Re: [Libav-user] h264 with SVC

On Mon, Mar 12, 2018 at 2:16 PM, Vittalprasad wrote: > Hi All, > > Does Latest FFMPEG supports h264 SVC extension? > > No, SVC is not supported. - Hendrik ___ Libav-user mailing list Libav-user@ffmpeg.org

Re: [Libav-user] Container duration

On Fri, Feb 16, 2018 at 4:56 PM, Yuriy Pryyma wrote: > I have some question regarding duration > > 1)Why we are adding "magic" 5000 to AVFormatContext duration in > av_dump_format function? > > See here > >

Re: [Libav-user] Build FFmpeg libraries in Windows

On Thu, Nov 30, 2017 at 2:20 PM, m.kamalasubha m.kamalasubha wrote: > Hello, > I am trying to build static libraries (.lib) for FFmpeg 3.3 version in > Windows 10. > I followed the steps outlined in the link given below, >

Re: [Libav-user] libavformat/protocol_list.c ?

On Wed, Nov 1, 2017 at 9:33 AM, Mahboud Zabetian wrote: > Ah, thank you. I was hoping this would show me how I could register my own > protocols. Our software used to ffurl_register_protocol 5 protocols. Now > that we are upgrading to a later version of ffmpeg, I have to

Re: [Libav-user] What to replace ffurl_register_protocol with?

On Tue, Oct 3, 2017 at 10:39 PM, Mahboud Zabetian wrote: > Hi. I have old code that calls ffurl_register_protocol(), and linked with > FFMPEG 3.0.2. > > I'm upgrading to FFMPEG 3.3. It looks like ffurl_register_protocol()n has > been deprecated, although there is not a

Re: [Libav-user] Decoding h264 (NV12) stream from NVENC

On Mon, Jul 31, 2017 at 10:00 AM, Michael IV wrote: > Hi! I am using NVENC encoder to create h264 stream.The YUV format is NV12. > Now, I need also to decode that stream back to YUV.I wrote a module for > that,based on > this example: > >

Re: [Libav-user] AVCHD m2ts magic number?

On Fri, May 26, 2017 at 11:14 PM, cyril apan wrote: > > There isn't any real magic number for m2ts files. Those files are raw MP4 > Part 12 streams without headers. As such streams usually start with a sync > byte (value of a sync byte is always 0x47), you can

Re: [Libav-user] calling av_register_all() twice makes libav stuck.

On Mon, May 22, 2017 at 11:04 AM, Gabriele Greco wrote: >> >> AVOnce control = AV_ONCE_INIT; >> >> ff_thread_once(, register_all); >> } >> >> Should it be a static or a global variable here? >> > > Considering that AVOnce is defined as 'char' it seems a bug to

Re: [Libav-user] h264 sps frame_cropping_flag = 1, dxva decode How to get left offset or top offset?

On Sat, May 20, 2017 at 9:36 AM, 朱伟滔 <15018405...@163.com> wrote: > in H264 sps，I set a different sps > bool frame_cropping_flag = 1; > int frame_crop_left_offset = 100; > int frame_crop_right_offset = 100; > int frame_crop_top_offset = 100; > int

Re: [Libav-user] ff_codec_wav_tags has duplicate tags

On Mon, Apr 17, 2017 at 4:37 AM, 坎 wrote: > Hi, > > When I tried to play a ogg file with audio formats as pcm_u8，it > turned out to be pcm_s16le. By tracking the avformat_open_input, I got this: > > st->codecpar->codec_id = ff_codec_get_id(ff_codec_wav_tags,...) > >

Re: [Libav-user] possible AVFilterGraph bug: code, work around, and video triggering issue

On Wed, Jan 25, 2017 at 12:44 PM, Blake Senftner wrote: > I apologize, I have a number of these problem videos and because the video I > linked has the same “2 extra pixels per image row” issue, I thought it was > also YUV. Sorry I wasted your time, Carl. > >

