[gst-devel] how to learn from .yuv files and encode with h.264?

Tue Nov 2 18:57:17 CET 2010

Hi,

On Mon, Nov 1, 2010 at 5:56 PM, Rafael Sousa <rafael.lmsousa at gmail.com>wrote:

> Marco,
>
> The modification that you proposed to use the mp4mux didn't work. The same
> error occurred. I'm using the yuv format because after the transimission of
> the video, I intend to calculate the psnr between the source yuv and the
> received yuv for academic analysis. But the mp4 format also helps.
>

the attached recv.c should do the trick.  I just wonder why at this point
you can't simply use gst-launch...

Regards

>
> Sorry,for the bothering, but I've reseached a lot before appealing to this
> list.
>
> thanks for the help,
> best regards,.
>
>
> On Mon, Nov 1, 2010 at 4:44 AM, Marco Ballesio <gibrovacco at gmail.com>wrote:
>
>> Hi,
>>
>> On Mon, Nov 1, 2010 at 2:46 AM, Rafael Sousa <rafael.lmsousa at gmail.com>wrote:
>>
>>> Hi Marco
>>>
>>> thank you so much for the help, it worked very well here... But what I
>>> want is to store the video at the receiver in the disk. I tried to modify
>>> this example that you sent to me, but it didn't saved the video. I modified
>>> the following in the recv.c. I used the foreman_cif.yuv video sample
>>> (352x288).
>>>
>>>
>>> #define PIPELINE_FORMAT "\
>>> gstrtpbin name=rtpbin \
>>> udpsrc
>>> caps=\"application/x-rtp,media=(string)video,clock-rate=90000,encoding-name=(string)H264\"
>>> \
>>> port=5000 ! rtpbin.recv_rtp_sink_0 \
>>> rtpbin. ! rtph264depay ! ffdec_h264 ! *\" video/x-raw-yuv, width=352,
>>> height=288, format=(fourcc)I420 \" ! filesink location=test_rcv.yuv* ! \
>>>
>>
>> you don't need the capsfilter between decoder and filesink.. everything
>> will automagically work ;).
>>
>> Btw, unless you're in love with raw yuv I suggest using a container
>> format.. in this case you don't even need to decode and thus you could save
>> some CPU at recording time. Try with this pipeline:
>>
>>
>> gstrtpbin name=rtpbin \
>> udpsrc
>> caps=\"application/x-rtp,media=(string)video,clock-rate=90000,encoding-name=(string)H264\"
>> \
>> port=5000 ! rtpbin.recv_rtp_sink_0 \
>> rtpbin. ! rtph264depay ! *mp4mux ! filesink location=test_rcv.mp4* ! \
>>
>> etc. etc.
>>
>> NOTE: you'll need to add a way to send the EOS to the muxer element
>> (SIGHUP signal handler/read the manual ;) ), but setting the mp4mux property
>> "faststart" to true could make the file playable even when manually stopping
>> the pipeline with ctrl+c (discaimer: I've not tried it).
>>
>> Regards
>>
>>
>>> udpsrc port=5001 ! rtpbin.recv_rtcp_sink_0 \
>>> rtpbin.send_rtcp_src_0 ! udpsink port=5005 sync=false async=false"
>>>
>>>
>>> it returned an error:
>>>
>>> Error: internal error in data stream.
>>>
>>> I'm very gratefull for your help.
>>>
>>> regards
>>>
>>>
>>>
>>> On Sun, Oct 31, 2010 at 4:48 PM, Marco Ballesio <gibrovacco at gmail.com>wrote:
>>>
>>>> mmhh.. md5 from:
>>>> http://gstreamer-devel.966125.n4.nabble.com/how-to-learn-from-yuv-files-and-encode-with-h-264-td3017365.html#a3017365
>>>>
>>>> is different. Attaching the sources directly.
>>>>
>>>> Regards
>>>>
>>>>
>>>> On Sun, Oct 31, 2010 at 10:33 PM, Marco Ballesio <gibrovacco at gmail.com>wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> it appears the app you sent is actually more complex than what you
>>>>> need.. btw, some functions are not accessible from the code snippet you
