
>> have to receive data from RTP packet and decode its payload (a Video
ES).
>> My solution up to now is writting these incoming data into a file and

>> use av_open_input_file to open it but i thinks it is not a good
solution.
>> Could you please show me a solution to this problem .A code sample 
>> will help me alot.
>> Thank you !
>> 

>Why do you post this again since you *have* seen my reply about
register_protocol?

Probably because the poster would like a source code example or a
sensible level of documentation!. I've been trying to achieve something
similar for a number of weeks now without success.

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Axel Gunter | 1 Mar 19:57
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Problem with h264 B-frames?

Hi Experts,

Do we know of any known problem using h264 video codec and having 
B-frames? I am using mpegts as the transport.

when using the command below the output video looks jerky with frames 
being rendered out of order (some problem with timestamps using B-frames?)
./ffmpeg -i source.ts -vcodec h264 -s 320x240 -refs 4 -bf 2 -y -f mpegts 
-acodec copy output.ts

However, when I disable B-frames using the command below, the video is 
better (VLC says dropping late frames, but that might be a decoder 
problem). At least the time stamps seem to be ok.
./ffmpeg -i source.ts -vcodec h264 -s 320x240 -refs 4 -bf 0 -y -f mpegts 
-acodec copy output.ts

Has anyone seen this behavior before? Any help is appreciated.

-Axel
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