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rk3588上运行4个转码线程，工作一分钟左右，程序异常退出 #152
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Reference: starred/ffmpeg-rockchip#152
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Originally created by @changliwu on GitHub (Mar 5, 2025).
您好：
rk3588上运行2个转码线程，工作正常，但是增加到4个转码，程序就会在decode时，异常退出，请问是什么原因？
Thread 17 "TranscodeD" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7cd7171ce0 (LWP 2086)]
0x0000007ff57f278c in mpp_mem_pool_get_f () from /lib/aarch64-linux-gnu/librockchip_mpp.so.1
(gdb) bt
#0 0x0000007ff57f278c in mpp_mem_pool_get_f () from /lib/aarch64-linux-gnu/librockchip_mpp.so.1
#1 0x0000007ff56d180c in mpp_packet_new () from /lib/aarch64-linux-gnu/librockchip_mpp.so.1
#2 0x0000007ff56d2a28 in mpp_packet_copy_init () from /lib/aarch64-linux-gnu/librockchip_mpp.so.1
#3 0x0000007ff56a3bfc in Mpp::put_packet(void*) () from /lib/aarch64-linux-gnu/librockchip_mpp.so.1
#4 0x0000007ff56a696c in mpi_decode_put_packet(void*, void*) () from /lib/aarch64-linux-gnu/librockchip_mpp.so.1
#5 0x0000007ff74f6694 in ?? () from /lib/libavcodec.so.60
#6 0x0000007ff716aa1c in ?? () from /lib/libavcodec.so.60
#7 0x0000007ff716b0f8 in avcodec_send_packet () from /lib/libavcodec.so.60
#8 0x000000555555484c in CTranscode::decode (this=0x7fffffe2f0, pVideoPkt=0x7d64000b70, pFrame=0x7cc8000be0) at transcode.cpp:127
#9 0x0000005555555074 in CTranscode::RunDoThread (this=0x7fffffe2f0) at transcode.cpp:300
#10 0x00000055555545e4 in CTranscode::DoThread (pArg=0x7fffffe2f0) at transcode.cpp:86
#11 0x0000007ff5a8d5c8 in ?? () from /lib/aarch64-linux-gnu/libc.so.6
#12 0x0000007ff5af5edc in ?? () from /lib/aarch64-linux-gnu/libc.so.6
@changliwu commented on GitHub (Mar 5, 2025):
链接库版本信息如下：
pi@NanoPi-M6:~/RK3588S/transcode$ ldd TranscodeD
linux-vdso.so.1 (0x0000007f9b83e000)
libavcodec.so.60 => /lib/libavcodec.so.60 (0x0000007f9a720000)
libavutil.so.58 => /lib/libavutil.so.58 (0x0000007f99640000)
libstdc++.so.6 => /lib/aarch64-linux-gnu/libstdc++.so.6 (0x0000007f99410000)
libgcc_s.so.1 => /lib/aarch64-linux-gnu/libgcc_s.so.1 (0x0000007f993e0000)
libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000007f99230000)
/lib/ld-linux-aarch64.so.1 (0x0000007f9b805000)
libswresample.so.4 => /lib/libswresample.so.4 (0x0000007f99200000)
libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000007f99160000)
librga.so.2 => /lib/aarch64-linux-gnu/librga.so.2 (0x0000007f99110000)
liblzma.so.5 => /lib/aarch64-linux-gnu/liblzma.so.5 (0x0000007f990d0000)
librockchip_mpp.so.1 => /lib/aarch64-linux-gnu/librockchip_mpp.so.1 (0x0000007f98e90000)
libz.so.1 => /lib/aarch64-linux-gnu/libz.so.1 (0x0000007f98e60000)
libdrm.so.2 => /lib/aarch64-linux-gnu/libdrm.so.2 (0x0000007f98e30000)
@nyanmisaka commented on GitHub (Mar 5, 2025):
https://github.com/nyanmisaka/ffmpeg-rockchip/wiki/Compilation
mpp_mem_pool_get_f()is a func from MPP -413e74bfe6/osal/mpp_mem_pool.cpp (L191)Make sure you built and installed MPP from
instead of the preinstalled MPP from the vendor.
@changliwu commented on GitHub (Mar 5, 2025):
我下载的是git clone -b jellyfin-mpp --depth=1 https://github.com/nyanmisaka/mpp.git rkmpp这个版本
请问ffmpeg-rockchip/doc/examples/中的transcode.c,vaapi_transcode.c,qsv_transcode.c 三个转码demo中，我在rk3588上运行应该参考哪个呢？
@nyanmisaka commented on GitHub (Mar 5, 2025):
Check dmesg and see why it crashed, mem pool errors usually mean out of memory or outdated kernel version (uname -a).
qsv_transcode is the most similar one, except for the codec suffix and pixel format.
@changliwu commented on GitHub (Mar 5, 2025):
qsv_transcode.c 中修改如下：
1）av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_QSV, NULL, NULL, 0) 为av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_RKMPP, NULL, NULL, 0);
2）encoder_ctx->pix_fmt = AV_PIX_FMT_QSV为encoder_ctx->pix_fmt = AV_PIX_FMT_NV12
3）decoder = avcodec_find_decoder_by_name("h264_qsv") 为decoder = avcodec_find_decoder_by_name("h264_rkmpp")
然后编译运行./qsv_transcode ../../../春天.mp4 h264_rkmpp 1.h264 0 出现如下错误：
Thread 1 "qsv_transcode" received signal SIGSEGV, Segmentation fault.
0x0000007ff5bd02bc in av_buffer_ref () from /lib/libavutil.so.58
(gdb) bt
#0 0x0000007ff5bd02bc in av_buffer_ref () from /lib/libavutil.so.58
#1 0x0000005555552528 in dec_enc (pkt=0x5555577370, enc_codec=0x7ff77a4520, optstr=0x7ffffff64f "0")
at qsv_transcode.c:277
#2 0x0000005555552d40 in main (argc=5, argv=0x7ffffff328) at qsv_transcode.c:408
请问哪里修改有问题？
@changliwu commented on GitHub (Mar 5, 2025):
pi@NanoPi-M6:~$ uname -a
Linux NanoPi-M6 6.1.99 #32 SMP Mon Jan 20 15:50:32 CST 2025 aarch64 aarch64 aarch64 GNU/Linux
@changliwu commented on GitHub (Mar 6, 2025):
dmesg 消息打印如下：
[60657.440714] rk_vcodec: mpp_wait_result_default:989: wait task break by signal
@nyanmisaka commented on GitHub (Mar 7, 2025):
There is no support for modifying
qsv_transcode. You'll have to do it on your own.Regarding decoding with ffmpeg-rockchip, I tested transcoding 16x 1080p videos simultaneously on RK3588 without any problems.
@changliwu commented on GitHub (Mar 7, 2025):
谢谢你的回复，请问有没有demo提供一个呢?