Re: [Libav-user] nvidia hw ffmpeg, stuck at compiling

On Thu, Jan 12, 2017 at 8:19 PM, Morten Fugl wrote: > When changing ffmpeg to support nvidia hw decoding, I followed this guide: > > https://developer.nvidia.com/ffmpeg > > The guide says "Copy the NVIDIA video header files to the respective include > folders", but which

Re: [Libav-user] Fwd: Endianness of numerical values in h264 stream

On Thu, Dec 29, 2016 at 12:32 PM, Слободенюк Александр Игоревич wrote: > Greetings. Found strange thing in this code: > > static inline int decode_vui_parameters(H264Context *h, SPS *sps) > { > int aspect_ratio_info_present_flag; > unsigned int aspect_ratio_idc; > >

Re: [Libav-user] AVStream->time_base not functional

On Mon, Nov 21, 2016 at 11:35 AM, Sampsa Riikonen wrote: > Hi, > > At the current development branch, setting > > AVStream->time_base > > does not have any effect on the final stream time base anymore..! > (in earlier versions there where the codec time base and the stream

Re: [Libav-user] Linking error with FFmpeg 3.1.1

On Mon, Jul 11, 2016 at 11:31 AM, Fermín Ayuso Márquez wrote: > Hello! > > I've just compiled new version of FFmpeg (3.1.1). I'm using the resulting > libraries to decode video from ip cameras. Compilation of FFmpeg was OK, but > when I try to use them in my own

Re: [Libav-user] Need help with transcoding to AAC example

On Thu, Mar 31, 2016 at 11:55 AM, Przemysław Sobala wrote: > Hello >I've altered doc/examples/transcoding.c to encode using aac codec: > The transcoding example isn't all the powerful, its specifically designed to transcode to the same format for demo purposes,

Re: [Libav-user] how to build ffmpeg with -O0 instead of -O1

On Mon, Mar 21, 2016 at 9:19 AM, qw wrote: > Hi, > > I want to build ffmpeg without optimization options, which means compiling > flags uses O0 instead of O1-O3. I use the following command to build ffmpeg, > where O1 is used in config.mak. > > ./configure --enable-debug

Re: [Libav-user] avcodec_decode_video2 crash with HEVC and get_buffer2

On Fri, Mar 11, 2016 at 2:11 PM, Никита Скиба wrote: > Program received signal SIGSEGV, Segmentation fault. > [Switching to Thread 4764.0x268c] > 0x07fecdd455bf in ff_hevc_transform_add32_8_avx2 () >from C:\Program Files\AxxonSoft\AxxonSmart\bin\avcodec-itv-3.0.1-57.dll

Re: [Libav-user] Invalid data found when processing input - UPDATE

On Fri, Feb 19, 2016 at 5:37 PM, wrote: > HI > it seems that the cause is in h264 format. It's not annex b but avc1. > The question is: how can I supply to avcodec_decode_video2 this format ? > Either setting the flag is_avc to one: > >

Re: [Libav-user] Building with purchased libraries

On Wed, Dec 9, 2015 at 2:35 PM, Phil Turmel wrote: > On 12/09/2015 02:47 AM, Yury Udovichenko wrote: >> Hello, >> >> Our company is in process of purchasing binary version of x264 library >> from the legal representative of the library owner. This means we are >> not required

Re: [Libav-user] avcodec_decode_video2 latency.

On Thu, Nov 19, 2015 at 12:22 PM, Jean-Yves Avenard wrote: > Hi > > Started to use FFmpeg/ffvp9 to decode VP9 streams in place of libvpx ; > the gain in performance is very welcome. > > However, the major issue is the latency added by libavcodec ; when > feeding

Re: [Libav-user] dts/pts generated by aac encoder less than zero

On Fri, Oct 9, 2015 at 7:53 AM, qw wrote: > Hi, > > I use avcodec_encode_audio2() to call aac encoder to compress audio. > AVFrame::pts is set to 0 for 1st frame, 1 for 2nd frame, 2 for 3rd frame, > and so on. But I find pts and dts are negtive values in 1st two output >

