search

OpenVisualCloud / SVT-HEVC

SVT HEVC encoder. Scalable Video Technology (SVT) is a software-based video coding technology that is highly optimized for Intel® Xeon® processors. Using the open source SVT-HEVC encoder, it is possible to spread video encoding processing across multiple Intel® Xeon® processors to achieve a real advantage of processing efficiency.
Other
507 stars 169 forks source link

libsvt_hevc has the problem to output the resolution 720x1280 #601

Closed ailuo2019 closed 2 years ago

ailuo2019 commented 3 years ago

ffmpeg -y -c:v h264_cuvid -i xxxx_264_1920x1080.mp4 -c:a copy -c:v libsvt_hevc -vf scale=w=720:h=1280 vertical.mp4 It gives me a segmentation fault. Output #0, mp4, to 'vertical.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.76.100 Stream #0:0(eng): Video: hevc (hev1 / 0x31766568), yuv420p(tv, progressive), 720x1280 [SAR 32:9 DAR 2:1], q=2-31, 7000 kb/s, 29.97 fps, 30k tbn (default) Metadata: handler_name : ?Mainconcept Video Media Handler vendor_id : [0][0][0][0] encoder : Lavc58.134.100 libsvt_hevc Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default) Metadata: handler_name : #Mainconcept MP4 Sound Media Handler vendor_id : [0][0][0][0] Segmentation fault0 q=0.0 size= 0kB time=00:00:00.06 bitrate= 5.5kbits/s speed= 3x

It worked fine if I use the encoder hevc_nvenc. The input file I used is h264 HD file, 1920x1080.

tianjunwork commented 3 years ago

Hi @ailuo2019 , Thanks reporting the issue. But I didn't reproduce with another 1080p source file.

  1. Could you try to find the call stack when it crashes?
  2. If the crash is from SVT-HEVC, is it source file related? Could you try another file? image
ailuo2019 commented 3 years ago

Hi, the input I used is not a YUV file, is a .mp4 file. Would you please try that? Maybe the problem is triggered in the transcoding.

On Fri, Jun 18, 2021 at 8:09 PM Jun @.***> wrote:

Hi @ailuo2019 https://github.com/ailuo2019 , Thanks reporting the issue. But I didn't reproduce with another 1080p source file.

  1. Could you try to find the call stack when it crashes?
  2. If the crash is from SVT-HEVC, is it source file related? Could you try another file? [image: image] https://user-images.githubusercontent.com/4551215/122629235-57082c00-d070-11eb-8117-54fb8e64507d.png

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/OpenVisualCloud/SVT-HEVC/issues/601#issuecomment-864346910, or unsubscribe https://github.com/notifications/unsubscribe-auth/ATBNXMCUGY3FF3FL3AX3F5LTTQC7NANCNFSM462R32EA .

tianjunwork commented 3 years ago

Hi @ailuo2019 , SVT library is only an encoder. No matter what source format, input to encoder is always decoded YUV frame. Since I didn't see crash with y4m source, it may not be encoder to blame. Could you run gdb to get the backtrace after crash?