我通过ffmpeg创建任何示例流：
ffmpeg -f lavfi -i testsrc2=r=30:size=800x800:duration=10 -c:v libx264 -g 60 -bf 0 -f h264 test.264
然后我尝试重新混合流而无需重新编码：
$ gst-launch-1.0 -v --gst-debug=trace filesrc location=test.264 ! h264parse ! queue ! qtmux ! filesink location=rawh264tomp4.mp4
但是它无法多路复用流：
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:src: caps = video/x-h264, pixel-aspect-ratio=(fraction)1/1, width=(int)800, height=(int)800, framerate=(fraction)30/1, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au, profile=(string)high, level=(string)3.1, codec_data=(buffer)0164001fffe100186764001facb2019032d80880000003008000001e078c192401000668ebc3cb22c0
/GstPipeline:pipeline0/GstQueue:queue0.GstPad:sink: caps = video/x-h264, pixel-aspect-ratio=(fraction)1/1, width=(int)800, height=(int)800, framerate=(fraction)30/1, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au, profile=(string)high, level=(string)3.1, codec_data=(buffer)0164001fffe100186764001facb2019032d80880000003008000001e078c192401000668ebc3cb22c0
/GstPipeline:pipeline0/GstQueue:queue0.GstPad:src: caps = video/x-h264, pixel-aspect-ratio=(fraction)1/1, width=(int)800, height=(int)800, framerate=(fraction)30/1, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au, profile=(string)high, level=(string)3.1, codec_data=(buffer)0164001fffe100186764001facb2019032d80880000003008000001e078c192401000668ebc3cb22c0
/GstPipeline:pipeline0/GstQTMux:qtmux0.GstQTMuxPad:video_0: caps = video/x-h264, pixel-aspect-ratio=(fraction)1/1, width=(int)800, height=(int)800, framerate=(fraction)30/1, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au, profile=(string)high, level=(string)3.1, codec_data=(buffer)0164001fffe100186764001facb2019032d80880000003008000001e078c192401000668ebc3cb22c0
/GstPipeline:pipeline0/GstQTMux:qtmux0.GstPad:src: caps = video/quicktime, variant=(string)apple
/GstPipeline:pipeline0/GstFileSink:filesink0.GstPad:sink: caps = video/quicktime, variant=(string)apple
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
ERROR: from element /GstPipeline:pipeline0/GstQTMux:qtmux0: Could not multiplex stream.
Additional debug info:
gstqtmux.c(4559): gst_qt_mux_add_buffer (): /GstPipeline:pipeline0/GstQTMux:qtmux0:
Buffer has no PTS.
Execution ended after 0:00:00.000111337
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...
它说缓冲区没有PTS。 我也尝试了qtmux，同样的错误。
ffprobe结果如下：
{
Input #0, h264, from 'test.264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (High), yuv420p(progressive), 800x800 [SAR 1:1 DAR 1:1], 30 fps, 30 tbr, 1200k tbn, 60 tbc
"programs": [
],
"streams": [
{
"index": 0,
"codec_name": "h264",
"codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
"profile": "High",
"codec_type": "video",
"codec_time_base": "1/60",
"codec_tag_string": "[0][0][0][0]",
"codec_tag": "0x0000",
"width": 800,
"height": 800,
"coded_width": 800,
"coded_height": 800,
"has_b_frames": 0,
"sample_aspect_ratio": "1:1",
"display_aspect_ratio": "1:1",
"pix_fmt": "yuv420p",
"level": 31,
"chroma_location": "left",
"field_order": "progressive",
"refs": 1,
"is_avc": "false",
"nal_length_size": "0",
"r_frame_rate": "30/1",
"avg_frame_rate": "30/1",
"time_base": "1/1200000",
"bits_per_raw_sample": "8",
"disposition": {
"default": 0,
"dub": 0,
"original": 0,
"comment": 0,
"lyrics": 0,
"karaoke": 0,
"forced": 0,
"hearing_impaired": 0,
"visual_impaired": 0,
"clean_effects": 0,
"attached_pic": 0,
"timed_thumbnails": 0
}
}
],
"format": {
"filename": "test.264",
"nb_streams": 1,
"nb_programs": 0,
"format_name": "h264",
"format_long_name": "raw H.264 video",
"size": "2516641",
"probe_score": 51
}
}