Re: [Libav-user] -itoffset issue
Ok this works to concatenate the files, but doesnt seem to allow me anyway to set an arbitrary offset. What I'm looking to do is create an .avi file that has some arbitrary mp3's playing at specific times. I'm creating the avi from an image sequence, but I'm not sure how to get the audio to show up at specific offsets. Is there a way to use -itsoffset in conjunction with concat: ? On Tue, Apr 10, 2012 at 5:16 PM, Carl Eugen Hoyos wrote: > Craig Murray writes: > > > given two one-second sounds I'm trying to concatenate them > > using several approaches. > > You have to use the concat-protocol to concatenate files, > it does not work without. > > Carl Eugen > > ___ > Libav-user mailing list > Libav-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/libav-user > ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] -itoffset issue
Craig Murray writes: > given two one-second sounds I'm trying to concatenate them > using several approaches. You have to use the concat-protocol to concatenate files, it does not work without. Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] jpg quality using image2
Craig Murray writes: > From the command line are there are flags to set the jpeg quality -qscale (Note that this is in no way image2-related, you can use the mjpeg-encoder in other containers, and there are many codecs usable in image2 that do not support qscale.) Carl Eugen ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
[Libav-user] jpg quality using image2
>From the command line are there are flags to set the jpeg quality when doing an -image2 conversion? I couldn't find anything in the documentation. ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Linking ffmpeg libraries on Windows
2012/4/5 Alex Cohn : > > Do you use any av_* functions that the linker does not complain about? > > I think you have the linking syntax wrong. -L normally points to a > directory, not a file. Also, zeranoe provides the import libraries in > /lib directory. Thus, you probably need something like: > > -L C:/QtSDK/Desktop/ffmpeg/lib -lavformat-53.dll -lavutil-51.dll Now it works! In my case: -L C:/QtSDK/Desktop/ffmpeg/lib -lavformat -lavutil Thanks Alex! -- Gustav Gonzalez xting...@gmail.com ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] -itoffset issue
I should add that if I -map 0:0 -map 1:0 it seems to merge them, but still no -itsoffset on the 2nd one. ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
[Libav-user] -itoffset issue
Sorry for all the newbie questions, I'm doing my best and spending lots of time working at it before I mail the list. :) given two one-second sounds I'm trying to concatenate them using several approaches. None of them seem to be working: Using -itsoffset >*ffmpeg -i beep-1.mp3 -itsoffset 00:00:02 -i beep-2.mp3 output.mp3* ffmpeg version N-38292-ga4c22e3 Copyright (c) 2000-2012 the FFmpeg developers built on Feb 27 2012 14:50:39 with gcc 4.6.2 configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger - -enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib libavutil 51. 41.100 / 51. 41.100 libavcodec 54. 4.100 / 54. 4.100 libavformat54. 1.100 / 54. 1.100 libavdevice53. 4.100 / 53. 4.100 libavfilter 2. 62.101 / 2. 62.101 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 7.100 / 0. 7.100 libpostproc52. 0.100 / 52. 