New submission from mcfrisk <[email protected]>:

Editing dnxhd files in kdenlive and playing same files through melt, I run to
this with latest ffmpeg and libswscale from git, and also from
debian-multimedi.org. Crash happens when melt/kdenlive play file to the end (a
few white frames appear before the last frame) and then seek backwards a few 
frames.

Sample file, created with ffmpeg from original m2ts:
http://mcfrisk.kapsi.fi/media/2010/libswscale_crash_00109.m2ts.dnxhd.mov

----------
files: crash.txt
messages: 11204
priority: normal
status: new
substatus: new
title: crash at libswscale/rgb2rgb_template.c:1370
type: bug

________________________________________________
FFmpeg issue tracker <[email protected]>
<https://roundup.ffmpeg.org/issue2092>
________________________________________________
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb3e69b70 (LWP 31725)]
0xb723c1df in yuvPlanartoyuy2_MMX2 (ysrc=0x0, usrc=0x0, vsrc=0x0,
    dst=0xb2d12030 "\353\200\353\200\001", width=960, height=1080,
    lumStride=0, chromStride=0, dstStride=3840)
    at libswscale/rgb2rgb_template.c:1370
1370            __asm__ volatile(
(gdb) bt full
#0  0xb723c1df in yuvPlanartoyuy2_MMX2 (ysrc=0x0, usrc=0x0, vsrc=0x0,
    dst=0xb2d12030 "\353\200\353\200\001", width=960, height=1080,
    lumStride=0, chromStride=0, dstStride=3840)
    at libswscale/rgb2rgb_template.c:1370
        y = 0
        chromWidth = 960
#1  yuv422ptoyuy2_MMX2 (ysrc=0x0, usrc=0x0, vsrc=0x0,
    dst=0xb2d12030 "\353\200\353\200\001", width=960, height=1080,
    lumStride=0, chromStride=0, dstStride=3840)
    at libswscale/rgb2rgb_template.c:1632
No locals.
#2  0xb724dd0f in yuv422pToYuy2Wrapper (c=0x8226400, src=0xb3e68c10,
    srcStride=0xb3e68be0, srcSliceY=0, srcSliceH=1080, dstParam=0xb3e68c00,
    dstStride=0xb3e68bf0) at libswscale/swscale.c:1340
No locals.
#3  0xb7253dd5 in sws_scale (c=0x8226400, src=0x823f090, srcStride=0x823f0a0,
    srcSliceY=0, srcSliceH=1080, dst=0xb3e68d3c, dstStride=0xb3e68d4c)
    at libswscale/swscale.c:1926
        srcStride2 = {0, 0, 0, 0}
        dstStride2 = {3840, 0, 0, 0}
        i = <value optimized out>
        src2 = {0x0, 0x0, 0x0, 0x0}
        dst2 = {0xb2d12030 "\353\200\353\200\001", 0x0, 0x0, 0x0}
---Type <return> to continue, or q <return> to quit---
#4  0xb7fd970b in convert_image (frame=0x81773a8, buffer=0xb3e69360,
    format=0x80c08e4, width=0xb3e6901c, height=0xb3e69018, writable=0)
    at producer_avformat.c:734
        context = 0x8226400
        output = {data = {0xb2d12030 "\353\200\353\200\001", 0x0, 0x0, 0x0},
          linesize = {3840, 0, 0, 0}}
#5  producer_get_image (frame=0x81773a8, buffer=0xb3e69360, format=0x80c08e4,
    width=0xb3e6901c, height=0xb3e69018, writable=0)
    at producer_avformat.c:1029
        this = 0x80d5f08
        producer = 0x80d4c80
        position = 71
        context = <value optimized out>
        stream = 0x817aed0
        codec_context = 0xb2d12030
        image_size = 4151040
        pkt = {pts = -1276736040, dts = 0, data = 0x818a520 "",
          size = -1208250347, stream_index = 1761607680, flags = -1208324354,
          duration = 135754664, destruct = 0xb7fb91b8, priv = 0xb7faab29,
          pos = 583061845246189916, convergence_duration = 3086716949}
        paused = <value optimized out>
        source_fps = 25
        fps = -nan(0x8000000000000)
---Type <return> to continue, or q <return> to quit---
        req_position = 71
        must_decode = 0
        last_position = 69
        use_new_seek = 0
#6  0xb7fa3eb4 in mlt_frame_get_image (this=0x81773a8, buffer=0xb3e69360,
    format=0x80c08e4, width=0xb3e6901c, height=0xb3e69018, writable=0)
    at mlt_frame.c:389
        get_image = 0xb7fd8830 <producer_get_image>
        requested_format = mlt_image_yuv422
        error = -1208121296
#7  0xb4fd153e in filter_get_image (this=0x81773a8, image=0xb3e69360,
    format=0x80c08e4, width=0xb3e6901c, height=0xb3e69018, writable=0)
    at filter_crop.c:75
        error = -1208250347
        left = 0
        right = 0
        top = 0
        bottom = 0
        owidth = <value optimized out>
        oheight = <value optimized out>
#8  0xb7fa3eb4 in mlt_frame_get_image (this=0x81773a8, buffer=0xb3e69360,
    format=0x80c08e4, width=0xb3e6901c, height=0xb3e69018, writable=0)
