<html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body> Hey, I have asked this question before on Stackoverflow, but I think it might be better targeted to ask it here. <div class="s-prose js-post-body" itemprop="text"> I am currently trying to convert a live feed from a Raspberry Pi camera to H264 and store it as a mp4 video using gstreamer. Since I am using a Raspberry Pi 1, I need to use the hardware accelerated video encoding as otherwise the encoder cannot keep up. I tried the following pipeline, which I feed manually with RGB image data: <pre><code>appsrc name=src format=time is-live=true caps=video/x-raw,format=(string)RGB,width=640,height=480,bpp=24,depth=24,framerate=20/1 ! autovideoconvert ! queue ! omxh264enc ! mp4mux ! filesink location=output.mp4 </code></pre> However, it fails with the following output: <pre><code>0:00:01.193743067 2469 0x1f5b320 WARN autoconvert gstautoconvert.c:1048:gst_auto_convert_sink_query:<autoconvertchild> Got query allocation while no element was selected, letting through 0:00:01.205271623 2469 0x1f5b2c0 WARN omxvideoenc gstomxvideoenc.c:2944:gst_omx_video_enc_propose_allocation:<omxh264enc-omxh264enc0> allocation query does not contain caps 0:00:02.109098855 2469 0x1f5b320 WARN v4l2bufferpool gstv4l2bufferpool.c:1189:gst_v4l2_buffer_pool_dqbuf:<v4l2convert0:pool:src> Driver should never set v4l2_buffer.field to ANY 0:00:02.172643411 2469 0xa2703200 WARN GST_PADS gstpad.c:4226:gst_pad_peer_query:<omxh264enc-omxh264enc0:src> could not send sticky events 0:00:02.193615605 2469 0xa2703200 WARN omxvideoenc gstomxvideoenc.c:1602:gst_omx_video_enc_loop:<omxh264enc-omxh264enc0> error: Internal data stream error. 0:00:02.197108471 2469 0xa2703200 WARN omxvideoenc gstomxvideoenc.c:1602:gst_omx_video_enc_loop:<omxh264enc-omxh264enc0> error: stream stopped, reason not-negotiated 0:00:02.329828367 2469 0x1f7eaa0 WARN bufferpool gstbufferpool.c:1394:gst_buffer_pool_set_flushing:<v4l2convert0:pool:sink> can't change flushing state of inactive pool 0:00:02.333992206 2469 0x1f7eaa0 WARN bufferpool gstbufferpool.c:1394:gst_buffer_pool_set_flushing:<v4l2convert0:pool:sink> can't change flushing state of inactive pool </code></pre> Curiously, if I replace <code>omxh264enc</code> with the non-accelerated version <code>x264enc</code>, it works (although it falls behind after a couple of frames). I assume that the warnings right before <code>Internal data stream error</code> might give some indication to what is actually going wrong, but I cannot make much sense out of them. The full code can be found here: <a href="https://pastebin.com/pgr940yu" rel="nofollow noreferrer">https://pastebin.com/pgr940yu</a>, as well as the full debug output of that code here: <a href="https://pastebin.com/CLwAfxMG" rel="nofollow noreferrer">https://pastebin.com/CLwAfxMG</a>. Thanks a lot in advance! Best, Homan </div> </body> </html>