0.100 [mp3 @ 01CE9AA0] Estimating duration from bitrate, this may be inaccurate Input #0, mp3, from 'beep-1.mp3': Metadata: artist : SoundJay.com Sound Effects Duration: 00:00:00.39, start: 0.00, bitrate: 128 kb/s Stream #0:0: Audio: mp3, 44100 Hz, mono, s16, 128 kb/s [mp3 @ 01DB5D20] Estimating duration from bitrate, this may be inaccurate Input #1, mp3, from 'beep-2.mp3': Metadata: artist : SoundJay.com Sound Effects Duration: 00:00:00.55, start: 0.00, bitrate: 128 kb/s Stream #1:0: Audio: mp3, 44100 Hz, mono, s16, 128 kb/s Output #0, mp3, to 'output.mp3': Metadata: TPE1: SoundJay.com Sound Effects TSSE: Lavf54.1.100 Stream #0:0: Audio: mp3, 44100 Hz, mono, s16 Stream mapping: Stream #0:0 -> #0:0 (mp3 -> libmp3lame) Press [q] to stop, [?] for help size= 3kB time=00:00:00.41 bitrate= 68.4kbits/s video:0kB audio:3kB global headers:0kB muxing overhead 6.820221% Result is only the first mp3 in the output. Do I need to be using -map? I suspect I'm just being stupid and missing something obvious. Craig ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] Compiling ffmpeg libraries on Windows 64-bit with x264 decoding support
2012/4/10 William Kreamer : > Hello, > > I'm trying to compile ffmpeg developer libraries with support for decoding > with the x264 decoder. I found the instructions below. Before I try them > out, has anyone successfully used the instructions below? Is there any other > tutorial you could point me toward? To _decode_ h264, you don't need x264 library support. -- Andrey Utkin ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] H.264 nal decode
Thanks all for reply. However I have got the H.264 compression using libX264 from * http://stackoverflow.com/questions/2940671/how-to-encode-series-of-images-into-h264-using-x264-api-c-c * and it is working fine for making video. @NITIN GOYAL I have found in each nal frame contain the starting code 0 0 0 1. But still it is not working. @Alex Cohn I have omitted first 4 bytes and reduce the size. But still avcodec_decode_video2() cann't decode the encoded array. @Kalileo Sorry I have not try H.264 compression with ffmpeg library and if possible please give me some suggestion how can I do with ffmpeg library. I have use avcodec_decode_video2( m_pContext, picture, &gotpicture, pkt); where AVCodecContext* m_pContext; AVPacket *pkt = new AVPacket(); av_init_packet(pkt); .. pkt->data = (heders[0].p_payload+4); pkt->size = i_frame_size - 4; int gotpicture; AVFrame* picture = avcodec_alloc_frame(); I have fill up the parameters with these values and pass it to avcodec_decode_video2() Thanks and regards Srikanta Mondal On Tue, Apr 10, 2012 at 12:37 PM, Kalileo wrote: > > On Apr 10, 2012, at 13:19 , srikanta mondal wrote: > > > Thank you for reply. > > @kalileo I have simply got the UDP socket and get the byte array from > it. > > you could also use the ffmpeg libraries to do that. > > > Now that byte array is basically the x264_nal_t*(p_payload[0]) from > sender side. > > Is it? or is it in a container, such as mpegts? Then you should demux > first. > > > That encoded byte array come to client side. Now I want to decode that > array with its corresponding parameter values. I think it can be done by > using avcodec_decode_video2(). > > How are you passing that byte array to avcodec_decode_video2()? > > > > ___ > Libav-user mailing list > Libav-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/libav-user > ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
[Libav-user] ffmpeg support for GTP and IPSEc????
Do ffmpeg supports stream with IPsec and GPRS tunneling (GTP)? I have not found any reference of any of them? I have a RTP stream which is GTP and protected by IPSec so, will i able to decode or depacketize the content using ffmpeg? Any idea on this. If someone have idea about any other tool for the same, do let me know. Thanks Nitin ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
[Libav-user] How to get current pts after 'av_seek_frame' without calling 'av_read_frame'?
Hi All! How to get current pts after 'av_seek_frame' without calling 'av_read_frame'? -- With best regards, Pavel A. Sokolov mobile: +7(921)419-1819 skype: pavel_a_sokolov ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] avcodec_open seg fault?