>>>>> sent.
>>>>>
>>>>> I found some soare time to write a minimalistic send/receive couple of
>>>>> applications, the first one reading from a yuv file generated with:
>>>>>
>>>>> gst-launch -v videotestsrc num-buffers=2000 ! "video/x-raw-yuv,
>>>>> width=320, height=240, format=(fourcc)I420" ! filesink location=test.yuv
>>>>>
>>>>> and streaming to an address specified from command line. The second app
>>>>> opens a connection and renders all the h264 frames it receives from it.
>>>>> Hopefully it will give you an idea about how to get your app working.
>>>>>
>>>>> P.S. added back the gst-devel mailing list to the loop.
>>>>> P.P.S hopefully the attachment will make its way through the
>>>>> moderation.
>>>>>
>>>>> Regards
>>>>>
>>>>>
>>>>> On Fri, Oct 29, 2010 at 4:57 PM, Rafael Sousa <
>>>>> rafael.lmsousa at gmail.com> wrote:
>>>>>
>>>>>> Hi Gibro,
>>>>>>
>>>>>> As I said, I'm a newbie in this list, and I don't know exactly how to
>>>>>> fix the issues in my code, so, I'll send to you my whole code to you. If you
>>>>>> may take a look I'd be be very gratefull for your help.
>>>>>>
>>>>>> regards
>>>>>>
>>>>>>
>>>>>> On Fri, Oct 29, 2010 at 2:05 AM, Gibro Vacco <gibrovacco at gmail.com>wrote:
>>>>>>
>>>>>>>  Hi,
>>>>>>>
>>>>>>> it appears the sources you attached to the message did not go through
>>>>>>> the moderation.. btw a few comments below.
>>>>>>>
>>>>>>> ..snip..
>>>>>>>
>>>>>>> > *//Possible problem*
>>>>>>> > * **size = 352*288*(3/2);*
>>>>>>> > * **buffer = gst_buffer_try_new_and_alloc (size);*
>>>>>>>
>>>>>>> is there a particular reason for allocating this from the
>>>>>>> application? The pipeline is usually handling buffer allocation/release
>>>>>>> automagically.
>>>>>>>
>>>>>>> > * **if (buffer==NULL){*
>>>>>>> > * **  g_printerr("failed to allocate memory\n");*
>>>>>>> > * **}*
>>>>>>> > *//Possible problem *
>>>>>>> > * **gst_buffer_set_caps (buffer,caps);*
>>>>>>> >  *//Set up the video encoding parameters*
>>>>>>> > * **caps = gst_caps_new_simple ("video/x-raw-yuv",*
>>>>>>> > * **"format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('I', '4', '2',
>>>>>>> '0'),*
>>>>>>> > * **"width",  G_TYPE_INT, 352,*
>>>>>>> > * **"height", G_TYPE_INT, 288,*
>>>>>>> > * **"framerate", GST_TYPE_FRACTION, 25, 1, NULL);*
>>>>>>> > * **if ( !caps ) {*
>>>>>>> > * **g_printerr("Failed to create caps\n");*
>>>>>>> > * **return 0;*
>>>>>>> > * **}*
>>>>>>> >  err = gst_element_link_filtered(filesrc, time, caps);
>>>>>>>
>>>>>>> what is the time element? It's possible caps are not propagated to
>>>>>>> the encoder if not directly connected to the filesrc.
>>>>>>>
>>>>>>> Moreover, I didn't catch where you're setting the blocksize property
>>>>>>> in your filesrc to "size".
>>>>>>>
>>>>>>> ..Snip..
>>>>>>>
>>>>>>> > There is something wrong or missing in this function? How can I
>>>>>>> make
>>>>>>> > what I want to work?
>>>>>>>
>>>>>>> See my comments above ;)
>>>>>>>
>>>>>>> P.S. Maybe you could attach (or better copy to pastebin) the output
>>>>>>> when setting GST-DEBUG to 2 from the shell prior executing your binary.
>>>>>>>
>>>>>>> Regards
>>>>>>>
>>>>>>>
>>>>>>> >
>>>>>>> > Please, I need help.
>>>>>>> >
>>>>>>> > thanks for the previous answers and thanks in advance
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
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