    at mlt_frame.c:389
---Type <return> to continue, or q <return> to quit---
        get_image = 0xb4fd1440 <filter_get_image>
        requested_format = mlt_image_yuv422
        error = -1258482624
#9  0xb4d6af96 in filter_get_image (this=0x81773a8, image=0xb3e69360,
    format=0x80c08e4, width=0xb3e6901c, height=0xb3e69018, writable=0)
    at filter_deinterlace.c:186
        method_str = <value optimized out>
        method = 4
        frame_method_str = <value optimized out>
        error = 136443033
        deinterlace = 1
        progressive = 0
        filter = 0x80dd938
#10 0xb7fa3eb4 in mlt_frame_get_image (this=0x81773a8, buffer=0xb3e69360,
    format=0x80c08e4, width=0xb3e6901c, height=0xb3e69018, writable=0)
    at mlt_frame.c:389
        get_image = 0xb4d6ad00 <filter_get_image>
        requested_format = mlt_image_yuv422
        error = -1260999424
#11 0xb4fd6732 in filter_get_image (this=0x81773a8, image=0xb3e69360,
    format=0x80c08e4, width=0xb3e6914c, height=0xb3e69148, writable=0)
    at filter_rescale.c:218
        interps = <value optimized out>
---Type <return> to continue, or q <return> to quit---
        iwidth = 1920
        iheight = 1080
        owidth = 720
        error = <value optimized out>
        filter = 0x80db650
#12 0xb7fa3eb4 in mlt_frame_get_image (this=0x81773a8, buffer=0xb3e69360,
    format=0x80c08e4, width=0xb3e6914c, height=0xb3e69148, writable=0)
    at mlt_frame.c:389
        get_image = 0xb4fd6510 <filter_get_image>
        requested_format = mlt_image_yuv422
        error = -1258461936
#13 0xb4fd6d51 in filter_get_image (this=0x81773a8, image=0xb3e69360,
    format=0x80c08e4, width=0xb3e6937c, height=0xb3e69378, writable=0)
    at filter_resize.c:262
        error = 432
        aspect_ratio = 1.0000000000000959
        owidth = 720
        oheight = 432
        rescale = <value optimized out>
#14 0xb7fa3eb4 in mlt_frame_get_image (this=0x81773a8, buffer=0xb3e69360,
    format=0x80c08e4, width=0xb3e6937c, height=0xb3e69378, writable=0)
    at mlt_frame.c:389
        get_image = 0xb4fd6bd0 <filter_get_image>
---Type <return> to continue, or q <return> to quit---
        requested_format = mlt_image_yuv422
        error = -1258460208
#15 0xb7fb5a28 in producer_get_image (this=0x818d8d0, buffer=0xb3e69360,
    format=0x80c08e4, width=0xb3e6937c, height=0xb3e69378, writable=0)
    at mlt_tractor.c:274
        data = <value optimized out>
#16 0xb7fa3eb4 in mlt_frame_get_image (this=0x818d8d0, buffer=0xb3e69360,
    format=0x80c08e4, width=0xb3e6937c, height=0xb3e69378, writable=0)
    at mlt_frame.c:389
        get_image = 0xb7fb58a0 <producer_get_image>
        requested_format = mlt_image_yuv422
        error = -1208264544
#17 0xb7fb2e53 in consumer_read_ahead_thread (arg=0x80c08a0)
    at mlt_consumer.c:705
        width = 720
        height = 576
        video_off = 0
        preview_off = <value optimized out>
        preview_format = <value optimized out>
        afmt = mlt_audio_pcm
        counter = 116
        fps = 25
        channels = 2
---Type <return> to continue, or q <return> to quit---
        frequency = 48000
        samples = 1920
        audio = 0x82309b0
        audio_off = 0
        frame = 0x818d8d0
        image = 0xb2d12030 "\353\200\353\200\001"
        ante = {tv_sec = 1279054705, tv_usec = 364720}
        count = 1
        skipped = 0
        time_wait = 0
        time_frame = 0
        time_process = 0
        skip_next = 0
        lock_object = <value optimized out>
#18 0xb7f88955 in start_thread (arg=0xb3e69b70) at pthread_create.c:300
        __res = <value optimized out>
        __ignore1 = <value optimized out>
        __ignore2 = <value optimized out>
        pd = 0xb3e69b70
        now = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1208381452, 0, 4001536,
                -1276734312, -449378397, -654168661}, mask_was_saved = 0}},
          priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0,
---Type <return> to continue, or q <return> to quit---
              cleanup = 0x0, canceltype = 0}}}
        not_first_call = <value optimized out>
        freesize = <value optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#19 0xb7f0714e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
No locals.
(

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