Re: [Libav-user] one issue about audio resampler

On Fri, Sep 18, 2015 at 5:33 AM, qw wrote: > Hi, > > I'm using below functions to implement audio resampling, but encounter one > issue. > > swr_alloc_set_opts(), swr_init(), swr_convert_frame(), swr_get_delay(). > > Input frame is set to 8000hz mono AV_SAMPLE_FMT_FLT, while

Re: [Libav-user] h264,h265: maximum referenced frames vs. GOP size

On Fri, Sep 11, 2015 at 1:15 PM, Heiner Mueller wrote: > i found this in the DXVA code, and i would like to optimize it a bit: >>> >>> >>> Then please send your tested patch (made with git >>> format-patch) to the development mailing list >>> where it can be

Re: [Libav-user] Buffered frames in avcodec h264 decoder

On Thu, Dec 4, 2014 at 2:31 PM, Alina lifshits al...@vicon.co.il wrote: Hello, I am using avcodec decoder to decode h264 stream. I noticed that the decoder buffers a few first frames before returning a decoded picture. The stream is from a live source and does not contains B frames. Is

Re: [Libav-user] using avpicture_deinterlace

On Mon, Sep 22, 2014 at 9:00 AM, YIRAN LI mrfun.ch...@gmail.com wrote: Hi there, I have some questions for the deprecated avpicture_deinterlace function in ffmpeg. Our program is using avpicture_deinterlace to deinterlace frames. For every video packet, avcodec_decode_video2 is called to

Re: [Libav-user] HW Accelerator in Windows: DXVA2 with new API

On Thu, Aug 28, 2014 at 1:20 PM, Hector Alonso hector.alonso.apari...@gmail.com wrote: Is there a limitation into the number of slices the DXVA2 decoder can manage? Is there any way to reconfigure it? I've changed the MAX_SLICES definition and rebuilt ffmpeg (as suggested for the mpeg2

Re: [Libav-user] undefined reference to sws_getcontext

On Tue, Aug 12, 2014 at 2:42 PM, Suprith Gowda suprith1...@gmail.com wrote: Hi , i am building an application using ffmpeg.. but end up in error 1. /usr/local/gcc/x86_linux-gnu/4.7/../../lib/libmpeg.so: undefined reference to sws_getcontext. 2.

Re: [Libav-user] Understanding a line in muxing.c

On Fri, May 16, 2014 at 6:39 PM, Gonzalo Garramuno ggarr...@gmail.com wrote: I have trouble understanding what the following line in muxing.c does: /* compute destination number of samples */ dst_nb_samples = av_rescale_rnd(swr_get_delay(swr_ctx, c-sample_rate) + src_nb_samples,

Re: [Libav-user] Does the image2 demuxer work with a custom AVIOContext?

On Sun, Jan 12, 2014 at 4:49 PM, Robert Krüger krue...@lesspain.de wrote: Hi, I am having problems programmatically extracting metadata like size and pixel format from a dpx image using a custom AVIOContext. Should that work or does the image2 demuxer only work with files even in the

Re: [Libav-user] Does the image2 demuxer work with a custom AVIOContext?

On Sun, Jan 12, 2014 at 8:02 PM, Carl Eugen Hoyos ceho...@ag.or.at wrote: Hendrik Leppkes h.leppkes@... writes: image2 requires to directly access the files itself. Thank you for correcting me! There is also a image2pipe, which can read the data from a avio context, but in my experience

Re: [Libav-user] any way to interrupt avcodec_decode_video2 ?

On Mon, Dec 16, 2013 at 8:08 AM, Don Moir donm...@comcast.net wrote: Would like to interrupt avcodec_decode_video2 at times like when starting a new seek. Decoding takes the most time of anything I do. Since app is timeline oriented, trying to keep seek time down to minimum and if

Re: [Libav-user] packet flag AV_PKT_FLAG_KEY

On Wed, Dec 4, 2013 at 1:41 PM, Don Moir donm...@comcast.net wrote: - Original Message - From: Carl Eugen Hoyos ceho...@ag.or.at To: libav-user@ffmpeg.org Sent: Tuesday, December 10, 2013 6:12 PM Subject: Re: [Libav-user] packet flag AV_PKT_FLAG_KEY Don Moir donmoir@... writes:

Re: [Libav-user] How to keep AVFrame data after codec close

On Thu, Dec 5, 2013 at 1:33 PM, Eric Beuque eric.beu...@gmail.com wrote: Thank you for your answer, i saw that av_frame_ref/av_frame_unref is avaliable in FFMpeg 2.0, but i'm using 1.1.2, and I don't find any way to use reference couting in this version. Is this feature available in 1.1.x

Re: [Libav-user] what library is linked to if w32thread is enabled

On Wed, Sep 4, 2013 at 2:25 AM, YIRAN LI mrfun.ch...@gmail.com wrote: Hi I'm building ffmpeg in MingW, and tried to build two version: one uses w32thread and another uses pthread. I built with --enable-shared, and seems the dlls generated are almost of the same size. I know MingW comes

Re: [Libav-user] Audio conversion from planar to non-planar formats

On Wed, Jun 26, 2013 at 8:01 AM, Taha Ansari mtaha.ans...@gmail.com wrote: Hi! I am working on audio conversion. Looking at different example online, I have been successfully able to convert FLTP format to S16. To my understanding, FLTP is planar, with values in floating range: -1.0 to +1.0.

Re: [Libav-user] FLV logic question

On Thu, Jun 20, 2013 at 3:55 PM, Mark Stevans mark39...@cesinst.com wrote: Frankly, I'm baffled by lines 445-457 of the trunk version of libavformat/flvdec.c. Can anyone explain their purpose? Thanks! These metadata properties are already stored in the codec/stream config structures, so it

Re: [Libav-user] Faulty handling of file: protocol on Windows

On Tue, Jun 18, 2013 at 1:22 PM, Hendrik Schreiber h...@tagtraum.com wrote: On Jun 18, 2013, at 11:47 AM, Hendrik Schreiber wrote: On Jun 18, 2013, at 11:16 AM, Carl Eugen Hoyos wrote: Hendrik Schreiber hs@... writes: On Windows, the scheme part (file:) is always followed by a bunch of

Re: [Libav-user] Audio 5.1 downsample to stereo broken in swresample?

On Mon, Jun 17, 2013 at 4:28 PM, Gonzalo Garramuno ggarr...@gmail.com wrote: On 17/06/13 04:47, Nicolas George wrote: Can you reproduce the problem using the ffmpeg command-line tools? I just tried and the conversion works as expected. I find ffmpeg does not rely on swresample for the

Re: [Libav-user] What happened to libavcodec/api_example.c

On Sat, Jun 15, 2013 at 11:54 AM, arif aft...@gmail.com wrote: Hi, The file i'm talking about is listed here http://cekirdek.pardus.org.tr/~ismail/ffmpeg-docs/api-example_8c-source.html But current git repo does not have it. And a git log -- libavcodec/api-example.c does not come up with

Re: [Libav-user] Video encoding at fractional fps

On Tue, Jun 11, 2013 at 3:25 PM, cyril apan cyrila...@yahoo.fr wrote: Never tested it, but you should try with those values: c-time_base.den = 2997; c-time_base.num = 100; Regards, Cyril APAN. This should work. Note however that the 100% correct value for 29.97 is 3/1001,

Re: [Libav-user] Demuxing data directly into user provided buffers

On Wed, Jun 5, 2013 at 6:28 PM, Arvind Raman arvind_ra...@yahoo.com wrote: Question: Is it possible to configure libavformat to demux data directly into user provided buffers (allocated in the application) rather than into the packet buffers that get allocated within calls to the libavformat

Re: [Libav-user] Making a static lib with -MD option

On Wed, May 22, 2013 at 9:42 AM, Steffen steffen.roe...@hella.com wrote: The git head works but gives me something like: 1 Creating library ..\..\bin\Debug\cio.lib and object ..\..\bin\Debug\cio.exp 1libavcodec.lib(pamenc.o) : warning LNK4049: locally defined symbol _avpriv_snprintf

Re: [Libav-user] Hevc

On Wed, May 22, 2013 at 9:38 AM, Christophe Nelson cnel...@ina.fr wrote: Hello everybody I am wondering if some of the developers of ffmpeg have any intention to implement HEVC in ffmpeg ? I know there is an open lib called openHevc https://github.com/OpenHEVC. For the record, OpenHEVC is

Re: [Libav-user] how to set crf for vp8 encoder in ffmpeg programmatically?