2012/4/10 Jeremy Graham : > Actually, I will go ahead and try to post what I think is the relevant > code. This comes almost directly from the api_example found at this URL: > http://cekirdek.pardus.org.tr/~ismail/ffmpeg-docs/api-example_8c-source.html That seem to be quite old revision of api usage example. First of all ensure you have installed recent ffmpeg (from git, or last release (0.10.2 afaik)), and start with these examples: http://git.videolan.org/?p=ffmpeg.git;a=tree;f=doc/examples;hb=HEAD If these examples are hard for you to work on, you may ask here in another post, describing the exact scenario you need, and we'll show you ways to do that, and maybe other api usage examples closer to what you need. -- Andrey Utkin ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] H.264 nal decode
On Apr 10, 2012, at 13:19 , srikanta mondal wrote: > Thank you for reply. > @kalileo I have simply got the UDP socket and get the byte array from it. you could also use the ffmpeg libraries to do that. > Now that byte array is basically the x264_nal_t*(p_payload[0]) from sender > side. Is it? or is it in a container, such as mpegts? Then you should demux first. > That encoded byte array come to client side. Now I want to decode that array > with its corresponding parameter values. I think it can be done by using > avcodec_decode_video2(). How are you passing that byte array to avcodec_decode_video2()? ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
Re: [Libav-user] H.264 nal decode
On Tue, Apr 10, 2012 at 09:19, srikanta mondal wrote:
[...]
>x264_param_t param;
[...]
>x264_param_default(¶m);
[...]
>//For streaming:
>param.b_repeat_headers =1;
>param.b_annexb = 1;//1
[...]
> i_frame_size = x264_encoder_encode( encoder, &headers, &i_nal,
> &pic_in, &pic_out );
> decoding(heders[0].p_payload, i_frame_size);
[...]
> void decoding(uint8_t *data, int size)
> {
> AVPacket *pkt;
> pkt = new AVPacket();
> int gotpicture;
>
> av_init_packet(pkt);
> avcodec_get_frame_defaults(picture);
>
> pkt->data = data;
> pkt->size = size;
> int outSize = avcodec_decode_video2(m_pContext, picture, &gotpicture,
> pkt);
> }
>
> I get the error of segmentation fault by gdb debugger.
>
> Thanks and regards
> Srikanta Mondal
You asked for annexb format of payload. To avcodec_decode_video2() you
must pass the stripped data. Try to simply replace the call
decoding(heders[0].p_payload, i_frame_size)
with
decoding(heders[0].p_payload+4, i_frame_size-4);
BR,
Alex
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Re: [Libav-user] H.264 nal decode
Hey do all ur raw payload u r sending to the decoding function are in NAL format like 0001xRawpayload format?? I have done the same thing with the RTP packets. Removed RTP headers inserted NAL start prefix headers i.e. 0001 before each NAL and then entered the data to decoding functions. And if the output is greater than zero, you will get the decoded output in YUV format in the output buffer. On Tue, Apr 10, 2012 at 11:49 AM, srikanta mondal wrote: > Thank you for reply. > @kalileo I have simply got the UDP socket and get the byte array from > it. Now that byte array is basically the x264_nal_t*(p_payload[0]) from > sender side. That encoded byte array come to client side. Now I want to > decode that array with its corresponding parameter values. I think it can > be done by using avcodec_decode_video2(). But unfortunately the encoded > array may be not appropriate for the decoding. There may some addition of > bytes with the array. Please help. > > @Alex I get the error of segmentation fault by gdb debugger. > > > Thanks and regards > Srikanta Mondal > > > > On Tue, Apr 10, 2012 at 11:09 AM, Alex Cohn wrote: > >> On Mon, Apr 9, 2012 at 15:02, srikanta mondal >> wrote: >> > Thank you for your reply. >> > >> > @Alex I have used also the following >> > sizeDelay = x264_encoder_delayed_frames(encoder); >> > But all are in vein. >> > >> > Thanks all of You >> > Srikanta Mondal >> >> It's not clear what kind of failure you see. >> >> Alex >> ___ >> Libav-user mailing list >> Libav-user@ffmpeg.org >> http://ffmpeg.org/mailman/listinfo/libav-user >> > > > ___ > Libav-user mailing list > Libav-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/libav-user > > ___ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