On Mon, May 20, 2013 at 10:23 AM, YIRAN LI mrfun.ch...@gmail.com wrote: Hi guys, I've downloaded latest libvpx code and built it into ffmpeg, so that my application can use ffmpeg dlls. Vp8 encoding works correctly and my application can generate webm videos. But what I want to know is,

Re: [Libav-user] Making a static lib with -MD option

On Mon, May 13, 2013 at 12:37 PM, Steffen steffen.roe...@hella.com wrote: In Windows it is quite common to have a static library which itself depends on dynamic runtime libraries. For this purpose I configure ffmpeg to be built with -MD option. In this case I get many linker error of

Re: [Libav-user] git head compiling problems

On Tue, Apr 30, 2013 at 4:41 PM, Gonzalo Garramuno ggarr...@gmail.comwrote: make: *** No rule to make target `libavcodec/x86/dsputil_rnd_**template.c', needed by `libavcodec/x86/dsputil_mmx.o' After I manually added the file, the compilation later failed with: make: *** No rule to make

Re: [Libav-user] Anybody got DXVA2 running?

On Mon, Apr 22, 2013 at 4:10 PM, Lars Hammarstrand lars.hammarstr...@gmail.com wrote: You do realize that ffmpeg (the application) does not suport dxva2 ? Sorry my bad - I meant libs, not the apps. Hopefully it's not the same story with the libs regarding dxva2. Other players like

Re: [Libav-user] Anybody got DXVA2 running?

On Mon, Apr 22, 2013 at 4:26 PM, Lars Hammarstrand lars.hammarstr...@gmail.com wrote: 2013/4/22 Hendrik Leppkes h.lepp...@gmail.com VLC should work, and my set of DirectShow decoders also does ( http://code.google.com/p/lavfilters/) There was a bug a short while back which required you

Re: [Libav-user] Building with MSVC toolchain resulting in seeking problem?

On Wed, Mar 13, 2013 at 8:39 AM, Carl Eugen Hoyos ceho...@ag.or.at wrote: John Orr john.orr@... writes: On 3/12/2013 7:18 PM, John Orr wrote: If not: Does --enable-small work? I'll try in a little bit. Nope. --enable-small gets the same link error. I suspect if this is fixed, it

Re: [Libav-user] Building with MSVC toolchain resulting in seeking problem?

On Tue, Mar 12, 2013 at 4:10 PM, Carl Eugen Hoyos ceho...@ag.or.at wrote: John Orr john.orr@... writes: if (whence == AVSEEK_SIZE) { #ifndef _MSC_VER struct stat st; ret = fstat(c-fd, st); #else struct _stat64 st; ret = _fstati64( c-fd, st );

Re: [Libav-user] Building with MSVC toolchain resulting in seeking problem?

On Tue, Mar 12, 2013 at 4:33 PM, John Orr john@scala.com wrote: On 3/12/2013 11:14 AM, Hendrik Leppkes wrote: On Tue, Mar 12, 2013 at 4:10 PM, Carl Eugen Hoyos ceho...@ag.or.at wrote: John Orr john.orr@... writes: if (whence == AVSEEK_SIZE) { #ifndef _MSC_VER struct

Re: [Libav-user] ff_log2_tab defined multiple times in the fmpeg 1.1 libraries, bug or feature ??

On Thu, Feb 14, 2013 at 10:53 PM, Lars Hammarstrand lars.hammarstr...@gmail.com wrote: Hello folks! I found the original patch: avutil: Duplicate ff_log2_tab instead of sharing it across libs. The objectives for this patch was: The table is so small that the space gain is not worth the

Re: [Libav-user] Dll Versioning

On Tue, Oct 30, 2012 at 11:48 AM, Mark Kenna mark.ke...@sureviewsystems.com wrote: Hi Guys I am trying to find a way of allowing my application to be able to load multiple versions of the FFMpeg DLL's at the same time. I understand that I need to segregate the releases so that they do not

Re: [Libav-user] (AVStream *)av_malloc(sizeof(AVStream)) crashed the application

On Tue, Oct 30, 2012 at 12:28 PM, Chandranath Bhattacharyya cbhat...@adobe.com wrote: Hi Chandranath Thanks! But I already allocated memory for the pointer *ic_enc_mjpeg OK. Sorry. I did not realize you meant the crash occurred even after allocation. AVFormatContext

Re: [Libav-user] Speedup FFmpeg h264 Decoding on Android-Devices

On Sat, Aug 4, 2012 at 4:22 PM, Christian Brümmer christian.bruem...@gmx.de wrote: What about the fast-decoding tune - how can i combine that with my zero latency configuration? You should be able to provide a comma separated list for the tune parameter, try zerolatency,fastdecode

Re: [Libav-user] Why does av_seek_frame() not seek to a keyframe?

On Mon, Jul 23, 2012 at 7:12 PM, Carl Eugen Hoyos ceho...@ag.or.at wrote: Michael Bradshaw mbradshaw@... writes: Anyone have any answers on these two things? If the answer to the above would be yes can anyone else verify that ffmpeg -dump -loglevel debug -ss 38 -i 704x480-m2v-ac3.mpg

Re: [Libav-user] Why does av_seek_frame() not seek to a keyframe?

On Thu, Jul 19, 2012 at 8:31 AM, Carl Eugen Hoyos ceho...@ag.or.at wrote: Isn't this necessary for some codecs / at least for H264? Wouldn't the API do exactly the same? Sure, if you end up seeking to a non-keyframe, it should not decode garbage frames. The point here is that we would want

Re: [Libav-user] Why does av_seek_frame() not seek to a keyframe?

On Thu, Jul 19, 2012 at 9:25 AM, Carl Eugen Hoyos ceho...@ag.or.at wrote: So if the file is ~2GB and (as a user) I seek approximately to the middle of the video and decide to seek back then, the video should be decoded from the beginning to find the keyframe before the position I want to seek

Re: [Libav-user] problem with ffmpeg on mac vs win

On Wed, Apr 25, 2012 at 4:10 AM, Craig Murray craigmurray...@gmail.comwrote: I'm having some problems getting ffmpeg to behave the same on windows as opposed to mac. Mac seems to have some codec problems, where the windows version is fine. Here is my output: Your Windows version is

Re: [Libav-user] AC3 - LPCM - MPEG2 PES

2012/2/28 Andrey Utkin andrey.krieger.ut...@gmail.com: Formats LpcmDvd, LpcmHdDvd or LpcmBluRay sound strange to me, so tell us the model and give a link to device specs, so we can figure out the format names which ffmpeg knows. There is CODEC_ID_PCM_BLURAY and CODEC_ID_PCM_DVD, which are used

Re: [Libav-user] AC3 - LPCM - MPEG2 PES

Something i forgot to mention: 16-bit PCM on DVD is just plain CODEC_ID_PCM_S16BE, which does have an encoder. Only 20 and 24-bit use the special DVD variant. ___ Libav-user mailing list Libav-user@ffmpeg.org

Re: [Libav-user] avcodec_open return error -22

Hi, On Wed, Jan 11, 2012 at 8:13 AM, Jasleen Kaur jasl...@beesys.com wrote:  pContext-pix_fmt = PIX_FMT_YUYV422; The MPEG4 encoder only supports PIX_FMT_YUV420P, nothing else. - Hendrik ___ Libav-user mailing list Libav-user@ffmpeg.org

Re: [Libav-user] Question about the libraries' naming and rule #16

Hi, On Wed, Jun 8, 2011 at 2:19 AM, Soltic Lucas soltic.lu...@gmail.com wrote: From what you say, I suppose I shouldn't even care for that kind of issue, and should statically link my library against FFmpeg, as LGPL is not a problem to me. Actually I'm getting a bit lost between those who